(c) Siemens AG 2016 Monitoring Devices SENTRON Configuration Manual Edition 10/2015 siemens.com/lowvoltage (c) Siemens AG 2016 (c) Siemens AG 2016 Monitoring Devices 2 Introduction 34 Monitoring devices for electrical values 5SV8 residual current monitors 5TT3 voltage relays 5TT3 voltage and frequency relays 5TT6 current relays 5TT3 reverse power relays 5TT3 fuse monitors 5TT3 phase and phase sequence monitors 5TT3 insulation monitors for industrial applications 7LQ3 monitors for medical premises 53 55 57 59 60 62 Monitoring devices for plants and equipment 5TT3 fault signaling units 5TT5 EMERGENCY STOP modules 5TT3 level relays 5TT3 line circuit relays 5TT3 p.f. monitors 5TT3 motor protection relays 5 11 19 22 27 28 29 31 For further technical product information: Siemens Industry Online Support: www.siemens.com/lowvoltage/productsupport . Entry type: Application example Certificate Characteristic Download FAQ Manual Product note Software archive Technical data Siemens * 10/2015 (c) Siemens AG 2016 Monitoring Devices Introduction Page Application Standards Used in Non-residential buildings Residential buildings Industry Overview Devices 5SV8 residual current monitors 5 To increase system availability and operating safety through continuous monitoring of residual current in electrical systems and signaling if a defined threshold is exceeded. IEC 62020; EN 62020 -- Modular residual current devices (MRCD) 5 The MRCD is a modular residual current DIN EN 60947-2 device type for personnel and fire (Appendix M), protection. IEC 60947-2 (Appendix M) -- 5TT3 voltage relays 11 Monitoring the voltage of emergency lighting in public buildings, short-time failures of 20 ms, for ensuring operational parameters for devices or system components or monitoring the neutral conductor for breaks. IEC 60255; DIN VDE 0435-303; DIN VDE 0108; DIN VDE 0435; DIN VDE 0633 -- 5TT3 voltage and frequency relays 19 The voltage and frequency relay monitors the status of the grid in the case of in-plant generation systems. Violation of an upper or lower limit results in shutdown and disconnection of the generation system from the grid. This ensures a stable incoming supply system. IEC/EN 60255-1; IEC/EN 61000; VDE-AR-N-4105 5TT6 current relays 22 Monitoring of emergency and signal lighting and motors. IEC 60255; DIN VDE 0435-303 -- Reverse power relays are used in power IEC 50255; supply systems, e.g. photovoltaic, wind DIN VDE 0435-303 power, water power and unit-type cogenerating stations, to control the reverse power. They prevent voltage being returned from the grid and causing damage if the infeed system itself fails or is damaged. Monitoring devices for electrical values All current relays can be short-time overloaded and connected either with direct measurement or through transformers. 5TT3 reverse power relays 2 Siemens * 10/2015 27 (c) Siemens AG 2016 Monitoring Devices Application Standards Used in Industry 5TT3 fuse monitors Page Residential buildings Devices Non-residential buildings Introduction 28 Monitoring of all types of low-voltage fuses. IEC 60255; DIN VDE 0435 -- For the visual signaling of phase failures IEC 60255; or phase sequences in three-phase DIN VDE 0435 systems. -- -- Can be used in asymmetric systems afflicted with harmonics and regenerative feedback motors. 5TT3 phase and phase sequence monitors 29 The phase sequence is arbitrary. The device is also suitable for 1, 2 or 3-phase operation. 5TT3 insulation monitors for industrial applications 31 To increase system availability and IEC 60255; operating safety through continuous IEC 61557 monitoring of the isolation resistance in non-grounded direct voltage or AC voltage systems. -- -- 7LQ3 monitors for medical premises 34 For the insulation monitoring of a medical IT system or load current monitoring of an IT system transformer for a non-permissible temperature rise. EN 61557-8; IEC 61557-8; DIN VDE 0100-710; IEC 60364-7-710 -- -- IEC 60255, DIN VDE 0435-303 -- -- Monitoring of the voltage supply with automatic switchover. Monitoring devices for plants and equipment 5TT3 fault signaling units 53 Evaluation and display of fault alarms and alarm signals for monitoring industrial plants and control systems. With 4 inputs and connections for 39 expansion fault signaling units. 5TT5 EMERGENCY STOP modules 55 For EMERGENCY-OFF switching in According to the accordance with the Directive 98/37/EC Machinery Directive on Safety of Machines. Safe types of 98/37/EC; EN 954-1 circuits for machines, plants or test stations in industrial, commercial and private enterprise applications. Siemens * 10/2015 3 (c) Siemens AG 2016 Monitoring Devices Application Residential buildings Industry Devices 4 Page Non-residential buildings Introduction 5TT3 level relays 57 Control of liquid levels in containers with IEC 60255, 3 electrode connections for 1-step and DIN VDE 0435 2-step level control. High immunity to interference of the measuring circuit isolated from the system. -- 5TT3 line circuit relays 59 For disconnecting the voltage of unused lines when loads are disabled. IEC 60255, DIN VDE 0435 -- -- 5TT3 p.f. monitors 60 For the monitoring of asynchronous motors for underload and no-load operation, e.g. fan monitoring in the case of V-belt breakage, filter blockages, pump monitoring in the event of valve closure or dry runs. IEC 60255, IEC 61557 -- -- 5TT3 motor protection relays 62 For the prevention of thermal motor overloads, e.g. due to high switching frequency, single-phasing, disabled cooling or excessive ambient temperatures. With detection of wire breaks in the sensor circuit. IEC 60255, DIN VDE 0435 -- -- Siemens * 10/2015 Standards Used in (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5SV8 residual current monitors Overview Benefits Plant and operating safety are becoming increasingly important alongside the protection of personnel. Shutdowns due to the unexpected tripping of protective devices cause high costs. However, it is possible to detect residual currents in the electrical installation before the protective device responds. Residual current devices (RCD) Residual current monitors (RCM) monitor residual current in electrical installations and issue a signal when the residual current exceeds a set value. RCMs are used primarily in plants where a fault should result in a signal, but not in disconnection. This enables plant operators to detect faults and eliminate their causes before the protective devices disconnect the installation, which increases plant and operating safety and cuts costs. * Higher plant availability and operating safety through permanent monitoring of residual currents * Adjustable limit values for residual current and response time enable timely detection and signaling - plant shutdowns are often avoidable * Devices for every application: The summation current transformers are available in various sizes; the RCMs can be used optionally for signaling and/or switching * Additional fire protection can be implemented using the monitoring system Modular residual current devices (MRCD) Modular residual current devices (MRCD) monitor residual currents in electrical systems and trip the MCCB via a shunt or UVR after an adjustable advance warning if the residual current exceeds a defined value. See accessories for molded case circuit breakers in Catalog LV 10, chapter "Molded case circuit breakers". This makes it possible for you to offer molded case circuit breakers with personnel and fire protection in compliance with EN 60947-2 (Appendix M) (also as a retrofit). Summation current transformer The summation current transformer detects all conductors required to conduct the current, including the neutral conductor where applicable. In a fault-free system, the magnetizing effects of the conductors through which current is flowing cancel each other out for the summation current transformer, i.e. the sum of all currents is zero. If a residual current is flowing due to an insulation fault, a residual magnetic field is left in the core of the transformer and produces a voltage. This voltage is evaluated using the electronics of the RCM/MRCD. The switched contact can be used to operate an acoustic/optical signaling device, a higher-level control system or a circuit breaker for example. Residual current n 100 % n Disconnection n I202_16044 50 % Alarm Time t Time characteristic of the rated residual current n Siemens * 10/2015 5 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5SV8 residual current monitors Technical specifications 5SV8000-6KK 5SV8001-6KK 5SV8200-6KK EN 62020, IEC 62020 Standards DIN EN 60947-2 (Appendix M), IEC 60947-2 (Appendix M) -- UL Approvals 5SV8101-6KK Rated operational voltage Ue V AC 230 230 from a 1-phase auxiliary voltage source (also externally) * Frequency Hz 50/60 Rated residual current n * Type A A 0.03 ... 3 0.03 ... 3 0.03 ... 3 * Type AC A >3 5 ... 30 5 ... 30 0.03 ... 3 (default setting: 30 mA) -- Response time t s 0.02 ... 5 0.02 ... 10, INS, SEL1) 0.02 ... 10, INS, SEL1) n = 30 mA: INS instantaneous n > 30 mA: INS - SEL - 0,06 ... 101) (default setting INS) 1 x alarm Relay contacts * Rated voltage * Rated current V AC A 230 6 Summation current transformer mm 20 ... 210 Maximum cable length RCM/CT (shielded cable) m 10 Conductor cross-section mm2 1.5 1 x pre-alarm, 1 x alarm 230 6 1 x pre-alarm, 4 x alarm 230 6 1 x alarm, 1 x tripping operation 230 6 35 ... 210 0.125 ... 2.08 Test/Reset Yes/Yes External tripping operation/ external reset --/Yes Yes/Yes Yes/Yes Yes/Yes 2 3 3 3 Mounting width MW Degree of protection * Contacts * Front Operating temperature 1) INS: Instantaneous, SEL: Selective. 6 Siemens * 10/2015 IP20 IP41 C -10 ... +50 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5SV8 residual current monitors 1 Standard DIN rail 2 Residual current device 3 Trip element 4 Molded case circuit breaker 5 Summation current transformer 4 3 5 2 I201_18988 1 5SV8101-6KK (approved configurations) 2 5SV8101-6KK 1 EN 60715 - TH35 - 7.5 35 - 15 5 5SV8702-0KK 5SV8703-0KK 5SV8704-0KK 5SV8705-0KK 5SV8706-0KK 35 mm 70 mm 105 mm 140 mm 210 mm 5SV8902-1KK 5SV8903-1KK 5SV8904-1KK 5SV8905-1KK 5SV8906-1KK 4 3 3 3VL17... 3VL9400-1ST00 3VL9400-1UP00 3VL27... 3VL9400-1ST00 3VL9400-1UP00 3VL37... 3VL9400-1ST00 3VL9400-1UP00 3VL47... 3VL9400-1ST00 3VL9400-1UP00 3VA20... 3VA21... 3VA22... 3VA9988-0BL30 3VA9988-0BL32 3VA9988-0BL33 3VA9908-0BB11 3VA9908-0BB20 3VA9908-0BB24 3VA9908-0BB25 3VA10... 3VA11... 3VA9988-0BL30 3VA9988-0BL32 3VA9988-0BL33 3VA9908-0BB11 3VA9908-0BB20 3VA9908-0BB24 3VA9908-0BB25 Dimensional drawings I202_116027 45 67 85 45 67 85 I202_16028 Residual current monitor 44 36 6 44 54 68 RCM analog, 5SV8000-6KK 6 68 RCM digital, 5SV8001-6KK, 5SV8200-6KK, MRCD, 5SV8101-6KK Siemens * 10/2015 7 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5SV8 residual current monitors Summation current transformer 32 Summation current transformer, 5SV8700-0KK Summation current transformer, 5SV8701-0KK A 33 Type F I202_16031 G B OE C 6,5 Dimen- A sions B C D E F G 5SV8702-0KK 100 79 26 49 35 35 43 5SV8703-0KK 130 110 32 66 70 52 57 5SV8704-0KK 170 146 38 94 105 72 73 5SV8705-0KK 230 196 49 123 140 97 98 5SV8706-0KK 299 284 69 161 210 141 142 Type Rated current Maximum current1) 5SV8700-0KK 40 A 240 A 5SV8701-0KK 63 A 380 A 5SV8702-0KK 80 A 480 A 5SV8703-0KK 200 A 1200 A 5SV8704-0KK 250 A 1500 A 5SV8705-0KK 500 A 3000 A 5SV8706-0KK 600 A 3600 A 1) 46 D 70 O30 O59 24 O20 O46 I202_16030 60 I202_16029 30 32 Transient starting current, up to max. 2s 8 Summation current transformer, 5SV8702-0KK, 5SV8703-0KK, 5SV8704-0KK, 5SV8705-0KK, 5SV8706-0KK OK OK OK I201_19465 OK Summation current transformer, 5SV8702-0KK, 5SV8703-0KK, 5SV8704-0KK, 5SV8705-0KK, 5SV8706-0KK 8 Siemens * 10/2015 All active conductors (including the neutral) must be routed through the transformer. Cables that are not routed through the transformer must keep to a minimum clearance of 20 cm. Moreover, the transformers must have an inside diameter that is at least 1.5 times larger than the outside diameter of the conductors that pass through it. (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5SV8 residual current monitors Circuit diagrams Residual current monitor L N S/R 10 11 12 13 14 15 Reset T4 T3 T2 1S1 1S1 1S2 1S1 1S2 1S1 1S2 1 2 3 4 5 6 7 89 1S2 I202_16040a Test T1 RCM digital, 4 channels, 5SV8200-6KK S/R = Set/Reset More information Switch positions RCM digital, 5SV8001-6KK: Setting Alarm contact/alarm Trip contact/trip Alarm contact/alarm Trip contact/trip "Standard" "Standard" "+" "+" Without power supply 4 5 6 15 14 13 4 5 6 4 5 6 15 14 13 4 5 6 4 5 6 4 4 5 6 4 With power supply Over limit CT disconnection 15 14 13 5 6 15 14 13 5 6 15 14 13 Siemens * 10/2015 9 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5SV8 residual current monitors RCM digital, 4 channels, 5SV8200-6KK: Alarm contact/alarm Trip contacts/trip Trip contacts/trip Setting "Standard" "Standard" "+" Without power supply 10 1 C1: 14 C2: 14 C3: 8 C4: 8 C1: 13 C2: 15 C3: 7 C4: 9 C1: 14 C2: 14 C3: 8 C4: 8 C1: 13 C2: 15 C3: 7 C4: 9 With power supply 10 1 C1: 14 C2: 14 C3: 8 C4: 8 C1: 13 C2: 15 C3: 7 C4: 9 C1: 14 C2: 14 C3: 8 C4: 8 C1: 13 C2: 15 C3: 7 C4: 9 Over limit 10 1 C1: 14 C2: 14 C3: 8 C4: 8 C1: 13 C2: 15 C3: 7 C4: 9 C1: 14 C2: 14 C3: 8 C4: 8 C1: 13 C2: 15 C3: 7 C4: 9 CT disconnection 10 1 C1: 14 C2: 14 C3: 8 C4: 8 C1: 13 C2: 15 C3: 7 C4: 9 C1: 14 C2: 14 C3: 8 C4: 8 C1: 13 C2: 15 C3: 7 C4: 9 10 Siemens * 10/2015 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT3 voltage relays Overview They are available as undervoltage, overvoltage and under / overvoltage relays. The devices are equipped with different functions, depending on their intended use, and comply with the pertinent regulations. Voltage relays are used for device and plant protection, supplying safety light devices and the detection of N-conductor breaks and short-time voltage interruptions. Technical specifications 5TT3400 5TT3401 5TT3402 5TT3403 Rated operational voltage Uc V AC 230/400 Operating range (overload capability) x Uc 1.1 400 Hz 50/60 0.9/0.95 0.7/0.85 V; mA 10; 100 Setting accuracy % -- Approx. 