52) What happens to a 3 phase induction motor if one phase fails during running?

Motor runs normally

Motor stop instantaneously

Motor runs slowly, finally it burns

Motor runs with irregular speed

Answer is:

Motor runs slowly, finally it burns

Motor stops at once

Motor will run normally

Motor runs with humming noise with slow speed

Motor will run slow speed but winding will be burnt out shortly

Answer is:

Improper phase sequence

Fluctuations in line voltage

Loose contact in supply lines

Wrong terminal connections at motor

Answer is:

Wrong motor connection

Wrong starter connection

Open circuit in rotor winding

Partially shorted stator winding

Answer is:

Short circuit

Open circuit

Over current

Under voltage

Answer is: