COMBINED OVERCURRENT AND EARTH FAULT RELAY .
COMBINED OVERCURRENT AND EARTH FAULT RELAY - Didactic equipment:
module with insulated panel, combined over-current & earth fault relay with programmable time-current curves suitable for protection of power distribution systems with insulated, resistance earthed or compensated neutral It must be provided with three phase-fault elements, three earth fault elements, time current curves selectable according to IEC/IEEE standards, a breaker failure protection, a trip circuit breaker control via serial port, a blocking output and blocking input for pilot wire selectivity coordination, a time tagged multiple event recording, oscillographic wave form capture, modbus RTU / IEC870-5-103 communication Protocols, display LCD 16 (2x8) characters, optional expansion input/output modules, rated input current selectable 1A or 5A, 50/60 Hz. 3rd harmonic filter on the neutral input current. .
4 mm. safety terminals and 2 mm. terminals included on the front panel for the electrical connection, Electrical Power Engineering Laboratory