Moderate

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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