what are the standard values for resistances(Megger testing)
between L&N, L&E and N&E (L=Live,N=Neutral, E=Earth)?
Answer Posted / pswin
You ask the value between L,N and E. So I will assume that you will test for single phase and the test voltage must be 500 v scale and full scale is 100 mega ohm.Minimum value should be 0.5 mega ohm between each conductors. If lower than that value, the cable or wire is not certified to use. For three phase, above answer is acceptable,too.
| Is This Answer Correct ? | 16 Yes | 3 No |
Post New Answer View All Answers
What is the count of hvdc transmission lines in india?
what is the minimum (Common factor) insulatin resistance of the following a, 4mm sq wire b, cable from 50 mm sq to 800mm sq
What is the safety of UPS?
DEAR SIR,I GOT THE CALL LETTER FROM RRB, SECUNDERABD AS A JE-II SO PLEASE PROVIDE ME SOME MODEL QUESTION AND ANSWER PAPERS AND LAST YEAR QUESTION PAPERS
why and where we use early make & late break contacts in protection?
what is V.L.F. testing of power cable? do you know the voltage ratings, like for what rating and size of cable what rating of V.L.F. testing is used?
difference between semiconductor & conductor & insulator?
What is the role of power pack in substation protection system?
Usage of flywheel diode in relays
What are the applications of the electric motors?
How to detect voltage vector shifting in interconnection protection.
what is positive , negative & zero equivalent system resistance
What is I to C?
While testing a ZCT what parameters have to check or measure?
1) Explain why we don't link the two earthing system ht and mv on a pole mounted transformer sub-station.