en2015-08-18 17:29 PM CESThttp://inspire.ec.europa.eu/codelist/ElectricityAppurtenanceTypeValue/relayControl:1http://inspire.ec.europa.eu/codelist/ElectricityAppurtenanceTypeValue/relayControlRelay control.Protective relay systems detect and isolate faults. Time-delayed phase and ground relays are coordinated with fuses and reclosers further out on the circuit. They are instantaneous units with inverse TCCs to coordinate with fuses and reclosers further downstream. Relays are usually set to trip feeder breakers and protect the fuse in the event of temporary faults beyond the fuse.