Interested to Buy Any Domain ? << Click Here >> for more details...
why we are testing cables with DC supply not with AC supply?
- 9 Answers
- 30992 Views
- Aurobindo, DEWA, L&T, I also Faced
- E-Mail Answers
Answer Posted / malik
Power cables testing is 2 types IR and Hipot.
1. megger normally D.C, we required the resistance value of
the insulation. AC megger till not to use.
2. Hi pot test, we apply the AC voltage low Frequency(VLF),
we measure the leakage current value. this kit we cannot
measure for the resistance value if the insulation.
so we use AC supply and DC supply for the different
application.
| Is This Answer Correct ? | 3 Yes | 8 No |
Post New Answer View All Answers
wheather the size of windings in motor and generator are the same
what is metering cum synchronizing panel and how it is used?
How I calculate the ELCB for circuit breakers?
what is feeder bay?
How grounding is different than earthings?
How many kw will suply from one db
what is draiv work
WHAT IS AIR GAP VALUE IN MM FOR A 11KV BUSHING OF 11KV/440V DISTRIBUTION TRANSFORMER. AND AIR GAP VALUE OF 25 KV BUSHING OF AT TRANSFORMER OF 25 KV TRACTION. WHAT IS THE CALCULATION FOR THE AIR GAP PERMITTED FOR BUSHINGS AT DIFFERENT VOLTAGES.
why did youi choose this career?
I have a small system with two motors that are running on 380 vac, 60 hz. These motors are expensive and I usally get them from Brazil. I am adding another motor to the system, but I want to purchase a 480 vac, 60 hz motor to use. It will be on a VFD that is rated fro 380 thru 480. Is this posible and will I have to use a larger motor and derate it?
what are the dimensions for 200 kva transformer plinth (plateform),in which pcc m20 is used..
internally connection of photvoltic module
IF 8255 CONTROL WORD IS 94H,Tell the chip port work mode ?
how braking & making capacity of circuit breaker are calculated?
Sir, I have applied for the of Jr.engineer(Electrical & Electronics) & ASST. LOCO PILOT at ALL RRB BOARDS. please send me all RRB Boards solved papers in the year of 2001 tO till date. i requested send me the papers to my id as soon as possible (jet_0991@yahoo.com). (This is very urgent) Thank You,
