1 ___________________ Safety notes 2 ___________________ General SENTRON Circuit breakers 3WT Operating Instructions 3 ___________________ Product description 4 ___________________ Installation 5 ___________________ Connection 6 ___________________ Electronic components Auxiliary release and 7 ___________________ auxiliary switches ___________________ 8 Commissioning ___________________ 9 Maintenance ___________________ 10 Accessories ___________________ 11 Troubleshooting ___________________ 12 Dimension drawings ___________________ 13 Circuit diagrams 12/2018 9239 0020 176 06 Legal information Warning notice system This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are graded according to the degree of danger. DANGER indicates that death or severe personal injury will result if proper precautions are not taken. WARNING indicates that death or severe personal injury may result if proper precautions are not taken. CAUTION indicates that minor personal injury can result if proper precautions are not taken. NOTICE indicates that property damage can result if proper precautions are not taken. If more than one degree of danger is present, the warning notice representing the highest degree of danger will be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to property damage. Qualified Personnel The product/system described in this documentation may be operated only by personnel qualified for the specific task in accordance with the relevant documentation, in particular its warning notices and safety instructions. Qualified personnel are those who, based on their training and experience, are capable of identifying risks and avoiding potential hazards when working with these products/systems. Proper use of Siemens products Note the following: WARNING Siemens products may only be used for the applications described in the catalog and in the relevant technical documentation. If products and components from other manufacturers are used, these must be recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensure that the products operate safely and without any problems. The permissible ambient conditions must be complied with. The information in the relevant documentation must be observed. Trademarks All names identified by (R) are registered trademarks of Siemens AG. The remaining trademarks in this publication may be trademarks whose use by third parties for their own purposes could violate the rights of the owner. Disclaimer of Liability We have reviewed the contents of this publication to ensure consistency with the hardware and software described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the information in this publication is reviewed regularly and any necessary corrections are included in subsequent editions. Siemens AG Division Energy Management Postfach 32 20 91050 ERLANGEN GERMANY Document order number: 3ZX1812-0WT82-0AN0 12/2018 Subject to change Copyright (c) Siemens AG 2008. All rights reserved Table of contents 1 Safety notes............................................................................................................................................... 9 2 General .................................................................................................................................................... 11 3 4 5 6 2.1 Standard specifications ...........................................................................................................11 2.2 Transport.................................................................................................................................12 Product description .................................................................................................................................. 15 3.1 3.1.1 3.1.2 Design .....................................................................................................................................15 Circuit breaker.........................................................................................................................15 Guide frame ............................................................................................................................16 3.2 Label .......................................................................................................................................17 3.3 Indicators of the Circuit breaker ..............................................................................................18 Installation ............................................................................................................................................... 19 4.1 Installation ...............................................................................................................................19 4.2 Racking in/out of the Circuit breaker.......................................................................................21 4.3 Position of the Circuit breaker in the guide frame...................................................................25 4.4 Remove the Circuit breaker from guide frame ........................................................................26 4.5 Inserting the Circuit breaker in the guide frame......................................................................27 4.6 Door sealing frame IP41 .........................................................................................................28 Connection .............................................................................................................................................. 31 5.1 5.1.1 5.1.2 5.1.3 Connecting bar........................................................................................................................31 Horizontal connection .............................................................................................................31 Vertical connection..................................................................................................................32 Front connection .....................................................................................................................34 5.2 Connecting the main conductor ..............................................................................................36 5.3 Connecting the auxiliary conductor.........................................................................................40 5.4 Connection for protective conductor .......................................................................................43 Electronic components ............................................................................................................................ 45 6.1 Overcurrent release - functional overview ..............................................................................45 6.2 ETU35WT overcurrent release ...............................................................................................47 6.3 ETU37WT overcurrent release ...............................................................................................49 6.4 ETU45WT overcurrent release ...............................................................................................52 6.5 ETU47WT overcurrent release ...............................................................................................55 6.6 Indicators on the overcurrent release .....................................................................................59 6.7 Protection functions ................................................................................................................61 3WT Operating Instructions, 12/2018, 9239 0020 176 06 5 Table of contents 7 8 9 10 6.7.1 6.7.2 6.7.3 6.7.4 6.7.5 6.7.6 Basic protection functions ...................................................................................................... 61 LT: Overload protection (Long time), L-tripping ..................................................................... 61 ST: Short-time delay short-circuit release (Short time), S tripping ........................................ 62 INST: Instantaneous short-circuit release (Instantaneous), I-tripping ................................... 63 GF: Ground-fault protection (Ground-fault), G-tripping .......................................................... 64 N: Neutral conductor protection (Neutral), N-tripping ............................................................ 65 6.8 6.8.1 6.8.2 Additional functions ................................................................................................................ 66 Phase-failure protection ......................................................................................................... 66 Thermal memory (can be switched on/off) ............................................................................ 66 6.9 Menus on the ETU35WT ETU37WT display ......................................................................... 67 6.10 6.10.1 6.10.2 Alphanumeric display of ETU45WT and ETU47WT .............................................................. 69 Modifying the displays inclination........................................................................................... 69 Menu structure ....................................................................................................................... 71 6.11 Communication ...................................................................................................................... 78 6.12 Breaker Status Sensor (BSSWT)........................................................................................... 80 6.13 COM16WT module ................................................................................................................ 82 6.14 Metering function ................................................................................................................... 85 6.15 External voltage supply .......................................................................................................... 88 Auxiliary release and auxiliary switches ................................................................................................... 91 7.1 Overview ................................................................................................................................ 91 7.2 Setting the delay time of the undervoltage release................................................................ 93 Commissioning ........................................................................................................................................ 95 8.1 8.1.1 8.1.2 Charging the stored-energy spring mechanism ..................................................................... 95 Manual charging..................................................................................................................... 95 By means of motorized operating mechanism....................................................................... 96 8.2 Preparing for operation .......................................................................................................... 97 8.3 Closing operation ................................................................................................................... 98 8.4 Opening operation ................................................................................................................. 98 8.5 Recommissioning after opening operation by means of overcurrent release ....................... 99 Maintenance .......................................................................................................................................... 101 9.1 Preparatory work .................................................................................................................. 102 9.2 Checking the arc chutes ...................................................................................................... 104 9.3 Checking the wear on the contacts ...................................................................................... 105 9.4 Replacing the conducting paths ........................................................................................... 105 9.5 Internal self-test of the overcurrent release function............................................................ 118 9.6 Internal self-test of Circuit breaker with tripping operation................................................... 120 9.7 Replacing the overcurrent release ....................................................................................... 122 Accessories ........................................................................................................................................... 125 10.1 Accessories .......................................................................................................................... 125 3WT 6 Operating Instructions, 12/2018, 9239 0020 176 06 Table of contents 10.2 10.2.1 10.2.2 Accessories - general ...........................................................................................................126 Removing the operating device ............................................................................................127 Installing the operating device ..............................................................................................128 10.3 Hand-held test device ...........................................................................................................129 10.4 10.4.1 10.4.2 External transformer for neutral conductors .........................................................................134 External transformer for neutral conductors (for ETU37WT ... ETU47WT) ..........................134 External ground fault current transformer (only for ETU47WT) ............................................136 10.5 Retrofitting the internal N transformer...................................................................................137 10.6 Counting mechanism ............................................................................................................140 10.7 Castell lock............................................................................................................................142 10.8 3WT lock (set), 3 locks with 2 keys.......................................................................................148 10.9 10.9.1 10.9.2 10.9.3 10.9.4 Mechanical interlock .............................................................................................................154 Information about mechanical interlock ................................................................................154 Mechanical interlock of fixed-mounted Circuit breakers .......................................................161 Mechanical interlock of withdrawable Circuit breakers .........................................................167 Installing Bowden wire ..........................................................................................................172 10.10 10.10.1 10.10.2 Door interlock ........................................................................................................................175 Door interlock for fixed-mounted Circuit breaker ..................................................................175 Door interlock for guide frame ..............................................................................................179 10.11 10.11.1 10.11.2 Phase barrier ........................................................................................................................182 Phase barrier for fixed-mounted Circuit breaker ...................................................................183 Phase barrier for guide frame ...............................................................................................189 10.12 Automatic mechanical resetting device after overcurrent tripping ........................................192 10.13 Switching from fixed-mounted Circuit breakers to withdrawable Circuit breakers ...............198 10.14 Vertical connections for fixed-mounted Circuit breaker ........................................................207 10.15 Connection bars for guide frame (frame size I) ....................................................................211 10.16 Connection bars / connection pieces for guide frame version FS II .....................................214 10.17 Position signaling switch for guide frame .............................................................................218 10.18 Shutters .................................................................................................................................221 10.19 Arc chute cover .....................................................................................................................228 11 Troubleshooting ..................................................................................................................................... 233 12 Dimension drawings .............................................................................................................................. 235 12.1 Fixed-mounted Circuit breaker, Frame size I, 3 pole and 4 pole ..........................................235 12.2 Fixed-mounted Circuit breaker, Frame size II, 3 pole and 4 pole.........................................237 12.3 Withdrawable Circuit breaker, Frame size I, 3 pole and 4 pole ............................................239 12.4 Withdrawable Circuit breaker, Frame size II, 3 pole and 4 pole ...........................................241 12.5 Accessories 3 pole / 4 pole ...................................................................................................243 12.6 Door cutout 3 pole / 4 pole ....................................................................................................244 12.7 Current transformer for N conductor .....................................................................................245 3WT Operating Instructions, 12/2018, 9239 0020 176 06 7 Table of contents 13 Circuit diagrams ..................................................................................................................................... 247 13.1 Overall circuit diagram ......................................................................................................... 247 13.2 Circuit diagram for undervoltage release with delay ............................................................ 249 13.3 Terminal diagrams ............................................................................................................... 250 Glossary ................................................................................................................................................ 251 3WT 8 Operating Instructions, 12/2018, 9239 0020 176 06 Safety notes 1 3WT Operating Instructions, 12/2018, 9239 0020 176 06 9 Safety notes 3WT 10 Operating Instructions, 12/2018, 9239 0020 176 06 2 General 2.1 Standard specifications DANGER Hazardous voltage During operation, certain Circuit breaker and guide frame components are subject to hazardous voltages or spring force. Note the operating instructions and warnings. If these are not observed, this can result in death, severe injury, or substantial material damage. Ambient conditions The Circuit breakers are designed to be operated in enclosed rooms in which the operating conditions are not affected by dust or corrosive vapors/gases. Suitable enclosures must be used in dusty or damp conditions Technical specifications For information about technical specifications, see the Catalog LV 35. Standards GB/T 14048.2 IEC 60947-2 EN 60947-2 3WT Operating Instructions, 12/2018, 9239 0020 176 06 11 General 2.2 Transport 2.2 Transport Overseas packaging Check the humidity indicator plate. * Sealed packaging ineffective. * Check Circuit breaker for corrosion. * Report any damage to transport company. Good Long-term storage Replace or dry the desiccant. Seal the plastic film. Check the packaging regularly. Unpacking and storing the Circuit breaker Unpack the Circuit breaker and make sure that it was not damaged during transportation. If the Circuit breaker or guide frame is not to be installed immediately, it must be stored and shipped in its original packaging only. For withdrawable Circuit breaker: Racking in/out of the Circuit breaker (Page 21) Remove the Circuit breaker from guide frame (Page 26) Inserting the Circuit breaker in the guide frame (Page 27) CAUTION Do not place the Circuit breaker on its back. 3WT 12 Operating Instructions, 12/2018, 9239 0020 176 06 General 2.2 Transport Transportation with crane Caution! Circuit breaker guide frame Circuit breaker + guide frame Do not place the Circuit breaker on its back. Frame size / no. of poles Weight for reference I/3 38 Kg 23 Kg 61 Kg I/4 51 Kg 28 Kg 79 Kg II / 3 63 Kg 37 Kg 100 Kg II / 4 76 Kg 48 Kg 124 Kg Setting down the guide frame Only set it down on its base plate. If the surface is uneven, use a level base. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 13 General 2.2 Transport 3WT 14 Operating Instructions, 12/2018, 9239 0020 176 06 3 Product description 3.1 Design 3.1.1 Circuit breaker Arc chute Options label Carrying handle Counting indicator Type label Store-energy indicator Racking pictogram Ready to close indicator Spring charging lever Breaker foot Draw-out unit transport shaft Draw-out window Position indicator CASTELL Locking Overcurrent release (ETU) " Mechanical OFF" button " Mechanical ON" button Breaker ON/OFF indicator Reset button Front panel Receptacle for auxiliary contacts 3WT Operating Instructions, 12/2018, 9239 0020 176 06 15 Product description 3.1 Design 3.1.2 Guide frame Hole for crane hook Crane hook label Type label guide rail Shutter plate (option) Grounding terminal Door interlocking (option) Coding screw Locking device guide rail Guide rail Disconnecting contacts Locking device shutter Shutter operating device (option) Position signaling switch (option) Crank handle Auxiliary disconnects 3WT 16 Operating Instructions, 12/2018, 9239 0020 176 06 Product description 3.2 Label 3.2 Label Circuit breaker options label (With terminal designations) Type label Circuit breaker 3WT Operating Instructions, 12/2018, 9239 0020 176 06 17 Product description 3.3 Indicators of the Circuit breaker 3.3 Indicators of the Circuit breaker Indicator label Color Position status Green Blue Red Disconnection Test Connection 3WT 18 Operating Instructions, 12/2018, 9239 0020 176 06 4 Installation 4.1 Installation WARNING Before installing the device, make sure that the minimum distances from insulated, grounded, and live components in the switchgear are observed. Details can be found in Catalog LV 35. Installation position WARNING Breaker mounted tilted towards the frontside: Breaker may slide out on rails, when racked in disconnect position. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 19 Installation 4.1 Installation Installation on a horizontal surface For fixed-mounted Circuit breakers: 4 x M8-8.8 bolts + strain washers For withdrawable Circuit breakers: Attaching the base plate: 4 x M8-8.8 bolts + nuts + washers Arc chute cover If several draw-out Circuit breakers are arranged one above the other in cubicles without compartment bases we recommend to use arc chute covers. See chapter Arc chute cover (Page 228) 3WT 20 Operating Instructions, 12/2018, 9239 0020 176 06 Installation 4.2 Racking in/out of the Circuit breaker 4.2 Racking in/out of the Circuit breaker NOTICE The Circuit breaker must only be racked once the operator panel has been mounted and secured. If a shutter is installed, a change of direction is not permitted while the Circuit breaker is being racked until a defined position has been reached (disconnected/test/connected position). Note The indicator on the Circuit breaker - position latching is not provided. The position can only be checked via the indicator on the Circuit breaker. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 21 Installation 4.2 Racking in/out of the Circuit breaker Racking out 1. Press the OFF button and open the slide switch simultaneously. 2. Insert crank handle and racking out 3. Turn to test position 4. Turn to disconnected position 5. Remove crank handle 6. Close the slide switch 3WT 22 Operating Instructions, 12/2018, 9239 0020 176 06 Installation 4.2 Racking in/out of the Circuit breaker Racking in 1. Press the OFF button and open the slide switch simultaneously. 2. Insert crank handle and racking in 3. Turn to test position 4. Turn to connected position 5. Remove crank handle 6. Close the slide switch 3WT Operating Instructions, 12/2018, 9239 0020 176 06 23 Installation 4.2 Racking in/out of the Circuit breaker Lockable Attaching the racking handle 1. Secure the brackets 2. Attach the racking handle Note The racking handle can also be attached on the right-hand side. 3WT 24 Operating Instructions, 12/2018, 9239 0020 176 06 Installation 4.3 Position of the Circuit breaker in the guide frame 4.3 Position of the Circuit breaker in the guide frame Diagram Position and display Main and auxiliary circuit Cubicle door Shutter The auxiliary terminals of the breaker are outside of the auxiliary connector blocks of the guide frame. Open closed The auxiliary terminals of the breaker are inside the auxiliary connector blocks of the guide frame. Closed closed Closed closed Closed open The guide rails are back in their initial position. Main circuits disconnected Auxiliary circuits connected Main circuits connected Auxiliary circuits connected Main circuit Auxiliary circuit Shutter Cubicle door 3WT Operating Instructions, 12/2018, 9239 0020 176 06 25 Installation 4.4 Remove the Circuit breaker from guide frame 4.4 Remove the Circuit breaker from guide frame Remove the Circuit breaker Interlocking device Block the shutter. The guide rails can be blocked by means of two padlocks to prevent installation of a Circuit breaker. 3WT 26 Operating Instructions, 12/2018, 9239 0020 176 06 Installation 4.5 Inserting the Circuit breaker in the guide frame 4.5 Inserting the Circuit breaker in the guide frame NOTICE Please remove the lock if there is any. 1. Pull out the guide rails. 2. Insert the Circuit breaker. 3. lift it up slightly 4. Push it to the end stop of the disconnected position. The correct position can be identified as the guiding rails must be again back in their initial position, and the auxiliary contacts hidden. Close the cubicle door. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 27 Installation 4.6 Door sealing frame IP41 4.6 Door sealing frame IP41 Preparing the switchgear door Mounting surface of Circuit breaker or guide frame Centre of front panel Eight mounting holes for the door sealing frame 3WT 28 Operating Instructions, 12/2018, 9239 0020 176 06 Installation 4.6 Door sealing frame IP41 Installing the sealing frame 3WT Operating Instructions, 12/2018, 9239 0020 176 06 29 5 Connection 5.1 Connecting bar WARNING Attention, the fastening screws above and below the connection bars on the back of the guide frame are voltage-carrying! See chapter Dimension drawings (Page 235) The 3-pole products are taken as examples in below images which are just for reference, and for detailed information please see Catalog LV35. 5.1.1 Horizontal connection The horizontal connection is the standard connection for fixed-mounted Circuit breakers and guide frame. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 31 Connection 5.1 Connecting bar 5.1.2 Vertical connection Fixed-mounted breaker Take 3-pole product as an example: Frame size I: 1250 A, N/S class; 1600 A, N class; 1600 A, S class; Frame size II: 2500 A 3200 A Vertical terminals left and right asymmetrical Frame size II: 4000 A Vertical terminals left and right asymmetrical 3WT 32 Operating Instructions, 12/2018, 9239 0020 176 06 Connection 5.1 Connecting bar Guide frame Take 3-pole product as an example: Frame size I: 1250 A, N/S class; 1600 A, N class; 1600 A, S class; Frame size II: 2500 A 3200 A Vertical terminals left and right asymmetrical Frame size II: 3800 A Vertical terminals left and right asymmetrical 3WT Operating Instructions, 12/2018, 9239 0020 176 06 33 Connection 5.1 Connecting bar 5.1.3 Front connection Fixed-mounted breaker Frame size I: 1250 A, N/S class; 1600 A, N class; 1600 A, S class; Front connection with double hole ( holes according to DIN 43673) Frame size II: 2500 A 3200 A Front connection with double hole ( holes according to DIN 43673) 3WT 34 Operating Instructions, 12/2018, 9239 0020 176 06 Connection 5.1 Connecting bar Guide frame Frame size I: 1250 A, N/S class; 1600 A, N class; 1600 A, S class; Front connection with double hole ( holes according to DIN 43673) Frame size II: 2500 A 3200 A Front connection with double hole ( holes according to DIN 43673) 3WT Operating Instructions, 12/2018, 9239 0020 176 06 35 Connection 5.2 Connecting the main conductor 5.2 Connecting the main conductor Cleaning the main conductor connection Cleaning the copper bars Main conductor connection Terminal screws with strain washers M12 (internal diameter = 12 mm to DIN 6769-Fst) Recommended tightening torque 70 Nm Required screw strength 8.8 to DIN 267 Connecting the Circuit breaker with front connections 1. Disconnect the main/control circuits from the power supply and set the withdrawable Circuit breaker to the maintenance position. 2. Open the Circuit breaker mechanically. Please see chapter Preparatory work (Page 102) 3WT 36 Operating Instructions, 12/2018, 9239 0020 176 06 Connection 5.2 Connecting the main conductor In systems with connection points accessible from the rear 1. Remove the arc chutes. 2. Secure the system-side rails. 3. Attach arc chutes 3WT Operating Instructions, 12/2018, 9239 0020 176 06 37 Connection 5.2 Connecting the main conductor In systems with connection points not accessible from the rear 1. Remove the arc chutes. 2. Remove the screws and pull out the operator panel. 3. Unlock the secondary disconnect and remove it by pulling it up. 4. Swing the secondary disconnect forward. 5. Secure the system-side rails. 6. Attach arc chutes 3WT 38 Operating Instructions, 12/2018, 9239 0020 176 06 Connection 5.2 Connecting the main conductor 7. Swing the secondary disconnect backward. 8. Snap on the secondary disconnect. 9. Attach and secure the operator panel. Supporting the main conductor Reinforcing the main conductor Horizontal connection Vertical connection Front connection 3WT Operating Instructions, 12/2018, 9239 0020 176 06 39 Connection 5.3 Connecting the auxiliary conductor 5.3 Connecting the auxiliary conductor For fixed-mounted Circuit breakers Conductor connection to connector 1. Release latching. 2. Connect the conductor (note the coding). 3. Attach the encoded connector. Note Route the auxiliary conductor only in the front section of the Circuit breaker. 3WT 40 Operating Instructions, 12/2018, 9239 0020 176 06 Connection 5.3 Connecting the auxiliary conductor For withdrawable Circuit breakers Connection between conductor and connector 1. Connect the connector. 2. Connect the conductor. Note Route the auxiliary conductor only in the front section of the circuit breaker. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 41 Connection 5.3 Connecting the auxiliary conductor System-side routing of auxiliary conductor Auxiliary conductor Area in which auxiliary conductor is routed Area in which auxiliary conductor must not be routed Article No. for spare part Description Article No. Auxiliary supply connector for fixed-mounted Circuit breakers 3WT9825-1JC00 Auxiliary supply connector for guide frame 3WT9827-1JA00 3WT 42 Operating Instructions, 12/2018, 9239 0020 176 06 Connection 5.4 Connection for protective conductor 5.4 Connection for protective conductor Fixed-mounted Circuit breaker Guide frame Connection for protective conductor. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 43 Connection 5.4 Connection for protective conductor 3WT 44 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.1 6 Overcurrent release - functional overview NOTICE We have checked the content of this manual to ensure that it is consistent with the hardware and software described. Discrepancies cannot be wholly excluded, however, which means that we cannot assume responsibility for the correctness of the information provided here. The information in this manual is reviewed on a regular basis and any necessary corrections are included in subsequent editions. Overcurrent protection settings CAUTION Adjust parameters only when the Circuit breaker is switched off. If the parameters are modified with the circuit-breaker switched on, this can trip the Circuit breaker unintentionally. CAUTION When planning a project and considering selectivity it has to be ensured loads carried by the Circuit breaker will not exceed the breaking capacity stated in the 3WT catalogue. Upstream protection equipment has to be set in a way, that these faults are interrupted safely. All parameters are adjusted with rotary coding switches. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 45 Electronic components 6.1 Overcurrent release - functional overview Overview of functions Overcurrent release Functions ETU35WT ETU37WT -- -- Short-time can be switched ON/OFF -- -- Short-time delay short-circuit protection to I2t -- -- 1) 1) LT: Overload protection (Long time), L-tripping Thermal memory can be switched on/off ST: Short-time delay short-circuit protection (Short time), S-tripping INST: Instantaneous short-circuit protection (Instantaneous), I-tripping Instantaneous can be switched on/off ETU45WT ETU47WT -- -- N: Neutral conductor protection (N Neutral), N-tripping -- Neutral conductor protection can be switched on/off -- -- -- -- -- -- GF: Ground-fault protection, G-tripping Ground-fault characteristic can be switched to I 2t -- -- -- Load monitoring Ground-fault alarm -- -- Leading signal "L-tripping" -- -- Motor protection function Alphanumerical display Communication via CubicleBUS -- -- Communication via Modbus RTU -- -- Metering function -- -- Parameterization by rotary coding switches Remote parameterization of additional functions -- -- Provision for connecting to an external 24 V DC power supply -- -- Standard Optional -- Not available 1) Fixed 3WT 46 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.2 ETU35WT overcurrent release 6.2 ETU35WT overcurrent release 1) The reason for tripping is stored for at least two days provided that the overcurrent release was active for at least 20 minutes prior to tripping. NOTICE To protect the electrostatically-sensitive devices, the enclosed protective cap must be placed on the test socket. Before the protective cap is removed, the breakers must be connected to ground, and the operators must have the same potential. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 47 Electronic components 6.2 ETU35WT overcurrent release Protection functions LT: Overload protection (Long time), L-tripping (Page 61) ST: Short-time delay short-circuit release (Short time), S tripping (Page 62) INST: Instantaneous short-circuit release (Instantaneous), I-tripping (Page 63) Characteristic curves The diagram below only shows the setting ranges of the different parameters. Tolerance ranges are not taken into account here. L, S, I tripping operation With a one-pole load in the lowest rated current range, the response times of the short-circuit release can increase by approx. 10 % and the tripping times by approx. 15 % with respect to the characteristic curve. 3WT 48 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.3 ETU37WT overcurrent release 6.3 ETU37WT overcurrent release 1) The reason for tripping is stored for at least two days provided that the overcurrent release was active for at least 20 minutes prior to tripping. NOTICE To protect the electrostatically-sensitive devices, the enclosed protective cap must be placed on the test socket. Before the protective cap is removed, the breakers must be connected to ground, and the operators must have the same potential. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 49 Electronic components 6.3 ETU37WT overcurrent release Protection functions LT: Overload protection (Long time), L-tripping (Page 61) ST: Short-time delay short-circuit release (Short time), S tripping (Page 62) INST: Instantaneous short-circuit release (Instantaneous), I-tripping (Page 63) GF: Ground-fault protection (Ground-fault), G-tripping (Page 64) N: Neutral conductor protection (Neutral), N-tripping (Page 65) Characteristic curves The diagram below only shows the setting ranges of the different parameters. Tolerance ranges are not taken into account here. L, S, I, N tripping operation With a one-pole load in the lowest rated current range, the response times of the short-circuit release can increase by approx. 10 % and the tripping times by approx. 15 % with respect to the characteristic curve. 3WT 50 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.3 ETU37WT overcurrent release G tripping operation Due to the activation limits of 150 A (FSI) and 200 A (FSII), a ground fault response value of 100 A cannot be ensured with a one-phase load. In this case, the minimum response value is Ig = 300 A. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 51 Electronic components 6.4 ETU45WT overcurrent release 6.4 ETU45WT overcurrent release 1) The reason for tripping is stored for at least two days provided that the overcurrent release was active for at least 20 minutes prior to tripping. NOTICE To protect the electrostatically-sensitive devices, the enclosed protective cap must be placed on the test socket. Before the protective cap is removed, the breakers must be connected to ground, and the operators must have the same potential. 3WT 52 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.4 ETU45WT overcurrent release Protection functions LT: Overload protection (Long time), L-tripping (Page 61) ST: Short-time delay short-circuit release (Short time), S tripping (Page 62) INST: Instantaneous short-circuit release (Instantaneous), I-tripping (Page 63) N: Neutral conductor protection (Neutral), N-tripping (Page 65) Characteristic curves The diagram below only shows the setting ranges of the different parameters. Tolerance ranges are not taken into account here. L, N tripping operation 3WT Operating Instructions, 12/2018, 9239 0020 176 06 53 Electronic components 6.4 ETU45WT overcurrent release S tripping operation With a one-pole load in the lowest rated current range, the response times of the short-circuit release can increase by approx. 10 % and the tripping times by approx. 15 % with respect to the characteristic curve. I tripping operation With a one-pole load in the lowest rated current range, the response times of the short-circuit release can increase by approx. 10 % and the tripping times by approx. 15 % with respect to the characteristic curve. 3WT 54 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.5 ETU47WT overcurrent release 6.5 ETU47WT overcurrent release 1) The reason for tripping is stored for at least two days provided that the overcurrent release was active for at least 10 minutes prior to tripping. 2) The changeover switch is on the side of the ETU. NOTICE To protect the electrostatically-sensitive devices, the enclosed protective cap must be placed on the test socket. Before the protective cap is removed, the breakers must be connected to ground, and the operators must have the same potential. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 55 Electronic components 6.5 ETU47WT overcurrent release Protection functions LT: Overload protection (Long time), L-tripping (Page 61) ST: Short-time delay short-circuit release (Short time), S tripping (Page 62) INST: Instantaneous short-circuit release (Instantaneous), I-tripping (Page 63) GF: Ground-fault protection (Ground-fault), G-tripping (Page 64) N: Neutral conductor protection (Neutral), N-tripping (Page 65) L, N tripping operation 3WT 56 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.5 ETU47WT overcurrent release S tripping operation With a one-pole load in the lowest rated current range, the response times of the short-circuit release can increase by approx. 10 % and the tripping times by approx. 15 % with respect to the characteristic curve. I tripping operation With a one-pole load in the lowest rated current range, the response times of the short-circuit release can increase by approx. 10 % and the tripping times by approx. 15 % with respect to the characteristic curve. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 57 Electronic components 6.5 ETU47WT overcurrent release G tripping Due to the activation limits of 150 A (FSI) and 200 A (FSII), a ground fault response value of 100 A cannot be ensured with a one-phase load. In this case, the minimum response value is Ig = 300 A. 3WT 58 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.6 Indicators on the overcurrent release 6.6 Indicators on the overcurrent release The indicators provided depend on the overcurrent release type. Overcurrent release is activated I > Imin Imin: 150 A for frame size I 200 A for frame size II Overcurrent alarm Continuous light, if I IR Communication active Another CubicleBUS participant has been recognised and communication started. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 59 Electronic components 6.6 Indicators on the overcurrent release Protection function has tripped (overcurrent) * Indicator lights up when the "QUERY" button is pressed * Only one reason for tripping is displayed * Only the last reason for tripping is displayed T.U. ERROR LED 1st T.U. Error flashes: The protection function is restricted; the protection parameters are reset to the minimum values. Cause: * Overcurrent release defective 2nd T.U. Error lights up continuously: The protection function is not ensured. Cause: * Overcurrent release defective 3WT 60 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.7 Protection functions 6.7 Protection functions 6.7.1 Basic protection functions The protection functions of the overcurrent release are available without an additional auxiliary voltage. The required energy is supplied via current transformers integrated in the Circuit breaker. To evaluate the currents, the RMS value is calculated by the electronic components of the overcurrent release. The individual functions are parameterized by means of rotary coding switches. Note Tolerances for the setting currents L: tripping operations between 1.05 and 1.2 x IR S: - 0 %, + 20 % I: - 0 %, + 20 % G: - 0 %, + 20 % Tolerances for the tripping times L: - 20 %, + 0 % for I2t characteristic S: - 0 %, + 60 ms or - 0 %, + 10 % for characteristic with fixed delay time I: < 50 ms G: - 0 ms, + 60 ms or - 0 %, + 10 % for characteristic with fixed delay time 6.7.2 LT: Overload protection (Long time), L-tripping The setting value IR determines the maximum continuous current at which the Circuit breaker can operate without tripping. The time-lag class tR determines for how long an overload can be present without causing a trip. Setting values for IR ETU35WT ... ETU47WT IR = (0.4 / 0.45 / 0.5 / 0.55 / 0.6 / 0.65 / 0.7 / 0.8 / 0.9 / 1.0) x In Setting values for tR ETU35WT, ETU37WT tR = 10 s (at 6 x IR) ETU45WT, ETU47WT tR = 2 / 3.5 / 5.5 / 8 / 10 / 14 / 17 / 21 / 25 / 30 s (at 6 x IR) The tripping characteristic curve exhibits an I2t characteristic. When the motor protection function is active, a different tR setting applies (see next page). 