Crouzet Monitor - Relay Output PWRA440A

The PWRA440A is a three-phase phase control relay with a 10 A SPDT relay output, designed to monitor phase sequence and detect loss of any phase, including when voltage is reinjected at up to 95% of nominal. It operates from 3 × 415/440 VAC, 60 Hz, with a power consumption of 3 VA at 220 V. The relay has AgCdO contacts rated for 250 VAC/DC, with a maximum switching power of 220 VA and 80 W. The device is mounted via an 8-pin plug-in connector and has an operating temperature range of −10°C to +60°C. It meets UL listing and CSA recognition for the 220 VAC version only, with a mechanical life of 30 × 10⁶ operations and an electrical life of 2 × 10⁵ operations at 220 VA resistive load. A top-mounted potentiometer adjusts the asymmetry alarm threshold between 5% and 15%.