5 ... 10 -- Repeat accuracy % -- 1 -- At L1 or L2 or L3 ms 100 -- N-conductor monitoring 4 % hysteresis 0.7 ... 0.95 0.9 ... 1.3 Between coil/contact kV 4 Contacts contact (AC-11) A 4 Electrical isolation Creepage distances and clearances Actuator/contact mm 3 5.5 Rated impulse withstand voltage Uimp Actuator/contact kV > 2.5 >4 Terminals Screw (Pozidriv) Conductor cross-sections * Rigid, max. * Flexible, with end sleeve, min. Permissible ambient temperature Approx. 5 ... 10 1 -Yes Rated insulation voltage Ui Climatic withstand capability 5TT3195 1.35 x Uc Minimum contact load Phase failure detection 5TT3194 ON-switching OFF-switching Rated frequency Phase asymmetry 5TT3406 IEC 60255; DIN VDE 0435-110, -303 Standards Response values 5TT3404 5TT3405 -- 1 mm2 mm2 2 x 2.5 0.5 C -20 ... +60 Acc. to EN 60068-1 20/60/4 5TT3196 IEC 60255; DIN VDE 0435 Standards Rated operational voltage Uc V DC 24 Rated power loss Pv * Coil/drive * Contacts1) per pole VA VA 0.6 0.8 Hysteresis % 4 Response values x Uc * Undervoltage * Overvoltage Undervoltage Overvoltage Residual ripple tripping Uc Infinitely variable % 0 ... 15 Overload capability 33 V DC 35 V DC 45 V DC ms ms Continuous 500 10 mm 4 Input/output kV > 2.5 V/mA 24/300 AC-11 AC-1 A A 1 4 Creepage distances and clearances Rated impulse withstand voltage Uimp Minimum contact load Rated operational current Ie 0.82 1.18 contact Contacts Electrical service life In switching cycles at Ie 5 x 105 Terminals Screw (Pozidriv) 1 Conductor cross-sections * Rigid, max. * Flexible, with end sleeve, min. Permissible ambient temperature Climatic withstand capability 1) Acc. to EN 60068-1 mm2 mm2 2 x 2.5 1 x 0.5 C -20 ... +60 20/60/4 For rated operational current. Siemens * 10/2015 11 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT3 voltage relays 5TT3407 5TT3408 5TT3410 IEC 60255; DIN VDE 0435-303 Standards Rated operational voltage Uc V AC 230/400 Operating range (overload capability) x Uc 1.1 Rated frequency Hz 50/60 1.35 1.2 Back-up fuse Terminals L1/L2/L3 A 2 Response values Overvoltage: OFF-switching ON-switching x Uc --- 0.9 ... 1.3 4 % hysteresis --- Undervoltage: OFF-switching ON-switching x Uc 0.8 0.85 0.7 ... 1.1 4 % hysteresis --- V; mA 10; 100 Setting accuracy % Approx. 5 ... 10 Repeat accuracy % 1 At L1, L2 or L3 ms 20 100 -- OFF delay s -- 0.1 ... 20 0.1 ... 20 Automatic reclosing delay s 0.2 ... 2 -- -- Between coil/contact kV 4 Contacts contact (AC-11) A 3 1 4 Electrical isolation Creepage distances and clearances Contact/contact Actuator/contact mm mm -4 4 -5.5 Rated impulse withstand voltage Uimp Actuator/contact kV >4 Rated operational power Ps AC operation: 230 V and p.f. = 1 230 V and p.f. = 0.4 VA VA 2000 1250 --- --- DC operation: Ue = 24 V and Ie = 6 A Ue = 60 V and Ie = 1 A Ue = 110 V and Ie = 0.6 A Ue = 220 V and Ie = 0.5 A W W W W max. 100 max. 100 max. 100 max. 100 ----- ----- Minimum contact load Phase asymmetry Phase failure detection Rated insulation voltage Ui Screw (Pozidriv) Terminals Conductor cross-sections * Rigid, max. * Flexible, with end sleeve, min. Permissible ambient temperature Humidity class 1 mm2 mm2 2 x 2.5 0.5 C -20 ... +60 F Acc. to IEC 60068-2-30 5TT3411 5TT3412 Rated operational voltage Uc V AC 230 230/400 Overload capability x Uc 1.15 1.1 1.15 Rated frequency Hz 50/60 Response values Minimum contact load Phase failure detection 2 % hysteresis 4 % hysteresis 5% x Uc 0.9 0.9 0.85 V/mA 10/100 ms -- 100 500 -- Yes -- ON-switching OFF-switching At L1, L2 or L3 5TT3414 N-conductor monitoring Rated insulation voltage Ui Between coil/contact kV Contacts AC-15 NO contacts 3 2 -- AC-15 NC contacts 2 1 -- AC-15 CO contacts -- 1 1 Electrical service life in switching cycles AC-15, 1 A, 230 V AC 5 x 105 1 x 105 Rated impulse withstand voltage Acc. to IEC 60664-1 4 6 2 2 2 -- -3.5 mm2 mm2 2 x 2.5 2 x 1.5 1x4 1 x 2.5 C -20 ... +60 -25 ... +60 kV Pollution degree Screw (Pozidriv) - Screw (slot) Terminals 4 -- Conductor cross-sections * Rigid * Flexible, with end sleeve Permissible ambient temperature Climatic withstand capability 12 Siemens * 10/2015 Acc. to EN 60068-1 20/060/04 5TT3415 2 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT3 voltage relays Characteristic curves Timing interval of 5TT3410 N-conductor monitors Timing interval of 5TT3400... 5TT3406 undervoltage relays L1, L2, L3 Uc I201_07516b C Uab I201_07033b L3 L2 L1 11-14 11-12 N Uab= Release value 11-14 11-12 PEN conductor interruption Timing interval of 5TT3408 under/overvoltage relays Timing interval of 5TT3407 short-time relays U Without fault storage I201_07271c I201_07270b >U Hysteresis UH Uc 0 Hysteresis <U 11-14 11-12 Good signal Good signal L1, L2, L3 t tv Response time tv 11-14 11-12 t With fault storage "RESET" "RESET" T 0 11-14 11-12 Good signal tv Response time LED green On LED <U red On LED >U red On t Off Off Good signal tv Off tv: Adjustable automatic reclosing delay 0.2 to 20 s t: Adjustable OFF delay 0.1 to 20 s The undervoltage relay switches at a phase asymmetry of approx. 6 to 8 %, regardless of the response values for undervoltage. The above diagram shows the timing interval for undervoltage or asymmetry. The undervoltage relay switches at a phase asymmetry of approx. 6 to 8 %, regardless of the response values for undervoltage. The above diagram shows the timing interval for undervoltage. Siemens * 10/2015 13 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT3 voltage relays 5TT3415 undervoltage relays 5TT3411 and 5TT3412 voltage relays For characteristic curves of the 5TT3411 and 5TT3412 voltage relays, see "Monitors for medical premises" from page 34. U Hysteresis Us L1, L2, L3 5TT3415 TEST LED green LED yellow 11-14 21-24 11-12 21-22 t=1min I202_01419 t>0.5s Dimensional drawings 5TT34, 5TT3194 and 5TT3195 voltage relays L1 L2 L3 L1 N L1 L2 L3 N L1 L2 L3 N 12 12 12 14 11 24 21 14 11 24 21 14 11 24 21 18 36 36 36 5TT3400 5TT3401 22 22 12 14 11 5TT3402 5TT3403 22 5TT3404 5TT3405 5TT3407 5TT3408 I201_11515 45 90 L1 L2 5 43 64 5TT3194 5TT3195 5TT3406 5TT34 undervoltage relays / / / / 1 / 1 / 5TT3410 N-conductor monitors 12 45 90 e+ f 2324 18 14 5 43 55 Siemens * 10/2015 36 5 43 64 5TT3411 and 5TT3412 voltage relays I201_06552 5TT3196 DC voltage monitors 1112 22 14 11 24 21 I201_11516 ,B 45 90 L1 L2 L3 N For dimensional drawings of the 5TT3411 and 5TT3412 voltage relays, see "Monitors for medical premises" from page 34. (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT3 voltage relays Circuit diagrams N 11 5TT3194 5TT3195 L1 L2 L3 14 12 e(+) 24 12 f 21 5TT3402 5TT3403 5TT3404 5TT3405 5TT3406 5TT3407 5TT3408 5TT3410 N 23 11 5TT3196 L1 L2 L3 11 12 14 11 5TT3400 5TT3401 L1 L2 L3 I202_01420 L1 L2 L3 14 12 24 22 N N 5TT3414 5TT3415 12 14 22 24 11 21 I202_01421 Graphical symbols 5TT34 undervoltage relays L1 L2 L1 L2 N L3 N L3 L1 L2 L3 N N 12 11 12 11 14 14 22 21 24 I202_01415 L1 L2 L3 21 22 24 11 12 14 11 12 14 5TT3414 5TT3415 5TT3411 and 5TT3412 voltage relays For circuit diagrams of the 5TT3411 and 5TT3412 voltage relays, see "Monitors for medical premises" from page 34. Typical circuit for 5TT3195, 5TT340 voltage relays 1, 2, 3-phase operation against N L1 L2 L3 N L1 14 12 24 22 11 21 One-phase operation L1 L2 L3 L4 L2 L1 L2 L3 N 14 12 24 22 11 Two-phase operation 21 I201_07596c N I201_07595c I201_07594c L1 L1 L2 L3 N 14 12 24 22 11 21 Three-phase operation Typical circuit for 5TT3196 DC voltage monitors L2 L1 1,18 x U c 5TT3 196 e+ 12 24 0,82 x U c Load f 11 23 24 V DC I201_07274a 23-24 11-12 I201_07035a L3 If 0.82 x Uc is fallen short of, or 1.18 x Uc exceeded, or if the residual ripple is too high, the 11/12 contact closes and the 23/24 contact opens. Siemens * 10/2015 15 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT3 voltage relays Typical circuit for 5TT3404, 5TT3405, 5TT3406, 5TT3408 under/overvoltage relays Typical circuit for 5TT3401, 5TT3403, 5TT3405 undervoltage relays Emergency power supply L1' L2' L3' N' Standard power supply L1 L2 L3 N PE L1 L2 L3 N Phase failure 3 AC 230 V I201_07273d L1 L2 L3 N L1 L2 L3 L4 K2 14 12 24 22 11 K1 11 K1 21 21 K2 I201_07272d K1 14 12 24 22 M Emergency lighting Standard lighting One application of undervoltage relays is the switching to a safe power supply after a fault. Buildings are distinguished according to use, such as business premises, exhibition areas or guest houses. These are all covered generically as rooms/buildings "where people meet". There is a fault if the voltage of the general power supply drops for 0.5 seconds > 15 % in relation to the rated voltage (i.e. 195 V at 230 V). In this case the lighting must be switched to a safety power supply after 0.5 to 15 s depending on the type of use. A safety power supply may be: a battery system, a generating set or a quick-starting standby generating set. 16 Siemens * 10/2015 These voltage relays can only be used for 3-phase operation. They monitor not only under- and overvoltages in accordance with their description, but also reverse voltage, asymmetry and N-conductor breaks. (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT3 voltage relays Typical circuit for 5TT3407 short-time relays L1 L2 L3 N Typical circuit for 5TT3407 short-time relays 3 AC 230 V L1 L2 L3 N 230 V 3 AC Reset L1 L2 L3 N 14 12 24 22 Reset K1 K1 L1 L2 L3 N 21 I201_07598d 11 14 12 24 22 11 1 2 3 4 21 5TT3407 7KT5883 I201_07597d In the case of sensitive technical sequences, it is often not possible to tell whether this interrupt has interfered with the process sequence. The circuit disconnects the power supply, which can then be switched back by using the RESET pushbutton. In simple cases, it may be sufficient for a short-time interruption to be registered without the need to disconnect the power supply. In the case of a short-time interruption, this is counted by the pulse counter. The pulse counter can be reset if required. Typical circuit for 5TT3410 N-conductor monitors L1 F1 L2 F2 L3 N PE F3 K1 S1 Test and service switch L1 L2 L3 11 N 14 I201_07517b F4 F5 F6 5TT3410 K1 Siemens * 10/2015 17 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT3 voltage relays More information 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 194 195 196 400 401 402 403 404 405 406 407 408 410 411 412 Overvoltage -- -- -- -- -- -- -- -- -- Undervoltage -- -- -- -- -- Monitoring of safety light devices -- -- -- -- -- -- -- -- -- -- -- -- -- Monitoring of medical premises -- -- -- -- -- -- -- -- -- -- -- -- -- Monitoring of N-conductor -- -- -- -- -- -- -- -- -- -- -- -- -- Monitoring of short-time interruptions -- -- -- -- -- -- -- -- -- -- -- -- -- -- 1, 2, 3-phase to N -- -- -- -- -- -- -- 3 phases to N -- -- -- -- -- -- -- -- -- -- Asymmetry detection -- -- -- -- -- -- -- -- N-conductor monitoring -- -- -- -- -- -- -- -- Reverse voltage detection -- -- -- -- -- -- -- -- -- Short-time failure detection -- -- -- -- -- -- -- -- -- -- -- -- -- -- Phase failure detection -- -- -- -- -- Switching thresholds: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 0.7/0.9 x Uc, non-adjustable -- -- -- -- -- -- -- -- -- -- -- -- 0.8/0.85 x Uc, non-adjustable -- -- -- -- -- -- -- -- -- -- -- -- -- -- 0.85/0.95 x Uc, non-adjustable -- -- -- -- -- -- -- -- -- -- -- -- 0.7 ... 0.95 x Uc, 5 % hysteresis, adjustable -- -- -- -- -- -- -- -- -- -- -- -- -- -- 0.7 ... 1.1 x Uc, 4 % hysteresis, adjustable -- -- -- -- -- -- -- -- -- -- -- -- -- -- 0.9 ... 1.3 x Uc, 4 % hysteresis, adjustable -- -- -- -- -- -- -- -- -- -- -- -- Adjustable time delay -- -- -- -- -- -- -- -- -- -- -- -- -- -- Contact: 1 CO -- -- -- -- -- -- -- -- -- -- -- -- -- Contact: 2 CO -- -- -- -- -- Contact: 1 CO, 1 NO, 1 NC -- -- -- -- -- -- -- -- -- -- -- -- -- -- Contact: 1 NO, 1 NC -- -- -- -- -- -- -- -- -- -- -- -- -- -- Contact: 2 NO, 2 NC -- -- -- -- -- -- -- -- -- -- -- -- -- -- General voltage monitoring Reverse voltage detection For general device and plant protection, voltage relays with switching thresholds of 0.7 x Uc, i.e. 161 V are used. If they have fixed, non-changeable switching thresholds, they switch back to normal operation at 0.85 x Uc, 195 V or at 0.9 x Uc, 207 V, depending on the version. If they have adjustable thresholds, they switch back to normal operation with 4 % hysteresis, 9 V. If a phase fails, the motors feed a reverse voltage to the missing phase. However, voltage relays with reverse voltage detection will disconnect in this case because they are monitoring the phase angle. 1, 2 or 3 phases to N or 3 phases to N If a phase fails completely, the voltage relays disconnect with a delay as specified in the technical specifications. All voltage relays require an N-conductor. Devices for 1, 2 or 3 phases to N can be used for 1-, 2-, or 3-phase operation. Devices for 3 phases to N require all three phases, whereby the sequence in which they are connected is irrelevant. Asymmetry detection If different voltages occur in a three-phase network, this is called phase asymmetry. Some voltage relays detect an asymmetry of approx. 6 to 8 % of the phase-to-neutral voltage, i.e. approx. 14 to 16 V and switch off. This type of operation is used for example to protect motors against a "skew". N-conductor monitoring An N-conductor break causes a skew, depending on the phase load. In extreme cases, this could cause 400 V to be applied to a phase and destroy the connected devices. Each voltage relay with asymmetry detection is tripped by an N-conductor break, if the phase displacement is at least 14 to 18 V. The 5TT3410 N-conductor monitor detects a phase displacement of 5 %, which is roughly 12 V. This provides earlier protection against overvoltage for connected devices. The N-conductor monitor does not react if the voltage drops or rises in all phases simultaneously; or if a phase is swapped with the N-conductor. 18 Siemens * 10/2015 Phase failure detection Short-time failure detection Short-time failures upwards of 20 ms cannot be detected with conventional voltage relays. However, they can occur in the case of system transfers or lightning strikes and can lead to uncertainty for sensitive process sequences or measuring procedures. The 5TT3407 short-time voltage relay has a reset function that allows a procedure to be permanently interrupted after a fault. Back-up fuse The voltage relays do not require a back-up fuse as device protection. However, they are often installed in junctions, i.e. in main supply systems with high fusing. In this case, the supply lead to the voltage relay must be short-circuit resistant. The back-up fuse only serves as line protection. 5TT3411 and 5TT3412 voltage relays For control elements of the 5TT3411 and 5TT3412 voltage relays, see "Insulation monitors for medical premises" from page 34. (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT3 voltage and frequency relays Overview Application L1 L2 L3 N Low-voltage system 3-phase Safe external disconnection, e.g. via ripple control receiver L1 L2 L3 N X1 CG 1 B1 11 21 31 KA CG 2 KE B2 12 14 22 24 32 34 Coupling switch 1 Q1 Q2 The voltage and frequency relay monitors the status of the grid in the case of in-plant generation systems. Violation of an upper or lower limit results in shutdown and disconnection of the generation system from the grid. Connection or automatic reconnection of the generation system to the grid only takes place when the grid frequency and the grid voltage have remained within their respective tolerance ranges without interruption for the duration of an adjustable time delay tW. Following shutdown due to a brief interruption, re-connection takes place when the grid frequency and grid voltage have remained within the tolerance range for 5 s without interruption. I202_02440 X2 Coupling switch 2 Inverters Generator(s) Generation system CG = clock-pulse generator Enable via external contact L1 L2 L3 Low-voltage system N Benefits L1 L2 L3 N X1 11 21 31 KA CG 2 B1 KE B2 X2 (+) enabled (-) 12 14 22 24 32 34 disabled Coupling switch 1 Q1 I202_02441 * Clearance certification of the German Employer's Liability Association (Energy, Textile, Electrical and Media Products) * Default settings in accordance with VDE-AR-N-4105 * The voltage and frequency relay meets the high requirements of VDE AR-N 4105 * It can be used both for centralized and integrated grid and plant protection * The latching rotary switches enable fast and easy setting of the required values * An illuminated LCD display provides plant status information * The voltage and frequency relay ensures single-fault tolerance as stipulated in the VDE-AR-N 4105 application guide * Passive procedure for detecting islanding external CG Q2 Coupling switch 2 Inverters Generator(s) Generation system CG =clock-pulse generator Enable using external voltage 24 V AC, 40 ... 400 Hz Siemens * 10/2015 19 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT3 voltage and frequency relays Technical specifications Voltage and frequency relays 5TT3426 5TT3427 IEC/EN 60255-1; IEC/EN 61000; VDE-AR-N-4105 Standards Supply voltage Uv V AC 3 x 85 ... 288 Supply voltage B1/B2 V AC 24 (at 40 ... 400 Hz) Rated operational voltage Uc V AC 230/400 Rated impulse withstand voltage Acc. to IEC 60664-1 * Contact 31, 32, 34 * KA, KE and measuring circuit * Pollution degree kV kV 6 4 2 A 6 Temperature range C -20 ... +60 (in the range 0 C ... -20 C, there may be restrictions to the functionality of the LCD display) Conductor cross-sections * Rigid, flexible * Flexible with end sleeve * Multi-conductor connection 2 conductors of same cross-section mm2 mm2 mm2 0.5 ... 4 0.5 ... 2.5 0.5 ... 1.5 Recommended fuse Measuring inputs gG/gL Output relay Quiescent current Mode of operation Contacts * NO contacts * NC contacts AC15 AC15 A AC/V AC A AC/V AC 3/230 1/230 A AC 5 Switching cycles 300000 Rise in frequency Hz 50.2 ... 51.2 Drop in frequency Hz 47.0 ... 49.8 Rise in voltage * Phase/neutral * Phase/phase V AC V AC 253 ... 288 -- 438 ... 498 Drop in voltage * Phase/neutral * Phase/phase V AC V AC 184 -- 319 Mean rise in voltage over 10 minutes * Phase/neutral * Phase/phase V AC V AC 253 ... 267 -- 438 ... 462 Re-connection time tw sec 0 ... 600 Disconnection response time ms < 100 Connection condition * Frequency * Voltage % Hz 5 47.5 ... 50.05 Accuracy * Frequency * Voltage % ( 1 digit) % ( 1 digit) 1 0.02 Dimensions WxHxD 70 x 90 x 71 mm Thermal current Electrical service life * NO contacts 20 Siemens * 10/2015 AC15, 1A, AC230 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT3 voltage and frequency relays Dimensional drawings L2 L3 N KA KE 31 32 34 X1 B1 B2 X2 11 12 14 I202_02444 90 L1 21 22 24 71,8 L1 L2 7 L3 N 63 KA KE 31 32 34 L1 L2 L3 N KA KE 31 32 34 K3 U>>(%) f<(Hz) 110 112 47,0 47,5 47,8 114 115 116 125 120 118 Off 110 111 112 B1/ K1/ K3 KA/ B2 K2 KE 113 126 125 114 f>(Hz) 48,2 50,2 50,3 50,4 50,5 48,6 50,6 49,8 49,4 49,0 50,8 50,8 50,7 50,8 50,9 0 30 60 51,0 90 51,1 120 180 51,2 240 600 450 300 51,5 51,4 51,3 t w(s) U10m>(%) Mode >2s K3 >50,8 random B1/ K1/ K3 KA/ B2 K2 KE <50,9 f>(Hz) U>>(%) f<(Hz) 110 112 47,0 47,5 47,8 114 115 116 125 120 118 Off 110 111 112 113 126 125 114 U10m>(%) 50,2 50,3 50,4 50,5 48,6 50,6 49,8 49,4 49,0 50,8 50,8 50,7 50,8 50,9 0 30 60 51,0 90 51,1 120 180 51,2 240 600 450 300 51,5 51,4 51,3 t w(s) Mode >2s U>=80% f>(Hz) 48,2 >50,8 random <50,9 f>(Hz) U>=80% Test Test 5TT3 426 5TT3 427 X1 B1 B2 X2 K1 K2 11 12 14 21 22 24 X1 B1 B2 X2 I201_18954 K1 K2 11 12 14 21 22 24 I201_18955 5TT3427 5TT3426 Circuit diagrams L1 L2 L3 N U<> 10m> KA KE 31 32 34 Channel 1 tw 11 K1 f<> 12 14 31 Error K3 32 34 10m> Channel 2 tw K2 f<> X1 B1 B2 X2 21 22 24 11 12 14 I202_02439 U<> 21 22 24 5TT3426 and 5TT3427 Siemens * 10/2015 21 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT6 current relays Overview Current relays monitor single and three-phase systems for the flow of current, e.g. in emergency lighting installations, and the loading of motors. They are available as undercurrent, overcurrent and under/overcurrent relays. Technical specifications Standards Rated operational current Ic Rated operational voltage Uc Primary operating range Overload capability, continuous Overload capability, short-time Rated frequency Response values At 50 C ambient temperature max. 3 s A V AC x Uc A A 5TT6111 IEC 60255; DIN VDE 0435-303 1 ... 10 230 0.9 ... 1.1 15 20 Hz 50/60 Infinitely variable Permanent, 4 % hysteresis ON-switching OFF-switching 5TT6112 Switching delay tv Response time Infinitely variable Non-adjustable s ms 0.1 ... 20 Current corresponds to the rated operational power of the continuous-flow heater Minimum contact load Rated insulation voltage Ui Contacts contact (AC-15) Between coil/contact V; mA kV 10; 100 2.5 NO contacts NC contacts A A 3 1 Electrical isolation Creepage distances and Actuator/contact mm 3 Rated impulse withstand voltage Uimp Terminals Conductor cross-sections Actuator/contact Screw (Pozidriv) Rigid Flexible, with end sleeve kV Permissible ambient temperature Climatic withstand capability >4 1 max. mm2 2 x 2.5 2 min. mm 1 x 0.5 C Acc. to EN 60068-1 -20 ... +60 20/60/4 5TT6113 5TT6114 5TT6115 A A A A 4 ranges 0.1 ... 1 0.5 ... 5 1 ... 10 1.5 ... 15 Rated operational voltage Uc V AC 230 Primary operating range Overload capability, continuous Overload capability independent of measuring range x Uc A A 0.9 ... 1.1 20 30 Hz 50/60 Rated operational current Ic Max. 3 s Rated frequency Response values ON-switching OFF-switching Switching delay tv Infinitely variable s 0.1 ... 20 Response time Non-adjustable ms See: www.siemens.com/lowvoltage/manuals V; mA 10; 100 Between coil/contact kV 2.5 NO contacts NC contacts A A 5 1 Electrical isolation Creepage distances and Actuator/contact mm 3 Rated impulse withstand voltage Uimp Actuator/contact kV >4 Terminals Screw (Pozidriv) Conductor cross-sections Rigid Flexible, with end sleeve Minimum contact load Rated insulation voltage Ui Contacts contact (AC-15) Climatic withstand capability Siemens * 10/2015 Infinitely variable Permanent, 4 % hysteresis 1 max. mm2 2 x 2.5 min. mm2 1 x 0.5 C Permissible ambient temperature 22 5TT6120 IEC 60255; DIN VDE 0435-303 Standards Acc. to EN 60068-1 -20 ... +60 20/60/4 1 range 0.5 ... 5 15 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT6 current relays Dimensional drawings 5TT611 current relays 5TT6120 current relays L/i L/i A1 A2 N L/k Z2 Z3 Z1 Z4 Z2 Z3 Z1 Z4 12 14 12 12 11 14 11 24 21 14 11 24 21 36 36 A 1 A2 i A 1 A2 i1 k1 A 1 A2 i3 k3 k 45 90 k 18 22 22 12 5 43 5TT6113 5TT6114 42 72 64 5TT6111 5TT6112 32 14 11 24 21 34 31 44 41 5TT6115 I201_11517 22 I201_11518 45 90 i 43 55 5 5TT6120 Circuit diagrams Graphical symbols L i L k 14 12 > 11 N A1 A2 i > A1 A2 i < k 14 12 24 22 Z1 Z2 Z3 Z4 11 21 k 14 12 24 22 Z1 Z2 Z3 Z4 11 A1 A2 A1 A2 i k 14 12 24 22 >< 21 Z1 Z2 Z3 Z4 11 21 > 34 32 44 42 31 41 14 12 24 22 < 11 i1-i3 5TT6111 5TT6112 5TT6113 5TT6114 Typical circuit for 5TT6111 undercurrent monitors L1 230 V AC 5TT6115 21 k1-k3 5TT6120 Typical circuit for 5TT6114 overcurrent monitors Measurement with transformer I201_07522c N L1 3 AC 230/400 V I201_07560b L2 L3 N PE L/i L/k N 12 14 11 To the 5TT3460 or 5TT3461 fault signaling relay K1 K1 i A1 A2 12 14 k 11 22 24 21 5TT6114 PE M Siemens * 10/2015 23 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT6 current relays Typical circuit for 5TT6120 With direct measurement of up to 5 A for undercurrent/overcurrent measurement Typical circuit for 5TT6114 With direct measurement up to 15 A for overcurrent measurement L1 3 AC 230/400 V I201_07559b L2 L3 L3 N PE N PE I201_07561b K1 K1 K1 3 AC 230/400 V L1 L2 K1 min i A1 A2 12 14 k 11 i1 i2 22 24 i 3 A1 A2 12 14 k 1 k2 k 3 21 5TT6114 PE 11 max 22 24 32 34 21 31 42 44 41 5TT6120 M PE M More information Direct measurement, transformer measurement Response time All current relays can be connected with direct measurement or through transformers. N potential Versions 5TT6113 to 5TT6120 can be connected with a separate N potential. Current relays are not circuit-protective devices for lines. They switch with a delay in the ms range. Overload capability Independent of the set measuring range and set measured value, current relays can be permanently overloaded up to 15 A and 20 A; for 3 s; even up to 20 A and 30 A. Device overview 5TT6111 5TT6112 5TT6113 5TT6114 5TT6115 5TT6120 Undercurrent -- -- Overcurrent -- -- Single-phase -- Three-phase -- -- -- -- -- Separate N potential -- -- Measuring ranges: Jumper: 0.1 - 1 A Z1 - Z2 0.5 - 5 A Z1 - Z3 1 ... 10 A Z1 - Z4 1.5 - 15 A Z1 - Z3 - Z4 Can be programmed over jumpers -- --- -- --- - ---- -- -- - - - - Contacts 1 CO 2 CO Buildings/object-safe guiding lights In the approach corridors of planes, high buildings must be fitted with position lighting. The same planning instructions apply to the monitoring of this type of lighting and runway lighting as the monitoring of emergency lighting. Monitoring of emergency lighting with incandescent lamps The function of emergency lighting according to DIN VDE 0108 must be checked at regular intervals. The operational current is continuously monitored using current relays. The lighting can either be integrated in the general lighting system or just supplied on demand with emergency current. 