Explain What is Phase Advancer?

mallick.subratkumar

 Profile Answers by mallick.subratkumar Questions by mallick.subratkumar

• Apr 8th, 2010

It is like an power factor improvement deviceIt maintains the phase sequence of the linelike lag-lead compensator.

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What is the difference between neutral circuit and core balance circuit protection?

Raman Jain

 Profile Answers by Raman Jain Questions by Raman Jain

• Nov 25th, 2011

In neutral circuit protection , the CT is placed in neutral conductor and it is true earth fault protection.
on the other hand , in core balance protection the CT is placed in 3-phase cable and measured the unbalanced current in the cable. So it is protection against the unbalance between phases.

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Two electrically operated Vibro Motors are fixed in parallel direction in vibrating feeder. What is the direction of both Vibro Motors?

apuelectrical

 Profile Answers by apuelectrical Questions by apuelectrical

• Jun 9th, 2010

Anti-Clock Wise

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What is the importance of quality factor in resonance?

thakur.rajesh.ranjan

 Profile Answers by thakur.rajesh.ranjan Questions by thakur.rajesh.ranjan

• Sep 27th, 2010

Sinusoidally driven resonators having high quality factor resonates with greater amplitudes but have a smaller range of frequencies around that frequency for which they resonates. Thus a high Q (quali...

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What is corona effect ? How this is avoided in transmission?

silverscythe

 Profile Answers by silverscythe Questions by silverscythe

• Jul 2nd, 2010

Corona Effect is the high voltage electric discharge phenomenon that can be observed between two transmission lines or for that matter any two lines carrying electricity. This occurs generally when th...

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How to convert a single phase supply to a 3 phase balanced supply?

raviiisc

 Profile Answers by raviiisc Questions by raviiisc

• Jul 14th, 2010

The are two methods.1. First convert 1-ph AC into DC by using converter, then that DC is converted to AC by using the power electronic circuit named as three phase inverter using any modulation t...

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In which degree synronizing has to be done in a 3 phase alternator?

mgbushan

 Profile Answers by mgbushan Questions by mgbushan

• Aug 24th, 2010

When you have to synchronize the alternator with the reference bus, then The voltage, Phase angle, frequency difference of the alternator with refernce to the bus reaches within the tolerable set...

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What is the importance of quality factor in resonance?

sujit.185

 Profile Answers by sujit.185 Questions by sujit.185

• Aug 5th, 2010

QUALITY FACTOR actually signifies the voltage gain or voltage amplification factor of a given ckt.

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What will you do when D.G. set gets tripped?

Raman Jain

 Profile Answers by Raman Jain Questions by Raman Jain

• Jan 3rd, 2011

First see at what indications D.G set get tripped. Find the cause and rectify . Than again start the DG set. 

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What do you do if your DG Set is not taking load?

Dineshkumar

• Sep 17th, 2011

First check the AVR working properly or not if DG Have no Output means AVR is faulty.

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Though transformer consist winding which usually cause reactive power change in both generator and motor but it wont affect reactive power passing through transformer why?

Dnyanesh

• Jun 7th, 2014

In rotating motor, power factor can not be maintain at unity bcz these all are inductive, but in case of transformer, we can maintain the power factored at unity, and whenever pf is unity, there will be zero reactive power

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The bulb has a rating of 500W for 220V, if the voltage is 110V, What is the power of the Bulb?

mohit parashar

 Profile Answers by mohit parashar Questions by mohit parashar

• Jul 28th, 2010

Given:p=500WV=220VP=VII=2.27Athan by ohm's lawV=IRso R=96.91Ohm which is constant.if V=110Vthan I become 1.135AsoP=VIP=125W.

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What is harmonics and how they are produce in electrical machine?

ravs42

 Profile Answers by ravs42 Questions by ravs42

• Aug 6th, 2010

Harmonics are the integral multiples of the fundamental values of current/voltage quantities. Generally it is caused due to non linearity caused by the load which adversely affects the supply side. Main impacts occurs in capacitors, telecommunication lines, power transformers, etc.

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Why and when we use single phase and three phase?

raviiisc

 Profile Answers by raviiisc Questions by raviiisc

• Oct 31st, 2010

This is the most common question.Whenever we are dealing with large quantity of power we use the Three phase system rather than the single phase system. The cause is the cost of eqipment is more....

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In single phase induction motor, what is phase? what is induction? Why only this motor used in fans?

guntur.srikanth

 Profile Answers by guntur.srikanth Questions by guntur.srikanth

• Sep 30th, 2010

Mainly the induction motor works with mutual induction principle that is why we are using them in fans

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What is the processing of power plant and what are the equipment used for coal handling power plant?

Raman Jain

 Profile Answers by Raman Jain Questions by Raman Jain

• Jan 3rd, 2011

There are various equipments used in the Coal Handling Plants :1. Wagon Tipplers : to unload the coal wagons2. Stacker - Reclaimers : stack and reclaim the coal in/from stock yard.3. Conveyor Belts : ...

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If mutual flux is 1.2 Wb, power factor if 0.8 lag, then what is the useful flux of a Transformer?

Nitish saini

• May 9th, 2017

Mutual flux will remain constant 1.2 wb

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What steps to consider to perform a project?

Chip Tausch

• Sep 26th, 2012

Ask what is the problem, progress and constraints? Imagine some solutions, brainstorm ideas and choose the best one. Create a plan, draw up a diagram and list needed materials Follow your plan and cre...

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A 3phase wye/delta transformeris rated 225kV/24kV, 400MVA and has a series reactance of 13.3ohms as referred to its high voltage side. The transformer is supplying a load of 325MVA at 0.9 pf lagging at a voltage of 24kV(line to line)on its low voltage side. It is supplied from a feeder whose impedances are (0.15+j1.5)ohms connected to its high voltage terminals. For these conditions calculatea> The...

mahmoudp1

 Profile Answers by mahmoudp1 Questions by mahmoudp1

• May 10th, 2012

???
incorrect information
you should specify at least on of the terminals voltages

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What can be the possible causes of Vibration in HT motors?

Raman Jain

 Profile Answers by Raman Jain Questions by Raman Jain

• Jan 2nd, 2011

Vibrations in HT Motors may be due to several reasons :1. Mis-alignment 2. Worn Bearing3. Loose foundation bolts.4. Unbalance rotor                      etc.

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