Question 7
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State the function of the following used in distribution network:
- substation;
- busbar;
- transformers;
- feeder;
- circuit breaker.
Observation
The expected responses were;
(a) Substation : It is a load center for receiving, transmitting and distributing electrical energy via power transformers .
(b) Busbars: These are the main bars or connections which offer convenient means of connecting switches and other equipment into various arrangements.
(c) Transformers: A transformer at the substation converts the incoming supply voltage to a lower or higher value which is fed either to the substation or distribution feeders.
(d) Feeder: This conducts power from a substation to load/consumer end.
(e) Circuit Breaker: An automatic device for interrupting the flow of current in an electric
circuit as a safety measure.
Many candidates who attempted this question did not do well.