Rupturing capacity of circuit breaker is

Rupturing capacity of circuit breaker is

Right Answer is:

The maximum current the circuit breaker can interrupt

SOLUTION

The rupturing capacity (or breaking capacity) of a circuit breaker is the maximum short-circuit current that it can safely interrupt without being damaged or causing an unsafe condition.

  • Expression: It is usually expressed in mega volt-amperes (MVA).
  • Calculation: It is calculated as the product of the rated breaking current in kiloamperes (kA) and the rated voltage in kilovolts (kV).
  • For example, a circuit breaker with a rated breaking current of 10 kA and a rated voltage of 20 kV would have a rupturing capacity of 200 MVA (10 kA * 20 kV). This means it can safely interrupt a fault current of 10 kA at a voltage of 20 kV.

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