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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is the different between feeder & bus?

IOCL,

3 14933

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

PCE,

1 4299

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,

1081

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 1246

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

Transco,

1027

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

1 2857

What difference between TRANSFORMERS and TRANSDUCERS???

1 15484

What is skin effect?

2 2926

Dry type transformers

905

description about dry type transformers

983

oil cooled transformer

Jindal,

1282

how to define vector group of transformer

Engro, Reliance, TATA,

1 4019

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

Dr Reddys, L&T, Reddy Labs,

2 2955

What are protection of power transformer?

1 2809

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

Rasandik,

2 3141


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Un-Answered Questions { Electrical Engineering }

In between UPS out going changer over switch and ups raising main input, both side cable gland producing heat but the cable doesn't get heat,Why?

1182


Why neutral is not used in three phases dol starter

941


How many types are using in 220kv/400 kv swith yard

1292


What are the Full Forms of TVM, MTL, CVT ?

193


What is error of a measurement?

158






what is the difference between switchgear and circuit breakers and is there any difference between outdoor and indoor switchgear and circuit breakers , and how would you differentiate between switch yard and substation and grid station . thanks

1194


how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating)?

1233


i want to put single phase load on scott connected transformer,eventhough how to balance the transformer.

987


For RCD (Residual current device) Icu is defined. How i can find Ics for them?

1114


what is package substation.how many types they have

1214


what is meant by k-rating in isolation transformer?what is k9, k14 stands for?

1570


Define relative stability.

162


Which capacitor is preferred for high voltage and frequency?

169


what is the effect of back reactive power on the generator ?

1239


In layman terms, what is the difference of Dielectric strength and dielectric constant when speaking of an insulating oil

1606