Busbar trunking system
SIVACON 8PS - Planning with SIVACON 8PS
Planning Manual 09/2011
Low-Voltage Power Distribution and
Electrical Installation Technology
Answers for infrastructure.
SIVACON 8PS - Planning with
SIVACON 8PS
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Low-voltage power distribution and
electrical installation technology
Busbar trunking system
SIVACON 8PS - Planning with
SIVACON 8PS
Planning Manual
Busbar trunking systems up to 6300 A
09/2011
A5E01541101-02
System overview
1
Planning principles
2
Planning with BD2
3
Planning with LD
4
Planning with LX
5
Planning with LR
6
Further information about
planning
7
Glossary
A
Legal information
Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
with a safety alert symbol, indicates that minor personal injury can result if proper precautions are not taken.
CAUTION
without a safety alert symbol, indicates that property damage can result if proper precautions are not taken.
NOTICE
indicates that an unintended result or situation can occur if the relevant information is not taken into account.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by personnel qualified for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Qualified personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication
may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.
Siemens AG
Industry Sector
Postfach 48 48
90026 NÜRNBERG
GERMANY
A5E01541101-02
Ⓟ 11/2011
Copyright © Siemens AG 2007.
Technical data subject to change
SIVACON 8PS - Planning with SIVACON 8PS
Planning Manual, 09/2011, A5E01541101-02 3
Table of contents
1 System overview........................................................................................................................................ 9
1.1 Overview of Siemens busbar trunking systems.............................................................................9
1.2 CD-K system................................................................................................................................13
1.3 BD01 system................................................................................................................................17
1.4 Networked busbar trunking systems for industrial and building applications ..............................20
2 Planning principles................................................................................................................................... 23
2.1 Structure of the planning manual.................................................................................................23
2.2 Busbar trunking system planning.................................................................................................24
2.2.1 Principles of busbar trunking system planning ............................................................................24
2.2.2 Different types of busbar trunking systems and their functional scope .......................................26
2.2.3 A comparison of busbar trunking systems and cable trunking ....................................................28
2.2.4 Planning guidelines......................................................................................................................30
2.3 Rated currents and short-circuit currents of standard transformers ............................................32
2.4 System selection criteria ..............................................................................................................33
2.4.1 Technical data of the systems .....................................................................................................33
2.4.2 Areas of application for high-current systems..............................................................................36
2.4.3 Selection on the basis of rated transformer data.........................................................................37
3 Planning with BD2 ................................................................................................................................... 39
3.1 System description.......................................................................................................................39
3.2 System components ....................................................................................................................40
3.2.1 Preliminary remark for specifications...........................................................................................40
3.2.2 Type code ....................................................................................................................................42
3.2.3 Straight trunking units ..................................................................................................................45
3.2.4 Junction units ...............................................................................................................................46
3.2.5 Feeder units .................................................................................................................................49
3.2.5.1 End feeder units...........................................................................................................................49
3.2.5.2 Centre feeder units ......................................................................................................................51
3.2.6 Distribution board feeder..............................................................................................................52
3.2.7 Coupling units ..............................................................................................................................53
3.2.8 Tap-off units .................................................................................................................................54
3.2.8.1 Tap-off units up to 25 A................................................................................................................54
3.2.8.2 Tap-off units up to 63 A................................................................................................................55
3.2.8.3 Tap-off units up to 125 A..............................................................................................................57
3.2.8.4 Tap-off units up to 250 A..............................................................................................................59
3.2.8.5 Tap-off units up to 400 A..............................................................................................................60
3.2.8.6 Tap-off units up to 530 A..............................................................................................................61
3.2.9 Ancillary equipment units.............................................................................................................62
3.2.10 Additional equipment ...................................................................................................................63
3.2.10.1 Additional equipment for increased degree of protection IP54 and IP55 ....................................63
3.2.10.2 Fixing accessories .......................................................................................................................63
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3.3 Technical data............................................................................................................................. 65
3.3.1 BD2 general data ........................................................................................................................ 65
3.3.2 Tap-off units ................................................................................................................................ 66
3.3.3 Trunking units BD2A (aluminium) ............................................................................................... 66
3.3.4 Trunking units BD2A (copper)..................................................................................................... 69
3.4 Conductor cross sections............................................................................................................ 73
3.4.1 Feeder units ................................................................................................................................ 73
3.4.2 Tap-off units ................................................................................................................................ 75
3.5 Dimension drawings.................................................................................................................... 77
3.5.1 Straight trunking units ................................................................................................................. 77
3.5.2 Junction units .............................................................................................................................. 78
3.5.3 Distribution board feeder............................................................................................................. 83
3.5.4 End feeder units .......................................................................................................................... 84
3.5.5 Cable compartments ................................................................................................................... 88
3.5.6 Centre feed ................................................................................................................................. 89
3.5.7 Tap-off units ................................................................................................................................ 90
3.5.7.1 Tap-off units up to 25 A............................................................................................................... 90
3.5.7.2 Tap-off units up to 63 A............................................................................................................... 92
3.5.7.3 Tap-off units up to 125 A............................................................................................................. 95
3.5.7.4 Tap-off units up to 250 A............................................................................................................. 98
3.5.7.5 Tap-off units up to 530 A............................................................................................................. 99
3.5.8 Ancillary equipment units .......................................................................................................... 100
3.5.9 Additional equipment................................................................................................................. 101
4 Planning with LD.................................................................................................................................... 107
4.1 System description.................................................................................................................... 107
4.2 System components.................................................................................................................. 108
4.2.1 Preliminary technical descriptions for specifications................................................................. 108
4.2.2 Type code.................................................................................................................................. 110
4.2.3 Sizes, conductor configurations and structure of the busbar package ..................................... 111
4.2.4 Straight trunking units ............................................................................................................... 114
4.2.5 Junction units ............................................................................................................................ 117
4.2.6 Distribution link for Siemens power distribution boards............................................................ 119
4.2.7 Connection unit for non-Siemens distribution boards ............................................................... 120
4.2.8 Connection unit for transformers and distribution boards ......................................................... 121
4.2.9 Incoming cable connection unit................................................................................................. 122
4.2.10 Coupling units ........................................................................................................................... 123
4.2.11 Tap-off units .............................................................................................................................. 124
4.2.11.1 Tap-off units with fuse switch disconnector .............................................................................. 125
4.2.11.2 Tap-off units resistant to accidental arcs and with fuse switch disconnector ........................... 126
4.2.11.3 Tap-off units with circuit-breakers ............................................................................................. 127
4.2.12 Additional equipment................................................................................................................. 129
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4.3 Technical data............................................................................................................................130
4.3.1 LD general data .........................................................................................................................130
4.3.2 LDA.4.. trunking units (4-pole, aluminium).................................................................................131
4.3.3 LDA.6.. trunking units (5-pole, aluminium).................................................................................132
4.3.4 LDC.4.. trunking units (4-pole, copper)......................................................................................135
4.3.5 LDC.6.. trunking units (5-pole, copper)......................................................................................136
4.3.6 Feeder units ...............................................................................................................................138
4.3.7 Tap-off units with fuse switch disconnector ...............................................................................140
4.3.8 Tap-off units resistant to accidental arcs and with fuse switch disconnector ............................141
4.3.9 Tap-off units with circuit-breaker................................................................................................142
4.4 Weights ......................................................................................................................................144
4.5 Dimension drawings...................................................................................................................145
4.5.1 Trunking units.............................................................................................................................145
4.5.2 Tap-off units with fuse switch disconnector ...............................................................................146
4.5.3 Arc fault resistant tap-off units with fuse switch disconnector ...................................................147
4.5.4 Tap-off units with circuit-breaker................................................................................................148
4.5.5 Additional equipment .................................................................................................................150
5 Planning with LX.................................................................................................................................... 151
5.1 System description.....................................................................................................................151
5.2 System components ..................................................................................................................152
5.2.1 Preliminary remark for specifications.........................................................................................152
5.2.2 Type code ..................................................................................................................................155
5.2.3 System sizes and structure........................................................................................................156
5.2.4 Conductor configuration.............................................................................................................158
5.2.5 Straight trunking units ................................................................................................................159
5.2.6 Junction units .............................................................................................................................160
