Thermal circuit breaker has

Electrical Engineering MCQ on Power System Protection

Thermal circuit breaker has

  1. Delayed trip action
  2. Instantaneous trip action
  3. Both of these
  4. None of these

Correct answer: 1. Delayed trip action

About Circuit breakers

Circuit breakers are the “final control elements” of the electric power industry, akin to control valves in the process industries. They are strictly on/off devices, used to make and break connections under load in power systems. Circuit breakers automatically open when dangerous circuit conditions are detected. Continue reading here

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