Littelfuse, Inc. EL731 Series – Earth-Leakage, Ground-Fault Relay EL731-03-10

The EL731 series is a microprocessor-based AC/DC sensitive earth-leakage relay for ground-fault protection in AC or DC systems, suitable for variable-speed drives and DC circuits. It has a panel, surface, or DIN-rail mount with dimensions of 48 mm H × 96 mm W × 129 mm D. The EL731-03-10 variant operates on 120/240 Vac/Vdc with EtherNet/IP™ communication. It supports adjustable trip and alarm settings from 30 to 5,000 mA, trip delays from 0.05 to 2 seconds, three programmable Form C output contacts, an analog 4-20 mA output, and RTD/PTC temperature monitoring. It includes harmonic filtering, CT-loop monitoring, and a 32-character OLED display. Conformal coating is standard. The relay meets UL Listed (E340889), CSA, RCM, and CE approvals and has a five-year warranty.