5.2.7 Distribution link for Siemens power distribution boards.............................................................162
5.2.8 Connection unit for non-Siemens distribution boards................................................................163
5.2.9 Connection unit for transformers and distribution boards..........................................................164
5.2.10 Incoming cable connection unit..................................................................................................165
5.2.11 Tap-off units and junction boxes................................................................................................166
5.2.11.1 General information ...................................................................................................................166
5.2.11.2 Tap-off units ...............................................................................................................................167
5.2.11.3 Tap-off units ...............................................................................................................................168
5.2.11.4 Tap-off units with fuse switch disconnector up to 630 A............................................................169
5.2.11.5 Tap-off units with circuit breaker up to 630 A and junction boxes with circuit breakers up
to 1250 A....................................................................................................................................170
5.2.12 Additional equipment .................................................................................................................171
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6 Planning Manual, 09/2011, A5E01541101-02
5.3 Technical data........................................................................................................................... 173
5.3.1 LX general data......................................................................................................................... 173
5.3.2 Trunking units LXA..30 (aluminium).......................................................................................... 174
5.3.3 Trunking units LXA..41 (aluminium).......................................................................................... 176
5.3.4 Trunking units LXA..51 (aluminium).......................................................................................... 178
5.3.5 Trunking units LXA..52 (aluminium).......................................................................................... 180
5.3.6 Trunking units LXA..61 (aluminium).......................................................................................... 182
5.3.7 Trunking units LXA..62 (aluminium).......................................................................................... 184
5.3.8 Trunking units LXC..30 (copper) ............................................................................................... 186
5.3.9 Trunking units LXC..41 (copper) ............................................................................................... 188
5.3.10 Trunking units LXC..51 (copper) ............................................................................................... 189
5.3.11 Trunking units LXC..52 (copper) ............................................................................................... 191
5.3.12 Trunking units LXC..53 (copper) ............................................................................................... 193
5.3.13 Trunking units LXC..54 (copper) ............................................................................................... 195
5.3.14 Trunking units LXC..61 (copper) ............................................................................................... 197
5.3.15 Trunking units LXC..62 (copper) ............................................................................................... 200
5.3.16 Fire load for trunking units without tap-off points ...................................................................... 201
5.3.17 Fixing distances ........................................................................................................................ 202
5.3.18 Connection units for non-Siemens distribution boards ............................................................. 203
5.3.19 Tap-off units .............................................................................................................................. 204
5.4 Dimension drawings.................................................................................................................. 206
5.4.1 Trunking units............................................................................................................................ 206
5.4.2 Tap-off units .............................................................................................................................. 207
5.4.2.1 Tap-off units with circuit-breaker............................................................................................... 207
5.4.2.2 Tap-off units with fuse switch disconnector .............................................................................. 209
5.4.3 Additional equipment................................................................................................................. 210
6 Planning with LR.................................................................................................................................... 213
6.1 System description.................................................................................................................... 213
6.2 System components.................................................................................................................. 215
6.2.1 Preliminary remark for specifications ........................................................................................ 215
6.2.2 Type code.................................................................................................................................. 218
6.2.3 System sizes and structure....................................................................................................... 219
6.2.4 Conductor configuration and sizes............................................................................................ 221
6.2.5 Straight trunking units ............................................................................................................... 222
6.2.6 Junction units ............................................................................................................................ 223
6.2.7 Distribution board connection for Siemens power distribution boards...................................... 225
6.2.8 Connection unit for non-Siemens distribution boards ............................................................... 225
6.2.9 Connection unit for transformers and distribution boards ......................................................... 226
6.2.10 Incoming cable connection unit................................................................................................. 228
6.2.11 Tap-offs for power distribution................................................................................................... 229
6.2.12 Additional equipment................................................................................................................. 230
6.3 Technical data........................................................................................................................... 232
6.3.1 LR general data......................................................................................................................... 232
6.3.2 Trunking units LRA..41 (4-pole, aluminium).............................................................................. 233
6.3.3 Trunking units LRA..51 (5-pole, aluminium).............................................................................. 236
6.3.4 Trunking units LRC..41 (4-pole, copper)................................................................................... 239
6.3.5 Trunking units LRC..51 (5-pole, copper)................................................................................... 242
6.4 Dimension drawings.................................................................................................................. 245
