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Littelfuse PGR-6100 Ground-Fault and Insulation Relay Provides Exceptional Motor Protection
The PGR-6100 monitor combines the features of a ground-fault protection relay and insulation monitor into one unit. The monitor can detect a motor ground fault whether the motor is running (online mode) or stopped (offline mode). It protects against ground faults by monitoring insulation resistance when the motor is de-energized and by monitoring ground-fault current when the motor is energized. The PGR-6100 features two separate analog outputs for optional current and ohm meters and two separate alarm relays. The unit operates on one- or three-phase solidly grounded, resistance grounded, and ungrounded systems up to 6 kV. Selectable fail-safe or non-fail safe operating modes allow connections to shunt or undervoltage breaker coils. The PGR-6100 is unique in that it has predictive as well as protective capabilities.
- Adjustable GF pickup (10 mA–3 A)
- Adjustable insulation pickup (250 kΩ–2 MΩ)
- Adjustable time delay (50 ms–1.0 s)
- Output contacts
- Two analog outputs (0–1 mA)
- CT-loop monitoring
- Selectable contact operating mode
- Trip setting provides a wide range of low-level protection and system coordination
- Customizable insulation resistance setpoints for maximum protection
- Adjustable trip delay for quick protection and system coordination
- Two form C output contacts for ground fault and insulation-resistance fault
- Indicate insulation resistance and ground-fault current
- Alarms when CT is not connected
- Selectable fail-safe or non-fail-safe operating modes allows connection to shunt or undervoltage breaker coil
PGR-6100 Parts
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PGR-6100 Applications
- For basic motor protection including ground-fault protection and insulation monitoring