3WT Operating Instructions, 12/2018, 9239 0020 176 06 61 Electronic components 6.7 Protection functions 6.7.3 ST: Short-time delay short-circuit release (Short time), S tripping With the overcurrent releases, tripping caused by a short-circuit current Isd can be delayed by tsd. This enables selectivity with respect to short-circuit protection in switchgear with more than one grading level. Setting values for Isd ETU35WT ... ETU47WT Isd = (1.25 / 1.5 / 2 / 2.5 / 3 / 4 / 6 / 8 / 10 / 12) x In Setting values for tsd ETU35WT, ETU37WT tsd = 0 / 0.02(M)1) / 0.1 / 0.2 / 0.3 / 0.4 s ETU45WT, ETU47WT tsd = 0.02(M)1) / 0.1 / 0.2 / 0.3 / 0.4 s; OFF 1) The delay time 0.02 s is not a grading time. In this setting, the motor protection function is activated. With the setting value tsd = 0 s, the ETU35WT and ETU37WT overcurrent releases can support instantaneous short-circuit protection with a variable response value that is lower than the fixed response value Ii. The "OFF" setting for the ETU45WT and ETU47WT overcurrent releases is used to deactivate short-time delay short-circuit protection. The ETU45WT and ETU47WT overcurrent releases support switching to a I2t characteristic. Motor protection function A special protection function for electromotive drives is activated with the Circuit breaker setting tsd= (0.02 s). This prevents the short-time delay short-circuit release from responding to the inrush peak of electric motors. At the same time, phase-failure protection is activated and the time constant for the internal, arithmetic simulation of the warming and cooling process is switched from plant protection to motor protection. ETU35WT and ETU37WT: When motor protection is active, the time-lag class is also set in such a way that, regardless of the default setting tR = 10 s, the tripping time for overload protection is 11.2 s @ 7 x IR, which means that it lies within the tolerance band of class 20 (6 < tp 20 s). ETU45WT and ETU47WT: When motor protection is active, the time-lag class is not influenced automatically. For reaching the tripping time for overload protection in the tolerance band of class 20 set the parameter tR = 17 s. 3WT 62 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.7 Protection functions Short-time characteristic The ETU45WT and ETU47WT overcurrent releases support switching from a constant delay time to an I2t characteristic. The delay time thus becomes dependent on the short-circuit current when the I2tsd value is constant, thereby improving selectivity with downstream fuses. In this case, the setting options for the time-lag class change as follows: Setting values for tsd ETU45WT, ETU47WT tsd = 0.1 / 0.2 / 0.3 / 0.4 s (at 12 x In) You can switch to the I2tsd-dependent characteristic using the tsd rotary coding switch by setting it to one of the white values. 6.7.4 INST: Instantaneous short-circuit release (Instantaneous), I-tripping When the setting value Ii is exceeded, this causes the Circuit breaker to trip instantaneously. Setting values for Ii ETU35WT, ETU37WT Ii 20 x In (fixed) MAX = 50 kA ETU45WT, ETU47WT OFF1) Ii = (1.5 / 2.2 / 3 / 4 / 6 / 8 / 10 / 12 x In) MAX = 0.8 x ICS 1) When the I tripping operation is deactivated, the breaking capacity of the Circuit breaker drops to ICS = ICW. With the ETU45WT and ETU47WT overcurrent releases, short-time delay (setting tsd = OFF) and instantaneous (Ii = OFF) short-circuit protection cannot be deactivated simultaneously. If the setting Ii = OFF is chosen when tsd = OFF, the system automatically corrects itself to Ii = 1.5 x In. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 63 Electronic components 6.7 Protection functions 6.7.5 GF: Ground-fault protection (Ground-fault), G-tripping If the overcurrent release is equipped with a ground fault protection function, this can protect consumers against excessive ground fault currents. Ground fault detection can be implemented in two ways: By means of vectorial summation of the currents of the external conductors and N conductor For ETU47WT: direct measurement of the ground fault current with a separate transformer 1200 A : 1 A In conjunction with the delay time setting tg, the response value Ig defines the disconnection of ground faults. Setting values for Ig ETU37WT, ETU47WT Ig = 100 / 300 / 600 / 900 / 1200 A Setting values for tg ETU37WT, ETU47WT tg = 0.1 / 0.2 / 0.3 / 0.4 / 0.5 s The ETU47WT overcurrent release supports switching to a I2t characteristic. Ground-fault characteristic Ground fault protection for the ETU47WT overcurrent release supports switching from a constant delay time to an I2t characteristic. This results in a tripping characteristic with a current-dependent delay time when the I2tg value is constant and, in switchgear with more than one grading level, improves selectivity with respect to ground fault protection. Setting values for tg ETU47WT tg = 0.1 / 0.2 / 0.3 / 0.4 / 0.5 (at 3 x Ig) You can switch to the I2tg-dependent characteristic using the tg rotary coding switch (ETU47WT) by setting it to one of the white values. 3WT 64 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.7 Protection functions 6.7.6 N: Neutral conductor protection (Neutral), N-tripping The ETU37WT ... ETU47WT overcurrent releases allow the neutral conductor to be protected against overload. A current transformer for the neutral conductor (which can be retrofitted if necessary) is required for this purpose. With respect to tripping, the same time-lag class tR as that for the overload trip applies. Setting values for IN ETU37WT IN = In; OFF ETU45WT, ETU47WT IN = (0.5 / 1.0) x In; OFF 3WT Operating Instructions, 12/2018, 9239 0020 176 06 65 Electronic components 6.8 Additional functions 6.8 Additional functions 6.8.1 Phase-failure protection When the Circuit breaker setting is tsd = (0.02s), phase-failure protection is activated. If the operational current on the phase with the lowest load is 50% less than the operational current of the phase with the highest load when phase-failure protection is active, the setting value IR is automatically reduced to 80%. If the three phase currents do not differ by more than 50% with respect to each other, the setting value IR applies. 6.8.2 Thermal memory (can be switched on/off) The ETU45WT and ETU47WT overcurrent releases enable the internal, arithmetic simulation of the thermal processes in downstream plants and consumers to continue even when the Circuit breaker is open. This helps ensure effective protection against thermal overload even with frequent closing/opening operations and fluctuating loads. Response in overload range: Above 1.125 x IR: the system heats up strictly in accordance with the characteristic curve. Response in the rated current range: Below 1.125 x IR: no heating. The system cools down in accordance with the exponential function with a time constant of 18 x tR for plant protection or 10 x tR for motor protection. Response when _ParaSwitchTherm = ON: When the thermal memory is switched on, the thermal history is taken into account: After a tripping operation, the thermal memories of the phases are defaulted with the equivalent of heat of the warmest phase reduced to 90% (enables reactivation). The system cools down in accordance with the exponential function with a time constant of 18 x tR for plant protection or 10 x tR for motor protection. Upon reactivation, the cooling during the deactivation phase is simulated by the software over max. 60 minutes. Response when _ParaSwitchTherm = OFF: When the thermal memory is switched off, the thermal history is not taken into account: Upon activation, the release always starts with heat memory ZERO. After a tripping operation, the thermal memories of the phases are set to ZERO. The thermal memory can be activated by means of a slide switch (ETU45WT, ETU47WT). 3WT 66 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.9 Menus on the ETU35WT ETU37WT display 6.9 Menus on the ETU35WT ETU37WT display When you press the menu button briefly (< 1 s), you can switch from one menu to another. The following consecutive menu displays can be selected: Current in phase L1 Current in phase L2 Current in phase L3 Current in neutral conductor (for ETU37WT only) Ground fault current (for ETU37WT only) Current of phase with highest load of L1, L2, L3, and N 3WT Operating Instructions, 12/2018, 9239 0020 176 06 67 Electronic components 6.9 Menus on the ETU35WT ETU37WT display The reason for tripping is displayed during a tripping operation. LT tripping operation ST tripping operation INST tripping operation N tripping operation (for ETU37WT only) Ground-fault tripping (for ETU37WT only) 3WT 68 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.10 Alphanumeric display of ETU45WT and ETU47WT 6.10 Alphanumeric display of ETU45WT and ETU47WT Design 6.10.1 Screen (4 lines with 20 characters each) Up-key Down-key Modifying the displays inclination At the factory, the alphanumeric display is installed with a downward inclination. However, it can be turned by 180; the display is then inclined upwards. DANGER Hazardous voltage! Will cause death, serious personal injury, or equipment / property damage. Disconnect power before working on this equipment. - Switch off and discharge the storage spring - Switch off external 24 V DC voltage supply, if applicable - Remove trip unit sealing cap 3WT Operating Instructions, 12/2018, 9239 0020 176 06 69 Electronic components 6.10 Alphanumeric display of ETU45WT and ETU47WT Removing the display Installing the display turned by 180 and latching it tight Switch on external 24 V DC voltage supply, if applicable 3WT 70 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.10 Alphanumeric display of ETU45WT and ETU47WT 6.10.2 Menu structure After the supply voltage has been applied, the display changes from "Power-up screen" to "Autoscroll" mode after about 5 s. Thereafter, further modes can be accessed by means of the two buttons. Overview "Autoscroll" mode During normal operation, the display is in "Autoscroll" mode To access Autoscroll mode, press the following button(s) In mode "Fixed screen display" In mode "Tripping counter reset" In mode "Contrast setting" In mode "Parameter setting" Do not press any button for 10 seconds In mode "Tripping info" In this mode, the display automatically changes to the next screen every 5 seconds. If there is no metering module available, the display changes continuously between the screens 1 and 2. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 71 Electronic components 6.10 Alphanumeric display of ETU45WT and ETU47WT If there is a metering module available, a total of five screens are displayed in "Autoscroll" mode. Screens displayed in the "Autoscroll" mode without metering module Current I1 Current I2 Current I3 Current IN Ground-fault current Ig (A value is only displayed if an ground-fault protection module is fitted.) with metering module installed, additionally Active power P Apparent power S Reactive power Q Power factor Voltage U12 Voltage U23 Voltage U31 Energy (positive direction) Energy (negative direction) Present direction of energy flow Frequency NOTICE The data to be displayed are updated every time the screen page is set up again. No updates take place when a screen page is being displayed. Button functions in the "Autoscroll" mode Display is frozen Switchover to mode "Fixed screen display" Change to mode "Parameter setting" Change to mode "Contrast setting" 3WT 72 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.10 Alphanumeric display of ETU45WT and ETU47WT Mode "Fixed screen display" To access "Fixed screen display" mode, press the following button: In "Autoscroll" mode In this mode, maintenance information is provided with the number of Circuit breaker trips and switching operations as well as with maintenance instructions. The information displayed depends on the number of Circuit breaker trips operations. Number of tripping operations Number of switching operations Number of tripping operations Number of switching operations Maintenance instructions Button functions in mode "Fixed screen display" Change to next higher screen level Change to "Autoscroll" mode If screen 6 is displayed Change to mode "Tripping counter reset" Submode "Tripping counter reset" This mode offers the possibility to reset the counter for the trips and the switching operations to zero. CAUTION If the counter is reset without contact maintenance having been performed, the maintenance information displayed will not correspond to the actual condition of the contacts. This can destroy the contacts. To access "Tripping counter reset mode", press the following button(s) In the mode "Fixed screen display", when screen 6 is displayed 3WT Operating Instructions, 12/2018, 9239 0020 176 06 73 Electronic components 6.10 Alphanumeric display of ETU45WT and ETU47WT Screens displayed in mode "Tripping counter reset" This screen is used for safety queries. Reset the counter after contact maintenance only! Counter reset for trips and switching operations confirmed. Button functions in mode "Tripping counter reset" If screen 1 is displayed Cancelling, no counter reset to zero Change to "Autoscroll" mode Counter reset to zero Change to screen 2 If screen 2 is displayed Change to "Autoscroll" mode Mode "parameter setting" CAUTION Adjust parameters only when the Circuit breaker is switched off. If the parameters are modified with the Circuit breaker switched on, this can trip the Circuit breaker unintentionally. In this mode, the following parameters can be adjusted: - load shedding - load restore - delay time for load shedding/load restore - language setting for display To access "Parameter setting" mode, press the following button(s): In "Autoscroll" mode 3WT 74 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.10 Alphanumeric display of ETU45WT and ETU47WT Screens displayed in the mode "Parameter setting" Setting Load shedding Setting Load restore Setting Delay time Load shedding/load restore Setting Display language XXXX may be ENGL for english or DEUT for german (Remark: this is not available for Chinese version.) Parameter settings are being changed, switches to "Autoscroll" mode after 10 seconds NOTICE When screen 1, 2, 3 or 4 is displayed and no key is pressed within 10 seconds, mode "Parameter setting" is canceled. Any parameter changes performed are not accepted. Display switches back to "Autoscroll" mode Button functions in mode "Parameter setting" Increases the set value Reduces the set value Confirms the set value Switches to the next screen 3WT Operating Instructions, 12/2018, 9239 0020 176 06 75 Electronic components 6.10 Alphanumeric display of ETU45WT and ETU47WT Mode "Contrast setting" In this mode, the contrast of the display can be adjusted. To access "Contrast setting" mode, press the following button(s): In "Autoscroll" mode Screens displayed in the mode "Contrast setting" Contrast setting The longer the bar, the higher the contrast Button functions in mode "Contrast setting" Increases the contrast Reduces the contrast Accepts the contrast, switch to the "Autoscroll" mode Screen "Tripping info" In this mode, there is an automatic change as soon as there is a tripping, provided that an external 24 V DC voltage supply has been connected. Screens displayed in the mode "Tripping info" Tripping type Phase affected XX may be: L, S, I, G, N YY may be: L1, L2, L3, N Button functions in the mode "Tripping info" Display of maintenance instructions If pressed again:Return to the mode "Tripping info" Press CLEAR-button Switches to "Autoscroll" mode 3WT 76 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.10 Alphanumeric display of ETU45WT and ETU47WT Screen "Display parameter changes" The display automatically switches to this mode when a parameter has been changed via the rotary coding switches, provided an external 24 V DC voltage supply has been connected. Screens displayed in mode "Display parameter changes" Display of the changed value N Technical data with values and units that can be displayed in screen 1 Changed data Displayed values Unit LT pickup value in primary amperes A ST pickup value in primary amperes A IN pickup value in primary amperes A GF pickup value in primary amperes A GF alarm pickup value in primary amperes A GF delay: 100 200 300 400 500 ms GF I2t delay: 100 200 300 400 500 ms LT I2t delay: 2 3.5 5.5 8 10 14 17 21 35 30 s ST delay: 20 100 200 300 400 ms 100 200 300 400 ms ON OFF .. IR Current for overload tripping ISD Current for short-time delayed short-circuit tripping Ii Current for instantaneous short-circuit tripping Ig Current for ground-fault protection tripping (this is only displayed if there is an ground-fault protection module available) Ig alarm Response current for ground-fault protection alarm indicator (this is only displayed if a ground-fault protection module is installed) tg Delay time for ground-fault protection (this is only displayed if a ground-fault protection module is installed) I2 tg Inverse-time delay (I2t-dependent) of ground-fault protection (this is only displayed if a ground-fault protection module is installed) I2 tR Inverse-time delay (I2t-dependent) for overload tripping tSD Delay time of short-circuit tripping I2tSD Inverse-time delay (I2t-dependent) for short-circuit tripping th mem Indicates whether thermal memory is on / off Button functions in mode "Display parameter changes" The changed value is displayed for 4 seconds. The display then switches back to the previous mode. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 77 Electronic components 6.11 Communication 6.11 Communication The figure below shows how COM16WT contacts for ON and OFF must be wired to allow switching the beaker on/off. This figure only applies for ON and OFF solenoids with DC 24 V! Wiring of COM16WT at DC 24 V CAUTION The external power supply, used for electronic components, shall not be used to supply the motor operating mechanism! 