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ABB Electrical Engineering Interview Questions
Questions Answers Views Company eMail

HOW DISTANCE PROTECTION IS DONE IN EHV TRANSMISSION LINES? WHAT IS THE BASIC TECHNIQ OR FUNDA USED BEHIND THIS ? SPECIALLY EXPLAIN?IMPEDANCE METHOD.

2 5153

WHEN THESE TRANSFORMERS WINDINS CONFIGURATION ARE USED? SPECIALLY EXPLAIN REGARDING STEP UP AND STEP DOWN KEEPING IN MIND.AND REGARDING LOAD ALSO. a.star to delta b.delta to star c.delta to delta d.star to star ALSO EXPLAIN WHY V USE 415/415 TRANSFORMERS IN TUBEWELLS?

1 2278

.if the vector group of two transformers is not same n tey r connected in parallel operation then what will happen?

2 3659

PLZ EXPLIN ABOUT CLASS PS CLASS CT .WHY THEY R DESINED AND FOR WHAT PURPOSE?WHY OTHER CT CANT BE USED AS PS CLASS CT? EXPLAIN IN SIMPLE LAUNGAGE IF POSSIBLE PLZ GIVE CIRCIT DIAGRAM?EMAIL-RAJ_SINGH_0376@SIFY.COM

1076

what is meant by motor startup supervision & motor load jam protection ?

4313





what is meant by trip circuit supervision & directional or non directional over current ?

1 4173

what is formula in determining the size of Circuit Breaker for transformer with the following specifications. 7 units of 1600 volts (primary) and 400 volts (secondary). Both Primary and Secondary will have a circuit breaker which is SF6. What should be the Switchgear Main Breaker Size anf the sizes of each brances Circuit Breaker for Primary.

1 3254

How to reduce power factor correction capacitors failure in an industrial environment with vsd and computers usage in the system

2 2644

why plc need seprate earthing?

2 9905

where any change in supply line due to the incipient faults in three phase induction motor

2 2992

what is difference between fuse and breaker?

6 5800

suppose if oil in transformer is not used than what constructional change you will do,for insulation and cooling?

2 4234

why are transformers rated in KVA and not in KW

8 9403

why our power production in multiples of 11.

2 3322

which relay is used on long transmission lines

10 24465

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ABB Electrical Engineering Interview Questions


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