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7 Further information about planning ........................................................................................................ 247
7.1 Dimensioning and selection.......................................................................................................247
7.1.1 Determining the voltage drop.....................................................................................................247
7.1.2 Overload protection and short-circuit protection........................................................................251
7.1.3 Loop impedance ........................................................................................................................252
7.1.4 Degrees of protection for busbar trunking systems ...................................................................252
7.1.5 Degrees of protection for electrical equipment in accordance with IEC / EN 60529.................253
7.1.6 Distribution systems...................................................................................................................254
7.2 Planning example ......................................................................................................................256
7.3 Functional endurance ................................................................................................................258
7.3.1 Applicable regulations................................................................................................................258
7.3.2 Versions .....................................................................................................................................259
7.4 Fireproof barrier .........................................................................................................................261
7.4.1 Versions .....................................................................................................................................262
7.4.2 Cut-outs......................................................................................................................................264
7.5 Planning runs .............................................................................................................................265
7.5.1 Space requirements for horizontal installation...........................................................................265
7.5.2 Space requirements for vertical installation ...............................................................................267
7.5.3 Fixing brackets for vertical mounting .........................................................................................268
7.5.4 Fixing brackets for horizontal installation...................................................................................271
7.5.5 Carrier constructions..................................................................................................................273
7.6 Magnetic fields ...........................................................................................................................275
7.7 Sprinkler test ..............................................................................................................................280
7.8 Tools and services .....................................................................................................................282
A Glossary ................................................................................................................................................ 287
Index...................................................................................................................................................... 291
Table of contents
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8 Planning Manual, 09/2011, A5E01541101-02
SIVACON 8PS - Planning with SIVACON 8PS
Planning Manual, 09/2011, A5E01541101-02 9
System overview 1
1.1 Overview of Siemens busbar trunking systems
Figure 1-1 Overview of busbar trunking systems
CD-K system LX system
BD01 system LR system
BD2 system Communication-enabled busbar trunking systems
LD system
System overview
1.1 Overview of Siemens busbar trunking systems
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10 Planning Manual, 09/2011, A5E01541101-02
Siemens supplies the following busbar trunking systems:
Up to 40 A
CD-K system
Lower planning costs thanks to simple configuration
Time-saving installation thanks to plug-in quick connector
Optimum utilisation of the busbar line by fitting tap-off points on both sides
Uniform current load of the CD-K system conductors by distributing the downstream tap-
off plugs between the individual phases
IP54 protection as standard (IP55 with additional equipment) ensures versatility of use
Tap-off plugs make for speed and flexibility when changing load locations
For further information: see also CD-K system (Page 13) , catalogue LV 70
Up to 160 A
BD01 system
Flexible power supply
Variable junction units
Quick and easy to plan
Time-saving installation
Reliable mechanical and electrical connection technology
High stability and low weight
Positive opening and closing of the tap-off point
Versatile tap-off units
Small number of basic modules
Storage-friendly system
High degree of protection (IP54) for side-mounted and downwards tap-off points under
extreme ambient conditions, IP55 with additional equipment.
For further information: see also BD01 system (Page 17) , catalogue LV 70
System overview
1.1 Overview of Siemens busbar trunking systems
SIVACON 8PS - Planning with SIVACON 8PS
Planning Manual, 09/2011, A5E01541101-02 11
Networked busbar trunking systems
Networked functional expansions for combination with established tap-off units
Applications:
Wide-area lighting control
Remote control and signalling in industrial environments
Consumption data acquisition for central power tap-offs
KNX, AS-i, PROFIBUS bus systems
Quick and easy to plan
Flexibility in terms of expansion and changes
Modular system
Can be retrofitted to existing installations
Simple contacting of the bus line using insulation displacement method
Can be used with BD01, BD2, LD, LX systems
For further information: see also Networked busbar trunking systems for industrial and
building applications (Page 20) , catalogue LV 70
Up to 1250 A
BD2 system
Quick and easy to plan
Time-saving and efficient installation
Reliable and safe operation
Flexible modular system with simple solutions for every application
Power distribution system can be planned at an early stage without an exact knowledge
of load locations
Early readiness for operation thanks to quick and easy installation
High degree of protection IP54 or IP55 for use in harsh industrial environments
Innovative design: Omission of compensation elements to compensate for expansion
For further information: see also Planning with BD2 (Page 39) , catalogue LV 70
System overview
1.1 Overview of Siemens busbar trunking systems
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Up to 5000 A
LD system
The busbar trunking system for optimum power distribution in industry:
Reliable and safe operation
Quick and easy installation
Space-saving compact design up to 5000 A in one enclosure
Load feeders up to 1250 A
IP34 degree of protection with air cooling (IP54 with sealed enclosure)
Type-tested connection to distribution boards and transformers
For further information: Planning with LD (Page 107)
Up to 6300 A
LX system
The busbar trunking system for power transmission and distribution in buildings
Reliable and safe operation
Quick and easy installation
Sandwich construction up to 5000 A (6300 A on request)
Load feeders up to 1250 A
High degree of protection IP54 or IP55 for use in harsh industrial environments
Type-tested connection to distribution boards and transformers
For further information: Planning with LX (Page 151)
LR system
The busbar trunking system for power transmission under extreme ambient conditions (IP68)
Reliable and safe operation
Quick and easy installation
Cast resin system up to 6150 A
Safe connection to distribution boards and transformers
High degree of protection IP68 for outdoor applications
For further information: Planning with LR (Page 213)
SIMARIS design dimensioning software
SIMARIS design makes dimensioning electrical power distribution systems easy, fast and
safe.