3WT 78 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.11 Communication The figure below shows the wiring if contacts are installed with voltages not equal to DC 24 V. Coupling relays must be used. If F1 is not used for switching off, alternative F2 can be used. Wiring of COM16WT at voltage not equal to DC 24 V 3WT Operating Instructions, 12/2018, 9239 0020 176 06 79 Electronic components 6.12 Breaker Status Sensor (BSSWT) 6.12 Breaker Status Sensor (BSSWT) For collecting Circuit breaker status information via signaling -switches and transmitting these data to the CubicleBUS. BSSWT module Microswitches connecting cable for S40, S41, S44 Microswitches connecting cable for S43, S45 BSSWT connecting cable for CubicleBUS 3WT 80 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.12 Breaker Status Sensor (BSSWT) Signaling switches for BSSWT Signaling switch spring charged S41 Signaling switch ready-to-close S40 Trip signaling switch S45 Signaling switch connected position S46 Signaling switch disconnected position S48 Signaling switch S43 auxiliary release (F2) Signaling switch S43 auxiliary release (F1/F3/F8) Signaling switch ON-OFF position S44 Signaling switch test position S47 Note Signaling switch S43 for auxiliary release (F2) only available when there is no auxiliary release F1/F3/F8 existed. Article No. for spare part Description Article No. BSSWT module 3WT9844-0AT00 3WT Operating Instructions, 12/2018, 9239 0020 176 06 81 Electronic components 6.13 COM16WT module 6.13 COM16WT module Interface adapter for: converting CubicleBUS signals to Modbus signals and vice versa on draw-out Circuit breakers: detecting the Circuit breaker position in the guide frame with the signaling switches S46, S47 and S48, and emitting the corresponding signals on the CubicleBUS and the Modbus. providing special functions by additional inputs and outputs (e.g. to control the Circuit breaker and for parameterization) Further Information is given in the manual "3WT Circuit breakers with communication capability - Modbus". Note This is a product for environment A. In residential environment this device can cause unwanted radio interferences. In this case the user can be put in charge to perform special measures. View Connection terminals for additional inputs and outputs to provide special functions SUB-D plug, 9-pole, for Modbus connection CubicleBUS LED Modbus-LED Connecting cables to hand plug X300 CubicleBUS connection for connecting external CubicleBUS-modules or for the terminating resistor 3WT 82 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.13 COM16WT module Indications LED Indication Modbus Off No voltage at COM16WT Green Modbus communication operating Red Bus fault or bus not responding Off No CubicleBUS-modules found Green CubicleBUS communication operating Green flashing CubicleBUS participant found, but CubicleBUS connection inside Circuit breaker disturbed Red CubicleBUS faulty CubicleBUS Significance Fitting COM16WT module on the guide frame Switch off open button and discharge the storage spring. Pull the breaker into maintenance position See chapter Preparatory work (Page 102) S46, S47 and S48: Signaling switches for detecting the Circuit breaker position in the guide frame and transfer to Modbus and CubicleBUS. Connecting wires See chapter Overall circuit diagram (Page 247) Note If necessary missing auxiliary terminals may be retrofitted (receptacle, auxiliary connectors and sliding contact module for guide frames). - See chapter Connecting the auxiliary conductor (Page 40) 3WT Operating Instructions, 12/2018, 9239 0020 176 06 83 Electronic components 6.13 COM16WT module Hand plug X300 Connecting cable to first external CubicleBUS-module or terminating resistor Connecting cable to hand plug X300 Designation Assignment Terminal 314 CubicleBUS - X300.14 313 CubicleBUS + X300.13 312 24 V DC + X300.12 311 24 V DC GND X300.11 Connections for additional inputs and outputs Further information about the application of these inputs and outputs is given in the manual "3WT Circuit breakers with communication capability - Modbus". Article No. for spare part Description Article No. COM16WT 3WT9844-1AT00 3WT 84 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.14 Metering function 6.14 Metering function Trip unit ETU45WT and ETU47WT can be equipped with a metering function. In addition to the values for the currents, the metering function provides data on voltages, powers, energy values, power factors and frequency through the CubicleBUS, for further processing. This data can be shown on the display of the trip unit, transmitted to the Modbus through the COM16WT module and transferred to the outputs of external CubicleBUS-modules. Based on these data, conclusions can be drawn about the condition of the power system. To use the metering function an external 24 V auxiliary voltage supply is required. The measurement accuracy of the voltage values can only be guaranteed by connecting the protective earth (PE) with the 24 V-GND ("-") of the external power supply voltage of the circuit breaker. The connection should be made directly on the output of the power supply and with at minimum 1.5 mm2 of cable. Furthermore, it is necessary to connect the N-conductor (at 3-poles breaker) for a proper voltage measurement. Please see chapter External voltage supply (Page 88) Measured parameter Accuracy 1) Currents IL1, IL2, IL3, IN 1% Ground-fault current Ig (Measurement with external ground-fault transformer) 5% Line-to-line voltage UL12, UL23, UL31 1% Neutral point voltages UL1N, UL2N, UL3N 1% Present average of line-to-line voltage UavgD 1% Present average of neutral point voltages UavgY 1% Apparent power SL1, SL2, SL3 2% Total apparent power 2% Active power PL1, PL2, PL3 3 % @ cos > 0.6 Total active power 3 % @ cos > 0.6 Reactive power QL1, QL2, QL3 4 % @ cos > 0.6 Total reactive power 4 % @ cos > 0.6 Power factors cosL1, cosL2, cosL3, 0.04 Power factor total cosavg 0.04 Long-time average of currents IL1, IL2, IL3 1% Long-time average of 3-phase current 1% Long-time average of active power in L1, L2, L3 3 % @ cos > 0.6 Long-time average of active power 3-phase 3 % @ cos > 0.6 Long-time average of apparent power in L1, L2, L3 2% Long-time average of apparent power 3-phase 2% Long-time average of reactive power 3-phase 4 % @ cos > 0.6 Energy consumed 3% Energy delivered 3% Reactive energy consumed 4% 3WT Operating Instructions, 12/2018, 9239 0020 176 06 85 Electronic components 6.14 Metering function Reactive energy delivered 4% Frequency 0.1 Hz Distortion factor of current and voltage 3 % , up to 29th harmonic Phase unbalance of current and voltage 2) 1% 1) Definition of accuracy: ( x % of measuring range + 2 LSD (Least Significant Digit) for one year after calibration Reference condition: Input current I: In max 1% Input voltage U: Un 1% Frequency f: 50 Hz Power factor: cos = 1 Waveform: sine, harmonic distortion < 5% symmetrical load Ambient temperature: 35 C 5 C Auxiliary voltage: DC 24 V according DIN 19240 / EN 61131 Warm-up time: 2 hours External fields: no Metering range: Current: 0.2 ... 1.2 In max Voltage: 0.8 ... 1.2 Un 2) IEC-Definition: Ratio of the largest difference between the phases and the most heavily loaded phase. Metering function In addition to the basic functions, the metering function offers: two independent waveform memories harmonic analysis The two independent waveform memories can be used to analyse the current and voltage values at the time of the event. If the waveform memories are programmed to "recording" (standard setting), continuous recording takes place until a previously defined event occurs. Then, the recording is stopped, and the current or voltage waveforms at the time of the event can be observed through a visual display (graphical LCD, laptop or PC). The time window is one second; the resolution is 1649 values/second. The values that can be selected for one of the waveform memories are: Settings for waveform buffers memory Currents IL1, IL2, IL3, ILN, Ig Voltages UL1, UL2, UL3 The waveform memories can also be started or stopped individually through the communication channels (Modbus, CubicleBUS). The waveform memories can be parameterized via: the test socket with the TD400 the Modbus with a PC and the PC-software "powerconfig" 3WT 86 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.14 Metering function Switchgear insulation test The following applies for switchgears with more than 4 circuit breakers with internal voltage tap: prior to the insulation test of the switchgear the internal voltage converters must each be disconnected from the metering function. WARNING Always de-energize and ground equipment before working on this equipment. - Switch off and discharge the storage spring - Move draw-out circuit breaker to maintenance position - Remove front panel - Disconnect X50 at the metering function After the insulation test the connecting cable at X50 has to be connected again. - Connect plug X50 to meterring function again - Attach front panel Then check the measured voltage values of the metering function by connecting line voltage in the switchgear. Article No. for spare part Description Article No. Metering function 3WT9844-5AT00 3WT Operating Instructions, 12/2018, 9239 0020 176 06 87 Electronic components 6.15 External voltage supply 6.15 External voltage supply The basic functions of the electronic overcurrent releases do not require auxiliary power supply. To use the extended functions of the overcurrent releases ETU45WT requiring data exchange through the CubicleBUS, an external 24 V DC voltage supply must be connected. Connection Connection to hand plug X300. Requirements The external voltage supply with 24 V DC must comply at least with the requirements of DIN 19240 / EN 61131. To prevent the 3WT system from EMC interferences, it is recommended to use a power supply of protection class II. To supply power to a circuit breaker equipped with the maximum number of external CubicleBUS-modules possible, the Siemens power supply unit mentioned below can be used. If a second circuit breaker must be fed, a second power supply unit will be necessary, too. When using voltage supply units from other manufacturers, the following conditions must be fulfilled: Primary-switched-mode power supply unit 24 V DC, 3 % EMC according for 24 V power supply: IEC61000-4-4: 4 kV on main side; IEC61000-4-5: 4 kV line-to-earth, 2 kV line-to-line. 3WT 88 Operating Instructions, 12/2018, 9239 0020 176 06 Electronic components 6.15 External voltage supply Article number Power supply Article No. LOGO! Power, Input: AC 100-240 V, output 24 V DC / 4 A 6EP3333-6SB00-0AY0 CAUTION The external power supply, used for electronic components, shall not be used to supply the motor operating mechanism! 3WT Operating Instructions, 12/2018, 9239 0020 176 06 89 Electronic components 6.15 External voltage supply 3WT 90 Operating Instructions, 12/2018, 9239 0020 176 06 Auxiliary release and auxiliary switches 7 WARNING May result in death or serious injury. Discharge storage spring before removing barriers / covers. - See chapter Preparatory work (Page 102) 7.1 Overview Mounting location Closing coil Y1 2nd shunt release F2 1st shunt release F1 or undervoltage release "r" F3 or undervoltage release "rc" F8 1st auxiliary switches 2NO + 2NC 2nd auxiliary switches 2CO or 2nd auxiliary switches 2NO + 2NC or 2nd auxiliary switches 3NO + 1NC or 2nd auxiliary switches 4NO See chapter Terminal diagrams (Page 250) 3WT Operating Instructions, 12/2018, 9239 0020 176 06 91 Auxiliary release and auxiliary switches 7.1 Overview Article No. Description Article No. Closing coil Y1; 2nd shunt release F2; 1st shunt release F1 Undervoltage release "r" F3 Undervoltage release "rc" F8 2nd auxiliary switches 2nd DC 24 V 3WT9851-1JB00 DC 110 ... 125 V; AC 50/60 Hz 110 ... 127 V 3WT9851-1JH00 DC 220 ... 250 V; AC 50/60 Hz 220 ... 240 V 3WT9851-1JK00 DC 24 V 3WT9853-1JB00 DC 110 ... 125 V; AC 50/60 Hz 110 ... 127 V 3WT9853-1JH00 DC 220 ... 250 V; AC 50/60 Hz 220 ... 240 V 3WT9853-1JK00 AC 50/60 Hz 380 ... 415 V 3WT9853-1JM00 DC 110 ... 125 V; AC 50/60 Hz 110 ... 127 V 3WT9855-1JH00 DC 220 ... 250 V; AC 50/60 Hz 220 ... 240 V 3WT9855-1JK00 AC 50/60 Hz 380 ... 415 V 3WT9855-1JM00 2CO 3WT9816-1CE00 auxiliary switches 2NO + 2NC 3WT9816-1CD00 2nd auxiliary switches 3NO +1NC 3WT9816-1CF00 2nd 3WT9816-1CG00 auxiliary switches 4NO 3WT 92 Operating Instructions, 12/2018, 9239 0020 176 06 Auxiliary release and auxiliary switches 7.2 Setting the delay time of the undervoltage release 7.2 Setting the delay time of the undervoltage release Preparatory work Opening the Circuit breaker and discharging the stored energy springs Disconnect auxiliary circuits Pull Circuit breaker to maintenance position and remove See chapter Preparatory work (Page 102) Removing the operating device See chapter Removing the operating device (Page 127) Setting Undervoltage release "r" F3 1. Remove the cap. 2. Set the jumper. 3. Re-attach the cap. Undervoltage release "rc" F8 S1 Select the range. S2 Set the delay time td. Final work - Install front panel - Fit auxiliary connectors - Connect wires to auxiliary connector - Move the draw-out Circuit breaker into the test position 3WT Operating Instructions, 12/2018, 9239 0020 176 06 93 Auxiliary release and auxiliary switches 7.2 Setting the delay time of the undervoltage release 3WT 94 Operating Instructions, 12/2018, 9239 0020 176 06 8 Commissioning 8.1 Charging the stored-energy spring mechanism WARNING Can cause injury. When the Circuit breaker has been removed from the system with an unloaded storedenergy spring mechanism, it must be placed on a stable surface (e.g. on a workbench during maintenance). 8.1.1 Manual charging Pump movements 5x Stored-energy spring mechanism charged Note To charge the stored-energy spring mechanism, grasp the charging lever securely and move it as far as it will go. Make sure that each movement is as smooth as possible. The fifth stroke must be made as far and as smoothly as the previous four strokes, even though the force required to actuate the lever increases considerably. Once the stored-energy spring mechanism has been fully charged, the charging lever can be moved without resistance. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 95 Commissioning 8.1 Charging the stored-energy spring mechanism F Actuating force n Number of strokes (1) Stored-energy spring mechanism charged 8.1.2 By means of motorized operating mechanism This occurs automatically once the control voltage has been applied (the motorized operating mechanism is shut down as soon as charging is complete). Stored-energy spring mechanism charged Article No. Description Article No. Motorized operating mechanism, DC 24 V 3WT9832-1JB00 Motorized operating mechanism, DC 110 ... 125 V; AC 50/60 Hz 110 ... 127 V 3WT9832-1JH00 Motorized operating mechanism, DC 220 ... 250 V; AC 50/60 Hz 220 ... 240 V 3WT9832-1JK00 3WT 96 Operating Instructions, 12/2018, 9239 0020 176 06 Commissioning 8.2 Preparing for operation 8.2 Preparing for operation Commissioning checklist Arc chutes attached Circuit breaker is OFF Overcurrent release is installed and RESET pressed Operating values on the overcurrent release are set Auxiliary and control voltages are applied (for rated values, see the rating plate) The main conducting paths are de-energized Cabinet door is closed Stored-energy spring mechanism is charged Withdrawable Circuit breaker in connected position Conditions (depending on version) Undervoltage release Excited Shunt release Not excited Electrical closing lockout Not excited Mechanical reclosing lockout Set to RESET Electrical interlocking for closing solenoid Canceled Interlock Not active Display: "ready to close" Note 1. The Circuit breaker must only be closed when the overcurrent release has been installed (with the exception of non-automatic Circuit breakers). 2. Never remove overcurrent releases under load since this can damage the overcurrent release / current transformer. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 97 Commissioning 8.3 Closing operation 8.3 Closing operation Mechanical closing Switching position indicator 8.4 Store status indicator Opening operation On the Circuit breaker Overcurrent Switching position indicator 3WT 98 Operating Instructions, 12/2018, 9239 0020 176 06 Commissioning 8.5 Recommissioning after opening operation by means of overcurrent release 8.5 Recommissioning after opening operation by means of overcurrent release Ready-to-close indicator = (not ready) Identify and rectify the cause. After short-circuit trip, check the Circuit breaker for any damage. Open the transparent cover and reset the reclosing lockout. Press RESET for tripped signaling, commission as described above. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 99 9 Maintenance DANGER Hazardous voltage During operation, certain Circuit breaker components are subject to hazardous voltages or spring force. If you come into contact with live components, this can result in death or serious injury. Maintenance must only be carried out by authorized personnel. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 101 Maintenance 9.1 Preparatory work 9.1 Preparatory work Opening the Circuit breaker and discharging the stored-energy spring mechanism Possible status: Circuit breaker CLOSED Actuating sequence: 1. Open Stored-energy spring mechanism discharged Open Circuit breaker 1. Closed Stored-energy spring mechanism charged 2. Open Circuit breaker CLOSED 1. Open Stored-energy spring mechanism charged 2. Closed 3. Open Indications final status: 3WT 102 Operating Instructions, 12/2018, 9239 0020 176 06 Maintenance 9.1 Preparatory work Disconnect auxiliary circuits Fixed-mounted Circuit breaker Remove the manual connector and take out the Circuit breaker. To remove the manual connector(s), push them up. Make sure that the connected cables are not bent. Withdrawable Circuit breaker Racking to the disconnection position 3WT Operating Instructions, 12/2018, 9239 0020 176 06 103 Maintenance 9.2 Checking the arc chutes Pull Circuit breaker to maintenance position and remove 1. Set the Circuit breaker to the maintenance position 2. Remove the Circuit breaker. Set the Circuit breaker to the maintenance position and remove from the system. 9.2 Checking the arc chutes Every 12 months or after 1000 switching operations After serious shutdowns Remove the arc chutes. If severe wear and tear is present (e.g. burns on the arc splitters), replace the arc chutes. 3WT 104 Operating Instructions, 12/2018, 9239 0020 176 06 Maintenance 9.3 Checking the wear on the contacts 9.3 Checking the wear on the contacts Every 12 months or after 1000 switching operations After serious shutdowns Remove the arc chutes. 9.4 Close the Circuit breaker. Carry out a visual check of the open Circuit breaker. Replacing the conducting paths DANGER Hazardous voltage! Hazardous stored-energy spring mechanism Before starting work, disconnect the device from the supply and ensure that it cannot be switched on. Only carry out work on the device when the Circuit breaker is open and the stored-energy spring mechanism is discharged. Failure to do so can result in death, severe injury, or substantial material damage. The devices must be installed and mounted by authorized personnel only. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 105 Maintenance 9.4 Replacing the conducting paths Check the contents of the packaging Frame size I Frame size II Contact carrier, cpl. 1x Conducting path, fixed 1x Coupling bolt 1x Cylinder-head screw M6 x 30 DIN 912 4x Strain washer 6 DIN 6796 4x Contact carrier, cpl. 1x Conducting path, fixed 1x Coupling bolt 1x Cylinder-head screw M8 x 50 DIN 912 4x Strain washer 8 DIN 6796 4x Note: The shape of the connection bars on the contact carriers and and on the conducting paths and varies depending on the version you have ordered. The installation/mounting procedure is the same for all versions. Unscrew arc chutes Remove the fixing screws for the arc chutes . Lift off the arc chutes. 3WT 106 Operating Instructions, 12/2018, 9239 0020 176 06 Maintenance 9.4 Replacing the conducting paths Disconnecting the contact carriers (frame sizes I and II) Loosen the locking bolt (do not remove completely). Press out the coupling bolt or by means of a screwdriver (as shown). Note: With frame size II, the locking bolt with cover must be removed completely. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 107 Maintenance 9.4 Replacing the conducting paths Removing the rear housing panel Frame size I Frame size II Frame sizes I and II Remove the cylinder-head screws . Unscrew the countersunk head screws on the support bracket of the rear panel . Loosen the countersunk head screws of the support bracket (do not remove completely). Open the rear panel of the Circuit breaker (as shown). 3WT 108 Operating Instructions, 12/2018, 9239 0020 176 06 Maintenance 9.4 Replacing the conducting paths Removing the insulation (frame size I) Lift the contact carrier up. Pull the insulation forward (push the side walls of the insulation outward slightly). Removing the contact carriers (frame sizes I and II) Lift the contact carrier or up. Unscrew the cylinder-head screw or with strain washer or . Remove the contact carrier or from the rear housing panel (as shown). 3WT Operating Instructions, 12/2018, 9239 0020 176 06 109 Maintenance 9.4 Replacing the conducting paths Removing the conducting paths (frame sizes I and II) Unscrew the cylinder-head screws or with strain washers or . Remove the conducting path or from the rear housing panel (as shown). 3WT 110 Operating Instructions, 12/2018, 9239 0020 176 06 Maintenance 9.4 Replacing the conducting paths Installing the conducting path (frame sizes I and II) Push the conducting path or into the rear housing panel from above. Push the spacer or into the rear housing panel from below as far as it will go. Secure the conducting path or and spacer or with cylinder-head screws or and strain washers or to the rear housing panel (tighten by hand only). Note: The spacer (19 or 20) is not required for versions other than 3WT9821-0AA00. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 111 Maintenance 9.4 Replacing the conducting paths Attaching the spacer (frame size I) Attach the spacer to the contact carrier (as shown). Note: The spacer is not required for versions other than 3WT9821-0AA00. Installing the contact carriers (frame sizes I and II) Insert the contact carrier or (if necessary, with spacer ) into the rear housing panel and secure with cylinder-head screws or and strain washers or (tightening torque: 8 1 Nm ; 12 1 Nm ) 3WT 112 Operating Instructions, 12/2018, 9239 0020 176 06 Maintenance 9.4 Replacing the conducting paths Installing the insulation (frame size I) Lift the contact carrier up. Attach the insulation to the contact carrier (must audibly engage). 3WT Operating Instructions, 12/2018, 9239 0020 176 06 113 Maintenance 9.4 Replacing the conducting paths Removing the rear housing panel Frame size I Frame size II Rear housing panel: frame sizes I and II Place the rear housing panel up against the housing. that you do not trap any cables. When doing so, make sure Secure the support bracket and housing or rear housing panel by means of countersunk head screws (tightening torque: 6 1 Nm). Secure the cylinder-head screws (tightening torque: 10 1 Nm). 3WT 114 Operating Instructions, 12/2018, 9239 0020 176 06 Maintenance 9.4 Replacing the conducting paths Connecting the contact carriers (frame sizes I and II) Press the contact carrier or toward the coupling clips (as shown). When doing fully accommodate the contact carrier or . so, make sure that the coupling clips Insert the coupling bolt as shown ( or ) by means of a screwdriver (to the right). Secure the coupling bolt or by means of a locking bolt (tightening torque: 2 0.3 Nm). Note: With frame size II as of 09/95, the locking bolt (with cover) must be screwed in again (tightening torque: 2 0.3 Nm). 