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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 5048

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 2233

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

2 3600

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

1052

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

4269





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

1 4120

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 3190

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

2 2588

why plc need seprate earthing?

2 9799

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

2 2923

what is difference between fuse and breaker?

6 5690

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

2 4167

why are transformers rated in KVA and not in KW

8 9219

why our power production in multiples of 11.

2 3272

which relay is used on long transmission lines

10 24250

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Un-Answered Questions

Explain routing in zend framework?

21


please give me all the Alarm .Trip ,Safety Relays & Conditions of Diesel-generators mail me on ashokbabunhce@gmail.com

924


Explain if gravity only attracts mass and if light does not have mass why does it appear to bend when passing a planet?

13


I have source having single column C1 RAM KRISHNA I have to load that data in to one target . that target contain two columns C1 and C2 I want the out put like C1 C2 RAM KRISHNA that means in 1st column RAM and Second column Krishna ok by using informatica only . single space in between ram krishna in soucre column ok?

2184


What are the different forms of communication provided by the android applications?

47






What are the regulatory commitments in markets like USA, Canada, Europe, Brazil, South Africa and Japan

1326


There are 100 datafiles, numbered from 1 to 100. File number 10 is deleted and it has 500 MB of data. The database is working in archive log mode. How can be the database recovered ? While doing recovery the archive logs applied are from nos 1 to 100, but 50 gets corrupted. What do we do? Can we proceed further? If so how?

1161


What is database in excel?

1


Write a custom function in R?

1


How can you retrieve a particular number of records from a table?

60


What Is Boot.proerties File In Weblogic Server ?

64


How are variables mapped across to the various memories by the c compiler?

79


• Which is the latest one?

1061


What is new keyword in javascript?

26


What is the use of 'object' keyword in Scala? How to create Singleton objects in Scala?

1