Earth-leakage protection relay PGR-6100 series

insulation1 NO/NCfor electric motors

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. Features 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