To download a free demo version of SIMARIS design and to find out more, please visit:
www.siemens.com/simarisdesign
System overview
1.2 CD-K system
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1.2 CD-K system
System overview
The system has been designed for applications from 25 A to 40 A. It provides an efficient
and flexible means of supplying power to lighting installations and small consumers. Typical
areas of application include warehouses, department stores, storage facilities or clean room
technology.
Rated current 2 x 25 A, 30 A, 40 A, 2 x 40 A
Rated operating voltage 400 VAC
Degree of protection IP54, IP55
Spacing of tap-off points every 1 m on one side
every 0.5 m on both sides
Rated load feeder current Up to 16 A
System overview
1.2 CD-K system
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4
4
5
5
1
3
3
5
2
5
2
1
5
2
4
3
NSV0_00035a
Trunking unit
Feeder unit
Tap-off plug
End cap
Additional equipment
Figure 1-2 System overview CD-K system
System overview
1.2 CD-K system
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Connection method
The assembly of the trunking units as well as the feeder units is implemented by a
straightforward and unmistakable plug-in connection. The PE path is established
automatically when the housings are connected. An interlock mechanism engages when
connecting the trunking units as well as the feeder units with the end caps. Two fixings
prevent a loosening of the connections. No expansion compensation is required.
Figure 1-3 Connection method CD-K system
Tap-off plugs
Insulated enclosed tap-off plugs enable access to the current supply via tap-off points on the
trunking units. They can be connected and disconnected by hand.
Figure 1-4 Tap-off plugs CD-K system
The tap-off plugs are available in 3 and 5-pole versions, with and without fuse as well as with
connecting cables or plastic cable sleeves.
System overview
1.2 CD-K system
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Fixing and mounting
The trunking unit profile allows attachment of fixing brackets which are also used for
installing lighting fittings. They can be attached to any position of the trunking unit. The
clearance between the suspension points is dependent on the load and may not exceed
max. 3 m.
Figure 1-5 Fixing bracket on trunking unit
System overview
1.3 BD01 system
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1.3 BD01 system
System overview
The BD01 busbar trunking system is designed for applications from 40 A to 160 A.
In the BD01 system, a single size supports 5 rated currents. In other words, all other
components can be used across the power range for all 5 rated currents.
Rated current 40 A, 63 A, 100 A, 125 A, 160 A
Rated operating voltage 400 VAC
Degree of protection IP54, IP55
Spacing of tap-off points every 0.5 m on one side
every 1 m on one side
Rated load feeder current Up to 63 A
Figure 1-6 System overview BD01 system
Trunking unit Ancillary equipment unit
Feeder unit Junction unit
Fixing bracket End cap
Tap-off unit
System overview
1.3 BD01 system
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Connection method
The assembly of the trunking units – even with the end caps and feeder units – is fast and
inherently safe. The trunking units or end caps are simply inserted into the lower housing of
the joint block. Once the upper part of the joint block or end cap is fitted, a secure connection
is established by simply tightening the four screws.
Figure 1-7 Establishing a safe connection
Tap-off units
Tap-off units are available in four different sizes to connect the loads and also with various
components fitted, e.g. such as plugs, fuses, miniature circuit breakers or combinations of
the aforementioned.
Figure 1-8 Tap-off unit BD01 system
Ancillary equipment units offer additional space for decentral function expansions. Thus,
automation and control components can be installed directly on the busbar.
System overview
1.3 BD01 system
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Fixing and mounting
The BD01 busbar is installed edgewise, with the tap-off points on the side using fixing
brackets on the wall, ceiling or non-fixed installation. The mounting is implemented on the
connection points using a universal fixing bracket. The system can also be fitted flat with the
tap-off points pointing downwards. This reduces the required fixing interval by half.
Figure 1-9 Mounting the BD01 system
Fire protection
If the busbar trunking system is routed through a fire wall or ceiling, it must have fire
protection. Compliant with site requirements, Siemens offers fire protection class S90.
Ex-works equipment:
External fire protection in the form of a kit for on-site mounting
Mineral mortar or fire protection mastic to seal the joints between busbar trunking system
and component must be provided by the customer.
Figure 1-10 Fire protection BD01-S90
The approval documentation for Germany can be ordered separately:
Approval kit BD01-S90-ZUL-D
(approval certificate, wall signage and declaration of compliance)
System overview
1.4 Networked busbar trunking systems for industrial and building applications
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1.4 Networked busbar trunking systems for industrial and building
applications
The advantages of busbar trunking systems
The busbar trunking system has its advantages in the transport, distribution as well as
switching and protection with electrical energy.
