Power Factor Control of Three Phase Induction Motors

If an unbalanced supply is fed to an induction motor, it will cause excessive heating of

If one of the three phases of the induction motor fails due to fault. The motor will

Which tests are to be conducted to draw circle diagram for a given induction motor?
A. Running light test
B. Blocked rotor test
C. Voltmeter-Ammeter test

In double cage induction motor, inner cage has

Choose the most appropriate option regarding the power factor control of the induction motor.

A 3-phase, 400 V, 50 Hz delta connected induction motor has power factor of 0.35 when delivering 30% of its load. If it is star connected, then its

Static capacitors are used to control power factor of slip ring induction motor only.

As per the condition below,
If a 3-phase squirrel-cage induction motor is operating at a slip of -0.05 then machine will

A 3-phase induction machine is operating on 3-phase fixed frequency ac mains at a per unit slip of 1.5. Then machine is operating in generating mode

Induction motor can be fed from

Which of the following will not happen if one of the phases to the induction motor is not available?

A 3-phase induction machine is operating on 3-phase fixed frequency ac mains at a per unit slip of 1.5. Then which of the following statements follow the working condition?
I. It draws electrical power from the mains.
II. It draws mechanical power through the shaft.
III. It delivers electrical power to the mains.
IV. It delivers mechanical power through the shaft.

If the induction motor connected to a power grid draws real power P and reactive power Q. If it is made to run as a generator, then P and Q will be

The tests that are to be conducted to draw circle diagram for a given induction motor are
A. Running light test
B. Slip test
C. Voltmeter-Ammeter test

The 3-phase induction motor operates at lagging power factor due to
I. Leading magnetizing current necessary to produce the working flux.
II. Voltage drops in the leakage impedance.
III. Lagging magnetizing current which lags by 90° to the voltage