Littelfuse PGR-4700-120, PGR-4700 Series, Sensitive Ground-Fault Relay, 120VAC
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The PGR-4700 Sensitive Ground-Fault Relay provides sensitive ground-fault protection without nuisance tripping. It detects very low-level leakage current on large circuits to avoid or significantly reduce equipment damage. The leakages can be identified as they develop and ground faults can be detected before they become critical.
Applications
Ground-fault relays can be used for the protection of critical circuits in panel boards and switch boards, OEM power distribution panels and custom controls. They are typically used in critical load applications with costly downtime and hazards, such as high humidity, water, dust, chemicals, and vibration.
Features/Benefits
• Adjustable trip level settings from 10 mA to 3.0 A
• Advanced harmonic filtering
• Compatible with VFD applications
• Adjustable time delay
• Metering output with PLC interface for continuous monitoring of system
• CT loop monitoring
Specifications
| IEEE Device Numbers | 50G, 50N, 51G, 51N |
| Input Voltage | See ordering information |
| Dimensions |
H 75 mm (3”) W 55 mm (2.2”) D 115 mm (4.5”) |
| Trip Level Settings | 10 mA – 3.0 A |
| Trip Time Delay Settings | 0–1.5 s |
| Contact Operating Mode |
Selectable fail-safe or non-fail-safe (Internal switch) |
| Harmonic Filtering | Standard |
| Test Button | Standard |
| Reset Button | Standard |
| CT Loop Monitoring | Standard |
| Relay Contacts | 2 Form C |
| Communications | Analog Output |
| Conformally Coated | Consult factory |
| Approvals | UL Listed (E183688) |
| Warranty | 5 years |
| Mounting |
DIN, Surface (standard) Panel (with PMA-55 or PMA-60 adapter) |