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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

A power transformer 4MVA/11KV/0.415Kv has been out of use in 12years. what maintenance actions/test need to be carried out before energizing.

466

In a Impedance Based Distance Relay (Quad Characteristics) - Could there be two different Line Angle(RCA) for Ph-Ph & Ph-Gnd? If So Kindly Let me Know.. Where, What are the advantages of the same?

513

How to calculate VCB rating for 33KV ,25 MW Power line?

593

Why we are use dol starter up to 10 hp

486

can we choose current transformer secondary, to calculate residual flux in a power transformer, so as its saturation is close to the saturation level of power transformer?

458

how to test power transformer.YNd11

569

300m long and 30kw inductive loade 3phase supply how many size cable required

527

How many size of cable required for a 300m long and 30kw inductive lode

473

Is it possible we are step down 11 kv to 230v ?

Fedco,

2 985

What will be the current drawn by HT motor, if low voltage is applied.. any formula to calculate the LT amps of HT motor.?

524

Which standard we are following earthing resistance test

486

Why is water motor not taking the pressure? what is the problem?

647

Why Water motor is not taking a load or pressure while everything is correct. (Note: Motor running properly)

483

What is safety of Ht panel

635

how to calculate the magnetizing current of ct ( 800A/1A) for Relay 64

Cadsys,

575


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Un-Answered Questions { Electrical Engineering }

work of choke in florocent tube circuit ?

1114


determine two methods to find loose connection in operational electrical system?

820


As per standard, transformer body earthing and other Equipment earthing (Equipment earthing) did not connect. but in LT side termination we are doing metal glanding in both side Transformer to PCC Panel through armoured cable, now X'mer body earthing and PCC Pane earthing (Equipment earthing) both are connect.is this safe for X'mer or other equipment?

717


how hydrogen cooled alternator undergo maintanence ? that is hydrogen when come in contact with air can result into explosions .

1047


Difference between low impedance and high impedance Restricted Earth Fault

2080






What is the maximum and minimum rating of UPS?

484


How to select HT/MV cable size ?

1496


why do we not use equivalent voltage source in negative sequence equivalent ckt.

1171


why we use sinosidal voltage / current instead of others in system?

1066


how to prepare the technical test

1123


can anyone explain 11kV 3core cable megger,hi pot test procedure with connection details?

2229


What is nyquist contour?

172


how the phase convertor changes the no. of phases

1141


What is a compensator?

174


Define super node?

172