Answer / pradyumna171

Zero

Answer / dhaval raval

Back emf is directly proportional to the angular speed of motor hence its zero at starting

We use MCCB not MCB for motor starters because MCCBs has capablity to drawout the motor starting current which is 5-6 times the full load current of motor for 1sec. Then why we use SDF in starter panel means MCC panels. Pls reply if any one knows this answer.

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