Littelfuse, Inc. SE-325 Series – Neutral-Grounding-Resistor Monitor SE-325ENT

The SE-325 series is a neutral-grounding-resistor monitor designed for resistance-grounded systems up to 25 kV, monitoring the integrity of the neutral-to-ground path and detecting ground faults. It features adjustable ground-fault trip levels from 0.5 to 4.0 A, adjustable trip delays from 0.1 to 2.0 s, a Form A output contact, and selectable fail-safe or non-fail-safe operating modes. The device is conformally coated, includes a standard reset button, and is CSA certified and UL Listed (E340889). It has dimensions of 150 mm high, 109 mm wide, and 100 mm deep. The SE-325ENT variant is not explicitly listed, but the series supports 120 Vac, 120 Vac/Vdc, and 240 Vac input voltages, with the CT200 and ER Series required for interface.