Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a?

The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be?
Last Answer : The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be at the slot edge where coil enters or comes out of the slot.

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asked Mar 20, 2018 by anonymous

The starting winding of a single-phase motor is placed in?

Last Answer : The starting winding of a single-phase motor is placed in stator.

114 views 1 answer

asked Mar 20, 2018 by anonymous

A centrifugal switch is used to disconnect starting winding when motor has?

Last Answer : A centrifugal switch is used to disconnect starting winding when motor has picked up about 50 to 70 per cent of rated speed.

875 views 1 answer

asked Mar 20, 2018 by anonymous

In split phase motor main winding is of?

Last Answer : In split phase motor main winding is of thick wire placed at the bottom of the slots.

83 views 1 answer

asked Mar 20, 2018 by anonymous

How is a three phase cage induction motor self starting?

How is a three phase cage induction motor self starting?
Last Answer : Any type of induction motor is self starting. Because the reason for torqe production require two flux displaced by some angle theta.If theta is constant with time then torqe will be constant;if ... torqe also pulsating. In induction motor this angle theta is not pulsating.so it is self starting

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asked Mar 17, 2018 by anonymous

If a single phase induction motor runs slower than normal, the most likely defect is?

Last Answer : If a single phase induction motor runs slower than normal, the most likely defect is worn bearings.

170 views 1 answer

asked Mar 20, 2018 by anonymous

How does a single phase induction motor work?

How does a single phase induction motor work?
Last Answer : As we know that single phase induction is not self started because for self started we require atleast two revolving field but single phase induction motor has only one. So we provide extra ... 1phase IM classified as split phase IM, capacitor start capacitor run, capacitor start induction run.

124 views 1 answer

asked Mar 17, 2018 by anonymous

explain the working of single phase induction motor.

explain the working of single phase induction motor.
Last Answer : Stator has two winding namely main winding and auxiliary winding.when single phase ac supply is given to the motor,its produces alternating field.this field cut by a cage rotor.so some emf ... due to this emf,rotor flux produced.the interaction between two fluxes produce torque.so rotor rotates.

186 views 1 answer

asked Oct 24, 2017 by anonymous

Single Phase Induction Motor

Single Phase Induction Motor
Last Answer : Single Phase Induction Motor Single phase induction motor is mostly used in home, office, shop and many single phase appliances like pumps, ... torque and silent operation. It is uses where silent operation is required.

528 views 1 answer

asked Aug 9, 2017 by anonymous

In a split phase motor, the running winding should have?

Last Answer : In a split phase motor, the running winding should have low resistance and high inductance.

99 views 1 answer

asked Mar 20, 2018 by anonymous

List different starting methods of three phase synchronous motor. Explain any one of them.

List different starting methods of three phase synchronous motor. Explain any one of them.
Last Answer : Different Starting Methods of Three Phase Synchronous Motor: As synchronous motor is not self starting, different methods of starting are as follows: 1) By using an Induction (Pony) motor 2) ... . The rotor gets pulled into synchronism and starts running at constant speed as a synchronous motor.

156 views 1 answer

asked May 7, 2020 by anonymous

Explain the procedure to perform Short Circuit test on single phase transformer with circuit diagram.

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asked Apr 27, 2020 by anonymous

Explain power in single phase AC circuit.

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asked Mar 11, 2018 by anonymous

Describe the gate circuit for a single phase full converter.

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asked Mar 11, 2018 by anonymous

State suitable single phase motor for following applications: (i) Table fan (ii) Mixers and Grinders

State suitable single phase motor for following applications: (i) Table fan (ii) Mixers and Grinders
Last Answer : Application Suitable Single Phase Motor Table Fan 1) Capacitor split phase motor 2) Capacitor start capacitor run motor Mixers and Grinders 1) Universal motor 2) A.C. Series motor

96 views 1 answer

asked May 7, 2020 by anonymous

Why is a capacitor used in a single phase motor and not in three phase motor ?

Why is a capacitor used in a single phase motor and not in three phase motor ?
Last Answer : In 1-phase induction motor capacitor work is generate the auxiliary winding current than excite the main winding to rotor starts rotate. After rotor start rotating about 75% of their speed than auxiliary ... emf to start the motor.so,in 3-phase induction motor is self start induction motor.