Integration of automation and building systems engineering into the Siemens busbar trunking
systems results in further advantages and also increases the flexibility of the busbar trunking
system.
The combination of standard tap-off units with standard ancillary equipment units guarantees
enhancement in efficiency with the design, installation and operation.
The advantages of the system solution for planning
Modular system
Tested standard components
Freedom in the selection of the bus system
Use of most popular bus systems
The advantages of the system solution during commissioning
Quick and simple installation
Step-by-step commissioning possible
Flexibility in terms of changes and expansions
The advantages of the system solution in operation
Transparency of circuit states
Energy costs recorded centrally
Increase in system availability thanks to immediate detection of error location and type
Preventive maintenance as operating hours and switching cycles are recorded
System overview
1.4 Networked busbar trunking systems for industrial and building applications
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System concept networked busbar trunking systems
The tap-off units available as standard for busbar trunking systems can be combined with
standard ancillary equipment units to create a system solution for networked busbar
trunking. For reasons associated with design, an ancillary equipment unit based on a BD01
ancillary equipment unit is used for the BD01 busbar trunking system. A universal ancillary
equipment unit suitable for the application in question is used for BD2, LD and LX systems.
Standard applications are factory-assembled prior to delivery by combining tap-off unit and
ancillary equipment unit as appropriate. The bus line for the transmission of data signals is
laid in a cable channel mounted on the trunking unit.
Figure 1-11 Switching and signalling with the BD2 system
System overview
1.4 Networked busbar trunking systems for industrial and building applications
SIVACON 8PS - Planning with SIVACON 8PS
22 Planning Manual, 09/2011, A5E01541101-02
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Planning principles 2
2.1 Structure of the planning manual
It is not by any means easy to plan a power distribution concept involving the dimensioning
of systems and devices. End user requirements have to be matched with the technical
capabilities of the manufacturer. This planning manual will provide assistance as you plan
and design the following busbar trunking systems from 160 A to 6150 A:
BD2
LD
LX
LR
Description of the individual systems
Each system has a dedicated chapter describing its technical characteristics and areas of
application. Illustrations of the individual busbar trunking system elements also appear. All
significant information relevant to the planning process is given particular emphasis and
explained in detail.
Further information
You will find advice to help you to develop a ready-to-use planning solution under "Further
information". These include specific dimensioning principles and detailed information about
topics such as fireproof barriers and functional endurance.
Siemens can offer a range of services and engineering tools to assist you in drafting your
specification. For an overview and explanation of functions and features, please see Tools
and services (Page 282).
Planning principles
2.2 Busbar trunking system planning
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2.2 Busbar trunking system planning
2.2.1 Principles of busbar trunking system planning
Decision-making criteria affecting the creation of the power supply concept
When drafting a planning concept for a power supply, in addition to the applicable standards
and regulations, you also need to clarify and address issues of cost and technology.
Accordingly, when dimensioning and selecting electrical equipment such as distribution
boards and transformers, rather than focussing on them individually, you need to aim to
optimise their performance as part of a combined system.
All components have to be dimensioned sufficiently for loads both in rated operation and in
the event of a malfunction. Furthermore, you must take the following important issues into
consideration when drafting a power supply concept:
Building type, use and design (e.g. high rise, low rise or number of storeys)
Determination of load centres, identification of possible supply routes and locations for
transformers and main distribution boards
Calculation of the building's effective installed loads according to specific area loads as
appropriate for the building's use
Planning authority regulations and requirements
Requirements set out by the utility company
Requirements to be met by power supply concepts
Planning will never produce just a single option for a solution. Rather, you will need to
assess a number of possible options on the basis of issues relating to technology and cost.
The following requirements are major factors:
Simple and transparent planning
Long service life
High availability
Low fire load
Flexible adaptation to changes in the building
Planning principles
2.2 Busbar trunking system planning
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The solution: Siemens busbar trunking systems
In most applications, these requirements can easily be solved by using suitable busbar
trunking systems.
It is for this reason that busbar trunking systems are increasingly being preferred to cable
trunking by engineering consultants charged with designing systems for power transmission
and distribution. Siemens offers busbar trunking systems from 25 to 6300 A:
The CD-K busbar trunking system from 25 to 40 A for supplying power to lights and small
loads
The BD01 busbar trunking system from 40 to 160 A for supplying power to shopfloors
with tap-offs up to 63 A
The BD2 system from 160 to 1250 A for supplying power to medium-sized consumers in
building and industrial applications
The ventilated LD system for supplying power to consumers with medium power
requirements in industrial applications
The LX sandwich system for power distribution to consumers with high power
requirements in building applications
The LR cast resin system for power transmission under extreme ambient conditions
(IP68)
Figure 2-1 Siemens busbar trunking systems
Planning principles
2.2 Busbar trunking system planning
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2.2.2 Different types of busbar trunking systems and their functional scope
Requirements of the power supply
Specific requirements of power supplies and their individual components are typical of
modern production facilities and in building technology today. This is particularly true of
automated facilities.
