What is the formula to calculate the rating of a three
phase air circuit breaker
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Answer Posted / Narendra Singh Selal
The rating (kVA) of a three-phase air circuit breaker can be calculated using the same formula as for a miniature circuit breaker: kVA = V * I, where V is the line-to-line voltage in volts and I is the maximum current in amperes that the circuit breaker can handle.
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