2nd October 2019


What is meant by Restriking voltage?

Recovery voltage is the normal frequency rms voltage that appears across the contacts of the circuit breaker after complete interruption of the arc (i.e after the transient oscillation dies out). Re striking voltage is is the voltage that appears across the contacts at the instant of arc extinction.

Also asked, what is breaking current of circuit breaker?

Breaking capacity. Breaking capacity or interrupting rating is the current that a fuse, circuit breaker, or other electrical apparatus is able to interrupt without being destroyed or causing an electric arc with unacceptable duration.

What is current chopping in circuit breakers?

Current Chopping in circuit breaker is defined as a phenomena in which current is forcibly interrupted before the natural current zero. Current Chopping is mainly observed in Vacuum Circuit Breaker and Air Blast Circuit Breaker. Current chopping is predominant while switching Shunt Reactor or unloaded Transformer.

What is the meaning of ICS 100 ICU?

Isc is usually expressed as value of prospective breaking current in percentages (25%,50%, 75%, 100%) of Icu. For example: If Ics = 15kA and Ics=100% Icu, it means that device can break ultimate short circuit 15kA more than one time.
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