The ability to retrofit new equipment or modify existing resources without interrupting active
production is not only important for the continuous provision of the electrical power supply. It
is also a vital requirement for production facilities operating on a multiple shift basis.
Increased safety and complex systems require a power distribution system which is able to
respond to all requirements associated with costs and technology.
The CD-K, BD01, BD2, LD, LX and LR busbar trunking systems are type-tested low-voltage
switchgear assemblies (TTA) compliant with DIN EN 60439-1 and -2. The CD-K, BD01, BD2
und LD systems consist of busbars, internal bar fixings, an external enclosure, fixing and
connection accessories. The LX sandwich system and the LR cast resin system consist of
busbars, fixing and connection accessories and an insulating foil, along with an aluminium
enclosure (LX) or an enclosure made from epoxy resin (LR).
Figure 2-2 BD2 trunking unit with tap-off unit
Power transmission
Components of the busbar trunking system transmit power between transformers and low
voltage power distribution systems and from the main distribution board to the service
distribution board. Trunking units without tap-off points are used for the power transmission.
In addition to the standard lengths, customers can select any lengths to meet their particular
building requirements.
Planning principles
2.2 Busbar trunking system planning
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Power distribution
The main application of busbar trunking systems is power distribution. Current can't be taken
from just a single point which is permanently installed such as a cable installation. Current
tap-off units can be moved to any position within the entire system. To tap power at any
given point simply requires positioning a tap-off unit at that location on the busbar.
The result is a flexible distribution system for decentralised power supply to a particular line
or area. Tap-off points can be mounted on one or both sides of straight trunking units.
Depending on the requirements of the particular application, busbar trunking units with tap-
off units for a rated current of 1250 A from a single tap-off point are available for tapping off
power and connecting loads. The tap-off units can be equipped with fuses, fuse-switches,
miniature circuit breakers or circuit breakers as desired.
To be able to change the tap-off units without disconnecting the busbar trunking run, the
following requirements apply:
Requirements
The PE contact on the tap-off unit leads during installation and lags during removal.
The parts which are live during installation, removal or connection have complete
protection against direct contact (degree of protection IP2x).
Installation requires phasing to be correct.
The tap-off unit must be isolated during installation and removal.
Figure 2-3 Tap-off units for flexible current consumption
Planning principles
2.2 Busbar trunking system planning
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2.2.3 A comparison of busbar trunking systems and cable trunking
Comparison of features
Feature Busbar trunking unit Cable trunking
TTA x
Mechanical safety High Low
Fire load Low High
Thermal characteristics Ambient temperature compliant with
DIN EN 60439-1 and -2
max. +40°C and +35°C average over 24
hours
Cable loads assume +30 °C in accordance
with
DIN 57298-4, Chap. 5.3.3.1/
DIN VDE 0298-4/2.88
.
Network topology Transparent (line topology with load
feeders connected in series via tap-off
units)
Significant cable cluster at feeding point due
to point-to-point power supply to loads from
central power distribution system
Protective devices for loads In the tap-off unit: facilitating direct and
immediately traceable assignment to load
locally.
Centrally in the distribution board: this means
that assignment to the load cannot be
verified directly. You have to rely on the
cable and load being labelled correctly.
Space requirements Low High, since correspondingly large distribution
boards are needed. Laying criteria
(clustering, laying method, current carrying
capacity, etc.) have to be taken into account.
Retrofitting in the event of
changes to load feeders
Highly flexible thanks to tap-off points in
the trunking units and large number of
different tap-off units
Time-consuming and expensive. Additional
cables need to be laid from the distribution
board to the load.
Planning and configuration Quick and easy using computer-assisted
planning tools
Configuration is time-consuming and
complex (distribution board and cable
dimensioning, cable diagrams, etc.)
Dimensioning (current, voltage
drop, neutralisation conditions)
Complex Very complex
Troubleshooting expenditure Low High
Fireproof barrier Type-tested, factory-built Dependent upon installation quality on site
Functional endurance Functional endurance tested to
DIN 4102-12
Dependent upon installation quality on site
Electromagnetic interference Low Relatively high for standard cables
Installation Few installation accessories and tools,
short installation times
Extensive installation accessories and
numerous tools, long installation times
Weight Weighs up to 1/3 of comparable cable
weight
Up to 3 times the weight of the busbar
trunking system
Halogen-free,
PVC-free 1)
All tap-off units are halogen-free and
PVC-free.
