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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 4678

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 1921

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

2 3185

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

833

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

3687





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

1 3820

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 2732

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

2 2247

why plc need seprate earthing?

2 8964

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

2 2549

what is difference between fuse and breaker?

6 5108

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

2 3711

why are transformers rated in KVA and not in KW

8 7895

why our power production in multiples of 11.

2 2909

which relay is used on long transmission lines

10 22202

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Un-Answered Questions

How to close your application using the Escape key?

680


Is it possible to protect 3phase overload and earth fault of the 3phase system using two CT's.

797


What are the major components of country's trade account?

1720


which of the following procedure would auditor lease likely perform in planning a financial statement audit?

996


As per the Anchor capstan motor specification, full load current is 200A. starting current is 1750 A and acceleration time is less than 8 seconds. Please guide for selection of cable size.

668






1. Assume that passwords are selected from four-character combination of 26 alphabetic characters. Assume that an adversary is able to attempt passwords at a rate of one per second. a. Assuming no feedback to the adversary until each attempt has been completed, what is the expected time to recover the correct password? b. Assuming feedback to the adversary flagging an error as each incorrect character is entered, what is the expected time to discover the correct password?

346


what is the use of static frequency converter and static excitation equipment? and where it is employed? for what?

2217


WHY given much noise PDA dector then VWD Dector

631


what are the areas of improvement required in yourself to achieve your career goals? Describe what you are doing/plan to do to address the areas of improvement

2292


How many types of impurites in Related compound test?

161


An applicant paid excess amount to the Government Office through a demand draft for a particular permission/license instead of actual fees. Later he went to government office and requested to return the previously submitted demand draft. Can he get back the Previously submitted demand draft(which was not adjusted into government account) duly paying he actual fee?

662


where can we find transport return codes

282


How will you do implicit enhancement?

170


why do you think you qualify for a human resources manager position

409


what is meant by re-rolling motor? how it differs from standard motor?

687






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