Neutral Grounding Resistors
The main purpose of a Neutral Grounding Resistor (NGR) is to limit the fault current present in a single line to ground fault. Limiting the possible current that can flow in such an event not only reduces damage to equipment but also helps safeguard personnel in the vicinity. Depending on the design of the resistor, this current value can be either high or low, continuous or of a predetermined duration. The resistor’s designed maximum current allows relays and protection settings to be easily determined and enacted, creating a safe work environment.
