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When a number of generators or feeders operating at the same voltage have to be directly connected
electrically, bus-bars are used as the common electrical component. *Bus-bars are copper rods or
thin walled tubes and operate at constant voltage. We shall discuss some important bus-bars arrangements used for power stations and sub-stations. All the diagrams refer to 3-phase arrangement but are
shown in single-phase for simplicity.
(1) Single Bus-bar System. The single busbar system has the simplest design and is used for
power stations. It is also used in small outdoor
stations having relatively few outgoing or incoming feeders and lines. Fig. 16.2 shows the single
bus-bar system for a typical power station. The
generators, outgoing lines and transformers are
connected to the bus-bar. Each generator and
feeder is controlled by a circuit breaker. The isolators permit to isolate generators, feeders and circuit breakers from the bus-bar for maintenance.
The chief advantages of this type of arrangement
are low initial cost, less maintenance and simple
Disadvantages. Single b...
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- Spring '12
- Electrical Engineering, Short circuit, Fuse, Circuit breaker