259 views 6 answers

asked Sep 2, 2019 by anonymous

working principle of single phase motor

working principle of single phase motor
Last Answer : The Stator of single phase induction motor houses two windings 1. Main (Running) winding 2. Auxiliary (Starting ) winding Rotor of single phase induction motor is ... with starting winding or a capacitor may be permanently connected in series with Auxiliary (Starting ) winding.

167 views 1 answer

asked Aug 21, 2019 by anonymous

Explain the working of a single phase capacitor start induction motor.

Explain the working of a single phase capacitor start induction motor.
Last Answer : Single phase capacitor start induction motor https://youtu.be/31lvvzU5Puc

393 views 2 answers

asked Jul 30, 2019 by anonymous

What is the slip (as a percentage) when a 6 pole single phase induction motor operating on 220 V and 60 Hz is

What is the slip (as a percentage) when a 6 pole single phase induction motor operating on 220 V and 60 Hz is rotating at speed of 1140 rpm? A) 60% B) 5% C) 10% D) None of these
Last Answer : What is the slip (as a percentage) when a 6 pole single phase induction motor operating on 220 V and 60 Hz is rotating at speed of 1140 rpm? A) 60% B) 5% C) 10% D) None of these

125 views 1 answer

asked Apr 29, 2018 by anonymous

Single phase induction motor usually operates on?

Last Answer : Single phase induction motor usually operates on 0.6 power factor lagging.

126 views 1 answer

asked Mar 20, 2018 by anonymous

A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by...

A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will?
Last Answer : A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will not start at all.

230 views 1 answer

asked Mar 20, 2018 by anonymous

In a single phase motor the centrifugal switch?

Last Answer : In a single phase motor the centrifugal switch disconnects auxiliary winding of the motor.

269 views 1 answer

asked Mar 20, 2018 by anonymous

An unexcited single phase synchronous motor is ?

An unexcited single phase synchronous motor is ?
Last Answer : An unexcited single-phase synchronous motor is reluctance motor.

160 views 1 answer

asked Mar 18, 2018 by anonymous

what will happen when excitation of an unloaded salient pole synchronous motor suddenly gets disconnected?

what will happen when excitation of an unloaded salient pole synchronous motor suddenly gets disconnected?
Last Answer : When excitation of an unloaded salient pole synchronous motor suddenly gets disconnected the motor will stop.

367 views 1 answer

asked Mar 18, 2018 by anonymous

which single phase induction motor has highest starting torque?

Last Answer : Capacitor start motor has high torque in starting

133 views 1 answer

asked Sep 13, 2017 by anonymous

Damper winding in a synchronous motor

Damper winding in a synchronous motor
Last Answer : Damper winding in a synchronous motor Serves to start the motor.

87 views 1 answer

asked May 8, 2018 by anonymous

A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance

A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance is 2 Ohm. It. is braked by plugging. The resistance to be connected in series with armature to restrict armature current to 10 A, is
Last Answer : A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance is 2 Ohm. It. is braked by plugging. The resistance to be connected in series with armature to restrict armature current to 10 A, is 36 Ohm

329 views 1 answer

asked May 3, 2018 by anonymous

Centrifugal switch disconnects the auxiliary winding of the motor at about what percent of synchronous speed?

Last Answer : Centrifugal switch disconnects the auxiliary winding of the motor at about 70 to 80 percent of synchronous speed.

222 views 1 answer

asked Mar 20, 2018 by anonymous

The purpose of stator winding in the compensated repulsion motor is to?

Last Answer : The purpose of stator winding in the compensated repulsion motor is to improve power factor and provide better speed regulation.

110 views 1 answer

asked Mar 20, 2018 by anonymous

In synchronous motor, does the winding losses vary with load?

In synchronous motor, does the winding losses vary with load?
Last Answer : No, in the synchronous motor the winding losses do not vary with load.

