Answer Posted / naeem
Acceptable IR value for HT cable with Megger at 5KV is 1000Mohm and for LT cable with Megger at 500V is 2Mohm and If the obtained value is less than these then cable may be suspected, we can energise the cable even with low values and it will stand but with full load in high temperature any time cable can create problem , so the standard is 1000Mohm for HT and 2Mohm for LT cable.
Is This Answer Correct ? | 9 Yes | 2 No |
Post New Answer View All Answers
with 3 phase board on a 63 amp rcd is it ok to have 6 electrical showers 2 on each phase and what problems could happen
How time response of the system is divided?
Explain the iniluencc of short circuit ratio on the pert'orniancc of synchronous machine.
If we are given a 10 amp cable type and asked to calculate the number of cores used and the thickness of the cable, how do we do it?? please help...urgent!! i hope the question is clear enough!!
What is Traction? 1KVA Alternator, How much urrent taken?
When we use 3 terminal resistor?
The shot circuit in any winding of transformer result? Explain
What is force on parallel conductors ?
A commercial Building is designed with 14th floor levels with indoor substation of three phase transformer with rated capacity of 1000 Kva.The transformer delivered 65% of its rated capacity at 0.67 power factor lagging.Because of low power factor, the power customer was penalized and certain cost was charged accordingly based on every point percentage lower than 85%.This situation may repeatedly happen on the succeding energy bills of power customer.The power customer is desired to improve its historical power factor of 0.67 lagging and no further penalty be impose by the local power company on the next bill. Q: Identify the appropriate solution you want to offer to Client?.Justify SCIENTIFICALLY and MATHEMATICALLY the principles behind the solution.
what is ATS & RING MAIN UNIT in Distribution System?And its Function.
what is the difference between pvc & fiber glass cables
How can I calculate ISF of current transformer?
Explain Energy and Power signals?
A ii kv 1200 A Breaker combination fixed in a cubicle. How many ampere Fuse is required? If fuse is not using, Why?
what is power factor ? how we can calculate the low power factor and amount of capacitor for improve that low factor ?