Answer / devnand

value of the neutral earth voltage (0)

Answer / david

The neutral earth voltage is theoretically zero, so answer 1 is qualified correctly. The story is more complex however.
Under fault conditions however, this forced condition can create massive fault current.
There are instances where the neutral-earth voltage on heavily loaded HV star distribution systems will have a resistor fitted between neutral and earth (NER) to limit fault current and provide a safety net without resorting to major line upgrades. A typical 11KV NER will be around 4 to 7 ohms, and will need to dissipate up to 1 Megawatt, and neutral earth voltage can rise to about 6KV.

Answer / falak sher

it would be 40 to 50 volt ...so always we ground neutral separatly,we also earth the body of transformer separatly, and we will also earth the light arrestor separtly

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