what is the ka rating of mccb.
and how it is decided .
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Answer / aditya shirbavikar
The rating of any circuit breaker is decided on the basis of its breaking capacity. so, the KA rating of MCCB is the unsymmetrical breaking capacity for a particular time.
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Answer / s.lenin
The KA Rating of MCCB is Defined as maximum current flowing
through the conductor or with standing capacity of the
breaker.the KA is decided mostly that incoming transformer
fault current
| Is This Answer Correct ? | 1 Yes | 0 No |
The value of the kA rating determines how much current the circuit breaker can withstand under fault conditions. The circuit breaker only has to withstand this for a brief period of time, usually the time it takes for the circuit breaker to trip. For example, a value of 6kA means that the circuit breaker can withstand 6,000 amps of current during the brief time it takes to trip.
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