Crouzet Monitor - Relay Output LWRA440A

The LWRA440A is a three-phase phase control relay for monitoring phase sequence and loss of any phase, even when induced voltage reaches 95% of nominal. It features a SPDT 10 A relay output with AgCdO contacts, rated for 250 VAC/DC switching and 220 VA resistive load, and operates on 3 x 440 VAC at 60 Hz. The device has a top-mounted potentiometer for adjusting phase asymmetry alarm threshold between 5% and 15%, with an initial response time of 0.1 seconds at 5% asymmetry and 1 second at 15%. An LED indicates the relay status. The relay has a mechanical life of 30 million operations and an electrical life of 200,000 operations at rated load. It is mounted as an 11-pin plug-in unit and operates from -10°C to +60°C. UL listed and CSA recognized for the 220 VAC version only.