3WT Operating Instructions, 12/2018, 9239 0020 176 06 115 Maintenance 9.4 Replacing the conducting paths Final installation of the conducting path (frame sizes I and II) CAUTION Hazardous stored-energy spring mechanism Charge the stored-energy spring mechanism and close the Circuit breaker. Close the Circuit breaker, making sure that you take the necessary precautions. Secure the cylinder-head screws or with strain washers or (tightening torque: frame size I 8 1 Nm, frame size II 12 1 Nm) 3WT 116 Operating Instructions, 12/2018, 9239 0020 176 06 Maintenance 9.4 Replacing the conducting paths Attaching the arc chutes Attach the arc chutes . Secure the arc chutes by means of fixing screws . Functional test Mechanical functional test Charge the stored-energy spring mechanism manually. Close. Open. Check the indicator for wear on the contacts again. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 117 Maintenance 9.5 Internal self-test of the overcurrent release function 9.5 Internal self-test of the overcurrent release function For commissioning and checking the function of the device. Requirements The release is activated by means of: operational current The current is not in the overload range for indicators, see (Indicators on the overcurrent release (Page 59)) Internal self-test of Circuit breaker without tripping operation Normal operation of the Circuit breaker is not affected. The test can be terminated at any point with "CLEAR". Start the self-test. 3WT 118 Operating Instructions, 12/2018, 9239 0020 176 06 Maintenance 9.5 Internal self-test of the overcurrent release function Self-test procedure 3WT Operating Instructions, 12/2018, 9239 0020 176 06 119 Maintenance 9.6 Internal self-test of Circuit breaker with tripping operation 9.6 Internal self-test of Circuit breaker with tripping operation Note The internal self-test with tripping operation must only be carried out when the downstream circuits have been shut down. The test can be terminated at any point with "CLEAR". Start the self-test. 3WT 120 Operating Instructions, 12/2018, 9239 0020 176 06 Maintenance 9.6 Internal self-test of Circuit breaker with tripping operation Self-test procedure See also Recommissioning after opening operation by means of overcurrent release (Page 99) 3WT Operating Instructions, 12/2018, 9239 0020 176 06 121 Maintenance 9.7 Replacing the overcurrent release 9.7 Replacing the overcurrent release Removal See Removing the operating device (Page 127) NOTICE Retrofitting for the overcurrent release is only permissible by Siemens customer service specialists. Removal Note the current overcurrent release settings. Remove the nuts and washers. Note Carefully pull the release forward. Make sure that you do not damage the cable harness. 3WT 122 Operating Instructions, 12/2018, 9239 0020 176 06 Maintenance 9.7 Replacing the overcurrent release Remove the connector (press the release buttons). Installation Remove the connector. Secure the release. Installation See Installing the operating device (Page 128) 3WT Operating Instructions, 12/2018, 9239 0020 176 06 123 10 Accessories 10.1 Accessories Version specific Operator panel Circuit breaker, operator panel removed For closing operation Motorized operating mechanism -M Closing solenoid -Y1 For opening operation Shunt release -F1 Shunt release -F2 Tripping solenoid -F5 Auxiliary switch for switching position indication -S1 ... S6, S60, S61 Ready-to-close signaling switch -S7 Undervoltage release -F3 Undervoltage release with delay -F8 Overcurrent release -A1 For monitoring 3WT Operating Instructions, 12/2018, 9239 0020 176 06 125 Accessories 10.2 Accessories - general For interlocking 10.2 Reclosing lockout -F5 with tripped signaling contact -S11 Key-operated pushbutton "OFF" Key-operated pushbutton "ON" (mechanical) Accessories - general The following sections describe the accessories available for 3WT. In some cases, the front cover and manual connector may have to be removed. If a withdrawable Circuit breaker is used, it must be set to the maintenance position. The different activities are described in the following sections. DANGER Hazardous voltage Hazardous stored-energy spring mechanism Before starting work, the device must be disconnected from the supply and protected against reactivation. Only carry out work on the device when the Circuit breaker is shut down and the storedenergy spring mechanism is discharged. Failure to do so can result in death, severe injury, or substantial material damage. The devices must be installed and mounted by qualified, authorized personnel only. 3WT 126 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.2 Accessories - general 10.2.1 Removing the operating device Preparatory work Opening the Circuit breaker and discharging the stored energy springs Disconnect auxiliary circuits Pull Circuit breaker to maintenance position and remove See chapter Preparatory work (Page 102) Removing the operator panel Note For withdrawable Circuit breakers: first close the racking hole, then remove the operator panel. Remove the fixing screws (2 x), tool: cross-tip screwdriver (size 3). Move the charging lever until you feel resistance. Remove the front cover by lifting it up and forward. Set down the front cover so that its inside is facing down. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 127 Accessories 10.2 Accessories - general 10.2.2 Installing the operating device Note For withdrawable Circuit breakers: first close the racking hole, then attach the operator panel. Attaching the operator panel Attach the front cover (operator panel) by following the above steps in reverse order. When doing so, push the clamping lever forward until you feel resistance and attach the front cover from above. The fixing screws are tightened to 5 Nm. Final steps Fixed-mounted Circuit breaker: connect the manual connector. When doing so, make sure that you do not trap any cables. Withdrawable Circuit breaker: rack to the test position (from disconnected position to test position: approx. 22 rotations of the racking handle). 3WT 128 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.3 Hand-held test device 10.3 Hand-held test device The hand-held test device is used to check that the following devices function properly: Overcurrent release Energy and current transformer Tripping solenoid F5 Measured value display Article No. Description Article No. Manual function tester for electronic trip unit 3WL9111-0AT32-0AA0 View LED for indicating the operating voltage Control keys 6 LEDs for indicating the test results 3WT Operating Instructions, 12/2018, 9239 0020 176 06 129 Accessories 10.3 Hand-held test device Preparatory work Open and disconnect the Circuit breaker. Note the setting values of the overcurrent release. Deactivate ground fault protection (if available) on the overcurrent release (Ig = OFF). Setting value IR = 1.0 In Remove the cover cap from test socket X25 on the ETU. CAUTION If the hand-held test device is used while the Circuit breaker is closed, this can cause false tripping and destroy the hand-held test device. Connection Note Malfunctions and incorrect test results can occur if the connection sequence is not followed. Test socket on the overcurrent release Cable with SUB D (40 pole) (hand-held test device) to plug connector (40 pole) Power supply Hand-held test device 3WT 130 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.3 Hand-held test device Power supply The hand-held test device is supplied from an AC voltage network: 220 ... 240 V 50/60 Hz 110 ... 125 V 50/60 Hz Factory setting: 220 ... 240 V The selector switch is located on the circuit board within the hand-held test device. Switching the line voltage Operation When the power supply is connected, the status test starts automatically with the querying of different overcurrent release components and parameters. If the status test is successful, the "ETU STATUS" LED lights up (continuous light). If the test is not successful, this means that the overcurrent release or one of its components is either defective or has not been installed. Indicator Meaning 1 x short, pause Test device defective 2 x short, pause Overcurrent release defective 4 x short, pause 5 x short, pause * Parameters set incorrectly * Current transformer incorrectly terminated * Tripping solenoid F5 incorrectly connected or defective * Overcurrent release defective The status test can be repeated at any time by means of the "START" button (press for at least 3 s). The status test can also be carried out on overcurrent releases that have already been activated. In this case, note that the "ETU STATUS" LED may flash twice briefly when the result of the status test is signaled even if no fault is present. To be on the safe side, the overcurrent release should be deactivated and the status test repeated. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 131 Accessories 10.3 Hand-held test device Testing the transformers To test the energy and current transformers, press the "START" button (for less than 2 s). If the LED lights up, this means that the transformer is functioning properly. If the LED flashes, the transformer is either not installed, incorrectly connected, or defective. Result of the N transformer test If the LED flashes (1 s ON, 1 s OFF), this signals a fault with the measuring transformer of the neutral conductor. This might be because a measuring transformer has not been installed (e.g. no external neutral conductor transformer connected), or it has been connected incorrectly, or is defective. If the LED starts flashing quickly (0.5 s ON, 0.5 s OFF), this signals a fault with the energy transformer of the neutral conductor. This might be because an energy transformer has not been installed (e.g. when an external neutral conductor transformer is connected), or it has been connected incorrectly, or is defective. Testing the tripping function Charge the stored-energy spring mechanism manually. Close the Circuit breaker To test the tripping function, press either "L", "S", "I", "N", or "G". The Circuit breaker trips after the set delay time plus 2 seconds. The reason for tripping can be queried via the "QUERY" button on the overcurrent release. To do so, the overcurrent release must have been active for at least 20 minutes. If the Circuit breaker does not trip, the overcurrent release is either not equipped with the relevant protection function or is defective. Testing the measured value display After the tripping test, the capability of the system to store the reasons for tripping must be tested via the "QUERY" button when the ETU is deactivated. To test the measured value display, press "I" and "N" simultaneously. Over a period of 30 s, a current is simulated in L1, L2, L3, N, and G consecutively via the measuring transformer. The LEDs of the corresponding transformers flash. The test is considered successful when current is displayed at the relevant point. 3WT 132 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.3 Hand-held test device Activating the overcurrent release To activate the overcurrent release, press "N" and "G" simultaneously. The overcurrent release remains active until you press a different button. This function can be used, for example, to test the signaling of the "T.U. Error" LED if the status test ended with the fault "Overcurrent release defective". Subsequent steps Restore the setting values you noted down. Place the cover cap on test socket X25. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 133 Accessories 10.4 External transformer for neutral conductors 10.4 External transformer for neutral conductors 10.4.1 External transformer for neutral conductors (for ETU37WT ... ETU47WT) Note The secondary connection cables from the neutral conductor transformer to the 3WT Circuit breaker must be twisted. Article No. Description Article No. Current transformers for 3-pole Circuit breakers, Size I 3WL9111-0AA31-0AA0 external neutral conductor with copper busbars Size II 3WL9111-0AA32-0AA0 Current transformers for 3-pole Circuit breakers, external neutral conductor without copper busbars Size I 3WL9111-0AA21-0AA0 Size II 3WL9111-0AA22-0AA0 External transformer for neutral conductors Version for plant-side copper bar Mounting bracket M6 bolt with washers and nut Version with copper connection elements Connection P2 Connection P1 3WT 134 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.4 External transformer for neutral conductors Assignment of connections This assignment ensures that the current in the Circuit breaker and external N transformer flows in the same direction. Note Any missing auxiliary current connections (secondary disconnect, auxiliary supply connector, sliding contact module for guide frame) can be retrofitted if required. Remove jumper X300.1 - X300.2 Main circuit External N transformer External transformer for neutral conductors - dimension drawings Frame size I Frame size II 3WT Operating Instructions, 12/2018, 9239 0020 176 06 135 Accessories 10.4 External transformer for neutral conductors 10.4.2 External ground fault current transformer (only for ETU47WT) The ground fault protection can use an external current transformer with the following properties: - Primary current: 1200A - Secondary current: 1A - Accuracy: Class 1 - Breaker internal burden: 0.11 Ohm Examples 3 pole Circuit breaker with current transformers "Y" connected with the star point of the transformer grounded. Connection The external ground fault current transformer has to be connected to X100.6 and X100.7. Note Any missing auxiliary current connections(secondary disconnect, auxiliary supply connector, sliding contact module for guide frame) can be retrofitted if required) 3WT 136 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.5 Retrofitting the internal N transformer 10.5 Retrofitting the internal N transformer Article No. Description Article No. Internal N transformer, Size I 3WT9843-1RE00 Internal N transformer, Size II 3WT9843-2RE00 Preparatory work Opening the Circuit breaker and discharging the stored energy springs Disconnect auxiliary circuits Pull Circuit breaker to maintenance position and remove See chapter Preparatory work (Page 102) Retrofitting the internal N transformer Remove the overcurrent release (for details, see Replacing the overcurrent release (Page 122)). 1. Unplug the connector from X24. Removing the cable harness from the overcurrent release 2. Remove the cable from terminals 1 & 2 of plug connector X300 and terminals 6 & 7 of plug connector X100. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 137 Accessories 10.5 Retrofitting the internal N transformer 3. Remove the screws. 4. Remove the transformer covers on the N conductor connection and phase L3 5. Installing the N transformer 6. Insert the connector from the transformer connection into the cable compartment. 7. Attach the transformer cover. 8. Secure with screws (tightening torque: 8 1 Nm). 3WT 138 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.5 Retrofitting the internal N transformer 9. Insert terminals into X100.6 & 7 of plug connector. 10. Plug the connector into X24 of ETU. 11. Pull out the connector of the N transformer in the Circuit breaker. 12. Plug the connector for the cable harness into the connector for the N transformer and place them in the cable duct. Subsequent steps Place the overcurrent release down in front of the Circuit breaker. Connecting the connectors on the overcurrent release (X20, X21 and X28, etc.). Install the overcurrent release (for details, see Replacing the overcurrent release (Page 122)). 3WT Operating Instructions, 12/2018, 9239 0020 176 06 139 Accessories 10.6 Counting mechanism 10.6 Counting mechanism Article No. Description Article No. 5-digit operating cycles counter 3WT9864-0CA00 Check the contents of the packaging Counting mechanism, complete 1x DIN 7991 countersunk screw M6 x 16 - 8 1x Conical nut 1x Preparatory work Opening the Circuit breaker and discharging the stored energy springs Disconnect auxiliary circuits Pull Circuit breaker to maintenance position and remove See chapter Preparatory work (Page 102) Removing the operating device Removing the operating device (Page 127) 3WT 140 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.6 Counting mechanism Installing the counting mechanism Installing the display window Place the operator panel onto a wooden board (make sure that it is in full contact with the surface) near the outline to be cut out. Use a screwdriver to cut out the groove base from the pre-pressed groove. Functional check Charge the stored-energy spring mechanism and watch the counting mechanism. Once the charging process is complete, the counting mechanism is incremented by one. CAUTION Taking the necessary precautions, close and open the Circuit breaker to discharge the stored-energy spring mechanism. Installing the operating device Installing the operating device (Page 128) 3WT Operating Instructions, 12/2018, 9239 0020 176 06 141 Accessories 10.7 Castell lock 10.7 Castell lock Article No. Description Article No. Mounting set for 3WT lock or CASTELL lock 3WT9863-6JE00 Check the contents of the packaging 3WT 142 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.7 Castell lock Housing 1x Latch 1x Seal 1x Hexagon socket-head screw M 6x10 ISO 4017 1x Spring washer A6 DIN 128 2x Threaded pin M 4x8 ISO 7435 1x Door slider (metal) 1x Door slider spring 1x Lock washer 2x Note The following components must be ordered from the relevant manufacturer: Castell lock interlock, version FS2. CAUTION The plastic door slider (if have) must be replaced by the metal door slider in this package. Preparatory work Opening the Circuit breaker and discharging the stored energy springs Disconnect auxiliary circuits Pull Circuit breaker to maintenance position and remove See chapter Preparatory work (Page 102) Removing the operating device See chapter Removing the operating device (Page 127) 3WT Operating Instructions, 12/2018, 9239 0020 176 06 143 Accessories 10.7 Castell lock Installing the door slider (if not already installed) Remove the screws for the electronic overcurrent release . Remove the electronic overcurrent release . Place the door slider spring with the off-center eye in the side panel of the operating mechanism . Place the door slider spring with the center eye in the door slider using a small screwdriver (see diagram). Place the door slider with the door slider spring on the side panel of the operating mechanism and secure it by means of the lock washers . Install the electronic overcurrent release . When doing so, make sure that you do not trap any cables. 3WT 144 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.7 Castell lock Preparing the operator panel Place the operator panel on a stable surface near the outline to be cut out. Use a hammer and screwdriver to cut out the groove base from the pre-pressed groove. File the edges of the cutout. Preparing the Castell / fortress lock Remove the key. Attach the latch as far as it will go onto the square section of the lock . Secure the latch by means of a threaded pin . 3WT Operating Instructions, 12/2018, 9239 0020 176 06 145 Accessories 10.7 Castell lock Installing the Castell / fortress lock in the housing Attach the lock with latch to the housing . Screw the lock onto the housing by means of a hexagon socket-head screw and spring washer . Installing the housing Push the seal over the housing . When doing so, make sure that the wide edge of the seal is on the lower part of the housing. Place the housing with lock into the clips on the side panel of the operating mechanism . The locking pin must audibly engage. 3WT 146 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.7 Castell lock Installing the operating device Installing the operating device (Page 128) Functional check While pressing the OFF button, turn the key clockwise to the locking position. Remove the key. The Circuit breaker cannot close when in this position. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 147 Accessories 10.8 3WT lock (set), 3 locks with 2 keys 10.8 3WT lock (set), 3 locks with 2 keys Article No. Description Article No. Interlocking systems, 3WT lock (set), 3 locks with 2 keys 3WT9863-7JE00 Check the contents of the package Key 2x Lock 3x Note The setup package (Assembly kit for Castell / fortress lock) used for 3WT lock (set) needs to be ordered separately. The article number as spare part: 3WT9863-6JE00. 3WT 148 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.8 3WT lock (set), 3 locks with 2 keys Setup package for 3WT lock (set) Check the contents of the package Housing 1x Latch 1x Seal 1x Hexagon socket-head screw M 6x10 ISO 4017 1x Spring washer A6 DIN 128 2x Threaded pin M 4x8 ISO 7435 1x Door slider (metal) 1x Door slider spring 1x Lock washer 2x CAUTION The plastic door slider (if have) must be replaced by the metal door slider in this package. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 149 Accessories 10.8 3WT lock (set), 3 locks with 2 keys Removing the operating device Removing the operating device (Page 127) Installing the door slider (if not already installed) Remove the screws for the electronic overcurrent release . Remove the electronic overcurrent release . Place the door slider spring with the off-center eye in the side panel of the operating mechanism . Place the door slider spring with the center eye in the door slider using a small screwdriver (see diagram). 