Littelfuse SE-325D, SE-325 Series, Neutral-Grounding-Resistor Monitor, 120VAC/VDC

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The SE-325 Neutral-Grounding-Resistor Monitor is used on resistance-grounded systems up to 25 kV to monitor the integrity of the neutral-to-ground path and to detect ground faults. It measures current and voltage in a transformer or generator neutral-to-ground connection and continuity of the neutral-grounding resistor (NGR). The SE-325 coordinates these three measurements to detect a loose connection, corrosion, ground fault, or NGR failure, and provides one alarm or trip output contact. IEEE Device Numbers Ground Fault (50G/N, 51G/N),Overvoltage (59N), Lockout Relay (86),Checking Relay (3) Input Voltage See ordering information Dimensions H 150 mm (5.9"); W 109 mm (4.3");D 100 mm (4.0") GF Trip Level Settings 0.5-4.0 A GF Trip Time Settings 0.1-2.0 s RF Trip-Level Settings 20-400 Vac (≤5 kV systems)100-2,000 Vac (>5 kV systems) Contact Operating Mode Selectable fail-safe or non-fail-safe Reset Button Standard feature Output Contacts Form A Approvals CSA certified, UL Listed (E340889),C-Tick (Australian) Conformally coated Standard feature Warranty 5 years Mounting Surface Show more