24 Siemens * 10/2015 The current relay is set so that it switches on at the max. lamp current. If an incandescent lamp fails, a fault is signaled. Monitoring of motors If the warning is sent early enough, the fault can be eliminated before the motor starts to overheat and the circuit breaker switches the motor off. Current relays reliably safeguard the monitoring of fault-free running motors and, in some cases are more suitable than a voltage relay, which is geared more towards motor protection. (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT6 current relays Example: Screw conveyor Hard objects in screw conveyors, e.g. in sewage treatment plants, can often jam the conveyor system. Appropriately set, the current relay signals over its contact(s) that a hazardous situation has occurred and threatens to block the motor. Function charts for 5TT61 overcurrent relay signal UN I201_07508c t Example: Agitators As with the conveyor processes, changes to the viscosity can lead to an overload of the motors. N Example: Crane motor control system Hyst. The current monitoring of the main motor (hoisting motor) ensures that the electrical holding brake is not released until the main motor is in operation and the load is held. Example: Dust extraction t 1 In the interests of work safety and to protect against massive dust development, it is essential to ensure that the dust extraction system is working perfectly before a saw or sanding machine is switched on. 4 Fault 2 LED green On Off LED red On Off Planning the monitoring of an incandescent lamp Current relays have a hysteresis of approx. 4 %. The smallest lamp must not exceed the set measuring range by more than 8 %. Example: 12 lamps of 100 W each = 1200 W, which corresponds to a current of approx. 5.2 A. If a lamp fails, the current drops by 0.4 A. This 0.4 A corresponds to 8 % of the set measured value 5.2 A. tv tv 5TT61 overcurrent relay signal UN I201_07469b Response time t The response time of the fault signal is produced by the "adjustable switching delay" (see the technical specifications) and an additional delay, which is determined from the actual current and the set value. F Pickup ms Hyst. Dropout ms 1 10 250 2 70 70 5 120 30 10 180 15 20 220 10 30 240 12 F= N t 1 4 2 LED green On Off LED red On Off Fault Iact Imeas Iact: Instantaneously flowing current Imeas: Set current threshold value to be measured Pickup: With an overcurrent relay, the contact 11 - 14 (21 - 24) to the fault signal closes when the instantaneous current flowing is higher than the switching threshold. The relay picks up. Dropout: With an overcurrent relay, the contact 11 - 12 (21 - 22) to the fault signal closes when the instantaneous current flowing is higher than the switching threshold. The relay drops out. tv Siemens * 10/2015 25 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT6 current relays Function charts for 5TT6115 under/overcurrent relay signal UN I201_07472b t N Hyst. Hyst. t 1 4 Fault Fault 2 LED green On Off LED red On Off LED red On Off tv tv tv Contrary to all other current relays, a fault signal is always output over the contact 11 - 14 (21 - 24). The red LEDs indicate whether the signal is for an undercurrent or an overcurrent. 26 Siemens * 10/2015 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT3 reverse power relays Overview The 5TT3424 and 5TT3425 reverse power relays monitor the direction of the energy transport in an electric grid. This may be necessary where public grids and industrial grids intersect, e.g. when using emergency generators, motor-driven generators, etc. Technical specifications Reverse power relays 5TT3424 Rated voltage Un V AC 230, 3-phase systems without N Rated current In A 5 % 2 ... 20 Hysteresis % 12.5 of the set response value Rated frequency Hz 45 ... 65 Response delay tan s 0.2 ... 10, adjustable Response value 5TT3425 IEC 60255; DIN VDE 0435-303 Standards Reverse power 400, 1- or 3-phase systems without N 2 CO Contact arrangement Output 2 CO Contact arrangement Breaking capacity IEC 60947-5-1 * NO contacts * NC contacts * Acc. to DC 13 AC15 AC15 Thermal current Electrical service life IEC 60947-5-1 * NO contacts AC 15, 3A, 230 AC Permissible switching frequency Short-circuit strength, max. melting fuse A AC/V AC A AC/V AC A DC/V DC 3/230 1/230 1/24 A 2x5 Switching cycles 2 x 105 Switching cycles/h 1800 4 A gL IEC 60947-5-1 Mechanical service life Switching cycles 30 x 106 C -20 ... +60 kV 4 General data Permissible ambient/storage temperature Clearance and creepage distances * Rated impulse withstand voltage * Pollution degree II IEC 60664-1 Degree of protection * Enclosure IP40 * Terminals IP20 Wire connections 0.2 ... 4 mm2 solid or 0.2 ... 1.5 mm2 stranded wire with sleeve * Fixed screw terminal (S) Dimensions WxHxD 70 x 90 x 71 mm Siemens * 10/2015 27 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT3 fuse monitors Overview Fuse monitors serve to monitor all types and versions of melting fuses that cannot be equipped with a fault signal contact. This enables integration in fault signaling circuits or a central alarm in order to improve plant availability. Technical specifications 5TT3170 IEC 60255; DIN VDE 0435-110 Standards Rated operational voltage Uc V 3 AC 380 ... 415 Primary operating range x Uc 0.8 ... 1.1 Rated frequency Hz 50 ... 400 Internal resistance of measuring paths /V > 1000 Max. permissible feedback % 90 Response/release time ms < 50 Rated impulse withstand voltage Uimp Input/output kV >4 V AC 250 Rated operational current Ie AC-1 A 4 Electrical service life AC-11 In switching cycles at 1 A 1.5 x 105 Terminals Screw (Pozidriv) Conductor cross-sections Rigid, max. Flexible, with end sleeve, min. Rated operational voltage Ue 1 Permissible ambient temperature mm2 mm2 2 x 2.5 1 x 0.5 C -20 ... +45 20/45/4 Acc. to EN 60068-1 Climatic withstand capability Dimensional drawings Circuit diagrams Graphical symbols L1 L2 L3 14 L1 L2 L3 14 15 L1 L2 L3 36 I201_11512 45 90 L1' L2' L3' 13 5 43 64 More information Typical circuit, function chart L1 L2 L3 3 AC 400 V L If the fuse fails, the motor is immediately disconnected (prevention of two-phase run). After changing the fuse, the motor can be restarted by pressing the "ON" button. Unlike conventional motor circuit breakers, it is not possible to switch the motor on if the fuse is faulty. N L1 L2 L3 13 L1/L2/L3 13-14 L1' L2' L3' 14 Off On M 3~ 28 I201_07251b Siemens * 10/2015 I2_07037 F1 F2 F3 Note: The internal resistance of the measuring paths of the fuse monitor is in the M range so that the VDE regulations with regard to touch voltage are met in the event of faulty fuses (> 1000 /V). To isolate the main switch, it must be switched off. The enclosed label should be affixed to the switchgear as a reminder. (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT3 phase and phase sequence monitors Overview Phase monitors monitor the voltages in three-phase system and signal the power failure of one or more phases over a floating contact. Phase sequence monitors monitor the phase sequence in three-phase systems and signal any changes in the phase sequence - change of rotating field - over a floating changeover contact. Technical specifications 5TT3421 5TT3423 IEC 60255; DIN VDE 0435 Standards Rated operational voltage Uc V AC 230/400 Primary operating range x Uc 0.8 ... 1.1 Hz 50/60 VA VA 9 0.2 Rated operational voltage Ue V AC 250 Rated operational current Ie A 4 Minimum contact load V; mA 10; 100 Rated frequency Electronics Contacts Rated power loss Pv Rated insulation voltage Ui Between coil/contact kV 4 Contacts contact (AC-11) A 3 Electrical isolation Creepage distances and clearances Actuator/contact mm 4 Rated impulse withstand voltage Uimp Actuator/contact kV > 2.5 Terminals Screw (Pozidriv) Conductor cross-sections Rigid, max. Flexible, with end sleeve, min. Degree of protection Acc. to EN 60529 Safety class Acc. to EN 61140/VDE 0140-1 1 mm2 mm2 Acc. to EN 60068-1 Climatic withstand capability 2 x 2.5 -IP20, with connected conductors II C Permissible ambient temperature 400 -20 ... +60 20/60/4 Dimensional drawings L1 L2 L3 12 12 14 11 14 11 18 18 I201_10780 45 90 L1 N L2 L3 5 43 64 5TT3421 5TT3423 Circuit diagrams Graphical symbols L1 L2 L3 14 12 N 11 5TT3421 L1 L2 L3 14 12 11 5TT3423 Siemens * 10/2015 29 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT3 phase and phase sequence monitors More information Typical circuit diagrams 5TT3421 phase monitors 5TT3423 phase sequence monitors The phase monitor can be operated either in 1, 2 or 3-phase operation. Phase sequence monitors must always be connected in three-phase. I201_10776a L1 N PE L1 L2 L3 N L1 L2 L3 14 12 I2_10779a 11 Single-phase operation L1 L2 N L1 L2 L3 11 I201_10777a K1 L1 L2 L3 N 14 12 11 Two-phase operation L1 L2 L3 N I201_10778 M L1 L2 L3 N 14 12 11 Three-phase operation 30 Siemens * 10/2015 14 12 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT3 insulation monitors for industrial applications Overview Insulation monitors are used for protection of persons and against fire in non-grounded systems (IT systems). The insulation resistance of the system being monitored is measured against ground. Such measurements are prescribed in accordance with DIN VDE 0100-410 - Power installations up to 1,000 V - Protection against electric shock. Technical specifications 5TT3470 5TT3471 V AC V DC 220 ... 240 -- --- x Uc V DC 0.8 ... 1.1 -- --- Frequency range for Uc Hz 45 ... 400 -- Rated power loss Pv For DC supply VA W Approx. 2 -- -Approx. 1 Terminals A1 to A2 Terminals L to PU Terminals A1, A2 to L, PU Terminals against contacts kV kV kV kV <4 <4 <4 <6 <4 <4 <3 <6 Supply voltage Uc With AC supply For DC supply Primary operating range Rated impulse withstand voltage Uimp For three-phase and AC systems For direct voltage systems Measuring circuit V AC V DC 0 ... 500 -- -12 ... 280 Primary operating range x Umeas 0 ... 1.1 0.9 ... 1.1 Frequency range for Umeas Hz 10 ... 10000 -- k 5 ... 100 5 ... 200 Infinitely variable Infinitely variable Measurement voltage range Umeas Alarm values Measuring shunt RAL Setting of alarm value On absolute scale Alternating current internal resistance Internal test resistance k > 250 -- Direct current internal resistance Internal test resistance L+ and L- to PU k k > 250 -- -75 each Measurement voltage Umeas Internal V DC Approx. 15 -- Max. measurement current Imeas Short circuit mA < 0.1 0.2 ... 4 depending on the voltage Direct interference voltage Max. permissible V DC 500 -- Response delay At RAL 50 k and 1 F and to 0.9 x Rmeas and Rmeas from to 0 s s < 1.3 < 0.7 0.8 0.4 Switching hysteresis At Rmeas 50 k % 15 10 ... 15 Contacts contact 2 CO 2 CO V 230 AC DC 12 ... 280 A A A A A A 4 ---5 2 4 2 0.2 3 --- 2 2 Rated operational voltage Ue Rated operational current Is Thermal current Ith DC-13 at 24 V DC DC-13 at 250 V DC AC-15 AC-15 NO contacts AC-15 NC contacts Terminals Screw (Pozidriv) Conductor cross-sections Rigid, max. Flexible, with end sleeve, min. Permissible ambient temperature mm2 mm2 2 x 2.5 1 x 0.50 C -20 ... +60 Degree of protection Terminals (acc. to EN 60529) Enclosure (acc. to EN 60529) IP20 IP40 Resistance to climate Acc. to EN 60068-1 20/060/04 Dimensional drawings PE PT LT1 LT2 A1 A2 PE PT X1 LT L+ L- 12 22 12 22 14 11 24 21 14 11 24 21 36 36 I201_11519 45 90 L 5 43 64 5TT3470 5TT3471 Siemens * 10/2015 31 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT3 insulation monitors for industrial applications More information Function charts l Uc R Insulation resistance Set value Without fault storage 11-14 11-12 On Off Red LED With fault storage Reset-button 11-14 11-12 Red LED On Off I201_11522 5TT3470, 5TT3471 Typical circuit diagrams 5TT3471 for direct voltage systems 5TT3470 for three-phase and AC systems L1 L2 L3 L+ PE L- L PE N PE L A1 A2 I201_11520b PT LT1 LT2 11 12 14 21 22 24 The power supply to terminals A1 - A2 can be taken from the system being monitored. However, in this case it is important to ensure compliance of the voltage range with the technical specifications. With a jumper LT1 - LT2: A fault signal is not stored; the device is automatically released again if the insulation resistance improves. Without a jumper LT1 - LT2: the fault signal is stored; pressing the RESET button or an external key at the terminals LT1 - LT2 clears the fault signal. Pressing the Test button or an external key at the terminals PT - PE simulates a fault. 