Littelfuse, Inc. PGR-4300 Series – Generator Ground-Fault Relay PGR-4300-120

The PGR-4300-120 is a generator ground-fault relay designed to detect ground faults without current transformers, simplifying installation in space-constrained applications. It operates on 120 V ac, features adjustable ground-fault pickup from 100 to 1200 A and time delay from 0 to 1.0 s, and provides Form C output contacts and a 0-1 mA analog output for metering or control systems. The relay monitors neutral-to-ground continuity and includes a test and reset button for local operation. It is mounted on DIN rail or surface and complies with IEEE 50G/N and 51G/N device numbers. Dimensions are 75 mm height, 55 mm width, and 115 mm depth. The unit is UL Listed (E183688) and has a five-year warranty.