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HOW DISTANCE PROTECTION IS DONE IN EHV TRANSMISSION LINES? WHAT IS THE BASIC TECHNIQ OR FUNDA USED BEHIND THIS ? SPECIALLY EXPLAIN?IMPEDANCE METHOD.
ABB,
2 7293dear all, in motor operation , motor is of 100 hp and bimetal relay setting is 130 amp, if relay is getting tripped on 120 amp balance current what can be the reason? Relay is newly replaced. I dont know but is there any frequency effect in thit case? Can frequency variation affect bimetal relay operation?
1 3711WHEN 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?
ABB,
1 3997.if the vector group of two transformers is not same n tey r connected in parallel operation then what will happen?
ABB,
2 6211PLZ 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
ABB,
2271what is meant by trip circuit supervision & directional or non directional over current ?
ABB,
1 5752if the 10 hp motor name plate indicates rated current as 13.6 amp the what will be the thermal relay setting? Why? And in how much time relay will trip at the set value?
2 5790Post New Electrical Engineering Questions
what is the solution for meger test failed the MV cable?
What do you understand by avr?
in cvt,there are two windings,1a,1n and 2a,2n.in my one project i use only one winding i.e.1a,1n. the other winding is not in use, so i connect it in open delta and want to close it by ibsertibg thermal resistor. the output of cvt is 132kv/115/sqrt3. plesae tell me exact value of resistor, so i may close it to avoid the resonance phenomenin. send me answer on this email adress please. aetcon-po@aetcon.com
why normally Generator rating are between 11Kv to 22Kv?
PLZ sent the previous year question paper for GET in NHPC on my EMail id ppshanker@gmail.com
H.t motor 6600 volt to same motor lt supply 440volt supply applyed to h.t motor to effect....
which network topology offers the greatest level of tolerance?
What is nichols chart?
What is an ac motor?
How to calculate cable size in HT AND LT
the site measured knee point voltage of protection class CTs should be greater than rated knee point voltage? what about meetering class CTs. Should it be below the rated knee point voltage?
2. What are the parameters of EHT sub-station?
Define step response?
Why we are use dol starter up to 10 hp
what is meant by re-rolling motor? how it differs from standard motor?
