Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is the different between feeder & bus?

IOCL,

3 16994

what is the purpose of taking HV test in LT panel.

PCE,

1 6266

In EDO ACBs what is a purpose of closing coil and motor, what is the operation of these devices are they inetconnected. means if we give supply to motor and by BCS we charge Closing coil,what exact is operation is and how it charge a spring of ACB. Sir if anybody has an wiring diagram please send me the link to operate and EDO breaker.

PCE,

1603

We use MCCB not MCB for motor starters because MCCBs has capablity to drawout the motor starting current which is 5-6 times the full load current of motor for 1sec. Then why we use SDF in starter panel means MCC panels. Pls reply if any one knows this answer.

1 1930

After doubling voltage from solar cells & use step down voltage transformer can we get high current output with low voltage.

Transco,

1456

What happens instead of using 3 phase, if we give loop of single phase to all three phases ??

1 3536

What difference between TRANSFORMERS and TRANSDUCERS???

1 17011

What is skin effect?

2 3790

Dry type transformers

1380

description about dry type transformers

1453

oil cooled transformer

Jindal,

1741

how to define vector group of transformer

Engro, Reliance, TATA,

1 4873

What is the purpose of reactor in over head transmission line.Can you any explain it.

Dr Reddys, L&T, Reddy Labs,

2 4030

What are protection of power transformer?

1 3529

How to Select transformer for 100HP motor plz... With calculation

Rasandik,

2 4209


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Un-Answered Questions { Electrical Engineering }

what is feeder bay?

1085


ROC converges if poles and zeros lie inside a. Origion b. Z=1

1757


how synchronous condenser is used in place of synchronous generator with out negotiating IEEE standards? Can i use 3 generators as synchronous generators and 2 generators as a synchronous condensers in an IEEE 14 bus system with out disturbing the standards?

1613


What is gain margin?

605


what are the precuation should be taken ahen installing power transformer,circuit breaker,current & potential transformer

1558






acb(AIR CIRCUIT BREAKER)NOT CHARGING AUTO

1807


how to calculate magnetic force genrated by a coil ?

1696


What is the equivalent circuit of a transformer and its vector diagram?

2137


What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer?

1534


HOW TO CALCULATE HV CABLE SIZING?

2533


I need to connect a synchronous generator to the grid using automatic synchronization and two circuit breakers (one for synchronization, one for end connection to the grid), how to determinate the required diameter of the cables?

2018


Dear friends I want to design busbar for1600 kva transformer(i.e2100 amps) what are all the factors to be considered before selectinga busbar what are all the standard sizes of busbars what is the formula for finding current of copper and aluminium busbar

1458


what is the difference between an alternator and a synchronous motor

1539


Name two types of electrical analogous for mechanical system.

695


XYZ

1659