Why NGR is provided in sub station?

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Why NGR is provided in sub station?..

NGR means Neutral Grounding Resistance.it is used for limit the earth fault current.
generally the NGR earthing used upto the 11kv , Ac supply

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Why NGR is provided in sub station?..

Answer / jithendra

NGR or Neutral Grounding Resistors are used to limit the ground fault current to a safe value in the event of earth fault. A NGR limits the earth fault current to a value which will be sufficient to operate protective relays and prevent unwanted fault damage.

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Why NGR is provided in sub station?..

Answer / patni

Generator /Transformer neutral is grounded through resistor, called NGR (Neutral Grounding Resistor)which is used to limit the ground fault current to a safe value in the event of the earth fault. A NGR limits the earth fault current to a value which will be sufficient to operate protective relays and prevent equipment damage by excessive flow of fault current.

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Why NGR is provided in sub station?..

Answer / arvind kumar

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