Littelfuse, Inc. Industrial Relays 202-RP

The 202-RP is a three-phase voltage and phase monitor designed to trip on reverse-phase only for 190-480 V ac, 50/60 Hz systems. It features adjustable trip and restart delays of 2-300 seconds, a SPDT output relay rated at 10 A at 240 V ac, and advanced LED diagnostics with five distinct light patterns to indicate fault conditions. The device automatically selects between 200 V and 400 V ranges, monitors voltage unbalance, high/low voltage, and phase sequence, and resets after fault conditions normalize. It mounts via a 1/4-inch socket head cap screw, has dimensions of 63.5 mm × 63.5 mm × 35.56 mm, operates from -40° to 70 °C, and meets UL 508 standards with a 480 VA pilot duty rating. The output relay deactivates after a 2-second delay for phase faults and reactivates after a user-defined restart delay or manual reset.