Description The PGN-3000 High-Resistance Grounding Systems are used to ground power systems by inserting a resistor between system neutral and ground to lower the ground-fault current to a predetermined value. Properly sized resistance grounding systems solve two problems of ungrounded systems—transient overvoltages and difficulty locating ground faults. The PGN-3000 Series Resistance Grounding System includes all necessary components to convert or design a resistance grounded system. The PGN-3000 includes a pulsing circuit and an optional PGR-5701 ground-fault relay to provide a method for locating ground faults. It also significantly reduces damage caused by ground-faults on solidly grounded systems. The current limitation eliminates the Arc-Flash Hazards associated with ground faults. The hazards associated with phase-to-phase electrical faults must still be mitigated by using current-limiting fuses and other methods. Applications High-Resistance grounding is typically applied on transformers and generators where safety and up-time are paramount. Since the ground-fault current is typically 5 A or less, there is no Arc-Flash Hazard associated with ground faults and the faulted feeder can remain in operation until it is safe to repair the fault. When ordering, the number of feeders to be monitored should be specified. Features/Benefits • All PGN-3000 Systems include resistor monitoring and groundfault detection (using an additional PGR-5330 relay) • Optional pulsing circuit to locate ground faults (pulses 5 A up from the selected resistor current) • Optional test circuit to simulate ground fault • Continuous rated resistors • Stainless-steel elements prevent corrosion • Available from 240 V– 4160 V and from 5 A– 25 A • Can convert an existing ungrounded or a 3-wire solidly grounded system to a resistance grounded system. For more information on how to convert, see page 52.