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Why is it required. What is neutral grounding resistor and how is its v. Details About Powerohm P17207 Neutral Grounding Resistor 69 4ohms 5 Amps Nop Island Life Operating Your Microgrid In Island Mode High Resistance Neutral Grounding Resistor Mingrui Neutral earthing resistor systems protect power transformers and generators from damaging fault currents. Why neutral grounding resistor . Earthing of the neutral limits the ground fault current to a high level typically 50 amps or more in order to operate protective fault clearing relays and current transformers. Neutral grounding resistors are used to protect power transformers power generators and other associated equipment in your power systems against 5060 hz faults short circuit and transient phenomena lightning. Limiting the possible current that can flow in such an event not only reduces damage to equi...