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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 5918

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 2946

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

2 4617

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

1535

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

5063

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

1 4856

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 3921

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

2 3545

why plc need seprate earthing?

2 11020

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

2 3735

what is difference between fuse and breaker?

6 7529

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

2 4970

why are transformers rated in KVA and not in KW

8 11645

why our power production in multiples of 11.

2 4166

which relay is used on long transmission lines

10 28586

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ABB Electrical Engineering Interview Questions


Un-Answered Questions

What is notification in iOS?

385


write a query to retrieve the last day of next month in oracle.

394


Explain how to convert json text to a javascript object?

1


What is the difference RDBMS and Graph Database?

511


Name some ppc (pay-per-click) tools?

92






How to add more than 8 tabs in MS CRM ?

259


Why is schottky diode called hot-carrier diode?

467


Explain working of a fourneyron turbine?

514


What is online transaction processing (oltp)?

485


Can you edit an apex trigger/ apex class in production environment?

184


earth also having a gravitational force (magnetic field of north and south)but it attracts any object compare to this theartifical magnetic cant perform same as earth why?

1249


What are the ways to do a “table lookup” in sas?

465


if New plant is arrived what are the pre checks we will perform from Controlling end?

78


Explain the difference between classic mode authentication and claims-based authentication?

324


how many material required for brickbat water proofing of toilets.

1432