Neutral Grounding Resistors
Neutral Grounding Resistors are used to protect power transformers, power generators and other associated equipment in your power systems against 50/60 Hz faults (short circuit) and transient phenomena (lightning).
There are three parameters needed to specify the neutral grounding resistor.
1. Rated voltage line to neutral or system voltage
2. Rated fault current.
3. Rated “time on” of the line to neutral voltage not exceeding the allowable temperature rise.