Answer / nishad

The Motor will surely trip becaue by the sensing of under
voltage relay, it will give the trip command to the
breaker. once the breaker trip motor also trip. well in
cause of a small Voltage dip motor may not be trip. because
it's related to the setting of undervoltage relay.
somewhere it is set 2 second ( as per company's requirment)
if the power failure is more than set time of undervoltage
relay, motor trip

Answer / k.prakashchandra

It will trip,if the breaker of motor has a voltage operated
hold coil which also provides protection against low voltage.

Answer / asish

the motor will not be tripped as there is no fault as only
supply is off.

Answer / rajesh

as the supply power is constant, infinitely high current will flow through the circuit and hence the circuit breaker will trip.

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