Resistance Grounded Systems (HRG/LRG)
Neutral Grounding Resistors (NGRs) are used to limit the maximum ground-fault current. Restriction of fault current lowers hazards and reduces damage done to equipment. High Resistance Grounding (HRG) systems are often used on industrial and critical power applications to maintain system uptime during a first ground fault. HRG systems are also used in tripping applications to help control touch potential on portable loads and improve personnel safety.
Bender Low Resistance Grounding (LRG) solutions reduce the current to 100 A and higher. Customers requiring higher ground-fault current for older, less sensitive ground-fault relays can retrofit a Bender LRG into the application.
Advanced HRG and LRG packages include neutral grounding resistor monitors to measure neutral voltage, ground-fault current, continuity of the NGR connection to ground, and may also include phase voltage indication and feeder level fault location.