3WT 150 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.8 3WT lock (set), 3 locks with 2 keys Place the door slider with the door slider spring on the side panel of the operating mechanism and secure it by means of the lock washers . Install the electronic overcurrent release . When doing so, make sure that you do not trap any cables. Preparing the operator panel Place the operator panel on a stable surface near the outline to be cut out. Use a hammer and screwdriver to cut out the groove base from the pre-pressed groove. File the edges of the cutout. Preparing the 3WT lock Remove the key. Attach the latch as far as it will go onto the square section of the lock . Secure the latch by means of a threaded pin . 3WT Operating Instructions, 12/2018, 9239 0020 176 06 151 Accessories 10.8 3WT lock (set), 3 locks with 2 keys Installing the 3WT lock in the housing Attach the lock with latch to the housing . Screw the lock onto the housing by means of a hexagon socket-head screw and spring washer . Installing the housing Push the seal over the housing . When doing so, make sure that the wide edge of the seal is on the lower part of the housing. Place the housing with lock into the clips on the side panel of the operating mechanism . The locking pin must audibly engage. 3WT 152 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.8 3WT lock (set), 3 locks with 2 keys Installing the operating device Installing the operating device (Page 128) Functional check While pressing the OFF button, turn the key clockwise to the locking position. Remove the key The Circuit breaker cannot close when in this position. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 153 Accessories 10.9 Mechanical interlock 10.9 Mechanical interlock 10.9.1 Information about mechanical interlock Note To ensure that the interlock functions properly, the following minimum switchgear requirements must be fulfilled: 1. Bowden wires must be laid so that they are as straight as possible. 2. The bending radii of the Bowden wire must be > 500 mm. 3. The total bending angle across the length of the Bowden wire must not exceed 540. 4. If the Circuit breakers to be interlocked are arranged vertically, the interlock mechanisms must be aligned. 5. Circuit breakers to be interlocked must be arranged in such a way that 2 m or 4.5 m Bowden wires can be properly laid in accordance with the conditions specified in points 1. - 4. 6. The Bowden wires must be secured before the interlock is adjusted (e.g. cable ties). 7. When choosing the switchgear compartment, make sure that it provides sufficient room for adjusting the interlock. 8. Openings and cutout sections in system elements must be designed in such a way that the direction of the Bowden wires is not changed and that the wires are not obstructed when they are routed. 3WT 154 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.9 Mechanical interlock Mechanical interlock module Output 1 Output 2 Input 2 Input 1 Index brackets The cylinder-head screws with strain washers The mechanical interlock module can be used for two or three Circuit breakers. The following designations apply in the configuration instructions below: O1/2 : Output information 1/2 I1/2 : Input information 1/2 S1/2/3: Circuit breaker 1/2/3 3WT Operating Instructions, 12/2018, 9239 0020 176 06 155 Accessories 10.9 Mechanical interlock If the output information 1 of Circuit breaker 1 is interconnected with the input information 2 of Circuit breaker 2, for example, the following abbreviations are used: S1 O1 - S2 I2 The statuses of the Circuit breakers are indicated on the operator panel as follows: Circuit breaker CLOSED Circuit breaker OPEN and not ready to CLOSE (interlocked) Circuit breaker OPEN and ready to CLOSE (not interlocked) Configuration: Two Circuit breakers back to back Description: A Circuit breaker can only be closed when the other is open. Required equipment: Each Circuit breaker is equipped with an interlocking module and a Bowden wire. Terminals for the Bowden wires: 1. Bowden wire: S1 O1 - S2 I1 2. Bowden wire: S1 I1 - S2 O1 Note The cylinder-head screws with strain washers must be screwed into the index brackets at the following terminals: S1 I1; S2 I1 . In certain configurations, additional Bowden wires are required. Please see chapter Installing Bowden wire (Page 172) 3WT 156 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.9 Mechanical interlock Configuration: Three Circuit breakers stacked Description: Any two Circuit breakers can be closed at any time, with the third interlocked. Required equipment: Each Circuit breaker is equipped with an interlocking module and a Bowden wire. Three additional Bowden wires must be ordered separately. Terminals for the Bowden wires: 1. Bowden wire: S1 O1 - S2 I1 2. Bowden wire: S1 O2 - S3 I1 3. Bowden wire: S2 O1 - S1 I1 4. Bowden wire: S2 O2 - S3 I2 5. Bowden wire: S3 O1 - S1 I2 6. Bowden wire: S3 O2 - S2 I2 Possible Circuit breaker statuses: Example: 3WT Operating Instructions, 12/2018, 9239 0020 176 06 157 Accessories 10.9 Mechanical interlock Configuration: Three Circuit breakers stacked Description: When one Circuit breaker is closed, the other two cannot be closed. Required equipment: Each Circuit breaker is equipped with an interlocking module and a Bowden wire. Three additional Bowden wires must be ordered separately. Terminals for the Bowden wires: 1. Bowden wire: S1O1 - S2I1 2. Bowden wire: S1O2 - S3I1 3. Bowden wire: S2O1 - S1I1 4. Bowden wire: S2O2 - S3I2 5. Bowden wire: S3O1 - S1I2 6. Bowden wire: S3O2 - S2I2 Note The cylinder-head screws with strain washer must be screwed into the index brackets at the following terminals: S2I1, S3I1, S1I1, S3I2, S1I2, S2I2. Possible Circuit breaker statuses: Example: 3WT 158 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.9 Mechanical interlock Configuration: Three Circuit breakers back to back Description: Two Circuit breakers can be closed/opened independently of each other, with the third only ready to be closed when the other two are open. If the third Circuit breaker is closed, the other two cannot be closed. Required equipment: Each Circuit breaker is equipped with an interlocking module and a Bowden wire. The Bowden wire must be ordered separately. Terminals for the Bowden wires: 1. Bowden wire: S1O1 - S2I1 2. Bowden wire: S2O1 - S1I1 3. Bowden wire: S2O2 - S3I1 4. Bowden wire: S3O1 - S2I2 Note The cylinder-head screws with strain washer must be screwed into the index brackets at the following terminals: S2I1, S1I1, S3I1, S2I2. Possible Circuit breaker statuses: Example: 3WT Operating Instructions, 12/2018, 9239 0020 176 06 159 Accessories 10.9 Mechanical interlock Configuration: Three Circuit breakers, of which two are back to back Description: One Circuit breaker can be closed/opened independently of the other two. The two other Circuit breakers are mutually exclusive, that is, one can only be closed when the other is open. Required equipment: Two of the three Circuit breakers are each equipped with an interlocking module and a Bowden wire. Terminals for the Bowden wires: 1. Bowden wire: S2O1 - S3I1 2. Bowden wire: S3O1 - S2I1 Note The cylinder-head screws with strain washers must be screwed into the index brackets at the following terminals: S3I1, S2I1. Possible Circuit breaker statuses: Example: 3WT 160 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.9 Mechanical interlock 10.9.2 Mechanical interlock of fixed-mounted Circuit breakers Article No. Description Article No. Mutual mechanical interlock for fixed-mounted Circuit breaker 3WT9866-3JA00 Check the contents of the packaging 3WT Operating Instructions, 12/2018, 9239 0020 176 06 161 Accessories 10.9 Mechanical interlock Parts list Fixed mounting plate 1x Interlocking module 1x Spring bush 1x Control unit 1x Slotted washer 1x Auxiliary shaft, cpl. frame size 1 1x Auxiliary shaft, cpl. frame size 2 1x Bowden wire 1x Cable tie 1x Insertable nut M6 2x Setnut M6 1x Compression spring 1x Strain washer 6 DIN 6796 9x Cylinder-head screw M6 x 12 DIN 912 5x Cylinder-head screw M6 x 25 DIN 912 4x Part cover 1x Preparatory work - Opening the Circuit breaker and discharging the stored energy springs - Disconnect auxiliary circuits See chapter Preparatory work (Page 102) The minimum distance (a) required between the Circuit breaker and cabinet unit is as follows: For frame size 1 : a = 150 mm For frame size 2 : a = 200 mm If necessary, remove the Circuit breaker. Note If the module is already installed, continue with "Information about mechanical interlock". See chapter Information about mechanical interlock (Page 154) 3WT 162 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.9 Mechanical interlock Removing the operating device Removing the operating device (Page 127) Preparing the operator panel Cut out a sub-shaft hole outline using snipe-nose pliers. With frame size 2, the sub-shaft hole outline must also be cut out of the cover. File the cutout edges to fit the sub-shaft hole outline . Installing the auxiliary shaft in the Circuit breaker Remove the motorized operating mechanism (if installed). Remove the second auxiliary switch (if installed). Unscrew and remove the fixing screw from the underside of the bearing plate. Unscrew the cylinder-head screws (turn three or four times only) and loosen the mounting plate (for frame size 1 only). Unscrew and remove the fixing screw from the top of the bearing plate. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 163 Accessories 10.9 Mechanical interlock Remove the bearing plate with auxiliary shaft . Attach the control unit (see below). Install the auxiliary shaft, cpl. or in the same position as the old one. Complete the Circuit breaker by carrying out the above steps in reverse order. Attaching the control unit Remove the cover engage). and attach the control unit to the breaker shaft (must audibly Attach the part cover to the operator panel. Installing the operating device Installing the operating device (Page 128) 3WT 164 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.9 Mechanical interlock Installing the interlocking module Place the interlocking module against the fixed mounting plate . Secure the interlocking module and fixed mounting plate by means of cylinderhead screws and strain washers (tightening torque: 8 1 Nm). Depending on the configuration, screw the cylinder-head screw with strain washer (tightening torque: 8 1 Nm). into the index brackets Installing the fixed mounting plate Note Shown here without interlocking module 3WT Operating Instructions, 12/2018, 9239 0020 176 06 165 Accessories 10.9 Mechanical interlock Push the insertable nuts into the openings provided. Insert the setnuts with cylinder-head screw into the support brackets fixed mounting plate ). (without Remove the cylinder-head screws again. Place the fixed mounting plate onto the Circuit breaker and secure by means of cylinder-head screws and strain washers (tightening torque: 8 1 Nm). Note Position the strain washers only as shown. Installing Bowden wire Installing Bowden wire (Page 172) 3WT 166 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.9 Mechanical interlock 10.9.3 Mechanical interlock of withdrawable Circuit breakers Article No. Description Article No. Mutual mechanical interlock for withdrawable Circuit breaker 3WT9866-4JA00 Check the contents of the packaging 3WT Operating Instructions, 12/2018, 9239 0020 176 06 167 Accessories 10.9 Mechanical interlock Parts list Interlocking module 1x Control unit 1x Slotted washer 1x Spring bush 1x Setnut M6 3x Cylinder-head screw M6 x 12 DIN 912 5x Strain washer 6 DIN 6796 5x Compression spring 1 x 12.5 x 55.5 DIN 2098 1x Part cover 1x Auxiliary shaft, cpl. frame size 1 1x Auxiliary shaft, cpl. frame size 2 1x Bowden wire 1x Cable tie 1x Preparatory work Opening the Circuit breaker and discharging the stored energy springs Disconnect auxiliary circuits Pull Circuit breaker to maintenance position and remove Preparatory work (Page 102) Removing the operating device Removing the operating device (Page 127) Preparing the operator panel Cut out a sub-shaft hole outline using snipe-nose pliers. With frame size 2, the sub-shaft hole outline must also be cut out of the cover. File the cutout edges to fit the sub-shaft hole outline . 3WT 168 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.9 Mechanical interlock Install auxiliary shaft in Circuit breaker Remove the motorized operating mechanism (if installed). Remove the auxiliary switches (if installed). Unscrew and remove the fixing screw from the underside of the bearing plate. Unscrew the cylinder-head screws (turn three or four times only) and loosen the mounting plate (for frame size 1 only). Unscrew and remove the fixing screw from the top of the bearing plate. Remove the bearing plate with auxiliary shaft . Attach the control unit Install the auxiliary shaft, cpl. or in the same position as the old one. Complete the Circuit breaker by carrying out the above steps in reverse order. Attaching the control unit Remove the cover and attach the control unit to the breaker shaft (must audibly engage). Attach the part cover to the operator panel. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 169 Accessories 10.9 Mechanical interlock Installing the operating device Installing the operating device (Page 128) Install interlocking module 3WT 170 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.9 Mechanical interlock Place the interlocking module against the guide frame . Secure the interlocking module and guide frame by means of cylinder-head screws , strain washers , and setnuts (tightening torque: 8 1 Nm). Depending on the configuration, screw the cylinder-head screw with strain washer (tightening torque: 8 1 Nm). into the index brackets *) If a 30 x 22 mm cutout is not provided, you must create it yourself. Installing Bowden wire Installing Bowden wire (Page 172) 3WT Operating Instructions, 12/2018, 9239 0020 176 06 171 Accessories 10.9 Mechanical interlock 10.9.4 Installing Bowden wire Article No. Description Article No. Bowden wire (2 m) 3WT9866-8JA00 Bowden wire (3 m) 3WT9866-8JA02 Bowden wire (4.5 m) 3WT9866-8JA02 Check the contents of the packaging Bowden wire 1x Spring bush 1x Slotted washer 1x Compression spring 1 x 12.5 x 55.5 DIN 2098 1x Cylinder-head screw M6 x 12 DIN 912 1x Strain washer 6 DIN 6796 1x Cable tie 1x 3WT 172 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.9 Mechanical interlock Inserting and adjusting the Bowden wire Terminal O1 ; O2 * Push Bowden wire with nipple through angle plate , compression spring , and insertable plate . * Secure Bowden wire and nipple by means of slotted washer . * Screw adjusting screw with lock nut into plate . * When the Bowden wire is attached on both sides, the sheath must have approx. 1 mm clearance. If necessary, adjust with adjusting screw . * Fix the setting by means of the lock nut . Terminal I1 ; I2 * Push the compression spring and spring bush over the tube holder and sheath . * Place the Bowden wire with nipple into the index brackets . * Place the spring bush onto the index brackets . * Press the compression spring between the spring bush and plate . * Push the tube holder into the plate . 3WT Operating Instructions, 12/2018, 9239 0020 176 06 173 Accessories 10.9 Mechanical interlock Installing the Bowden wire Bowden wires must be installed in such a way that they are not bent excessively (large bending radii). Secure Bowden wires by means of cable ties . Minimum permissible bending radius: R = 50 mm. This bending radius is only permitted a maximum of six times for each Bowden wire. The remaining bending radii should be as large as possible. WARNING If a mechanical Circuit breaker interlock is installed, two or more Circuit breakers must not be closed simultaneously by electrical or mechanical means. The delay between the close commands must be at least 100 ms. 3WT 174 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.10 Door interlock 10.10 Door interlock 10.10.1 Door interlock for fixed-mounted Circuit breaker Article No. Description Article No. Door interlock for fixed-mounted Circuit breaker 3WT9867-2JA00 Check the contents of the packaging Interlocking module (1x) Catch (1x) Hexagon nut M5, DIN 934 (2x) Strain washer 6, DIN 6796 (1x) Washer 5.3, DIN 125 (2x) Lock washer 5, DIN 6799 (1x) Hexagon socket-head screw M6x30, DIN 912 (1x) Clip (1x) Tension spring with lug (1x) 3WT Operating Instructions, 12/2018, 9239 0020 176 06 175 Accessories 10.10 Door interlock Preparatory work Opening the Circuit breaker and discharging the stored energy springs Disconnect auxiliary circuits Pull Circuit breaker to maintenance position and remove See chapter Preparatory work (Page 102) Removing the operating device See chapter Removing the operating device (Page 127) Installing the interlocking module 1. Push the interlocking module in front of the plastic front panel of the Circuit breaker. 2. Secure the module (8 1 Nm). Note the position of the strain washer . 3WT 176 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.10 Door interlock 3. 4. 5. Insert the tension spring with lug behind the geared motor . Place the tension spring in the lever of the breaker shaft . Place the lug on the pin . Secure the lug by means of the lock washer . Installing the operating device Installing the operating device (Page 128) 3WT Operating Instructions, 12/2018, 9239 0020 176 06 177 Accessories 10.10 Door interlock Install the catch in the cabinet door 1. Drill holes with a diameter of 5.5 mm in the cabinet door . 2. Screw on the catch (tightening torque for component : 0.4 Nm). Functional check 1. Position with Circuit breaker OPEN 2. Position with Circuit breaker CLOSED 3. Overrule 4. Position in overruled condition 3WT 178 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.10 Door interlock 10.10.2 Door interlock for guide frame Article No. Description Article No. Door interlock for withdrawable Circuit breaker 3WT9867-1JC00 Check the contents of the packaging Bolt (1x) Catch (1x) Hexagon nut M5, DIN 934 (2x) Washer 5.3, DIN 125 (2x) Clip (1x) Tension spring (1x) Preparatory work Opening the Circuit breaker and discharging the stored energy springs Disconnect auxiliary circuits Pull Circuit breaker to maintenance position and remove See chapter Preparatory work (Page 102) 3WT Operating Instructions, 12/2018, 9239 0020 176 06 179 Accessories 10.10 Door interlock Installing the bolt in the guide frame Place the bolt 1 on the crossmember of the guide frame . Position the bolt approx. 90 to the crossmember. Bend down the metal lugs on the bolt. Place the tension spring in the bolt and crossmember . 3WT 180 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.10 Door interlock Install the catch in the cabinet door 1. Drill holes with a diameter of 5.5 mm in the cabinet door . 2. Screw on the catch (tightening torque for component : 0.4 Nm). Functional check This can only be carried out once the Circuit breaker has been installed. The switchgear door is interlocked after approx. 4 rotations of the racking handle from the test position toward the connected position. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 181 Accessories 10.11 Phase barrier 10.11 Phase barrier The phase barrier is an accessory of the Circuit breaker which is used for phase short circuit isolation. It provides necessary guide slots and installs fixed interface on the rear wall of the fixed-mounted Circuit breaker and guide frame. Check contents of package Item Description Fixed-mounted breaker Size I - 3P Size I - 4P Size II - 3P Withdrawable breaker Size II - 4P Size I - 3P Size I - 4P Size II - 3P Size II - 4P 4X 6X 4X 6X Cross beam I - 3 pole Cross beam I - 4 pole Clip for withdrawable Clip Fastener Insert nut 4X 6X Socket cap screw M6x16 4X 6X 4X 4X 8X 12X Clamping washer 4X 6X 4X 4X 8X 12X Phase plate 2X 3X Phase plate Phase plate 2X 3X Phase plate 2X 3X 2X 2X 4X 4X 6X 2X 2X 6X 3X 3X 3WT 182 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.11 Phase barrier 10.11.1 Phase barrier for fixed-mounted Circuit breaker Article No. Description Article No. Phase barrier for fixed-mounted Circuit breaker, Size I, 3P 3WT9831-0AA00 Phase barrier for fixed-mounted Circuit breaker, Size I, 4P 3WT9831-0AC00 Phase barrier for fixed-mounted Circuit breaker, Size II, 3P 3WT9831-0AE00 Phase barrier for fixed-mounted Circuit breaker, Size II, 4P 3WT9831-0AG00 Preparatory work Opening the Circuit breaker and discharging the stored energy springs Disconnect auxiliary circuits Pull Circuit breaker to maintenance position and remove Preparatory work (Page 102) 3WT Operating Instructions, 12/2018, 9239 0020 176 06 183 Accessories 10.11 Phase barrier Assembly (size I) Take 3-pole as an example: 1. Take out the arc chute . 2. Place the insert nut into the corresponding hole on the rear wall , and then use allen wrench, socket cap screw and clamping washer to fix the clip to the upper end of the rear wall . 3WT 184 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.11 Phase barrier 3. 4. Take out the fasteners of the corresponding CT cover , as shown in the diagram. Take out the fasteners of the corresponding CT cover , as shown in the diagram. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 185 Accessories 10.11 Phase barrier 5. 