Littelfuse, Inc. Industrial Relays PLMU11

The PLMU11 is a three-phase voltage monitoring relay for motor and load protection, detecting undervoltage, overvoltage, voltage unbalance, phase loss, and phase reversal. It features an 8-pin octal plug-in package measuring 77.0 mm height, 60.7 mm width, and 45.2 mm depth. The relay operates on 200 to 480 VAC, automatically selecting voltage ranges, with a 10A SPDT output contact rated for 277 VAC. A 0.6s random start delay precedes monitoring; trip delays are adjustable from 0.25 to 30 seconds, with automatic reset after fault correction. LED indicators show operational status and fault types. It complies with ASME A17.1 Rule 210.6, NEMA MG1 14:30/14:35, and IEEE C62.41-1991 Level B. Isolation voltage is 2500 V RMS, operating temperature range is -40°C to 60°C, and weight is 244 g.