Littelfuse SE-325D, SE-325 Series, Neutral-Grounding-Resistor Monitor, 120VAC/VDC
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$3,157.65
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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 |