32 Siemens * 10/2015 L+ PE I201_11521a L- LT X1 PT 11 12 14 21 22 24 The measurement voltage to the terminals L+ and L- serves at the same time as the power supply. With a jumper LT - X1: A fault signal is not stored; the device is automatically released again if the insulation resistance improves. Without a jumper LT - X1: The fault signal is stored; pressing the RESET button or an external key at the terminals LT - X1 clears the fault signal. Pressing the Test button or an external key at the terminals PT - X1 simulates a fault. (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 5TT3 insulation monitors for industrial applications Front views PE PT LT1 LT2 L PE PX X1 LT A1 A2 L+ L- LED green LED green T1 LED red T2 T1 LED 1 red T2 LED 2 red E1 14 11 24 21 LED green: LED red: E1: T1: T2: 12 Status display (ON) Insulation fault (AL) Alarm value adjuster (RAL) Test Reset 5TT3470 5TT3470 for three-phase and AC systems 22 14 11 24 21 LED green: LED 1 red: LED 2 red: E1: T1: T2: I201_11972 22 I201_11971 12 E1 Status display (ON) Insulation fault L- (RE-) Insulation fault L+ (RE+) Alarm value adjuster (RAL) Test Reset 5TT3471 5TT3471 for direct voltage systems Direct interference voltage Leakage capacitance While direct interference voltages do not damage the devices they often interfere with conditions in the measuring circuit. In a system being monitored, only one insulation monitor should be connected. This must be taken into account if gateways are used. The insulation monitor can be installed in systems with high leakage capacitance to PE. In the case of high-resistance alarm values, a transient alarm signal may occur when switching on the system being monitored due to an existing ground leakage capacitance. The values of the capacitance CE given the following set values of R are approximately: * R = 200 k: CE > 0.8 F * R = 50 k: CE > 2.0 F * R = 20 k: CE > 4.5 F In these applications, you should work without an alarm storage. Due to the measuring function with bridge circuit, the insulation monitor does not respond in the event of a simultaneous, exactly symmetrical ground fault of L+ and L-. However, exactly symmetrical ground faults are highly unlikely in practice. LEDs: * Green LED lights up if power supply Uc is applied * Red LED 1 lights up for insulation fault L+ to PE * Red LED 2 lights up for insulation fault L- to PE System capacitances to protective ground CE do not corrupt the insulation measurement because it is implemented with direct current. However, the response time may be extended in the event of an insulation fault, namely in the magnitude of the time constant RE times CE. The power supply to the insulation monitors can be taken from a separate system or from the one being monitored. However, the above mentioned power supply range must be taken into account. LEDs: * Green LED lights up if power supply Uc is applied * Red LED lights up in the event of an insulation fault Siemens * 10/2015 33 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 7LQ3 monitors for medical premises Overview In areas that conform to Group 2 of DIN VDE 0100-710, any interruption to the examination and/or treatment of patients would place those patients at risk. Limit monitoring This is prevented through the use of changeover and monitoring units. These monitor the insulation resistance of the nongrounded IT system, the load current and the temperature of the transformer. If the limit value is exceeded, the insulation monitor gives out a warning signal. Voltage monitoring In addition, a special voltage relay monitors the voltage of the power supply and switches to a second power supply if it falls below the specified limit values. Technical specifications Switchover devices 7LQ3361 7LQ3362 IEC 60364-7-710; DIN VDE 0100-710 Standards Supply voltage Uv V AC 230 Primary operating range x Uv 0.9 ... 1.1 Supply frequency fv Hz 50 ... 60 230/400 IEC 60664-1 Insulation coordination kV Rated impulse withstand voltage 4 3 Pollution degree W Max. power loss Pv 10.7 Power section Mechanically latched; mechanically and electrically locked Contactors Rated operational current acc. to DIN VDE 0100-710 A 51 32 Rated operational current AC-3 A 113 71 Short-circuit protection acc. to DIN VDE 0100-710 * Max. backup protection gG A 63 Switchover time s 0.1 ... 10 k 50 Measuring circuit insulation monitoring Response value Ran EN 61557-8 Response deviation RF from to 0.5 x Ran RF from to 0 k s s < 1.3 < 0.7 Hysteresis % 15 Measurement voltage Um V DC Approx. 15 Measurement current Im max (at RF = 0 ) A < 50 Internal resistance DC Ri k > 250 Impedance Zi at 50 Hz k > 250 Permissible direct interference voltage Ufg V DC < 300 Response time tan at Ran = 50 k, Ce = 1 F External/internal Test button Measuring circuit load current monitoring Response value, adjustable with external transformer 50/5 A, Class 1 A 5 ... 50 Hysteresis % 4 Temperature influence %/C 0.05 Delay tv adjustable s 0.1 ... 20 Response value k 3.2 ... 3.8 Release value k 1.5 ... 1.8 Measuring circuit, temperature monitoring PTC thermistor Acc. to DIN 44081/44082 Unit(s) 1 ... 6 in series ON-switching OFF-switching x Uc 2 % hysteresis 0.9 4 % hysteresis 0.9 At L1, L2 or L3 ms -- 100 -- Yes Measuring circuit, voltage monitoring Response values Phase failure detection N-conductor monitoring 34 Siemens * 10/2015 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 7LQ3 monitors for medical premises Switchover devices 7LQ3361 7LQ3362 Connection Terminals * Load circuit Feeder terminals Output terminals mm 4 ... 16 * Communication Status signals Fault indications mm 2.5 C -20 ... 45 Environmental conditions Permissible ambient temperature Vertical Mounting position Insulation monitors 7LQ3354 7LQ3355 EN 61557-8 Standards Supply voltage Uv V AC 230 Primary operating range x Uv 0.9 ... 1.1 Supply frequency fv Hz 50 ... 60 Max. power loss Pv VA Approx. 7 Rated line voltage Un (measuring circuit) V AC 0 ... 300 Rated frequency fn Hz 10 ... 1000 EMC immunity to interference IEC 61000-6-2 EMC emitted interference IEC 61000-6-3 IEC 60664-1 Insulation coordination kV Rated impulse withstand voltage 4 Pollution degree 3 Flammability class UL 94V-0 Measuring circuit insulation monitoring k Response value Ran 50 RF from to 0.5 x Ran RF from to 0 k s s < 1.3 < 0.7 Hysteresis % 15 Measurement voltage Um V DC Approx. 15 Measurement current Im max (at RF = 0 ) A < 50 Internal resistance DC Ri k > 250 Impedance Zi at 50 Hz k > 250 Permissible direct interference voltage Ufg V DC < 300 Response value, adjustable with external transformer 50/5 A, Class 1 A 5 ... 50 Hysteresis % 4 Temperature influence %/C 0.05 Delay tv adjustable s 0.1 ... 20 Response value k 3.2 ... 3.8 Release value k 1.5 ... 1.8 Response time tan at Ran = 50 k, Ce = 1 F 50 ... 500 EN 61557-8 Response deviation Measuring circuit load current monitoring Measuring circuit, temperature monitoring PTC thermistor Acc. to DIN 44081/44082 Unit(s) 1 ... 6 in series Display and control elements Operating error Acc. to IEC 61557-8 LED display * * * * Current and temperature monitoring Ready-to-run Insulation fault Line breakage monitoring of the isolation measuring circuit One red and one green LED Green Red Red * Display of current insulation resistance -- Pushbuttons TEST and RESET 11-step LED chain Siemens * 10/2015 35 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 7LQ3 monitors for medical premises Insulation monitors 7LQ3354 7LQ3355 Output relay Overtemperature Overload Insulation fault Contacts for 2 CO 2 CO 2 CO Working current Mode of operation Contacts AC-15 NO contacts AC-15 NC contacts A AC/V AC A AC/V AC 3/230 1/230 Electrical service life AC-15, 1 A, 230 V AC Switching cycles 30000 A AC 5 Thermal current Connection Terminals Screw (Pozidriv) * Conductor cross-sections * Insulation fault Rigid Flexible, with end sleeve 2 mm2 mm2 2 x 2.5 1 x 2.5 C -20 ... +60 Environmental conditions Permissible ambient temperature Climatic withstand capability Acc. to EN 60068-1 20/060/04 Degree of protection Acc. to EN 60529 IP20, with connected conductors Any Mounting position Vibration stress * Amplitude * Frequency Acc. to IEC 60068-2-6 mm Hz 0.35 10 ... 55 Test and signaling panels 7LQ3356 7LQ3357 DIN VDE 0100-710; IEC 60364-7-710 Standards V AC/DC 24 kV 4 Voltage range AC DC 0.8 ... 1.1 x Un 0.9 ... 1.2 x Un Rated current per input mA 0.25 Rated consumption VA 6 Rated voltage Un Rated impulse withstand voltage Acc. to IEC 60664-1 Continuous operation Rated operating mode Pollution degree Acc. to IEC 60664-1 2 Degree of protection * Enclosure * Terminals Acc. to IEC/EN 60529 Acc. to IEC/EN 60529 IP40 IP20 UL 94V-0 Flammability class Vibration stress * Amplitude * Frequency Acc. to IEC/EN 60068-2-6 Climatic withstand capability Acc. to IEC/EN 60068-1 mm Hz 0.35 10 ... 55 20/045/04 EN 50005 Terminal marking Wire connections * Solid mm2 mm2 1 x 1.5 2 x 0.5 * Strand mm2 2 mm 1x1 2 x 0.2 mm2 1 x 0.5 * Strand with sleeve Box terminals with wire protection Conductor mounting Device dimensions mm 80 x 160 x 57 Temperature range C -20 ... +45 36 Siemens * 10/2015 82 x 150 x 57 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 7LQ3 monitors for medical premises Current transformers Class 1 7LQ3358 IEC/EN 60044-1, VDE 0414-44-1 Standards Rated operational voltage Uc V AC 230 Rated frequency Hz 50/60 kV 3 Rated transformation ratio kn A 50/5 Primary rated current A 50 Secondary rated current A 5 Rated power V/A 1.5 Test voltage 50 Hz, 1 min 1 Class Rated frequency Hz 50 ... 60 Highest voltage at equipment/insulation level kV 0.72/3 Overcurrent factor * Thermal rated short-time current * Thermal rated continuous current x In x In FS5 60 1.2 Expanded current range % 120 Permissible ambient temperature C -20 ... +60 Test and signaling combination for insulation monitors 7LQ3360 DIN VDE 0100-710; IEC 60364-7-710 Standards Rated voltage Un V AC 24 Voltage range AC 0.8 ... 1.1 x Un Connected load W 0.5 Continuous operation Rated operating mode EMC * Static discharge * RF irradiation * Rapid transients * Surge voltage (surge) Acc. to IEC/EN 61000-4-2 Acc. to IEC/EN 61000-4-3 Acc. to IEC/EN 61000-4-4 Acc. to IEC/EN 61000-4-5 kV V/m kV kV 8 (air discharge) 10 2 1 IP30 Degree of protection Amplitude mm 0.35 Frequency Hz 10 ... 55 Temperature range C -5 ... +55 Climatic withstand capability Acc. to IEC/EN 60068-1 05/055/04 EN 50005 Terminal marking Wire connections * Solid * Strand with sleeve and plastic collar * Strand with sleeve and plastic collar * Strand with sleeve DIN 46228-1/-2/-3/-4 DIN 46228-1/-2/-3 mm2 mm2 mm2 mm2 Box terminals with wire protection Conductor mounting Device dimensions 1x4 1 x 2.5 2 x 1.5 2 x 2.5 mm 80 x 80 x 35 Siemens * 10/2015 37 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 7LQ3 monitors for medical premises Voltage relays 5TT3411 5TT3412 Rated operational voltage Uc V AC 230 230/400 Overload capability x Uc 1.15 1.1 Rated frequency Hz 50/60 ON-switching OFF-switching x Uc 2 % hysteresis 0.9 V/mA 10/100 At L1, L2 or L3 ms -- 100 -- Yes Response values Minimum contact load Phase failure detection N-conductor monitoring Rated insulation voltage Ui Between coil/contact Contacts AC-15 NO contacts AC-15 NC contacts Electrical service life in switching cycles AC-15, 1 A, 230 V AC Rated impulse withstand voltage Acc. to IEC 60664-1 kV 3 1 5 x 105 kV 4 2 Screw (Pozidriv) Conductor cross-sections * Rigid * Flexible, with end sleeve Permissible ambient temperature Climatic withstand capability 4 3 2 Pollution degree Terminals 4 % hysteresis 0.9 2 mm2 2 mm 2 x 2.5 2 x 1.5 C -20 ... +60 20/060/04 Acc. to EN 60068-1 IT line transformers 4AT3/4AT4 In the case of isolating transformers used to set up medical IT systems, overcurrent protective devices are only permissible as protection against short circuits. To protect the isolating transformers against overload they are fitted with monitoring devices that signal an excessive rise in temperature (e.g. 7LQ3354 insulation monitors). Standards EN 61558-2-15 Safety class I Static shield between primary and secondary winding With insulated connection Thermistor transformer protection Warning in the event of thermal overload1) With center tap Insulation monitoring Short-circuit voltage uz % 3 No-load current i0 * Starting current (rush), max. % x I1N 3 8 Rated ambient temperature ta/thermal class 1) Tripping units must be ordered separately. Accessories SIRIUS 4AT isolating transformers Further information about the SIRIUS 4AT isolating transformers can be found in Catalog IC 10 * 2016. 38 Siemens * 10/2015 55 C/H (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 7LQ3 monitors for medical premises Characteristic curves 7LQ3354 and 7LQ3355 insulation monitors The following diagrams show the function of the measuring circuits of the temperature monitors (top left), the load current monitors (bottom left) and the insulation monitors (right). UV UV t R 3,2 k 1,8 k P1/P2 OverPower temperature/ failure sensor break 11-14 21-24 RF Ground fault Ran t t Break Measuring circuit t 11-12 21-22 I201_13579 Without fault storage (jumper LT1-LT2) 51-54 61-64 51-52 61-62 On LED "MK" Off UV t On LED "AL" Off > Hysteresis N t 34/44 31/41 LED green LED red > 32/42 on off Reset push-button LT 51-54 61-64 51-52 61-62 With fault storage (without jumper LT1-LT2) tv On LED "MK" Off on off I201_13580a On LED "AL" Off I201_13581 Siemens * 10/2015 39 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 7LQ3 monitors for medical premises Test and signaling panels Test and signaling combination for insulation monitors X1-L1 Line 1 OK LED 1 U UH X1/X2 X2-L1 Line 1 failure LED 2 t RE Ground fault Ron X3-L2 Line 2 OK LED 3 X4-L2 Line 2 failure LED 4 t Acknowledgement pushbutton X5- Isolation LED 5 Horn LED 6 X6- Overtemperature > LED 7 ON X7- Overload > LED 8 7LQ3360 I201_13990 Yellow LED Green LED X11-SM Output I201_13989 Horn X8- Acknowledgement lamp test Test / Dark Bright 7LQ3356, 7LQ3357 Voltage relays L3 L2 L1 U U UN La UN Lb U on Hysteresis Response value U off t t 11 - 14 .3 - .4 .1 - .2 I201_13574 5TT3411 11 - 12 I201_13576a 5TT3412 The voltage relay switches at a phase asymmetry of approx. 6 % to 8 %, regardless of the response values for undervoltage. The above diagram also shows the timing interval. 