Littelfuse, Inc. EL731 Series – Earth-Leakage, Ground-Fault Relay EL731-12-10

The EL731 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, adjustable trip and alarm settings from 30 to 5,000 mA, selectable trip delays of 0.05 to 2 seconds, and three programmable Form C output contacts. The relay supports universal power supplies of 120/240 Vac/Vdc, 48 Vdc/24 Vac, or 24 Vdc, and includes an analog 4-20 mA output and RTD/PTC input for temperature monitoring. It offers optional network communications via Profibus® and complies with UL Listed (E340889), CSA, RCM, and CE standards. The unit mounts on panels, surfaces, or DIN-rail, with dimensions of 48 mm H × 96 mm W × 129 mm D.