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About: Protective relay     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatRelaySwitches, within Data Space : dbpedia.org associated with source document(s)

Type: Thingyago:Artifact100021939yago:Control103096960yago:Device103183080yago:Gear103431243yago:Instrumentality103575240yago:Mechanism103738472yago:Object100002684yago:PhysicalEntity100001930deviceyago:Switch104372370yago:Transmission104472243yago:Whole100003553yago:WikicatElectricPowerTransmissionSystemsyago:WikicatRelaySwitches New Facet based on Instances of this Class

In electrical engineering, a protective relay is a relay device designed to trip a circuit breaker when a fault is detected. The first protective relays were electromagnetic devices, relying on coils operating on moving parts to provide detection of abnormal operating conditions such as over-current, overvoltage, reverse power flow, over-frequency, and under-frequency. Based on the end application and applicable legislation, various standards such as ANSI C37.90, IEC255-4, IEC60255-3, and IAC govern the response time of the relay to the fault conditions that may occur.