6. Insert the phase plate , which is fixed in the correct position when you hear the "click" sound, which ensures that the upper and lower hole of phase plate should be both placed within the clip point. Pay attention that the placement direction of both upper and lower clips should be the same as in the diagram. Install the arc chute into to the Circuit breaker again and fix it as shown in the diagram. 3WT 186 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.11 Phase barrier Assembly (size II) Take 3-pole as an example: 1. Take out the fasteners of the CT cover, as shown in the diagram. 2. Use the fasteners to fix the clip to the corresponding mounting hole as shown in the diagram. of the CT cover, 3WT Operating Instructions, 12/2018, 9239 0020 176 06 187 Accessories 10.11 Phase barrier 3. Insert the phase plate , that is fixed in the correct position when you hear the "click" sound, which ensures that the upper and lower hole of phase plate should be both placed within the clip point. Pay attention that the placement direction of both upper and lower clips should be the same as in the diagram. 3WT 188 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.11 Phase barrier 10.11.2 Phase barrier for guide frame Article No. Description Article No. Phase barrier for withdrawable Circuit breaker, Size I, 3P 3WT9831-0AB00 Phase barrier for withdrawable Circuit breaker, Size I, 4P 3WT9831-0AD00 Phase barrier for withdrawable Circuit breaker, Size II, 3P 3WT9831-0AF00 Phase barrier for withdrawable Circuit breaker, Size II, 4P 3WT9831-0AJ00 Assembly for size I Take 3-pole as an example: 1. Use fasteners to fix the cross beam to the upper and bottom location of the guide frame . See in the diagram, and pay attention to the difference of placement direction for the upper and lower cross beam. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 189 Accessories 10.11 Phase barrier 2. Insert the clip to the location between cross beam and rear wall of guide frame, see the diagram, and it is fixed in the correct position when you hear the "click" sound. Pay attention to the placement direction of clip . 3. Insert the phase plate , which is fixed in the correct position when you hear the "click" sound, which ensures that the upper and lower hole of phase plate should be both placed within the clip point. 3WT 190 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.11 Phase barrier Assembly for size II Take 3-pole as an example: 1. Use socket cap screw , clamping washer and fastener to install the clip to the upper and bottom supporting angle of the guide frame. Just keep them in connection, with no need to fasten them. Pay attention to the placement direction of the clip, as shown in diagram. 2. Insert the phase plate , which is fixed in the correct position when you hear the "click" sound, which ensures that the upper and lower hole of phase plate should be both placed within the clip point. 3. Fasten the screw which is for installing the clip. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 191 Accessories 10.12 Automatic mechanical resetting device after overcurrent tripping 10.12 Automatic mechanical resetting device after overcurrent tripping Article No. Description Article No. Automatic mechanical resetting device after overcurrent tripping 3WT9888-2JA00 Check contents of package Leaf spring 1X Lock washer DIN 6799 - 4 4X Cable binders 2X 3WT 192 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.12 Automatic mechanical resetting device after overcurrent tripping DANGER Hazardous voltage Hazardous stored-energy spring mechanism Before starting work, the device must be disconnected from the supply and protected against reactivation. Only carry out work on the device when the Circuit breaker is shut down and the storedenergy spring mechanism is discharged. Failure to do so can result in death, severe injury, or substantial material damage. The devices must be installed and mounted by qualified, authorized personnel only. Preparatory work Opening the Circuit breaker and discharging the stored energy springs Disconnect auxiliary circuits Pull Circuit breaker to maintenance position and remove See chapter Preparatory work (Page 102) Removing control panel Undo fixing screws Swivel the hand lever forward Extract the control panel towards you 3WT Operating Instructions, 12/2018, 9239 0020 176 06 193 Accessories 10.12 Automatic mechanical resetting device after overcurrent tripping Dismantling the electronic overcurrent release Undo screws and tilt the electronic overcurrent release out sideways. If necessary, cut through the cable binders. Dismantling the fixing bracket Undo socket-head screws by 3 to 4 turns and loosen the mounting plate. Undo hexagon socket-head screw and thread rolling screw of fixing bracket . Lift mounting plate . Remove fixing bracket as shown. 3WT 194 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.12 Automatic mechanical resetting device after overcurrent tripping Fitting the leaf spring Remove the lock washers . Pull axle out of the fixing bracket . Push axle as shown through leaf spring , lever and fixing bracket and secure with lock washers . 3WT Operating Instructions, 12/2018, 9239 0020 176 06 195 Accessories 10.12 Automatic mechanical resetting device after overcurrent tripping Fitting the fixing bracket Lift mounting plate Place fixing bracket with leaf spring against Circuit breaker as shown, making sure that leaf spring is positioned between breaker shaft and cam (see view X). The lever must be in contact with the tripping solenoid and be positioned above the driver pin as shown. Fasten hexagon socket-head screw (tightening torque 8 Nm 1 Nm) and thread rolling screw (tightening torque 3 Nm 0.3 Nm) on fixing bracket . Fasten mounting plate with socket-head screws (tightening torque 8 Nm 1 Nm). 1) Caution: The lever must beat the right side of the tripping solenoid as shown. 3WT 196 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.12 Automatic mechanical resetting device after overcurrent tripping Installing the electronic overcurrent release Place electronic overcurrent release against Circuit breaker, making sure that no cables are pinched. Fix electronic overcurrent relay to Circuit breaker by means of screws (tightening torque 3 Nm + 0.3 Nm). Final operations Fit the control panel in reverse order. Caution! With withdrawable Circuit breakers, close off the crank hole before fitting control panel. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 197 Accessories 10.13 Switching from fixed-mounted Circuit breakers to withdrawable Circuit breakers 10.13 Switching from fixed-mounted Circuit breakers to withdrawable Circuit breakers Article No. Description Article No. Conversion set from fixed-mounted to withdrawable version Size I, 3P 3WT9888-0GA00 Size I, 4P 3WT9888-0HA00 Size II, 3P 3WT9888-0KA00 Size II, 4P 3WT9888-0LA00 Check the contents of the packaging 3WT 198 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.13 Switching from fixed-mounted Circuit breakers to withdrawable Circuit breakers Positioning actuator 1x Angle bracket (left) 1x Angle bracket (right) 1x Hexagon socket-head screw M6x30 DIN 912 1x Countersunk screw M6x20 DIN 7991 8x Hexagon socket-head screw M6x12 or similar, DIN 912 FS I 2x, FS II 3x Strain washer 6 DIN 6796 1x Washer 6,4 DIN 433 FS I 1x, FS II 2x Insert 1x Lever 1x Slide switch 1x Leg spring 1x Plastite screw 6. 19x10 2x DUOCLIPS 4SXN 10 1x Adhesive label 1x Door slider 1x Door slider spring 1x Lock washer DIN 6799-5 2x Note The components are shown in simplified form. Article number Frame size Number of poles Dimension "I" (Part 1) 3WT9888-0GA00 3WT9888-0KA00 3WT9888-0HA00 3WT9888-0LA00 I II I II 3 3 4 4 281 381 371 501 Preparatory work Opening the Circuit breaker and discharging the stored energy springs Disconnect auxiliary circuits See chapterPreparatory work (Page 102) Removing the operating device Removing the operating device (Page 127) 3WT Operating Instructions, 12/2018, 9239 0020 176 06 199 Accessories 10.13 Switching from fixed-mounted Circuit breakers to withdrawable Circuit breakers Unscrewing the angle bracket Attaching the positioning actuator Place the Circuit breaker on its back. Important: place it on a soft surface. The underside of the Circuit breaker should ideally point to the installation engineer. Push the angle bracket and over the shaft ends and position up against the Circuit breaker housing. Insert the positioning actuator in the Circuit breaker screw and strain washer (tighten by hand only). and of the positioning actuator and secure by means of the Secure the angle brackets and by means of the screws (tightening torque: 8 1 Nm). Fix the positioning actuator securely by means of the screw (tightening torque: 8 1 Nm). Screw the coding screws for the rated current coding into the base plate positioning actuator . of the Note The coding screws are thread-shaped screws, which means that they require a higher tightening torque. For the arrangement of the coding screws, see the diagram below. Tightening torque: 8 1 Nm Place the Circuit breaker in an upright position again. 3WT 200 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.13 Switching from fixed-mounted Circuit breakers to withdrawable Circuit breakers Coding scheme Rated current 1250 A, 1) N/S1) Frame size Coding screw in hole I a 1600 A, N I a 1600 A, S I b 630 - 2500 A 3200 A 3800 A II II II a c b N: Circuit breakers with normal breaking capacity. S: Circuit breakers with standard breaking capacity. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 201 Accessories 10.13 Switching from fixed-mounted Circuit breakers to withdrawable Circuit breakers Insert the shutter and slide switch into the cutout of the operator panel together from inside and secure by means of screws . Make sure that the shutter can move without hindrance and leave it closed. Place the lever and leg spring onto the pins of the operator panel. Place the bent leg 13 over lever so that leg 13 can be moved by lever . Secure both parts by means of DUOCLIPS . Important: The lever must rotate without hindrance. 3WT 202 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.13 Switching from fixed-mounted Circuit breakers to withdrawable Circuit breakers Attaching the adhesive label and changing the rating plate. Stick the label onto the front of the operator panel. Changing the rating plate: Change the 12th digit of the MLFB to "4" and the 13th to "5" (use an indelible marker). 3WT Operating Instructions, 12/2018, 9239 0020 176 06 203 Accessories 10.13 Switching from fixed-mounted Circuit breakers to withdrawable Circuit breakers Installing the door slider (if not already installed) Remove the screws for the electronic overcurrent release. Remove the electronic overcurrent release. Place the door slider spring with the off-center eye in the side panel of the operating mechanism. Place the door slider spring with the center eye in the door slider using a small screwdriver (see diagram). Place the door slider with the door slider spring on the side panel of the operating and secure it by means of the lock washers . mechanism Attach the electronic overcurrent release not trap any cables. . When doing so, make sure that you do Installing the operating device Installing the operating device (Page 128) 3WT 204 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.13 Switching from fixed-mounted Circuit breakers to withdrawable Circuit breakers Encoding in the guide frame Coding scheme Rated current Frame size Coding screws in hole 1250 A, N/S I b 1600 A, N I b 1600 A, S I a 630 - 2500 A 3200 A 3800 A II II II b+c a+b a+c 3WT Operating Instructions, 12/2018, 9239 0020 176 06 205 Accessories 10.13 Switching from fixed-mounted Circuit breakers to withdrawable Circuit breakers Summary of coding for Circuit breaker and guide frame FS Rated current Coding Circuit breaker I II a b 1250 A, N/S 1600 A, N 1600 A, S Withdrawable part c a b c 630 - 2500 A 3200 A 3800 A 3WT 206 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.14 Vertical connections for fixed-mounted Circuit breaker 10.14 Vertical connections for fixed-mounted Circuit breaker Article No. Description Vertical connection for fixed-mounted circuit breaker Article No. Size I, up to 1250 A, N/S class; 1600 A, N class 3WT9821-7AC00 Size I, 1600 A, S class 3WT9821-7BC00 Size II, 630 A and 2500 A, 3P 3WT9821-7DA00 Size II, 630 A and 2500 A, 4P 3WT9821-7DB00 Size II, 3200 A, 3P 3WT9821-7FA00 Size II, 3200 A, 4P 3WT9821-7FB00 Check the contents of the packaging 3WT Operating Instructions, 12/2018, 9239 0020 176 06 207 Accessories 10.14 Vertical connections for fixed-mounted Circuit breaker Article number Connection piece Connection piece Connection piece Connection piece Connection piece Connection piece Connection piece Connection piece Connection piece Connection piece Connection piece Hexagon-head screw M12 x 30 DIN933 Hexagon-head screw M12 x 45 DIN931 Hexagon-head screw M12 x 80 DIN931 Hexagon nut M12 DIN934 Strain washer 12 DIN6796 Frame size / no. of poles Rated current A 3WT9821 - 7AC00 I/3 I/4 1250 A, N/S 3WT9821 - 7BC00 I/3 I/4 3WT9821 - 7DA00 3WT9821 - 7DB00 II / 3 3WT9821 - 7FA00 3WT9821 - 7FB00 II / 3 3WT9821-7FC00 II / 3 3WT9821-7FD00 II/4 II / 4 II / 4 1600 A, N Number of items 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 3 4 1600 A, S 630-2500 6 8 3 4 1 1 2 3 3200 4000 1 1 2 3 1 1 1 1 1 1 1 6 8 6 8 6 8 6 8 6 8 6 8 6 8 6 8 6 8 6 8 6 8 6 6 6 8 8 8 Preparatory work Opening the Circuit breaker and discharging the stored energy springs Disconnect auxiliary circuits See chapter Preparatory work (Page 102) 3WT 208 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.14 Vertical connections for fixed-mounted Circuit breaker Installing the connection pieces (frame size I) Place the connection piece or on the connection bar as shown and secure by means of a hexagon socket-head screw or , strain washer and hexagon nut (tightening torque: 70 7 Nm). 3WT Operating Instructions, 12/2018, 9239 0020 176 06 209 Accessories 10.14 Vertical connections for fixed-mounted Circuit breaker Installing the connection pieces (frame size II) Place the connection pieces and or and on the connection bar as shown and secure by means of a hexagon socket-head screw or , strain washer and hexagon nut (tightening torque: 70 7 Nm). Note Make sure that connection pieces and or and (symmetrical and asymmetrical) are mounted in the correct position. The 3-pole version does not have the outer connections on the right. 3WT 210 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.15 Connection bars for guide frame (frame size I) 10.15 Connection bars for guide frame (frame size I) Article No. Description Vertical connection for guide frame Front connection for guide frame Article No. Size I, up to 1250 A, N/S class; 1600 A, N class 3WT9823-3AA00 Size I, 1600 A, S class 3WT9823-3BA00 Size I, up to 1250 A, N/S class; 1600 A, N class 3WT9823-1AA01 Size I, 1600 A, S class 3WT9823-1BA01 Check the contents of the packaging Vertical connection 1250 A Vertical connection 1600 A Front connection with DIN hole pattern 1250 A Front connection with DIN hole pattern 1600 A Hexagon-head screw M6 x 25 - 8.8 DIN 933 Hexagon-head screw M6 x 35 - 8.8 DIN 933 Strain washer 6 DIN 6796 3WT Operating Instructions, 12/2018, 9239 0020 176 06 211 Accessories 10.15 Connection bars for guide frame (frame size I) Parts list Article number Rated current Connection type 3WT9823-3AA00 1250 A Vertical connection 3WT9823-3BA00 1600 A Vertical connection 3WT9823-1AA01 1250 A DIN front connection 3WT9823-1BA01 1600 A DIN front connection Quantity 1 2 3 4 1 5 6 4 1 4 4 1 1 7 4 2 2 4 2 2 4 Preparatory work Opening the Circuit breaker and discharging the stored energy springs Disconnect auxiliary circuits Pull Circuit breaker to maintenance position and remove See chapter Preparatory work (Page 102) Installing the connection bars Unscrew any connection pieces. To do so, unscrew the fixing screws or and remove the connection pieces from the finger clusters . When doing so, make sure that you do not pull the finger clusters out of the rear panel . Note If necessary, only insert finger clusters that have been removed in the position shown in Fig. 2, that is, the stop pin must point toward the connection pieces. Insert the new connection pieces as shown in Fig. 1 and Fig. 2 and secure them by means of the enclosed screws and strain washers (tightening torque: 8 1 Nm). See Fig. 1 for the fixing screw assignments; see Fig. 2 for the position of the strain washers. All diagrams are simplified. 3WT 212 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.15 Connection bars for guide frame (frame size I) Fig. 1: Rear panel of guide frame, rear view, possible connection types Fig. 2: Position of the finger clusters 3WT Operating Instructions, 12/2018, 9239 0020 176 06 213 Accessories 10.16 Connection bars / connection pieces for guide frame version FS II 10.16 Connection bars / connection pieces for guide frame version FS II Article No. Description Vertical connection for guide frame Front connection for guide frame Article No. Size II, 630 A and 2500 A, 3P 3WT9823-4AB00 Size II, 630 A and 2500 A, 4P 3WT9823-4AC00 Size II, 3200 A, 3P 3WT9823-4BB00 Size II, 3200 A, 4P 3WT9823-4BC00 Size II, 630 A and 2500 A 3WT9823-1DA01 Size II, 3200 A 3WT9823-1EA01 Check the contents of the packaging 3WT 214 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.16 Connection bars / connection pieces for guide frame version FS II Connection bar 2500 A, DIN hole pattern Connection bar 3200 A, DIN hole pattern Hexagon-head screw DIN 931 - M 10 x 40 - 8 Hexagon-head screw DIN 931 - M 10 x 55 - 8 Cylinder-head screw DIN 933 - M 6 x 40 - 8 Square nut M 6 Strain washer DIN 6796 - 10 - St Strain washer DIN 6796 - 6 - St Connection piece 2500A Connection piece 3200A Hexagon-head screw DIN 933 - M6 x 16 - 8.8 Strain washer DIN 6796 - 6 - Fst Washer DIN 9021 - 6,4 Preparatory work Opening the Circuit breaker and discharging the stored energy springs Disconnect auxiliary circuits Pull Circuit breaker to maintenance position and remove See chapter Preparatory work (Page 102) Quantity of parts Article number of packing unit Circuit breaker frame size 3WT9823 - 1DA01 II 2500 DIN / double-hole row 3WT9823 - 1EA01 II 3200 DIN / double-hole row 3WT9823 - 4AB00 3WT9823 - 4AC00 II 15 2500 3WT9823 - 4BB00 3WT9823 - 4BC00 II 30 3200 Article number of packing unit a (mm) Rated current (A) Hole pattern Part no. 9 10 11 12 3WT9823 - 4AB00 3WT9823 - 4AC00 12 16 12 16 6 8 2 3 3WT9823 - 4BB00 3WT9823 - 4BC00 12 16 12 16 3WT9823 - 1DA01 3WT9823 - 1EA01 1 2 1 3 4 2 1 2 5 6 7 8 2 2 2 2 2 2 2 2 13 14 15 1 1 2 3 1 1 3WT Operating Instructions, 12/2018, 9239 0020 176 06 215 Accessories 10.16 Connection bars / connection pieces for guide frame version FS II Installing the connection bars Installation sequence: 1. Press the connection bars in parallel onto the screw-on points and tighten the screws (tighten by hand only). 2. Tighten the screws and to 40 4 Nm. 3. Tighten the screws with to 1 Nm. Note Note the position of the strain washers. 3WT 216 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.16 Connection bars / connection pieces for guide frame version FS II Installing the connection pieces 1. Unscrew any connection pieces. To do so, unscrew the fixing screw and remove the connection pieces with the finger clusters (X) (Fig. 1). 2. Insert the new connection pieces (Fig. 2) and secure them by means of the enclosed screws and strain washers (Fig. 3) (tightening torque: 8 1 Nm). Arrangement of the connection pieces 3WT Operating Instructions, 12/2018, 9239 0020 176 06 217 Accessories 10.17 Position signaling switch for guide frame 10.17 Position signaling switch for guide frame Article No. Description Article No. Position signaling switch module (For withdrawable Circuit breaker only) 3WT9884-1JC10 Check the contents of the packaging (position signaling switch without intermediate terminal) Screw 4x Washer 4x Position signaling switch module 1x Position signaling switch module 1x Preparatory work Opening the Circuit breaker and discharging the stored energy springs Disconnect auxiliary circuits Pull Circuit breaker to maintenance position and remove See chapter Preparatory work (Page 102) 3WT 218 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.17 Position signaling switch for guide frame Installing the position signaling switch without intermediate terminal Cross-tip screwdriver (size 2) 3WT Operating Instructions, 12/2018, 9239 0020 176 06 219 Accessories 10.17 Position signaling switch for guide frame Connecting the position signaling switch without intermediate terminal Circuit diagrams Connecting the position signaling switch (article number 3WT9884-1JC10) Circuit diagrams 3WT 220 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.18 Shutters 10.18 Shutters Article No. Description Shutters Article No. Size I, 3P 3WT9884-3CA00 Size I, 4P 3WT9884-3DA00 Size II, 3P 3WT9884-3CB00 Size II, 4P 3WT9884-3DB00 Check the contents of the packaging for frame sizes I and II 3WT Operating Instructions, 12/2018, 9239 0020 176 06 221 Accessories 10.18 Shutters Frame size Number of poles I I II II 3 4 3 4 3CA00 3CB00 3DA00 3DB00 Control mechanism 2 2 2 2 Shutters 1 Article number 3WT 9884 Shutters Cover 2 2 Cover 2 Shutters 2 Shutters 2 Cover 2 Cover 2 Insulating plate 1 Insulating plate 1 Cover strip 3 5 Hook 2 2 2 2 Pan-head screw M 4 x 8 ISO 7045 2 2 2 2 Plastite screw 6- 19 x 10 8 8 4 5 4 5 2 2 Washer 4,3 DIN 125 Strain washer 4 DIN 6796 2 Shutters 1 2 Note These operating instructions apply to 3 and 4-pole guide frames. Preparatory work Opening the Circuit breaker and discharging the stored energy springs Disconnect auxiliary circuits Pull Circuit breaker to maintenance position and remove See chapter Preparatory work (Page 102) 3WT 222 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.18 Shutters Installing the shutter - work sequence for frame size I Control mechanism properly installed 1. Pull out the guides. 