Littelfuse, Inc. EL731 Series – Earth-Leakage, Ground-Fault Relay EL731-02-10

The EL731 series is a microprocessor-based AC/DC sensitive earth-leakage relay designed for low-level ground-fault protection in variable-speed drives and DC circuits. It features a 32-character OLED display, three programmable Form C output contacts, and adjustable trip and alarm settings from 30 to 5,000 mA AC/DC with a trip delay of 0.05 to 2 seconds. The relay accepts RTD/PTC temperature sensor inputs for motor or drive over- and under-temperature protection, and includes a 4-20 mA analog output. It supports Profibus® communication and operates on 120/240 Vac/Vdc or 24/48 Vdc/24 Vac power. The device is conformally coated, measures 48 mm H × 96 mm W × 129 mm D, and is panel, surface, or DIN-rail mountable. It is UL Listed, CSA certified, RCM compliant, and CE marked.