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© Siemens AG 2007<br />
Busbar Trunking <strong>System</strong>s, Overview<br />
Busbars instead of cables<br />
■ Overview<br />
Easier when it comes to planning<br />
Easy to plan, quick to install and flexible to use: Siemens busbar<br />
trunking systems are the economical answer for conveying<br />
power into any building. The power distribution system can be<br />
precisely planned from the total load rating and the type and<br />
number of loads. Clarity is assured by the line-shaped network<br />
topology with regularly arranged load feeders. All applications<br />
can be implemented in less time and space with standardized<br />
sizes.<br />
Quicker when it comes to installing<br />
Benefits during installation: busbar trunking systems can be installed<br />
by two persons, saving time and money compared to the<br />
costly cable installation method. Installation errors are practically<br />
ruled out by the safe and user-guided connection technology.<br />
No special tools are required. Another benefit for quick installation:<br />
Siemens busbar trunking systems are easy to fasten<br />
and have large intervals between supports (busbars up to 4 m,<br />
cables every 1.5 m).<br />
Siemens busbar trunking systems are an economical alternative<br />
to the cable installation method.<br />
High short-circuit resistance and<br />
minimum fire load result in greater safety<br />
A step-ahead in terms of safety – be it short-circuit resistance or<br />
fire load. For example, the BD2A-250 busbar trunking systems<br />
have a fire load of only 1.32 kWh/m; comparable cables (NYY<br />
4× 95/50mm 2 ) have 5.19 kWh/m by contrast. And the busbars<br />
are halogen-free. Siemens busbar trunking systems have a high<br />
short-circuit resistance. Also, the near-load protection against<br />
short-circuiting simplifies troubleshooting.<br />
2<br />
High fire load with cables<br />
With cable installation, new loads are connected by way of an additional<br />
sub-distribution board, which is costly and time-consuming<br />
Tap-off units near the loads make local arrangements more transparent<br />
Low fire load with busbar trunking<br />
More flexible in case of expansions and modifications<br />
If the power distribution system has to be adapted to new<br />
requirements, the busbar will take you quicker to your goal.<br />
For example, new tap-off units can simply be mounted on the<br />
tap-off points. The system can be expanded and modified without<br />
difficulty. Tap-off units and system parts increase the flexibility.<br />
Cost-intensive downtimes are eliminated or minimized. The<br />
power distribution system enables faultless operation with high<br />
user-friendliness and safety.<br />
Siemens LV 70 · 2006<br />
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