In what situations relays are used in Circuit breaker? In Above what rating of Circuit breaker the relays are used? Why relays are not used for CB like MCB?
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we done magnetic balance test for 33KV /440V transformer in our company , but the ratio out is confusing us Voltage applied in RY = 440 , at RB = 320 and YB = 60 RY 440 = ( RB + YB ) 380 only Please let me know what type of problem is it.
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how to calculate the voltage drop in electrical cable while laying cables?
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