Why induction motor rotat anticlockwise ? how induction motor rota anticlockwise?in detail?

yogesh saini

• May 1st, 2015

In the induction motor rotor always rotates in the direction of rotating magnetic field .if field direction is anticlockwise then rotor also rotates in same direction to oppose the cause of cutting ma...

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Why induction motor rotates anticlockwise?
indetail

prakash perumandla

• Mar 23rd, 2015

In order to achieve minimum relative speed b/w rotor current and stator magnetic field induced.

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Why covered with alluminium on both end of the induction motors rotor? and what is the uses for it?

parshv

• Feb 12th, 2015

In the I.M. rotor consists of uninsulated copper or aluminium bars called rotor conductors. The bars are placed in the slots. The bars are permanently shorted at each end with the help of conducting c...

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what is harmonic and how it is generated? Is it useful to us?

surendar

• Apr 1st, 2015

Harmonics are nothing but multiples of fundamental frequency components. they are not useful because the overall output deceases due to harmonics.

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Asif Iqbal

• Apr 16th, 2015

Earth?

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Identify the operating system strategies on which modern operating systems are built?

Batch
Timesharing
Dedicated
All of the mentioned options

venky

• May 20th, 2015

Batch

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In which of the following type of scheduling, the processes may take very long time to complete, thus holding up other waiting processes in the queue?

Co-operative scheduling

Round Robin scheduling

FIFO scheduling

Priority scheduling

Dan

• Jun 1st, 2015

FIFO (First In First Out) scheduling

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I am last year Electrical Engineering student.I am interested in Electrical Machines and Power System . What can I do with these subjects as a final year project?

M.V.S.S.CHANDRA

• May 29th, 2015

You can do good number of projects on power systems but limited projects will be available in the area of machines.however if u are very much particular you can find good projects but not many without...

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A) IDMT relay are mostly used for protection against?
1) Earth Fault 2) Inter turn fault 3) Overloading 4) None of the above

B) Which device is provided as backup of buchholz relay?

C) Name any two devices used for protection of power transformer against internal faults?

Manojkumar1990

• Oct 25th, 2015

A) IDMT relay is mostly used for the protection against overloading
B & C) REF & differential protections are used to protect the power transformer from internal faults and one of this both protections may used for backup of Buchholz relay.

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How does Slip Power Recovery System work? How to capture supply for recovery? Is it any possibility to design model of slip power recovery system drive?

Santosh

• Jan 10th, 2016

Of course, there are different methods to recover the power wasted in rotor and that is done by using Scherbius Drive or Kramers Drive where the rotor terminals are connected to a rectifier and again...

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How can we make wattmeter to measure reactive power?

Amol takate

• Jan 27th, 2016

For calculation of the reactive power in 3 phase connected load procedure is to connect the current coil of single phase wattmeter in any phase series with the load and connect the pressure coil acros...

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What are the technical reasons for Soaking Test in Transformer and Switch Gear?

ali raza

• May 26th, 2016

I think the transformers are soaked with normal operating voltage level as testing with HV of the transformer insulation, winding at site is impractical as well not economical. Besides soaking allows ...

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How to calculate the NGR resistance to connect in alternator / transformer. I mean to say thumb rule of NGR against MW capacity of alternator / transformer.

Aadil

• Jul 1st, 2016

NGR or Neutral Grounding Resistors are used to limit the ground fault current to a safe value in the event of earth fault. A NGR limits the earth fault current to a value which will be sufficient to operate protective relays and prevent unwanted fault damage.

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Explain How to Start a Induction Motor?

Viral p. patel

• May 28th, 2016

When we give the supply to starter winding. The alternating flux will be produce. That flux link with rotor winding through core. Then the current will be produced in rotor winding. The rotor winding ...

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What is the main difference between Transformer based UPS and Transformer less UPS and its operation?

Dheeraj Rai

• May 22nd, 2016

Transformer Based UPS Transformers in general are used for number application, the most obvious one is to stepping up or down the voltage. In UPS application they are also used: To create galvan...

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What are the elements in electrical engineering?

Josue

• May 30th, 2016

Resistors, Capacitors and Inductors

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Why 660v is use in place of 440v in some big KW motor?

A Rudrendra

• Jul 14th, 2016

It is the secondary standard voltage level in LT side and by using this voltage we can reduce the motor rated current.

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What is the physically meaning of form factor?

amit gupta

• Sep 29th, 2016

Form Factor = R.M.S. Value / Average Value = 1.11

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How much of power can I generate before connecting it to step up transformer presently?

Chand

• Nov 3rd, 2016

We can generate 11 kv

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1) What does active, reactive and apparent means practically?
2) What happens when variable frequency is passed through transformer?

tariq faridi

 Profile Answers by tariq faridi Questions by tariq faridi

• Jan 25th, 2017

If variable frequency is given to transformer then the EMF generated is variable due to which load varies a lot with change in voltage hence it will damage the windings of transformer...

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