Answer Posted / rajesh
During faults (short-circuits), fault currents have two
components- AC component (Periodic) and DC Component
(Aperiodic). DC component will be decayed as per system X/R
ratio. circuit breakers are manufactured and tested to
break the fault current of specific AC component (Ib) and
DC component(Idc). Together can be called as Asymmetrical
breaking current.
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