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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 4611

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 1870

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

2 3098

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

787

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

3516





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

1 3759

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 2668

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

2 2192

why plc need seprate earthing?

2 8813

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

2 2492

what is difference between fuse and breaker?

6 4996

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

2 3644

why are transformers rated in KVA and not in KW

8 7628

why our power production in multiples of 11.

2 2825

which relay is used on long transmission lines

10 21833

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Un-Answered Questions

1. What do you understand by "Quality"? And how much, do you think "Quality" is important and why? 2. What do you mean by "Analyst"? What is the difference between a "Quality Analyst" and a "Quality Controller"?

846


how to view item configuration of install base?

568


What evidence can you cite that suggests that rheumatic fever is an autoimmune disease?

731


how agile testing is performed and what are the related documents.

557


How do you calculate load bearing capacity of a waffle slab?

1143






what will happen if ac and dc supplies given

820


what parameters we will consider while developing a HPLC method and how we confirm our HPLC method is valid?

2117


What are steam turbine parts usually come into damage?

685


plz send me the aptitude test paper for hpcl.

791


What are the potential risks to non-target orgranisms fo genetically engineered crops?

967


What is the TDS rate in Maharastra, Tamil Nadu, Karnakata,Odisha & West Bengal. What is about Profession Tax.

581


how calculate esi & pf

1026


what the defference from anti virus and spyware and adware also? Please descript?

1039


how you will identify the mapping level bottleneck ? if there is a mapping level bottleneck then how will you try to improve the mapping

655


Why do we have earthing cable in branch cable and shield in the same cable?

1332






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