Protective relay
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.
DTOC relayDefinite time over-current relayDefinite time overcurrent relayDifferential relayDirectional relayDistance relayEOCRIDMT relayIOC relayITOC relayImpedance relayInstantaneous over-current relayInstantaneous overcurrent relayInverse-time over-current relayInverse definite minimum timeInverse definite minimum time relayInverse time over current relayOC relayOver-current relayOvercurrent relayOvervoltage relay
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2011 Chile blackoutANSI device numbersAnalog computerArc flashArcing hornsAurora Generator TestBrushed DC electric motorCircuit breakerComtradeCurrent transformerDMTDTOC relayDefinite time over-current relayDefinite time overcurrent relayDifferential relayDirectional relayDistance relayEOCRElectric power systemElectric power transmissionFuse (electrical)Geomagnetically induced currentGlossary of electrical and electronics engineeringIDMT relayIOC relayITOC relayImpedance relayIndex of electrical engineering articlesInstantaneous over-current relayInstantaneous overcurrent relayInverse-time over-current relayInverse definite minimum timeInverse definite minimum time relayInverse time over current relayKarachi Nuclear Power ComplexNetwork analyzer (AC power)Northeast blackout of 1965Numerical relayOC relay
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Protective relay
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.
has abstract
In electrical engineering, a p ...... ult conditions that may occur.
@en
Relai proteksi adalah relai ya ...... nfaatkan teknologi elektronik.
@in
Reläskydd har till uppgift att ...... relä/magnet och brytare ingår.
@sv
في الهندسة الكهربائية، المرحِّ ...... َآي إي سي 60255-3، وآي إيه سي.
@ar
保護継電器（ほごけいでんき）とは、継電器（リレー）の一種で電流や電圧の急激な変化から電気回路を保護するための装置。保護リレーとも呼ばれる。
@ja
在电气工程中，保护继电器是设计用来當检测到故障时，跳脫断路器達到保護特定設施的装置，特定設施可以是發電機、變壓器、輸電線路等等。
@zh
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In electrical engineering, a p ...... ult conditions that may occur.
@en
Relai proteksi adalah relai ya ...... apat diatur sesuai keperluan.
@in
Reläskydd har till uppgift att ...... relä/magnet och brytare ingår.
@sv
في الهندسة الكهربائية، المرحِّ ...... َآي إي سي 60255-3، وآي إيه سي.
@ar
保護継電器（ほごけいでんき）とは、継電器（リレー）の一種で電流や電圧の急激な変化から電気回路を保護するための装置。保護リレーとも呼ばれる。
@ja
在电气工程中，保护继电器是设计用来當检测到故障时，跳脫断路器達到保護特定設施的装置，特定設施可以是發電機、變壓器、輸電線路等等。
@zh
label
Protective relay
@en
Relai proteksi
@in
Reläskydd
@sv
المرحل الواقي
@ar
保护继电器
@zh
保護継電器
@ja