Littelfuse, Inc. EL731 Series – Earth-Leakage, Ground-Fault Relay EL731-13-10

The EL731 series is a microprocessor-based AC/DC sensitive earth-leakage relay designed for ground-fault protection in variable-speed drives and DC circuits. It features a 32-character OLED display, adjustable trip and alarm settings from 30 to 5,000 mA AC/DC, a trip delay of 0.05 to 2 seconds, and three programmable Form C output contacts. The relay supports optional network communications including EtherNet/IP™, accepts RTD/PTC temperature sensor inputs for motor or drive over- and under-temperature protection, and includes a 4-20 mA analog output. It has a universal power supply of 120/240 Vac/Vdc, 48 Vdc/24 Vac, or 24 Vdc, with pluggable terminals for 24 to 12 AWG wire. The unit measures 48 mm H × 96 mm W × 129 mm D and offers panel, surface, or DIN-rail mounting. It is UL Listed, CSA certified, RCM compliant, and CE marked, with conformal coating and a five-year warranty.