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Electromagnetic field generated from the stator does not rotate.It is a repeater between the poles as the poles alternating ac voltage changes polarity.
The induced voltage in the rotor is the result of magnetic induction, and then the magnetic field produced around the rotor.This field is opposite to the stator field (Len `z Law).
MCB (Miniature Circuit Breaker ( BS 3871 ) is a mechanical device operate automatic operation designed to connect and disconnect the electrical circuit in the ordinary and extraordinary situation.Suitable for AC and DC voltage.It mean main function is to protected equipment or circuit from overload and short circuit.
The size of MCB is small and usually use for household appliance and domestic.Average fix ampere rating from 6 Amp up to 125 Amp. It can be reset back to the normal condition after trip but cannot adjusted ampere rating.It can be found for single phase 1ø and three phase 3ø voltage power supply.
