Single phase induction motor usually operates on?

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asked Mar 20, 2018 by anonymous

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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.

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100 views 1 answer

asked Apr 29, 2018 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

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79 views 1 answer

asked Mar 20, 2018 by anonymous

After the starting winding of a single phase induction motor is disconnected from supply, it continues to run only on?

Last answer: Reason is kinetic energy

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130 views 2 answers

asked Jul 30, 2019 by anonymous

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

Last answer: Single phase capacitor start induction motor https://youtu.be/31lvvzU5Puc

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149 views 2 answers

asked Mar 20, 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.

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108 views 1 answer

asked Mar 17, 2018 by anonymous

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.

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92 views 1 answer

asked Oct 24, 2017 by anonymous

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.

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104 views 1 answer

asked Aug 9, 2017 by anonymous

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.

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450 views 1 answer

asked Mar 20, 2018 by anonymous

The running winding of a single phase motor on testing with meggar is found to be ground...

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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85 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.

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129 views 1 answer

asked Mar 20, 2018 by anonymous

The power factor of a single-phase induction motor is usually?

Last answer: The power factor of a single-phase induction motor is usually lagging.

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99 views 1 answer

asked Mar 21, 2018 by anonymous

Induction type single phase energy meters measure electric energy in?

Last answer: Induction type single phase energy meters measure electric energy in kWh.

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236 views 1 answer

asked Apr 16, 2020 by anonymous

Explain with neat circuit diagrams the procedures to perform no load and blocked rotor tests on three phase induction motor

Explain with neat circuit diagrams the procedures to perform no load and blocked rotor tests on three phase induction motor.

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85 views 0 answers

asked Apr 16, 2020 by anonymous

Explain the need and steps to conduct the reduced voltage running up test on the three phase induction motor.

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58 views 0 answers

asked May 7, 2020 by anonymous

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

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53 views 1 answer

asked Sep 2, 2019 by anonymous

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.

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127 views 6 answers

asked Aug 21, 2019 by anonymous

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.

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93 views 1 answer

asked Mar 20, 2018 by anonymous

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

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

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153 views 1 answer

asked Mar 18, 2018 by anonymous

An unexcited single phase synchronous motor is ?

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

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86 views 1 answer

asked Jul 30, 2019 by anonymous

State any four advantages of three phase induction motor.

Last answer: Advantages of three phase induction motor https://youtu.be/27OIOCKN05U

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100 views 2 answers

asked Sep 20, 2018 by anonymous

Split phase induction motor

Last answer: Split phase induction motor : There are two windings used in split phase induction motor. It is a type of single-phase induction motor. There are two winding one is called main winding and ... motor have low starting torque it is used for small fans, blowers, centrifugal pumps, grinders etc.

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178 views 1 answer

asked Apr 29, 2018 by anonymous

The slip of 400 V, three phase, 4 -pole induction motor when rotating at 1440 rpm is

Last answer: The slip of 400 V, three phase, 4 -pole induction motor when rotating at 1440 rpm is 4 percent

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169 views 1 answer

asked Mar 17, 2018 by anonymous

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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95 views 1 answer

asked Mar 3, 2018 by anonymous

What is mean by plugging in three phase induction motor?

Last answer: Plugging in three-phase induction motor means interchanging of any two phases of a stator for quick stopping.

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127 views 1 answer

asked Oct 4, 2017 by anonymous

how can we reverse the direction of rotation of three phase induction motor?

how can we reverse the direction of rotation of three phase induction motor ?

Last answer: The direction of rotation of three phase induction motor can be reversed by plugging i.e by changing any two out of three phases of the supply to the stator of the Induction motor terminal.

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100 views 1 answer

asked Aug 9, 2017 by anonymous

speed control methods of three phase induction motor?

Last answer: Speed control of three phase induction motor

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196 views 2 answers

asked Mar 20, 2018 by anonymous

A single-phase induction motor is?

Last answer: A single-phase induction motor is inherently non-self-starting with low torque.

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50 views 1 answer

asked Mar 26, 2018 by anonymous

The number of poles in a phase induction motor at 50 Hz and running at 1500 rpm will be?

Last answer: The number of poles in a phase induction motor at 50 Hz and running at 1500 rpm will be 4.

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64 views 1 answer

asked Apr 25, 2018 by anonymous

The disc of a single phase Induction-type energy meter makes 60 revolutions in 6 minutes. Meter Constant is

The disc of a single phase Induction-type energy meter makes 60 revolutions in 6 minutes. Meter Constant is 1200 rev/kWh. Power consumption in the load is (A) 1.2 kW (B) 1 kW (C) 600 W (D) 500 W

Last answer: The disc of a single phase Induction-type energy meter makes 60 revolutions in 6 minutes. Meter Constant is 1200 rev/kWh. Power consumption in the load is 500 W

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140 views 1 answer

asked Apr 29, 2018 by anonymous

In a single-phase induction motor, the operating direction is determined by the ________

In a single-phase induction motor, the operating direction is determined by the ________ A) Rotor B) Stator C) Starting circuit D) None of these

Last answer: In a single-phase induction motor, the operating direction is determined by the Starting circuit

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78 views 1 answer

asked Apr 28, 2018 by anonymous

In a single-phase induction motor when the rotor is stationary and voltage is applied to the stator, then

In a single-phase induction motor when the rotor is stationary and voltage is applied to the stator, then (A) the flux is constant (B) the flux first decreases and then increases in the same direction (C) the flux increases and decreases in the opposite direction with the same magnitude (D) current flows through the rotor

Last answer: In a single-phase induction motor when the rotor is stationary and voltage is applied to the stator, then the flux first decreases and then increases in the same direction

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75 views 1 answer

asked Mar 20, 2018 by anonymous

If starting winding of a single-phase induction motor is left in the circuit, it will?