40 Siemens * 10/2015 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 7LQ3 monitors for medical premises Dimensional drawings Switchover devices -X1 -X2 -X3 171 K2 K1 900 F2 T01 F3 K13 K6 K7 K8 376 470 K5 585 728 F1 K4 840 K3 K9 K10 225 S1 76 K20 I201_17066 250 132 212 7LQ3361 The 7LQ3361 and 7LQ3362 switchover devices are designed for mounting in series ALPHA 630 DIN floor-mounted distribution boards and ALPHA AS side-by-side switchgear cabinets with a cabinet depth of at least 320 mm. More information about the distribution boards can be found in Catalog LV 10. Contact your local Siemens representative for information about additional versions. Siemens * 10/2015 41 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 7LQ3 monitors for medical premises -X1 -X2 -X3 171 K2 K1 K4 F2 K5 K6 F3 K13 585 728 F1 900 T01 840 K3 376 470 K7 K8 K9 K10 225 S1 76 K20 I201_17067 250 132 212 7LQ3362 The 7LQ3361 and 7LQ3362 switchover devices are designed for mounting in series ALPHA 630 DIN floor-mounted distribution boards and ALPHA AS side-by-side switchgear cabinets with a cabinet depth of at least 320 mm. More information about the distribution boards can be found in Catalog LV 10. Contact your local Siemens representative for information about additional versions. Insulation monitors A1 P1 P2 k PE L` PE` L PT LT1 LT2 A1 P1 P2 i k PE` PE L` A2 PT LT1 LT2 L 45 90 A2 i 14 22 11 24 32 21 34 42 31 44 52 41 54 12 62 51 64 61 14 22 11 24 42 7LQ3355 Siemens * 10/2015 21 34 42 31 44 52 41 140 105 7LQ3354 32 54 62 51 64 X1 61 X2 X5 I201_13807 12 43 55 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 7LQ3 monitors for medical premises Test and signaling panels 80 10 47 57 I201_13986 I201_13985 150 160 82 7LQ3357 Current transformers Test and signaling combination for insulation monitors 27 I201_13810 55 80 10 78 I201_14002 7LQ3356 ON TEST 30 20 60 55 80 6 35 6,5 46 7LQ3360 40 7LQ3358 Voltage relays N La Y1 11 12 23 24 33 34 12 41 42 14 L1 L2 L3 N 23 31 45 90 Lb Y2 72 5TT3411 72 11 24 I201_13712 32 43 55 5TT3412 Siemens * 10/2015 43 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 7LQ3 monitors for medical premises Circuit diagrams Switchover devices X1:1 X1:2 X1:PE L1 N Line 1 X1:4 X1:5 X1:PE L1 N Line 2 X2:5 X2:3 L1 L2 IT system load To IT transformer L1 N X1:7 X1:8 From IT transformer L1 L2 N (MZ) X2:1 X2:2 X2:4 X2:S X2:10 X2:11 115 115 2N SCH P1 P2 I201_17068 230 0 7LQ3361 X1:1 X1:2 X1:3 X1:4 X1:PE L1 L2 L3 N Line 1 X1:5 X1:6 X1:7 X1:8 X1:PE L1 L2 L3 N Line 2 X2:2 X2:6 X2:8 L1 L2 L3 IT system load To IT transformer L1 L2 L3 N X1:9 X1:10 X1:11 X1:12 400 400 230 230 230 2N SCH P1 P2 I201_17069 400 From IT transformer L1 L2 L3 N(STP) X2:1 X2:4 X2:7 X2:10 X2:S X2:12 X2:13 7LQ3362 X3:1 X3:2 Line 1 Line 1 Line 2 Line 2 Operation Failure Operation Failure X3:4 X3:5 X3:6 X3:7 X3:8 X3:9 IT transformer Temperature Current monitoring monitoring X3:10 X3:11 X3:12 ISO monitoring X3:13 X3:14 X3:15 I201_17070 Test button ISO Circuit diagram of 7LQ3361 and 7LQ3362 switchover device to test signaling device (e.g. 7LQ3356 or 7LQ3357 test and signaling panels) 44 Siemens * 10/2015 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 7LQ3 monitors for medical premises X3:16 X3:17 X3:18 X3:19 X3:20 Line 2 Failure X3:21 Temperature monitoring X3:22 X3:23 IT system Current monitoring X3:24 X3:25 ISO bad X3:26 Contactor Line 1 not switched off ISO good X3:27 X3:28 X3:29 Contactor Line 2 not switched off X3:30 I201_17071 IT transformer MCB Line 1 Line 2 Line 1 tripped Operation Operation Failure Circuit diagram of 7LQ3361 and 7LQ3362 switchover device to the central building control system devices Insulation monitors P1 P2 i k A1 L' A2 PE' L Transformer protection PE PT Insulation monitors LT1 7LQ3354 11 14 12 21 24 22 31 34 32 41 44 42 51 54 52 I201_13713b LT2 61 64 62 7LQ3354 P1 P2 i k A1 L' A2 Transformer protection L PE' PE PT Insulation monitors LT1 7LQ3355 11 14 12 21 24 22 31 34 32 41 44 42 51 54 52 I201_13811b LT2 X1 X2 X5 61 64 62 7LQ3355 Test and signaling panels A2 SM PT2 PT1 X8 X7 X6 X5 X4 X3 X2 X1 X5 X2 + A1 Test and signaling combination for insulation monitors 3 4 5 PT1 Test Ground fault QH/LT 2 PT2 ON PT 1 X1 6 7 8 Ack. I201_13988 I201_13987 7LQ3360 7LQ3356, 7LQ3357 Voltage relays La Y1 Y2 31 I201_13714a Lb 11 23 33 41 12 24 34 42 23 11 32 24 14 12 L3 L2 L1 N N 5TT3411 5TT3412 Use La and Lb for monitoring 2 phases or 2-channel monitoring of 1 phase. Lb must be jumpered with La if only La is used. Siemens * 10/2015 45 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 7LQ3 monitors for medical premises More information Connection examples Switchover devices 7LQ3361 / 7LQ3362 Terminal block X3 LINE 1 Test button ISO X3:1 LINE 2 IT transformer Temperature monitoring Operation Failure Operation Failure X3:2 X3:4 X3:5 X3:6 X3:8 X3:7 X3:9 X3:10 Current monitoring X3:12 X3:11 ISO monitoring X3:13 X3:14 X3:15 L (L+) N (L-) X8 A1 A2 SM Acknowledgment key external Insulation OK Insulation Fault Transformer Temperature X7 Output Group message X6 X5 Transformer Overload X4 Line 2 Operation Line 1 Failure Line 1 Operation X3 Line 2 Failure X2 X1 PT2 Test button PT1 7LQ3356 / 7LQ3357 I202_01367a 7LQ3361, 7LQ3362 Insulation monitors 230 V AC L Isolating transformer 3.15 ... 8 kVA N 1) Current transformer L1 7LQ3358 L2 PE PE P1 P2 i k A1 A2 L' Transformer protection L PE ' PE PT Insulation monitor I201_17057a 7LQ3354 11 14 12 21 24 22 31 34 32 > Overtemperature 41 44 42 51 54 52 61 64 62 > Overcurrent X1 X2 X5 1) If there is no center tap, L/L' is connected to L1 or L2. 2) The 24 V AC power supply unit needs to be powered over the IT system. 7LQ3354 46 Siemens * 10/2015 24 V AC 2) PT1 7LQ3360 Test and signaling combination PT2 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 7LQ3 monitors for medical premises Insulation monitors L Isolating transformer N 3,15 ... 8 kVA L1 Current transfor. 1) 7LQ3358 230 V AC PE L2 PE External test P1 P2 i k Transformer protection L' A2 A1 PE PT Jumpers = non-latching LT1 Reset External LT2 Insulation monitor I201_13994a 7LQ3355 ' PE L PE PT 11 14 12 21 24 22 31 34 32 > Overtemperature 1) 41 44 42 > Overcurrent 51 54 52 61 64 62 RF < RAL / Measuring circuit break Insulation fault X1 X2 X5 X1 X2 X5 PT1 PT2 7LQ3360 Test and signaling combination If there is no center tap, L/L' is connected to L1 or L2. 7LQ3355 Up to four 7LQ3360, 7XV9306, 7XV9304 or 7XV9302 test and signaling combinations can be connected; cf. connection example and comparison of contact assignment between previous and current test and signaling combinations Test and signaling panels Voltage monitoring OK OK Failure Line 2 Failure Line 1 7LQ3354 / 7LQ3355 11 14 31 34 51 54 X1 ... X7 Fault signaling inputs X8 Acknowledgement horn/lamp test SM Central indication output PT1, PT2 Test button for insulation monitors PT PE L(L+) externo QH / LT X2 X1 1 2 X3 3 X4 4 X5 5 6 X6 7 X7 X8 SM A1 PT1 8 I201_13991a PT2 7LQ3356 /7LQ3357 A2 N(L-) 7LQ3356, 7LQ3357 Siemens * 10/2015 47 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 7LQ3 monitors for medical premises Connection example for 7LQ3355 insulation monitors with 7XV9306 test and signaling combination L 230 V AC 1) Isolating transformer 3.15 ... 8 kVA N L1 7LQ3358 Current transformer L2 PE PE External test P1 P2 i k A1 A2 L' Transformer protection PE ' L PE Jumper = non-latching PT Insulation monitor LT1 7LQ 11 14 12 21 24 22 > Overtemperature 31 34 32 Reset LT2 External 41 44 42 51 54 52 61 64 62 R F < R on / measuring circuit interruption Insulation fault PT > Overcurrent X1 X2 X5 52 51 PE 4 5 B1 18 2 3 A1 A2 5TT 7XV9306 6 15 4 5 24 V AC 2) 2 3 7XV9306 6 4 5 1) If there is no center tap, L/L' is connected to L1 or L2. 2) The 24 V AC power supply unit needs to be powered over the IT system. 2 3 7XV9306 6 4 5 2 3 7XV9306 6 I201_13812d 7LQ3355 Up to four test and signaling combinations (e.g. the 7LQ3360 test and signaling combination and the previous 7XV9306, 7XV9304 or 7XV9302 test and signaling combinations (now no longer available) can be connected. 48 Siemens * 10/2015 An external 24 V AC (e.g. 4AC3616) transformer is required to power the test and signaling combination. (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 7LQ3 monitors for medical premises Test 24 V AC Fault input 7XV9304 7XV9302 7LQ3360 2 1 31 X5 3 2 32 PT1 4 3 33 PT2 5 4 34 X2 6 5 35 X1 I201 13813c 7XV9306 Comparison between the contact assignment for the previous, no longer available test and signaling combinations 7XV9306, 7XV9304 and 7XV9302 and the contact assignment for the current 7LQ3360 test and signaling combination. Monitoring of medical premises IT system Medical premises are all rooms used for the examination or treatment of persons or animals. Besides doctors' surgeries and clinics, these also include hydro-therapeutic and physical therapeutic treatment and massage rooms. In the IT system name, the first letter describes the grounding relationships of the current source. I stands for insulation of all live parts from ground or connection of a point to ground via an impedance. The second letter identifies the grounding relationships of the body of the electrical system. TUV-certified switchover and monitoring devices are used for a reliable power supply. The insulation monitors and voltage relays in the switchover and monitoring devices need to comply with the requirements of standard DIN VDE 0100-710 and IEC 60364-7-710. T means that the body is directly grounded, independently of any existing grounding of a point of the power source. IT system L1 Medical premises were divided up into three groups in DIN VDE 0100-710, which was published in 2002. L2 L3 I201_12110 For premises in groups 0 and 1, the standard requires, among other things, implementation of the system type TN-S and residual current protective devices (RCDs) for protection against excessively high touch voltages. The premises of group 2 are defined as follows: * The system must not be disconnected in the event of a first short circuit to frame or to ground or if the general power supply fails * Repetition of treatment is unacceptable for patients or it is impossible to obtain results of examinations again * An irregularity (a fault) in the power supply can cause danger to life * A piece of equipment used for medical purposes, which is used occasionally for applications in accordance with DIN VDE 0100-710.2.7, should be assigned to group 2 Typical locations in group 2 are anesthetic rooms, operating rooms and recovery rooms in hospitals, clinics or doctors' surgeries, as well as equipment used in veterinary medicine. Standard DIN VDE 0100-710 makes the following stipulations: * Constant monitoring of the power supply on the preferred supply line and on the second supply line * Automatic changeover to the 2nd supply line within a defined time (< 0.5 s or < 15 s) * Reliable operation even if a fault occurs (one-fault security) The switchover device monitors the supply voltage on the preferred and second supply line for undervoltage and power failure. As soon as a voltage drop to a defined value is determined, the voltage relays respond and the switchover device automatically switches to the second supply line. As soon as the power is restored on the preferred supply line, the system switches back to it. Body PE Medical IT systems Standard DIN VDE 0100-710 makes the following stipulations for a medical IT system in group 2: * The medical IT system must be used for socket outlet circuits in the patient environment. This also applies for circuits supplying operating room lights * At least one IT system is required for each room group * Separate circuits must be provided for multiple socket outlets * First faults must not lead to disconnection of the system The IT system is powered by an isolating transformer or an independent power source (such as a battery). The special feature is that no active conductors in this network are linked directly to ground. This has the advantage that only a small residual current can flow in the event of an insulation fault. This is essentially dictated by the leakage capacitances and is harmless to patients and staff. The upstream fuse element does not respond so that the power supply, and therefore operation, is maintained, even in the event of a phase-to-ground fault. The high reliability of an IT system is ensured by continuous insulation monitoring. The insulation monitor detects insulation faults as they develop and signals in good time if a value falls below a limit value, before any further insulation faults can lead to an unexpected shutdown. The temperature of the transformer and the transformer load continue to be monitored constantly. Any exceeding of limit values is signaled immediately. Siemens * 10/2015 49 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 7LQ3 monitors for medical premises Insulation monitoring Voltage monitoring The 7LQ3354 and 7LQ3355 insulation monitors are used to monitor the insulation resistance of non-grounded IT systems in medical premises. They also simultaneously monitor the load current and the temperature of the IT isolating transformer. The devices can monitor both three-phase and AC systems. In the case of undervoltage, there is no guarantee that medical equipment will continue to function. Because of the risk this presents to patients, e.g. during operations, it is essential that a switchover unit switches to a second power supply in the event of an undervoltage in the preferred power supply. Temperature measurement: The temperature in the transformer winding is recorded using a PTC thermistor or NC contacts. The voltage relays switch when the voltage falls below 90 % of the rated voltage. The 5TT3411 relays serve to monitor a 1-phase infeed. 