Littelfuse, Inc. EL731 Series – Earth-Leakage, Ground-Fault Relay EL731-01-00

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 accepts two current transformers for full frequency coverage from 0 to 6,000 Hz and includes an RTD/PTC input for motor or drive temperature monitoring. The relay features three programmable Form C output contacts, an analog 4-20 mA output, a 32-character OLED display, and surge and harmonic filtering. It operates on 120/240 Vac/Vdc or 24/48 Vdc/24 Vac power and includes DeviceNet™ communication as specified in the EL731-01-X0 model. Mounting options include panel, surface, and DIN-rail with optional adapter. The enclosure measures 48 mm H × 96 mm W × 129 mm D. It is UL Listed, CSA certified, RCM compliant, and CE marked. A 5-year warranty is provided.