Littelfuse® PLR240A Electromechanical Voltage Sensing Relay, 190 to 270 VAC, 5 A, 8 Pins, SPDT Contact Configuration

The PLR series provides a cost effective means of preventing 3-phase motor startup during adverse voltage conditions. Proper A-B-C sequence must occur in order for the PLR output contacts to energize. In addition, the relay will not energize when an under voltage or phase loss condition is present. The PLR protects a motor against under voltage operation. The adjustment knob sets the under voltage trip point.