Standard cables are not halogen-free and
PVC-free.
1) Details to be obtained from manufacturer
Planning principles
2.2 Busbar trunking system planning
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Planning made easier
Easy to plan, quick to install and flexible to use: Siemens busbar trunking systems are an
efficient means of supplying power to any building. Power distribution can be planned
precisely on the basis of total connected load and the type and number of loads. Planning
tools such as SIMARIS design provide assistance. The line topology with load feeders
arranged at regular intervals ensures transparency. All applications can be implemented
quickly and compactly with standardised sizes.
In a cable trunking system, new loads have to
be connected via an additional sub-distribution
board; this costs
both time and money.
On busbar trunking systems, tap-off units in
the vicinity of loads ensure local transparency.
Increased safety due to high short-circuit rating and minimum fire load.
Advanced safety – both in respect of short-circuit rating and where fire load is concerned.
BD2A 250 busbar trunking systems, for example, have a fire load of just 1.32 kWh/m,
whereas comparable cable trunking systems (NYY 4 x 95/50 mm2) are rated at 5.19 kWh/m.
Furthermore, the busbars are halogen-free. Siemens busbar trunking systems feature high
short-circuit rating. Furthermore, troubleshooting is made easier thanks to local load short-
circuit protection.
High fire load with cables Low fire load with busbars
Planning principles
2.2 Busbar trunking system planning
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2.2.4 Planning guidelines
Documentation aids
The planning manual "Planning with SIVACON 8PS" contains general principles and
product-specific details for planning and dimensioning power distribution using SIVACON
8PS busbars.
For the complete planning of all main components from medium voltage, through
transformers, to the power outlet for utility and industrial buildings, use of the application
manual of TIP is recommended.
Advance planning
Infeed powers Rated currents and short-circuit currents of
standard transformers (Page 32)
Connected loads Technical data of the systems (Page 33)
Demand factor Planning example (Page 256)
Permissible voltage drop Determining the voltage drop (Page 247)
Required protective measures Degrees of protection for busbar trunking
systems (Page 252)
Distribution systems (network structures) Distribution systems (Page 254)
Selection of the power supply concept:
Centralised with cable and subdistribution boards A comparison of busbar trunking systems and
cable trunking (Page 28)
Decentralised with busbar trunking systems A comparison of busbar trunking systems and
cable trunking (Page 28)
Draft planning
System sizing
Short-circuit rating Technical data of the systems (Page 33)
Rated operating currents Technical data of the systems (Page 33)
Calculation of voltage drop Determining the voltage drop (Page 247)
Overload protection and short-circuit protection Overload protection and short-circuit protection
(Page 251)
Degree of protection depending on room type to
DIN VDE 0100
Degrees of protection for busbar trunking
systems (Page 252)
Planning principles
2.2 Busbar trunking system planning
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Consideration of busbar layout
BD2 LD LX LR
Trunking units Straight trunking units
(Page 45)
Straight trunking units
(Page 114)
Straight trunking units
(Page 159)
Straight trunking units
(Page 222)
Junction units Junction units (Page 46) Junction units
(Page 117)
Junction units
(Page 160)
Junction units
(Page 223)
Tap-off units Tap-off units (Page 54) Tap-off units
(Page 124)
Tap-off units and
junction boxes
(Page 166)
Fireproof
barriers
Fireproof barrier (Page 261)
Additional
equipment
Additional equipment
(Page 63)
Additional equipment
(Page 129)
Additional equipment
(Page 171)
Additional equipment
(Page 230)
Installation
General installation instructions Installation instructions for trunking units, incoming
supplies, tap-off units and accessories
Additionally for
BD2: installation manual for the BD2 system
(order no. A5E02126899)
LD: installation manual for the LD system
(order no. A5E02321029)
LX: installation manual for the LX system
(order no. A5E01120816)
LR: installation manual for the LR system
(order no. A5E00949793)
Creation of a specification
Specification texts BD2 Preliminary remark for specifications (Page 40)
Specification texts LD Preliminary technical descriptions for specifications
(Page 108)
Specification texts LX Preliminary remark for specifications (Page 152)
Specification texts LR Preliminary remark for specifications (Page 215)
You will also find the latest specification text modules for SIVACON 8PS on the Internet:
http://www.automation.siemens.com/tip/html_76/support/ausschreibung.htm