Bus coupler is very essential in arrangement______________?
Correct answer: C. main and transfer bus
- A. single bus
- B. double bus, double breaker
- C. main and transfer bus
- D. all of the above
Explanation
In a main-and-transfer-bus scheme, the bus coupler connects the main and transfer buses so a circuit can be shifted during breaker maintenance. It is not essential in every double-bus arrangement.
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