About: Protective relay     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:Mechanism103738472, within Data Space : dbpedia.org associated with source document(s)
QRcode icon
http://dbpedia.org/describe/?url=http%3A%2F%2Fdbpedia.org%2Fresource%2FProtective_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, over-voltage, 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.

AttributesValues
rdf:type
rdfs:label
  • Protective relay
  • 保護継電器
  • Reläskydd
  • 保护继电器
rdfs:comment
  • 保護継電器(ほごけいでんき)とは、継電器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。
  • Reläskydd har till uppgift att skydda elkraftsystemet, och i detta ingående utrustning och anläggningar, från skadliga felströmmar. Reläskyddet är en viktig del av det s.k. felbortkopplingssystemet, där även mättransformatorer, likströmssystem, utlösningsrelä/magnet och brytare ingår.
  • 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。
  • 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, over-voltage, 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.
foaf:depiction
  • External Image
foaf:isPrimaryTopicOf
thumbnail
dct:subject
Wikipage page ID
Wikipage revision ID
Link from a Wikipage to another Wikipage
Link from a Wikipage to an external page
sameAs
dbp:wikiPageUsesTemplate
has abstract
  • 保護継電器(ほごけいでんき)とは、継電器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。
  • 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, over-voltage, reverse power flow, over-frequency, and under-frequency. Microprocessor-based digital protection relays now emulate the original devices, as well as providing types of protection and supervision impractical with electromechanical relays. Electromechanical relays provide only rudimentary indication of the location and origin of a fault. In many cases a single microprocessor relay provides functions that would take two or more electromechanical devices. By combining several functions in one case, numerical relays also save capital cost and maintenance cost over electromechanical relays. However, due to their very long life span, tens of thousands of these "silent sentinels" are still protecting transmission lines and electrical apparatus all over the world. Important transmission lines and generators have cubicles dedicated to protection, with many individual electromechanical devices, or one or two microprocessor relays. The theory and application of these protective devices is an important part of the education of a power engineer who specializes in power system protection. The need to act quickly to protect circuits and equipment often requires protective relays to respond and trip a breaker within a few thousandths of a second. In some instances these clearance times are prescribed in legislation or operating rules. A maintenance or testing program is used to determine the performance and availability of protection systems. 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.
  • Reläskydd har till uppgift att skydda elkraftsystemet, och i detta ingående utrustning och anläggningar, från skadliga felströmmar. Reläskyddet är en viktig del av det s.k. felbortkopplingssystemet, där även mättransformatorer, likströmssystem, utlösningsrelä/magnet och brytare ingår.
  • 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。
prov:wasDerivedFrom
page length (characters) of wiki page
is foaf:primaryTopic of
is Link from a Wikipage to another Wikipage of
Faceted Search & Find service v1.17_git51 as of Sep 16 2020


Alternative Linked Data Documents: PivotViewer | iSPARQL | ODE     Content Formats:       RDF       ODATA       Microdata      About   
This material is Open Knowledge   W3C Semantic Web Technology [RDF Data] Valid XHTML + RDFa
OpenLink Virtuoso version 08.03.3319 as of Dec 29 2020, on Linux (x86_64-centos_6-linux-glibc2.12), Single-Server Edition (61 GB total memory)
Data on this page belongs to its respective rights holders.
Virtuoso Faceted Browser Copyright © 2009-2021 OpenLink Software