Littelfuse, Inc. Protection Relays & Systems EL500-00-10

The EL500-00-10 is a microprocessor-based earth leakage relay designed to detect and isolate earth fault currents in power systems. It operates with an auxiliary supply range of 110 to 240 Vac/Vdc and monitors leakage currents from 30 mA to 30 A with adjustable trip times from 0 to 10 seconds. The device features manual reset, a changeover (Form C) and a normally open (Form A) relay output with a contact rating of 5 A at 240 Vac or 30 Vdc, and includes LED indicators for power, trip status, CT open, and leakage current levels. It mounts on base or DIN rail and measures 36 x 90 x 66.2 mm. The relay meets IEC 60947-2 Appendix M for Class A True RMS measurement, and complies with CE, RoHS, and relevant EU directives. It is certified for use with core-balance current transformers and operates within -15 °C to +60 °C.