Littelfuse, Inc. Monitor - Relay Output 460-MR

The 460-MR is a three-phase voltage monitor for 190-480 V ac, 50/60 Hz motors featuring an external normally open pushbutton for manual reset. It shares the 460 series' auto-sensing voltage range, adjustable 1-30 second trip delay, 1-500 second restart delay, 2-8% adjustable voltage unbalance trip point, and Form C output relay. It operates within -20° to 70 °C, is enclosed in polycarbonate with IP20 and NEMA 1 protection, and mounts on 35 mm DIN-rail or via #6 or #8 screws. Dimensions are 88.9 mm high, 52.9 mm wide, and 59.69 mm deep. It meets UL508, IEC 60947-6-2, and IEC 61000-4-2, -4-4, -4-5, and ANSI/IEEE C62.41 surge standards.