Littelfuse, Inc. PGR-4300 Series – Generator Ground-Fault Relay PGR-4300-12

The PGR-4300-12 is a Generator Ground-Fault Relay designed to detect ground-fault conditions on generators without the need for current transformers, simplifying installation. It operates on a control power of 12 Vdc and is compatible with both three- and four-pole transfer switches. The relay features adjustable trip settings ranging from 100 to 1200 A and an adjustable time delay of 0 to 1.0 seconds, allowing for tailored protection and system coordination. This relay includes Form C output contacts for alarming or tripping purposes and provides an analog output of 0-1 mA for connection to optional meters or control systems. Additionally, it monitors the neutral-to-ground path for continuity, ensuring system integrity. The PGR-4300-12 is suitable for applications where space constraints prevent the installation of current transformers. It is UL Listed and comes with a 5-year warranty.