3-phase infeeds can be monitored using 5TT3412 relays. These relays also offer asymmetry, reverse voltage and phase failure detection. As well as an adjustable response value of 50 ... 500 k, the 7LQ3355 insulation monitor also has an 11-step LED chain for displaying the current insulation resistance of the system. A range of differently colored LEDs indicates the insulation resistance within the range of 20 k ... 1 M. This allows insulation deteriorations to be detected even before an alarm is triggered. The device is also equipped with an additional relay for connection of a test and signaling combination. This allows the 7LQ3360 test and signaling combination and the previous and no longer available test and signaling combinations 7XV9306, 7XV9304 and 7XV9302 to be connected to the 7LQ3355 insulation monitor (see also the graphic under "Connection example: 7LQ3355 insulation monitors with 7XV9306 test and signaling combination"). TUV-certified switchover device The 7LQ3361 and 7LQ3362 switchover devices have been tested and certified by TUV Rhineland. Switchover devices comply with DIN VDE 0100-710:2002-11 and IEC 60364-7-710:2002-11. Load current sensing: The 7LQ3358 current transformer detects the load current of a phase. Evaluation is carried out over the 7LQ3354 and 7LQ3355 insulation monitors. Evaluation: If one of the values is outside the limit values, an alarm is triggered. The LED for the relevant fault lights up and the alarm relay switches. The information is made available over the changeover contacts and can be displayed on the 7LQ3356 and 7LQ3357 test and signaling panels. Rhineland TUV certificate for 7LQ3361 and 7LQ3362 switchover devices 50 Siemens * 10/2015 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 7LQ3 monitors for medical premises Components and control elements in 7LQ3361 and 7LQ3362 switchover devices Meaning 2 1 3 4 1 Terminal block X1 2 Terminal block X2 3 Terminal block X3 4 Mechanical latching 5 Miniature circuit breakers 6 Voltage relay test pushbuttons 7 Insulation monitors 8 Temperature monitoring test pushbuttons 5 I201_17073 6 8 7 Control elements for insulation monitors 1 2 A1 P1 LED Meaning 1 Current monitoring (green) Lights up if the current is correct (Go state) 2 Current monitoring ">I" (red) Lights up in the case of overcurrent 3 Insulation monitoring "ON" Lights up when the power supply is (green) switched on (ready-to-run) 4 Insulation monitoring "MK" Lights up if a line of the measuring circuit (red) is interrupted (L, L', PE, PE') 5 Insulation monitoring "AL" Lights up in the case of an insulation fault, (red) RF<Ran (value has fallen below the response value) 5a Insulation monitoring "RF" 11-step LED chain to display the current (red, yellow, green) resistance 6 Temperature monitoring (green) Lights up when the power supply is switched on 7 Temperature monitoring (red) Lights up in the event of overtemperature or an interruption in the sensor circuit Pushbutton/rotary controller Meaning 8 Rotary controller response value ">I" Setting of the response value for current monitoring 9 Rotary controller delay time Setting of delay time after which the CO contacts return to their normal position if the current value exceeds the set response value. 9a Rotary controller response Setting of the response value for value "Ran k" insulation monitoring 10 "TEST" pushbutton Pressing the "Test" test button simulates an insulation deterioration in the measuring circuit (RF approx. 40 k), thus checking that the insulation monitor is fully functional 11 "RESET" button Deletion of fault if fault storage is activated 3 4 5 P2 A2 i k PE L` PE` L PT LT1 LT2 6 7 8 9 10 11 14 22 11 24 32 21 34 42 31 52 44 41 62 54 51 64 I201_13716 12 61 7LQ3354 1 2 A1 P1 P2 3 4 5 5a i k A2 PE` PE L` PT LT1 LT2 L 6 7 8 9 10 11 9a 14 7LQ3355 22 11 24 32 21 34 42 31 44 52 41 54 62 51 64 X1 61 X2 X5 I201_13814 12 Siemens * 10/2015 51 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Electrical Values 7LQ3 monitors for medical premises Control elements of the test and signaling panels 7LQ3 356 LED window displays Meaning Line 1 On Power supply is implemented over the preferred infeed line 1 on line 2 on Line 2 On + Line 1 Failure Power supply is implemented over the second line as the preferred infeed has failed line 1 failure line 2 failure Line 1 On + Line 2 Failure Power supply is implemented over the preferred infeed. However the second line is no longer available Line 2 On + Line 1 Failure + Line 2 Failure Power supply is implemented over the second line as the preferred infeed is faulty. There is undervoltage on the second line Overload Excessive power consumption of the IT system Overtemperature The transformer of the IT system is overloaded Insulation is good The transformer of the IT system is overloaded Insulation is defective The insulation resistance of the IT system is too low TEST Pushbutton for testing the insulation monitoring devices Acknowledgement pushbutton/lamp test Pushbutton for acknowledging the acoustic alarm signal/function test of the display elements > insulation ok I201_13995 test 7LQ3356, 7LQ3357 Note: Customized reporting and signaling panels can be produced, for instance with an integrated intercom, for the switchover and monitoring devices. For more information on this contact your local Siemens representative. Control elements of the test and signaling combination LED/pushbutton Meaning ON Green LED The LED lights up if the power supply is applied Ground fault Yellow LED Insulation fault: The insulation resistance of the IT system is too low TEST Pushbutton for testing the insulation monitoring devices Acknowledgement pushbutton Button for acknowledging the acoustic alarm signal LED/pushbutton Meaning ON I201_13996 TEST 7LQ3360 Control elements of voltage relay N La Lb Y1 Y2 11 23 L1 12 L2 L3 N 23 24 31 2 1 2 1 2 2 34 12 41 42 14 5TT3411 52 5TT3412 Siemens * 10/2015 32 11 24 I201_13720 33 1 5TT3411: Yellow LED The LED lights up if the system is 5TT3412: Green LED fault-free 2 TEST button Pressing the test button simulates an undervoltage. The 3-phase 5TT3412 voltage relay has a test button for each phase. (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Plants and Equipment 5TT3 fault signaling units Overview Fault signaling units are used in small plants where the installation of complex fault signaling systems would be too labor-intensive and too expensive. In the event of a fault, they enable fast fault localization of all monitoring devices and limit monitors installed in a plant from a central location. This increases plant availability. With the correct sensor configuration, they also provide the option of preventative maintenance. * 4 fault signaling inputs with LED * 1 LED as centralized fault indicator * One unit each for centralized fault indication and acoustic signaling * With acknowledgment for acoustic indicators * Open/closed-circuit principle so the 4 inputs can be adjusted via jumpers X1 - X2 * A maximum of 39 5TT3461 expansion fault signaling units can be connected to the 5TT3460 centralized fault signaling unit * The maximum possible cable length between 5TT3460 centralized fault signaling units and 5TT3461 expansion fault signaling units is approx. 100 m with a conductor crosssection of 1.5 mm2 Technical specifications 5TT3460 5TT3461 IEC 60255; DIN VDE 0435-110, -303 Standards Rated operational voltage Uc V AC 230 Primary operating range x Uc 0.8 ... 1.1 Rated frequency fn Hz 50/60 Fault signaling inputs S1 ... S4 V AC 230 Signal voltage V 7 ... 10 Noise pulse duration ms 100 Acknowledgment pulse duration ms 200 * Rated operational voltage Ue V AC 230 -- * Rated operational current Ie A 5 -- * Minimum contact load V; mA 10; 100 -- To terminals S and H Contacts Connections Screw (Pozidriv) * Terminals * Conductor cross-sections - Rigid, max. - Flexible, with end sleeve, min. Permissible ambient temperature Acc. to IEC 60068-2-30 Humidity class PZ 1 mm2 2 mm 2 x 2.5 1 x 0.5 C -20 ... +60 F Dimensional drawings A1 S H A1 S H S1 S2 S3 S4 13 23 X1 X2 X1 X2 14 24 QH A2 I201_11511a 45 90 S1 S2 S3 S4 A2 36 36 5TT3460 5TT3461 5 43 64 Circuit diagrams Graphical symbols A2 S1 S2 S3 A1 S4 14 24 13 23 A2 S1 S2 S3 X1 X2 S H X1 5TT3460 X2 S H QH S4 I201_00155 I201_00154 A1 5TT3461 Siemens * 10/2015 53 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Plants and Equipment 5TT3 fault signaling units Typical circuit, function chart L1 230 V AC N Acknowledgement key A1 A2 13 23 S1 S2 S3 S4 QH 14 24 X1 X2 S H A1 A2 S1 S2 S3 S4 X1 X2 S H SM 5TT3461 (Working current) I201_07282d 5TT3460 (Closed-circuit current) Fault alarm FA If there is a fault, the SM fault indication contact closes and a centralized fault is indicated over an LED. The assigned LED remains lit until the fault is eliminated. Until the acknowledgment, momentary faults can be identified by the remaining centralized fault. The terminals A1, S1 to S4 and QH must be operated in-phase. If no external acknowledgment key is connected, terminal QH must be applied to L1. If jumper X1 - X2 is inserted, open-circuit protection (otherwise closed-circuit protection). Contacts 13/14 and 23/24 close in the event of an incoming fault. The assigned LED and the SM centralized fault indication LED light up. The alarm sensor (contact 13/14) is switched off using the acknowledgment key. The assigned LED and the centralized fault indication LED continue to light up and contact 23/24 remains closed until the fault is eliminated. Cables S and H carry an extra-low voltage. In the case of long connections between different distribution boards a shielded cable must be laid parallel to the installed load lines. As a light signal sensor for the group messages we recommend devices 5TE57 or 5TE58; as an alarm sensor the devices 5TT3450 to 5TT3453. Fault 1 LED 1 Fault 2 LED 2 LED SM Central indication relay Central indication horn Acknowledge. horn I201_07283c dark 54 Siemens * 10/2015 bright (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Plants and Equipment 5TT5 EMERGENCY STOP modules Overview EMERGENCY STOP circuits are common safety measures in all laboratory equipment and industrial plants. The EMERGENCY STOP modules used here must meet the most rigorous demands with regard to functional reliability. Benchmark is the degree of self-monitoring. Technical specifications 5TT5200 IEC 60204-1; EN 60204-1 (VDE 0113-1) Standards Supply * Rated operational voltage Uc - Primary operating range V AC x Uc 230 0.8 ... 1.1 Hz 50 * Rated power loss Pv Coil/drive Contact per pole VA 3.5 0.8 Control voltage Terminal Y1 V AC/DC 24 Control current Terminal Y1 mA DC 45 ms 500 * Electrical isolation, creepage distances and clearances, actuator/contact mm 3 * Rated impulse withstand voltage Uimp actuator/contact kV >4 A A A 3 2 5 * Rated frequency fn Recovery time Safety Contacts * Contacts NO contacts NC contacts NO contact/NC contact AC-15 AC-15 AC-1 * Contact gap * Electrical service life AC-15, 2 A, 230 V AC * Permissible switching frequency Vibration resistance Amplitude Acc. to EN 60068-2-610 Up to 55 Hz mm >1 Switching cycles 105 Switching cycles/h 600 mm 0.35 Connections * Terminals Screw (Pozidriv) PZ 1 * Conductor cross-sections of main current paths - Rigid Max. - Flexible, with end sleeve Min. mm2 mm2 2 x 2.5 1 x 0.5 Permissible ambient temperature C 0 ... +50 Acc. to EN 60068-1 Climatic withstand capability 0/55/04 Dimensional drawings 5TT5200 EMERGENCY STOP module K1/2 A1 Y1 A2 Y2 13 23 33 41 14 24 34 42 71 I201_08437a 45 90 Supply 16 5 43 55 Siemens * 10/2015 55 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Plants and Equipment 5TT5 EMERGENCY STOP modules Circuit diagrams Typical circuit diagrams L1 L1 EMERGENCYSTOP On EMERGENCYSTOP On K3 K4 A1 Y1 Y2 13 23 33 A1 41 Y1 Y2 K1 13 23 33 41 K1 Monitoring logic Monitoring logic K2 K2 L1 L2 L3 A2 14 24 34 A2 42 K3 14 24 34 42 K4 N N I201_08435b N I201_08436b Direct connection 230 V/400 V to 5 A Connection of external contactors The monitoring logic checks internal relay contacts (not shown) to see whether both relays have been released prior to switching on. This ensures that no contacts are welded. The voltage level at terminal A1 is also monitored. The parallel NC contacts K1 and K2 (terminals 41 and 42) can be connected as required. External contactors may be used when they are equipped with positively driven contacts according to safety regulations ZH1/457 of the German Trade Association. Contactors with 3 NO contacts and 1 NC contact must be used, in which case the NC contacts must be integrated in the monitoring loop - terminals Y1/Y2. The parallel NC contacts K1 and K2 (terminals 41 and 42) can be connected as required. 