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 7464dear 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 3850WHEN 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 4140.if the vector group of two transformers is not same n tey r connected in parallel operation then what will happen?
ABB,
2 6443PLZ 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,
1 2359what is meant by trip circuit supervision & directional or non directional over current ?
ABB,
1 5885if 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 5962Post New Electrical Engineering Questions
What types of CMOS memories have you designed? What were their size? Speed? Configuration Process technology?
please send me the previous year's question papers of jindal GET exams
when will be the iocl interview results i faced interview on 8th september 2008 iam from electrical branch i faced interview for the post of electrical engineer??????????????????????//
What the main causes of transient interruptions on Over-Head Distribution Lines?
How to do cable earhing? whether by grounding Armour to ground or by running extra G.I wire along with cable? which one is preferred mostly amoung them? If the second one is more preferable how many GI wires to be run along with cable (1 or 2)?
Draw the vector diagram and condition for the following: 1) Dyn1 2) Ynd0 3) YnYn0
What products have you designed which have entered high volume production?
Is it possible to measure correct value of earth resistance & cable insulation ristance with out disconncting earth lead & both sides of cable ends? If not, any other method to measure ER & CIR with out disconneting from the system.
Draw the vector diagramme for Asynchronous Induction Generator at noload,half load and fullload.
WHAT IS THE MEANING OF BALANCED / UNBALANCED IN STABILIZER TYPES.
Sir, I have applied for the of Assistant.engineer of NPDCL. please send me all AP TRANSCO AND JENCO solved papers of previous exams . I requested send me the papers to my id as soon as possible (rajanikanth_peddi@yahoo.co.in) (This is very urgent) Thank You,
Draw a block diagramof Three UPS systems connected in Parallel mode?
please send the IS strandard for electrical to sakthi_murugan86@yahoo.co.in
please send me previous year questions of jspl through which i could prepare myself for the test.
As i want some model question paper in basic computer science and history please send me immediately sir