2. Snap the control mechanism into place . Place the shutter on the lever of the control mechanism . Screw on the cover strip . For 4-pole version only 3WT Operating Instructions, 12/2018, 9239 0020 176 06 223 Accessories 10.18 Shutters Attach the upper and lower covers . Screw the hook onto the guides. 3WT 224 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.18 Shutters Installing the shutter - work sequence for frame size II Control mechanism properly installed 1. Pull out the guides. 2. Snap the control mechanism into place . Place the shutter on the lever of the control mechanism . Attach the insulation plate and secure. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 225 Accessories 10.18 Shutters Attach the upper and lower cover . Screw the hook onto the guides. Functional check: frame sizes I and II Move the upper and lower lever and in the direction of the arrow until the shutter is open fully. When you let go of the levers, the shutters should close automatically. 3WT 226 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.18 Shutters Locking the shutter: frame sizes I and II Note The following options are available: * Both shutters closed * The top shutter open * The lower shutter open * Both shutters open Two padlocks are required here for each shutter. These must be provided by the customer. 1. Both shutters closed: - Insert the guides as far as they will go. - Push the bolt up as far as it will go. - Place the padlocks in the holes and lock. 2. Upper shutter open: - Push the upper lever up in the direction of the arrow. - Continue as described above (1). 3. Lower shutter open: work sequence as described above (2). 4. Both shutters open: - Move the upper and lower lever in the direction of the arrow. - Continue as described above (1). 3WT Operating Instructions, 12/2018, 9239 0020 176 06 227 Accessories 10.19 Arc chute cover 10.19 Arc chute cover This is only valid for withdrawable air Circuit breaker. The cover for arc chute is an accessory for the guide frame, and it provides protection directly for the switching device above the air Circuit breaker. Article No. Description Arc chute cover Article No. Size I, 3P 3WT9811-0GA00 Size I, 4P 3WT9811-0HA00 Size II, 3P 3WT9811-0JA00 Size II, 4P 3WT9811-0KA00 Check contents of package Item Description Withdrawable Circuit breaker Size I - 3P Size I - 4P Size II - 3P Size II - 4P Side plate left, cpl 1X 1X 1X 1X Side plate right, cpl 1X 1X 1X 1X Protective cover 1X Protective cover 1X 3WT 228 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.19 Arc chute cover Withdrawable Circuit breaker Item Description Protective cover Protective cover Countersunk screw M 6X16 4X 4X 4X 4X Conical nut M6 4X 4X 4X 4X Socket cap screw M 6X16 2X 2X 2X 2X Clamping washer 2X 2X 2X 2X Hexagon nut M6 2X 2X 2X 2X Size I - 3P Size I - 4P Size II - 3P Size II - 4P 1X 1X Preparatory work Opening the Circuit breaker and discharging the stored energy springs Disconnect auxiliary circuits Pull Circuit breaker to maintenance position and remove See chapter Preparatory work (Page 102) Assembly Take size 1, 3-pole as an example: Use allen wrench to dismantle the fasteners of the carrier beam of the guide frame, and these fasteners will be kept for use in next steps. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 229 Accessories 10.19 Arc chute cover Take the left and right side plates and insert them from above the Circuit breaker. Use allen wrench, screw , washer and nut to fix the side plate to the guide frame. Use fasteners to fix the carrier beam and both left and right side plates. 3WT 230 Operating Instructions, 12/2018, 9239 0020 176 06 Accessories 10.19 Arc chute cover Insert the upper protective cover according to the diagram, making contact with both left and right side plate . Pay attention that the protective cover should be placed to inside of side plate corner. Use countersunk screw M6x16 and conical nut M6 to fix the protective cover to both side plates. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 231 11 Troubleshooting Fixedmounted Circuit breaker Withdrawable Circuit breakers Fault The Circuit breaker cannot be closed mechanically and/or electrically. The stored-energy spring mechanism has not been charged. (The Circuit breaker is not ready to close, ready-to-close indicator ) The undervoltage release is Connect the undervoltage not excited. release to the power supply. Mechanical reclosing lockout active. Rectify cause of overcurrent tripping and press RESET. Electrical closing lockout active. Remove the control voltage of the closing lockout. *) Mechanical OFF pushbutton locked. Enable the pushbutton. 2 Block against closing. 1 Close the cabinet door. Mechanical Circuit breaker interlock active (accessories). Open the interlocking Circuit-breaker or rack it to disconnected position. 2 Electronic overcurrent release not installed or installed incorrectly. Install the electronic overcurrent release properly. The Circuit breaker is set to Rack the Circuit breaker to an intermediate position in the disconnected, test, or the guide frame (note the operating position. position indicator). Shutter for racking handle opening not closed. Close the shutter (to disconnected, test, or operating position). The operating voltage of the closing solenoid is incorrect or has not been applied. Check that the voltage is correct or apply the voltage. The Circuit breaker cannot be closed by electrical means. (The Circuit breaker is ready to close, ready-to-close indicator OK) Cause Charge the stored-energy spring mechanism. The circuit breaker is in the Rack the circuit breaker to disconnected position in the the test or operating posiguide frame. tion. The auxiliary supply connector has been unplugged. Remedy The guide rails cannot be pulled out The shutter is locked with to install the Circuit breaker. one or two padlocks. Plug in the auxiliary supply connector. Remove the padlocks. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 233 Troubleshooting Fixedmounted Circuit breaker Withdrawable Circuit breakers Fault The Circuit breaker cannot be switched from the maintenance position to the disconnected position. Cause Remedy The positioning mechanism Rack the positioning of the Circuit breaker is not mechanism to the disconin the disconnected position nected position. (note the position indicator). You have attempted to insert the Circuit breaker in a guide frame with a different rated current. The Circuit breaker and guide frame are encoded differently. Only use Circuit breakers with the same rated current as the guide frame. When the Circuit breaker is racked from the disconnected position to the test position, you encounter a high level of resistance as soon as you pass the disconnected position. The Circuit breaker was not inserted as far as it will go and the side latches are not yet engaged (warning: danger of destroying the device). When you rack the Circuit breaker from the disconnected position to the test position, it does not move for the first eight rotations. No fault, due to the function Continue racking The racking handle cannot be inserted. The OFF button has not been pressed. Press the OFF button and, at the same time, move the slide switch to the right. The cabinet door is not completely shut. Close the cabinet door. Racking handle opening locked with padlock(s). Remove the padlock(s). 1 The cabinet door cannot be opened When the Circuit breaker is (door interlock as accessory). closed, this interlocks the cabinet door. 1 Effective when the cabinet door is open (accessory). 2 Note the following safety information: Push the Circuit breaker to the disconnected position as far as it will go. The side latches must engage. Open Circuit breaker The Circuit breaker is in the Rack the Circuit breaker to operating position. the test position or disconnected position. Note Protective device Override only if permissible under normal operating conditions. 3WT 234 Operating Instructions, 12/2018, 9239 0020 176 06 12 Dimension drawings The dimensions are measured in unit of mm in this chapter. 12.1 Fixed-mounted Circuit breaker, Frame size I, 3 pole and 4 pole The broken contour at the side depicts the 4-pole version. For missing dimensions please see the drawing of horizontal connection. Horizontal connection Fixing points 4 x press nut M8 Center line of operator panel Auxiliary conductor connection system Clearance for lifting out the arc chutes Space for auxiliary supply connector b Space above arc chutes Cabinet door Countersunk handle Slot (4 mm deep) for phase barriers Communication Module (optional) Rated current a c d e 1250 A, N / S 8 8 8 134.5 265.5 1600 A, N 8 8 8 134.5 265.5 1600 A, S 15 15 20 127.5 272.5 3WT Operating Instructions, 12/2018, 9239 0020 176 06 235 Dimension drawings 12.1 Fixed-mounted Circuit breaker, Frame size I, 3 pole and 4 pole Vertical connection Front connection Safety distances No additional safety distance from adjacent, grounded components is required above the Circuit breaker (on fixed-mounted Circuit breakers marked with ""). The distance between the connection point and bar support must not exceed 250 mm Up to a rated operating voltage of 440 V AC, the vertical bars (e.g. with front connection) must not be shielded if the busbar system is not located above the Circuit breaker. On the other hand, live, bare conductors and bars with voltages in excess of 440 V AC (if they are located above the Circuit breaker and if the current is supplied from above) must be protected against flashover by means of phase barriers, bar covers, or arc chute covers (only use accessories for horizontal or vertical connections). Optional electrical equipment directly above the Circuit breaker (if arc chutes are not used) or next to the Circuit breaker should be protected with a cover. Once you have installed additional phase barriers or covers, you must ensure that heat dissipation from the Circuit breaker is not impeded. 3WT 236 Operating Instructions, 12/2018, 9239 0020 176 06 Dimension drawings 12.2 Fixed-mounted Circuit breaker, Frame size II, 3 pole and 4 pole 12.2 Fixed-mounted Circuit breaker, Frame size II, 3 pole and 4 pole The broken contour at the side depicts the 4-pole version. For missing dimensions please see the drawing of horizontal connection. Horizontal connection Fixing points 4 x press nut M8 Center line of operator panel Auxiliary conductor connection system Clearance for lifting out the arc chutes Space for auxiliary supply connector Space above arc chutes Cabinet door Countersunk handle Slot (4 mm deep) for phase barriers Communication Module (optional) Rated current a b c d e f g 630 - 2500 A 15 15 20 122.5 267.5 80 40 3200 A 30 30 20 95 285 100 50 3WT Operating Instructions, 12/2018, 9239 0020 176 06 237 Dimension drawings 12.2 Fixed-mounted Circuit breaker, Frame size II, 3 pole and 4 pole Vertical connection up to 3200 A Vertical connection 4000 A Front connection 3WT 238 Operating Instructions, 12/2018, 9239 0020 176 06 Dimension drawings 12.3 Withdrawable Circuit breaker, Frame size I, 3 pole and 4 pole 12.3 Withdrawable Circuit breaker, Frame size I, 3 pole and 4 pole The broken contour at the side depicts the 4-pole version. For missing dimensions please see the drawing of horizontal connection. Horizontal connection Holes for securing the guide frame 4 x O9 Center line of operator panel Auxiliary conductor connection system Guide frame Cabinet door Disconnected position Test position Connected position Slot (6 mm deep) for phase barriers Communication Module (optional) Rated current a b c 1250 A, N / S 8 8 8 1600 A, N 8 8 8 1600 A, S 15 15 15 3WT Operating Instructions, 12/2018, 9239 0020 176 06 239 Dimension drawings 12.3 Withdrawable Circuit breaker, Frame size I, 3 pole and 4 pole Vertical connection Front connection 3WT 240 Operating Instructions, 12/2018, 9239 0020 176 06 Dimension drawings 12.4 Withdrawable Circuit breaker, Frame size II, 3 pole and 4 pole 12.4 Withdrawable Circuit breaker, Frame size II, 3 pole and 4 pole The broken contour at the side depicts the 4-pole version. For missing dimensions please see the drawing of horizontal connection. Horizontal connection Holes for securing the guide frame 4 x O9 Center line of operator panel Auxiliary conductor connection system Guide frame Cabinet door Disconnected position Test position Connected position Slot (6 mm deep) for phase barriers Communication Module (optional) Rated current a b c d e f g 630 - 2500 A 15 15 20 137.5 252.5 80 40 3200 A 30 30 20 125 255 100 50 3WT Operating Instructions, 12/2018, 9239 0020 176 06 241 Dimension drawings 12.4 Withdrawable Circuit breaker, Frame size II, 3 pole and 4 pole Vertical connection up to 3200 A Vertical connection 3800 A Front connection 3WT 242 Operating Instructions, 12/2018, 9239 0020 176 06 Dimension drawings 12.5 Accessories 3 pole / 4 pole 12.5 Accessories 3 pole / 4 pole Mechanical interlock (1) Interlocking device that prevents closing (2). Comprising an interlock in the cabinet and an interlocking module with Bowden wire. Distance for interlocking module (without Bowden wire) Distance for a b c d e (1) 90 90 50 65 270 (2) 58 215 10 250 115 Arc chute cover For withdrawable Circuit breakers only. The dimension of Circuit breaker with arc chute cover 3WT Operating Instructions, 12/2018, 9239 0020 176 06 243 Dimension drawings 12.6 Door cutout 3 pole / 4 pole 12.6 Door cutout 3 pole / 4 pole Door cutout for operator panel with door sealing frame Mounting surface * 3 holes, diameter O 5.5 mm; only drill if door interlock is used Door cutout with edge protection Cutout after edge protection is attached Cutout when Circuit breaker is installed in cabinet and when door is in central position. Width of cutout Fixed-mounted Circuit breaker Withdrawable Circuit breaker b b 400 275 292 500 275 290 600 275 288 3WT 244 Operating Instructions, 12/2018, 9239 0020 176 06 Dimension drawings 12.7 Current transformer for N conductor 12.7 Current transformer for N conductor Frame size I, 3WL9 111-0AA21-0AA0 Frame size II, 3WL9 111-0AA22-0AA0 Frame size I, 3WL9 111-0AA31-0AA0 Frame size II, 3WL9 111-0AA32-0AA0 3WT Operating Instructions, 12/2018, 9239 0020 176 06 245 Circuit diagrams 13.1 13 Overall circuit diagram Accessories in overall circuit diagram A1 Electronic overcurrent release S1 / S2 1st auxiliary switch block S3 / S4 2nd auxiliary switch block S5 / S6 2nd auxiliary switch block S5 / S60 2nd auxiliary switch block S60 / S61 2nd auxiliary switch block S7 Ready-to-close signaling contact S11 Trip signalling ON Mechanical ON OFF Mechanical OFF F1 Shunt release or electrical closing lockout F2 Shunt release F3 Undervoltage release F8 Undervoltage release with delay F5 Tripping solenoid M1 Motor for charging stored-energy spring mechanism P Stored-energy spring mechanism R Display and reset plunger for overcurrent tripping Q01 Spring charging lever for spring energy store Q1 Main contacts T1 / T2 / T3 Current transformers X100 / X200 / X300 / X400 Connecting terminals Y1 Closing solenoid BSSWT Breaker Status Sensor, BSSWT V-Tap V-Tap COM16WT Communication module COM16WT 3WT Operating Instructions, 12/2018, 9239 0020 176 06 247 Circuit diagrams 13.1 Overall circuit diagram 3WT 248 Operating Instructions, 12/2018, 9239 0020 176 06 Circuit diagrams 13.2 Circuit diagram for undervoltage release with delay 13.2 Circuit diagram for undervoltage release with delay Circuit for EMERGENCY OFF function (instant OFF when S15 is open) Circuit without EMERGENCY OFF function S15 = external instant OFF S16 = external delayed OFF 3WT Operating Instructions, 12/2018, 9239 0020 176 06 249 Circuit diagrams 13.3 Terminal diagrams 13.3 Terminal diagrams The following overview shows which part of the internal equipment is connected to which part of the contact blocks, i.e. this is a complete auxiliary wiring diagram of the Circuit breaker. 3WT 250 Operating Instructions, 12/2018, 9239 0020 176 06 Glossary Auxiliary trip unit Undervoltage releases and shunt releases are available. BSSWT Breaker Status Sensor for 3WT for collecting circuit breaker status information via signalling switches and transmitting these data to the CubicleBUS. Closing solenoid Electrical closing of the energy in the spring energy store. COM16WT Communication module for 3WT. Electrical closing lockout This function is designed to electrically interlock two or more Circuit breakers (closing lockout). The electrical closing lockout prevents the Circuit breaker from closing with a continuous signal. Energy transformer Generates energy (power supply) for the internal supply of the overcurrent release. Finger contacts These connect the main terminals on the Circuit breaker to the main terminals on the guide frame. Manual connector coding The manual connectors can be coded to prevent the auxiliary conductor connectors from being connected incorrectly. Mechanical interlock This function supports different types of mechanical interlocking for Circuit breakers. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 251 Glossary Mechanical reclosing lockout After overcurrent tripping, the Circuit breaker is locked against reclosing until the mechanical reclosing lockout function has been manually reset. Motorized operating mechanism A geared motor automatically charges the stored-energy spring mechanism as soon as voltage has been applied to the auxiliary supply connections. After one closing operation, the stored-energy spring mechanism is automatically charged for the next closing operation. Position indicator This indicates the position of the Circuit breaker (disconnected/test/operating position) in the guide frame. Position signaling switch This is used for remotely displaying the Circuit breaker position in the guide frame. Powerconfig Software for commissioning and service, free of charge available at: www.siemens.com/powerconfig-download powerconfig is used as a shared commissioning and maintenance tool for the circuit breakers with communication capability. It offers a standardized interface and a uniform operator control concept for the activities to be carried out, such as - Parameterizing - Operating - Monitoring, and - Diagnosing. "3WT air circuit breaker with communication capability-Modbus", please see: https://support.industry.siemens.com Racking rail Accommodates the Circuit breaker in the guide frame. Rated current coding The rated current is coded in the factory, that is, each Circuit breaker can only be used in a guide frame with the same rated current. 3WT 252 Operating Instructions, 12/2018, 9239 0020 176 06 Glossary Safe OFF This additional function prevents the Circuit breaker from closing and fulfills the isolation condition in the OFF position to IEC 60947-2: "Mechanical OFF" button pressed Main contacts open Withdrawable Circuit breakers: racking handle removed The various interlocking conditions are fulfilled Shunt release (F1, F2) For remotely opening the Circuit breaker and blocking it against closing. Shutters Shutters are molded-plastic plates for covering live main conducting paths in the guide frame (shock-hazard protection). If the Circuit breaker is racked to the disconnected position, the shutters are moved over the uncovered contact gaps. Spring charging lever The stored-energy spring mechanism is charged by means of a series of pump movements (five actuations of charging lever). Stored-energy spring mechanism Unit with spring energy store (mechanical energy). The spring is charged by means of the spring charging lever or motorized operating mechanism and maintained in a charged state by means of latches. When these latches are released, the stored energy is routed to the switching contact and the Circuit breaker closes. Switching position signaling switch This auxiliary switch is actuated depending on the switching status of the Circuit breaker. Tripped signaling switch Group signal for overload, short-circuit, and ground-fault tripping by means of microswitch. Undervoltage release (delayed) For remotely opening and interlocking the Circuit breaker. Voltage dips must not cause the Circuit breaker to open. 3WT Operating Instructions, 12/2018, 9239 0020 176 06 253 Glossary Undervoltage release (instantaneous/short-time delay) For remotely opening and interlocking the Circuit breaker as well as for using the Circuit breaker in EMERGENCY OFF circuits (to EN 60204-1 / DIN VDE 0113 Part 1) in conjunction with a separate EMERGENCY OFF device. Brief voltage dips (td < 80 ms for instantaneous undervoltage release, td < 200 ms for short-time delay undervoltage release) must not cause the Circuit breaker to open. Use of tools Buttons located under a cover and that can be accessed through a hole (diameter 6.35 mm) can only be actuated by means of a suitable rod. 3WT 254 Operating Instructions, 12/2018, 9239 0020 176 06