The making and breaking currents of  3-phase ac circuit breakers in power system are respectively in what form  ?

  • ARms value, rms value
  • BInstantaneous value, rms value 
  • CRms value
  • DInstantaneous value, Instantaneous value
Correct Answer : (B)

Instantaneous value, rms value 

Hints :

The most serious consequence of a major uncleared short-circuit fault could be


Which of the following results in a symmetrical fault?

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