Earthing & Grounding க்கும் உள்ள வேறுபாடுகள் | Earth value | tech for all needs | NGR | NGT

Protection against transient over voltages.
Measure the fault current through the NCT (Neutral grounding transformers)
Main ultimate aim of the NGR is to limit the fault current. It just works as a fault current regulator. The resistance always opposes the flow of electrons (current). Upon flow of heavy fault current from the winding, the conductor may get damage because the protection relays need minimum time to isolate the power system. For the short period, the NGR limits sudden flow of fault current from the winding and converts the fault current in terms of heat energy. NGR uses the fault current.
Reduce exposure to arc faults caused by a phase-to-ground fault
May continue to run with a ground fault (alarming system)
Reduced energy available to arc flash
Provide adequate tripping levels for selective ground-fault detection and coordination
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[@ambethambeth4857]

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