Littelfuse SE-325DSN

The SE-325 Neutral-Grounding-Resistor Monitor is designed for use in resistance-grounded systems with voltages up to 25 kV. Its primary role is to monitor the integrity of the neutral-to-ground connection while detecting ground faults effectively. This device measures both current and voltage within a transformer or generator's neutral-to-ground connection, as well as the continuity of the neutral-grounding resistor (NGR). By coordinating these measurements, the SE-325 identifies issues such as loose connections, corrosion, ground faults, or failures in the NGR.

With one alarm or trip output contact, this monitor provides essential feedback on system status, ensuring prompt response to potential electrical hazards. The SE-325 also features a supply voltage of 120 VAC and 120 VDC, along with approvals from CSA, indicating its compliance with industry standards.