The undesirable property of an electrical insulating material is
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In an alternator running with a balanced zero p.f. lagging load, phase differernc between the resultant armature flux and main field flux is always____? options is 180 degree....why?? explain.
11kv/0.433kv, 2 mva , transformer , for protection and metering how many CT/PT are required?
What is the power ratio between power in Star and Delta circuit?
What is meant by electrical speed?
in the exciter the power is feeded from battry or control or whatever.and we need it in the generators for the stating . do we need it in the shutdown also?i mean the exciter>
what is the standard values(Megger test) of resistances between L&N,L&E and N&E for a system on IEE regulations?
I am having a DG set.The 415 V from Generator is step up to 460 v and then the same is used for Induction furnace. before Step up, I am connecting LT load to my factory use. When Induction furnace is in service from DG, when i try to start a motor, the generator is tripped.Please tell me the reason.
WHY BREAKER ARE USED IN SUBSTATIONS?
A.V.R maintains the voltage of a generator when it is in island mode but when the generator is synchronised with grid it maintenance the P.F,how it happens please any body explain it in detail.
How to decide the size of the capacitor for a single phase induction motor say 2 HP ??
IAM WORKING IN THERMAL POWER PLANT AS A TRAINEE.. I WANT TO IMPROVE MY CARRIER., IF ANYBODY KNOWS ANY COURSES., ANY TESTS, ANY BOOKS ,, ANYTHING PLS HELP ME..
we have 3.5MVA-11/6KV transformer. how can we calculate earth fault current and NGR calculation?