Answer / sks

TOLERENCE LIMIT = LESS THAN 01 VOLT, BECAUSE AT TRANSROEMER
OR GENERATOR NEWTRAL IS CONNECTED WITH EARTH, IF EARTH IS
DRY, STRIP OR WIRE IS CORRODED AT JOINTS THAN VOLTAGE
POSSIBLE TO BE MORE.

Answer / nikunj

I Think it should be less than or equal to 5 volt between
earth and neutral. if it greater than 5 your earthing is
not good and you have to add water in earthing pits for
making earthing strong.

Answer / saleem khan

Clearance between neutral and earth should not be less
than 20mm.

Answer / dolly prasad

2V IS THE TOLERANCE LIMIT BETWEEN NEUTRAL AND EARTH.

Answer / s c budhiraja

voltage between neutral and earth should not be more than
2 volts

Answer / mukund

They Should be at same potential, Hence no tolarance is
required

Answer / nilmadhab karmakar

i think it is 230V DC.

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Three set (each phase contain 2 cable of 400 mmsq CU XLPE AWA) of single core cables are connected to 11 KV motor of 14 MW & the switch gear supplay is taken from 11kv feeder & this supplay taken from 275 KV substation. Problem is one pair cable(L3- 2 cable ) getting very hot & gland melted and damaged in switch gear side. the other two cable haven't any more hot(ambient temp only & L3 haveing 95- 100 Degree C. The same problem happened in 275 KV substation switch gear side also where the supply taken for 11 kv switch gear. But here L2 phese cable had problem. Why it is happening like this?. The cable having temperature different at different location from gland side inthe case of 11KV feeder of 275 kv substation. why ?

2 Answers  

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3 Answers