512 views 1 answer

asked Mar 3, 2018 by anonymous

In a double squirrel cage induction motor, good starting torque is produced as

In a double squirrel cage induction motor, good starting torque is produced as (A) Large current flows through the outer high resistance winding. (B) Large current flows through the inner high ... the outer high resistance winding. (D) Large current flows through the inner low resistance winding.
Last Answer : In a double squirrel cage induction motor, good starting torque is produced as Large current flows through the outer high resistance winding.

136 views 1 answer

asked May 8, 2018 by anonymous

For the same H.P. rating and full load speed, following motor has poor starting torque?

Last Answer : For the same H.P. rating and full load speed, following motor has poor starting torque differentially compounded.

164 views 1 answer

asked Mar 20, 2018 by anonymous

The starting resistance of a D.C. motor is generally?

Last Answer : The starting resistance of a D.C. motor is generally low.

169 views 1 answer

asked Mar 20, 2018 by anonymous

For starting a D.C. motor a starter is required because?

Last Answer : For starting a D.C. motor a starter is required because it limits the starting current to a safe value.

123 views 1 answer

asked Mar 20, 2018 by anonymous

Is induction motor is self starting?

Is induction motor is self starting?
Last Answer : Single phase induction motor is not self starting. Three phase induction motor is self starting.

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asked Mar 17, 2018 by anonymous

The rotor developed by a single-phase motor at starting is?

Last Answer : The rotor developed by a single-phase motor at starting is zero.

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asked Mar 20, 2018 by anonymous

the volt per turn of a certain single phase transformers is 1.7. the transformer has a step ratio of 3825/255volt. calculate the respective number of turns in each winding

63 views 0 answers

asked Aug 13, 2019 by Alacrity

What are the five types of single phase motors used in the industry?

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asked Mar 15, 2018 by anonymous

Which type of winding is used in 3 phase shell-type transformer ?

Last Answer : Sandwich type winding is used in 3 phase shell-type transformer.

197 views 1 answer

asked Mar 19, 2018 by anonymous

In split-phase motor auxiliary winding is of?

Last Answer : In split-phase motor auxiliary winding is of thin wire placed at the top of the slots.

72 views 1 answer

asked Mar 20, 2018 by anonymous

The short circuit in any winding of the transformer is the result of?

Last Answer : The short circuit in any winding of the transformer is the result of impulse voltage.

174 views 1 answer

asked Mar 20, 2018 by anonymous

In A.C. series motor compensating winding is employed to?

Last Answer : In A.C. series motor compensating winding is employed to reduce sparking at the brushes.

145 views 1 answer

asked Mar 20, 2018 by anonymous

If the field winding of an unloaded salient pole synchronous motor is open circuited, the motor will?

Last Answer : If the field winding of an unloaded salient pole synchronous motor is open circuited, the motor will stop.

257 views 1 answer

asked Mar 20, 2018 by anonymous

The damping winding in synchronous motor is generally used to?

The damping winding in synchronous motor is generally used to?
Last Answer : The damping winding in synchronous motor is generally used to provide starting torque and prevent hunting.

157 views 1 answer

asked Mar 18, 2018 by anonymous

The armature current on symmetrical 3 phase short circuit of a synchronous machine (salient pole)

The armature current on symmetrical 3 phase short circuit of a synchronous machine (salient pole) (A) has q -axis current only (B) has d -axis current only (C) has both d and q axis currents (D) cannot be divided between q and d axis currents
Last Answer : The armature current on symmetrical 3 phase short circuit of a synchronous machine (salient pole) has d -axis current only

193 views 1 answer

asked Apr 29, 2018 by anonymous

The value of starting capacitor of a fractional horse power motor will be?

Last Answer : The value of starting capacitor of a fractional horse power motor will be 300 uF .

98 views 1 answer

asked Mar 20, 2018 by anonymous

A synchronous motor can be made self starting by providing?

A synchronous motor can be made self starting by providing?
Last Answer : A synchronous motor can be made self-starting by providing damper bar.

131 views 1 answer

asked Mar 18, 2018 by anonymous

anonymous · Answer 1 · 2018-03-20T19:35:39+0000

Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a magnetic relay.

Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a?

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