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Neutral Grounding Resistor (NGR) - Hill Tech Sales The NGR will limit fault currents that flow through the neutral star point of a transformer or generator, to a safe reasonable predetermined value during a fault event
Neutral Grounding Resistors (NGR) Explained: What They Are, How They . . . How Does a Neutral Grounding Resistor Work? When a single line-to-ground fault occurs, the NGR provides a resistance path for the fault current By doing so, it restricts the current magnitude, reduces damage to equipment, and allows system operators to detect and clear the fault safely