Last answer: If starting winding of a single-phase induction motor is left in the circuit, it will draw excessive current and overheat.

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185 views 1 answer

asked Sep 13, 2017 by anonymous

which single phase induction motor has highest starting torque?

Last answer: Capacitor start motor has high torque in starting

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93 views 1 answer

asked Apr 27, 2020 by anonymous

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

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69 views 0 answers

asked Apr 29, 2018 by anonymous

What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016

What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these

Last answer: What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these

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135 views 1 answer

asked Dec 12, 2017 by anonymous

write short notes on single phase system.

Last answer: A "phase" in an electrical system is often referred to as the waveform (may be voltage or the current) of the power supply. The waveform in an AC system is typically ... domestic household or commercial supplies and street lighting. Industrial supplies requires three phase electrical supply .

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82 views 1 answer

asked Apr 29, 2018 by anonymous

A 400 V, 50 Hz three-phase induction motor rotates at 1440 rpm on full -load. The motor is wound for

Last answer: A 400 V, 50 Hz three-phase induction motor rotates at 1440 rpm on full -load. The motor is wound for 4 poles

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117 views 1 answer

asked Mar 20, 2018 by anonymous

The rotor slots, in an induction motor, are usually not quite parallel to the shaft because it?

Last answer: The rotor slots, in an induction motor, are usually not quite parallel to the shaft because it helps in reducing the tendency of the rotor teeth to remain under the stator teeth.

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118 views 1 answer

asked Mar 20, 2018 by anonymous

The repulsion start induction run motor is used because of?

Last answer: The repulsion-start induction-run motor is used because of high starting torque.

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61 views 1 answer

asked Mar 20, 2018 by anonymous

Direction of rotation of a split phase motor can be reversed by reversing the connection of?

Last answer: Direction of rotation of a split phase motor can be reversed by reversing the connection of either running winding or starting winding.

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143 views 1 answer

asked Mar 20, 2018 by anonymous

In a split phase motor?

Last answer: In a split phase motor the starting winding is connected through a centrifugal switch.

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49 views 1 answer

asked Mar 20, 2018 by anonymous

In a capacitor start motor, the phase displacement between starting and running winding can be nearly?

Last answer: In a capacitor start motor, the phase displacement between starting and running winding can be nearly 90°.

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129 views 1 answer

asked Mar 20, 2018 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.

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68 views 1 answer

asked May 21, 2020 by anonymous

Draw single phase full wave mid-point converter for inductive load. Draw input and output waveforms for it.

Last answer: Circuit Diagram: Waveforms:

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asked May 16, 2020 by anonymous

Single phase transformer

Last answer: Single phase Transformer Transformer

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asked May 7, 2020 by anonymous

Explain MCB and ELCB with connection diagram supplying single phase load.

Last answer: OR OR Explanation: * MCB provides short circuit protection. * MCB provides overload protection * ELCB provides earth fault protection. * MCB is in series with ... occurs, the ELCB cuts off the power within the time of 0.1 sec. automatically to protect the personnel.

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202 views 1 answer

asked Aug 13, 2019 by Alacrity

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

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49 views 0 answers

asked Jul 26, 2019 by anonymous

Explain construction and working principle of single phase transformer.

Last answer: A single phase transformers is an electrical device that accepts single-phase AC power and outputs single-phase AC. PRINCIPLE... The single-phase transformer works on the principle of ... and secondary windings. Thin steel laminations shall be employed to prevent power losses from the core.

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333 views 4 answers

asked Jul 25, 2019 by anonymous

Give the operation of single phase full wave bridge controlled converter with RL load with a neat diagram. Also draw its waveform.

Last answer: Single phase fully control bridge converter with RL load: 1. During positive half cycle of input voltage, T1 and T2 are forward biased and during negative half cycle, T3 and T4 are forward biased. Therefore, T1-T2 ... cycle till the firing of next pair of SCRs as shown in the waveform.

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161 views 1 answer

asked Aug 11, 2018 by anonymous

State advantages of three phase over single phase.

Last answer: Advantages of 3-phase system over 1-phase system: - 1. More output: For the same size, output of poly-phase machines is always higher than single phase machines. 2. Smaller size: For ... are self- starting: The three phase ac motors are self starting, while single phase induction motor are not.

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2.8k views 4 answers

anonymous · Answer 1 · 2018-03-20T19:13:01+0000

answered Mar 20, 2018 by anonymous

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

Single phase induction motor usually operates on?

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