Question

A bus coupler circuit breaker is utilized in a substation for
1. Joining the transmission line with station bus bar
2. Joining main and transfer bus in a substation
3. Joining the generator with transformer
4. Joining the neutral of generator with earth

Answer 1

Correct Answer - Option 2 : Joining main and transfer bus in a substation

• The main and transfer bus arrangement uses two types of bus bar namely, main bus bar and the auxillary bus bar.
• The bus bar arrangement uses bus coupler which connects the isolating switches and circuit breaker to the bus bar.
• The bus coupler is also used for transferring the load from one bus to another bus in case of overloading.