56 Siemens * 10/2015 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Plants and Equipment 5TT3 level relays Overview Level relays are used for the monitoring and control of conductive, non-combustible liquids and powders. They ensure overflow and dry run protection. Due to their sensor performance, the devices can also be used for general resistance monitoring. LED displays: - Green LED: lights up when operational voltage is applied - Yellow LED: lights up if MIN output relay is activated - Red LED: lights up if MAX output relay is activated Technical specifications 5TT3435 IEC 60255; DIN VDE 0435-110 Standards Supply * Rated operational voltage Uc - Primary operating range V AC x Uc 230 0.8 ... 1.1 * Rated frequency fn Hz 50/60 Setting range of the liquid level k 2 ... 450 % % 3 6 Switching point hysteresis of set value * At 450 k * At 2 k Voltage temperature influence From set value % <2 Max. cable length to the electrodes at 100 F/km Setting k 450 100 35 10 5 m m m m m 50 200 500 1500 3000 Electrode voltage Max. V AC Approx. 10 Electrode current Max. mA AC Approx. 1.5 Response delay Adjustable s 0.2 ... 20 OFF-delay Adjustable s 0.2 ... 20 Rated operational voltage Ue V 250 Rated operational current Ie A 5 kV kV kV 4 4 4 Test voltage Input/auxiliary circuit Input/output circuit Auxiliary/output circuit Connections * Terminals Screw (Pozidriv) * Conductor cross-sections - Rigid - Flexible, with end sleeve Max. Min. Permissible ambient temperature PZ 2 mm2 mm2 2 x 2.5 1 x 0.5 C -20 ... +60 20/60/4 Acc. to EN 60068-1 Climatic withstand capability Dimensional drawings 5TT3435 level relays 5TG8223 immersion electrodes 21 X1 COM X2 36 140 5 5 79 22 14 11 24 21 43 64 I201_12435 12 I201_13760 13 45 90 MINMAXA1A2 5 5TT3435 O16 5TG8223 Siemens * 10/2015 57 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Plants and Equipment 5TT3 level relays Circuit diagrams Graphical symbols X1 X2 A1 A2 MIN MAX COM 14 12 24 22 11 21 Typical circuit for 5TT3435 One-step level control L1 N 230 V AC A1 A2 The one-step level control is particularly suitable for dry run or overrun protection with free inflow/outflow. Supply 0 Level 14 11 12 24 21 22 MIN MAX COM MIN The COM reference electrode and MAX electrode are needed. MAX MAX X1 Without the jumper X1-COM only relay 21-22-24 switches. With the jumper X1-COM both relays switch together. 21-24 X1 COM X2 21-22 21-24 X1 COM X2 21-22 X2 I201_07520d 11-14/21-24 X1 COM X2 11-12/21-22 11-14/21-24 X1 COM X2 11-12/21-22 t I201_07518b Level COM X2 t t Static current Load current COM X2 t = tv max adjustable from 0.2 s to 20 s Two-step level control UH N 230 V AC L1 The 2-step level control keeps the liquid level between a minimum and a maximum level. Three electrodes are required: MIN, MAX and COM. 0 Level A1 A2 MAX MIN MAX MIN MAX X1 Without the jumper X1-COM, switching is as follows: 2 14 11 21-24 12 21-22 24 21 X1 COM X2 11-14 22 11-12 MIN COM 1 * If the MAX level is fallen below/exceeded, only relay 21-22-24 switches. * If the MIN level is fallen below/exceeded, only relay 11-12-14 switches. With the jumper X1-COM, both relays switch together if the value exceeds the MAX level or falls below the MIN level. X2 21-24 21-22 X1 COM X2 Level 11-14, 21-24 X1 COM X2 11-12, 21-22 I201_07521d I201_07519b 11-14 11-12 11-14, 21-24 X1 COM X2 11-12, 21-22 tv max t v min COM X2 Static current Load current COM X2 tv max and tv min adjustable from 0.2 s to 20 s 58 Siemens * 10/2015 t v min tv max (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Plants and Equipment 5TT3 line circuit relays Overview Line circuit relays are used to interrupt circuits and prevent electromagnetic fields in circuits where there are currently no active loads. If the loads are disconnected, and the line circuit relay measures a usage of only 2 to 20 VA - adjustable - it disconnects the cable to the supply voltage and switches over to extra-low voltage. As soon as loads are reconnected, the line circuit relay detects the increase in usage and switches back to the supply voltage. While the line circuit relay switches off any unnecessary system components, it is not a device for ensuring isolation in the sense of safe disconnection. The line circuit relay is unable to detect consumers with electronic power supply units, e.g. electronically controlled vacuum cleaners. It is expedient to connect such devices to a base load resistor (PTC resistor) so that the line circuit relay is reset to supply voltage. Technical specifications 5TT3171 IEC 60255; DIN VDE 0435-110 Standards Rated operational voltage Uc V AC 230 Primary operating range x Uc 0.85 ... 1.15 Rated frequency Hz 50/60 Electronics Contacts VA VA 5 2.6 V 3 Response value Adjustable VA 2 ... 20 Release value % of the response value Rated impulse withstand voltage Uimp Input/output Rated power loss Pv Monitoring voltage 70 kV >4 V AC 250 AC-1 AC-11 A A 16 3 Electrical service life In switching cycles at 3 A AC-11 Terminals Screw (Pozidriv) Rated operational voltage Ue Rated operational current Ie contact Contacts 5 x 105 PZ 1 Conductor cross-sections * Rigid * Flexible, with end sleeve Max. Min. Permissible ambient temperature mm2 mm2 2 x 2.5 1 x 0.5 C -20 ... +45 Degree of protection Acc. to IEC/EN 60529 IP20, with connected conductors Safety class Acc. to EN 61140/VDE 0140-1 II Humidity class Acc. to IEC 60068-2-30 F Dimensional drawings I201_10775a 45 90 L N 18 5 43 64 5TT3171 Circuit diagrams If the line circuit relay does not respond to a load, it must be connected with a 5TG8222 base load resistor. Devices in active standby operation may impair the function of the line circuit relay. Typical circuit diagram 230 V AC L i N Electronic PTC I201_07036b L1 N Siemens * 10/2015 59 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Plants and Equipment 5TT3 p.f. monitors Overview The p.f. monitor monitors the phase displacement between current and voltage. Because the phase displacement angle changes with the load of the motor, this measurement method is ideal for the monitoring of asynchronous motors for underload and no-load operation, independent of size. However, in some cases, the p.f. barely changes if the load of the motor changes, e.g. in the case of relatively minor load changes on large-scale motors or single-phase split-pole motors or collector motors. The p.f. monitor monitors single and three-phase asynchronous motors up to approx. 5 A (without current transformer) for underload and no-load operation, thus increasing plant availability. Typical applications are fan monitoring in the case of V-belt breakage, pump monitoring in the event of valve closure or dry runs. A current transformer is used for higher rated currents. If the lower p.f. value set at the p.f. monitor is violated for the duration of the set response delay, the output relay switches to the alarm state and the red LED lights up. If the higher p.f. value is violated, the output relay switches back without any significant delay. * Adjustable p.f. response value, from 0 to 0.97 * Current range up to 8 A * LED display for operation and alarm * Automatic resetting of alarm Technical specifications 5TT3472 IEC/EN 60255, VDE 0435 Standards 3 V AC 400 x Uc 0.8 ... 1.1 Frequency range fn Hz 45 ... 65 Rated power loss Pv VA Approx. 11 kV <4 Rated operational voltage Uc With AC supply Primary operating range Rated impulse withstand voltage Uimp Against contacts For AC systems Current measuring circuits Current measuring range Imeas A AC 0.4 ... 8 Short-time load carrying capacity For 2 s For 0.5 s A A 20 40 Current transformer, class 3 or better Secondary current A 1 or 5 Setting range Adjustable p.f. 0 ... 0.97 Response delay Adjustable s 1 ... 100 Short-circuit strength Fuse 4 A gL A 4 Contacts contact * Rated operational voltage Ue Thermal current AC-15 NO contacts AC-15 NC contacts AC-13 at 24 V DC * Rated operational current Ie * Minimum contact load 1 CO V AC 250 A A A A 4 3 1 1 V; mA 10; 100 Connections Screw (Pozidriv) * Terminals * Conductor cross-sections - Rigid - Flexible, with end sleeve Max. Min. Permissible ambient temperature PZ 2 mm2 2 mm 2 x 2.5 1 x 0.5 C -20 ... +60 Resistance to climate Acc. to EN 60068-1 20/60/4 Degree of protection Acc. to EN 60529 IP20, with connected conductors Dimensional drawings L3 L2 I201_11528b 45 90 L1 L1' 12 11 14 18 5 43 64 5TT3472 60 Siemens * 10/2015 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Plants and Equipment 5TT3 p.f. monitors Circuit diagrams L1 L L2 L3 L1 Load N M 3 L2 L3 L1 L1' L2 L3 L1 L1' L2 L3 I201_11525b I201_11524b 11 12 11 L L2 k l 14 K k K l L l L 1V1 1W1 M 3 Connection of single-phase load M 3 L3 2W1 11 12 High Speed k L1 L1' L2 L3 I201_11527b K 12 14 Connection of three-phase load L1 Low Speed 1U1 2U1 2V1 14 Connection of motors with separate windings I201_11526b L1 L1' L2 L3 11 12 14 Connection of three-phase load with external current transformer, whereby the winding direction of the current transformer must be taken into account. More information Function charts Front view L3 L2 U(L1/L2/L3) L1 L1' I(L1/L2) LED green E1 LED red E2 11-14 11-12 ty If the lower p.f. value set at the p.f. monitor is violated for the duration of the set response delay, the output relay switches to the alarm state and the red LED lights up. Contact 11-14 closes and the red LED lights up. 12 11 14 I201_11973a I201_11523b p.f. Trip LED green: Status display (U) LED red: Underloading indicator (p.f. alarm) E1: Response value E2: Response delay ty Siemens * 10/2015 61 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Plants and Equipment 5TT3 motor protection relays Overview Thermistor motor protection relays monitor the thermistors wound in motors. This helps to prevent thermal motor overloads, e.g. due to high switching frequency, single-phasing, disabled cooling or excessive ambient temperatures. Up to 6 thermistors in series can be monitored. A conductor break in the sensor conductor will immediately trip the device. The device can also be used for monitoring wound quick-break switches - e.g. bimetal thermostats. This offers all-round motor protection. * For the detection of - Violation of upper temperature limits - Wire breaks in sensor circuits * 1 input for 1 to 6 thermistors * With 2 LEDs green/red for ready-to-run and fault * Response value: 3.2 to 3.8 k * Release value: 1.5 to 1.8 k * The max. cable length of the sensor supply cable NYM 2 x 1.5 is 100 m * Remote Reset: over A1/A2 (NC contact) or over X1/X2 (NO contact) LED displays: * Green LED: Lights up when operational voltage is applied * Red LED: Lights up in the event of overtemperatures or an interruption in the sensor circuit Technical specifications 5TT3431 5TT3432 IEC 60255; DIN VDE 0435-110 Standards Rated operational voltage Uc V AC 230 Primary operating range x Uc 0.9 ... 1.1 Rated frequency Hz 50/60 Response value k 3.2 ... 3.8 Release value k 1.5 ... 1.8 Minimum contact load V; mA 10; 100 Rated insulation voltage Ui Between coil/contact kV 4 Rated impulse withstand voltage Uimp Actuator/contact kV > 2.5 Contacts contact (AC-11) A 3 * Rated operational voltage Ue V AC 230 * Rated operational current Ie A mm 5 4 Actuator/contact Connections * Terminals Screw (Pozidriv) * Conductor cross-sections - Rigid - Flexible, with end sleeve Max. Min. Permissible ambient temperature Acc. to EN 60068-1 Climatic withstand capability Dimensional drawings 5TT343 motor protection relays A1 P1 P2 A1 P1 P2 A1 X1 X2 12 22 12 22 14 11 24 21 14 11 24 21 36 36 I201_11530a 45 90 A2 5 43 64 5TT3431 62 5TT3432 Siemens * 10/2015 PZ 1 mm2 mm2 2 x 2.5 1 x 0.5 C -20 ... +60 20/60/4 (c) Siemens AG 2016 Monitoring Devices Monitoring Devices for Plants and Equipment 5TT3 motor protection relays Circuit diagrams Graphical symbols A1 A2 A1 A2 14 12 24 22 P1 P2 11 21 14 12 24 22 P1 P2 X1 X2 5TT3431 11 21 5TT3432 Typical circuit for 5TT3431, 5TT3432 Reset pushbutton X1 L1 A1 X2 230 V AC N UH I201_07280e A2 14 11 12 24 21 22 I201_07041c t R 3,2 k 1,8 k P1/P2 TEST/RESET pushbutton (X1/X2) TEST/ Overtemperature/ Voltage RESET sensor breakage failure RESET 1...6 v + t TEST/ RESET M 11-14 5TT3431: 11-12 11-14 5TT3432: 11-12 If one of the thermistors (possible for up to 6) reaches the response temperature, the device switches. 5TT3431 (without terminals X1/X2 and without RESET button) switches back on after cooling and after the value falls below that permanently set for the hysteresis. To switch on before this time, briefly disconnect the power supply. 5TT3432 stores the fault and remains switched off until the RESET button is pressed. Siemens * 10/2015 63 (c) Siemens AG 2016 Monitoring Devices Notes 64 Siemens * 10/2015 (c) Siemens AG 2016 (c) Siemens AG 2016 Siemens AG Energy Management Low Voltage & Products Postfach 10 09 53 93009 REGENSBURG GERMANY www.siemens.com/lowvoltage Subject to change without prior notice PDF (3ZW1012-5SV80-0AC1) PH 0216 64 En Produced in Germany (c) Siemens AG 2016 The information provided in this brochure contains merely general descriptions or characteristics of performance which in case of actual use do not always apply as described or which may change as a result of further development of the products. An obligation to provide the respective characteristics shall only exist if expressly agreed in the terms of contract. Availability and technical specifications are subject to change without notice. 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