BR8201521A - Rele de terra de razao - Google Patents

Rele de terra de razao

Info

Publication number
BR8201521A
BR8201521A BR8201521A BR8201521A BR8201521A BR 8201521 A BR8201521 A BR 8201521A BR 8201521 A BR8201521 A BR 8201521A BR 8201521 A BR8201521 A BR 8201521A BR 8201521 A BR8201521 A BR 8201521A
Authority
BR
Brazil
Prior art keywords
reasoning
earth relay
relay
earth
reasoning earth
Prior art date
Application number
BR8201521A
Other languages
English (en)
Inventor
Howard J Calhoun
Original Assignee
Westinghouse Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of BR8201521A publication Critical patent/BR8201521A/pt

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/34—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
    • H02H3/343—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system using phase sequence analysers
BR8201521A 1981-03-20 1982-03-19 Rele de terra de razao BR8201521A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/245,769 US4347542A (en) 1981-03-20 1981-03-20 Ratio ground relay

Publications (1)

Publication Number Publication Date
BR8201521A true BR8201521A (pt) 1983-02-08

Family

ID=22928004

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8201521A BR8201521A (pt) 1981-03-20 1982-03-19 Rele de terra de razao

Country Status (8)

Country Link
US (1) US4347542A (pt)
EP (1) EP0061644A1 (pt)
JP (1) JPS57166818A (pt)
BR (1) BR8201521A (pt)
CA (1) CA1181130A (pt)
ES (1) ES510563A0 (pt)
MX (1) MX151929A (pt)
ZA (1) ZA821639B (pt)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4600961A (en) * 1983-09-01 1986-07-15 Westinghouse Electric Corp. Protective relay apparatus for detecting high-impedance ground faults
US4566053A (en) * 1984-07-10 1986-01-21 Westinghouse Electric Corp. Ground-fault protective relay
US4825327A (en) * 1987-11-12 1989-04-25 General Electric Company Negative and zero sequence directional overcurrent unit for AC power transmission line protection
US5600526A (en) * 1993-10-15 1997-02-04 The Texas A & M University System Load analysis system for fault detection
US5506789A (en) * 1993-10-15 1996-04-09 The Texas A & M University System Load extraction fault detection system
US5550751A (en) * 1993-10-15 1996-08-27 The Texas A & M University System Expert system for detecting high impedance faults
US5485093A (en) * 1993-10-15 1996-01-16 The Texas A & M University System Randomness fault detection system
US5512832A (en) * 1993-10-15 1996-04-30 The Texas A & M University System Energy analysis fault detection system
US5578931A (en) * 1993-10-15 1996-11-26 The Texas A & M University System ARC spectral analysis system
US5659453A (en) * 1993-10-15 1997-08-19 Texas A&M University Arc burst pattern analysis fault detection system
US5796565A (en) * 1996-12-02 1998-08-18 Verkhovskiy; Yan Apparatus and method for starting and protecting a three-phase motor
US7720619B2 (en) * 2006-08-04 2010-05-18 Schweitzer Engineering Laboratories, Inc. Systems and methods for detecting high-impedance faults in a multi-grounded power distribution system
US8433528B2 (en) * 2009-12-18 2013-04-30 Rockwell Automation Technologies, Inc. Ground fault detection system and method
US9274149B2 (en) 2012-04-16 2016-03-01 Hamilton Sundstrand Corporation Frequency phase detection three phase system
MX2015003880A (es) 2012-10-12 2015-07-17 Schweitzer Engineering Lab Inc Sistema y metodos de deteccion de fallas de alta impedancia coordinadas.
CN103245878B (zh) * 2013-04-15 2015-08-26 国家电网公司 一种输电线路单相接地故障单端测距方法
US20150346266A1 (en) * 2014-05-30 2015-12-03 Eaton Corporation System and method for pulsed ground fault detection and localization
US10161986B2 (en) 2016-10-17 2018-12-25 Schweitzer Engineering Laboratories, Inc. Electric power system monitoring using distributed conductor-mounted devices
US11143715B2 (en) * 2019-08-15 2021-10-12 Schweitzer Engineering Laboratories, Inc. Broken conductor detection in a multiple-phase electric power delivery system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1702454A (en) * 1925-12-08 1929-02-19 Westinghouse Electric & Mfg Co Protective relay
US2320861A (en) * 1941-12-30 1943-06-01 Westinghouse Electric & Mfg Co Single-pole protective relaying system
BE468877A (pt) * 1945-11-07
US2858484A (en) * 1953-10-07 1958-10-28 Westinghouse Electric Corp Induction-type alternating-current relays
US4297740A (en) * 1979-02-05 1981-10-27 Westinghouse Electric Corp. Protective relaying apparatus

Also Published As

Publication number Publication date
US4347542A (en) 1982-08-31
ZA821639B (en) 1983-04-27
ES8305968A1 (es) 1983-04-16
EP0061644A1 (en) 1982-10-06
ES510563A0 (es) 1983-04-16
MX151929A (es) 1985-05-03
JPS57166818A (en) 1982-10-14
CA1181130A (en) 1985-01-15

Similar Documents

Publication Publication Date Title
BR7901037A (pt) Rele protetor de terra telecomandado
BR8201521A (pt) Rele de terra de razao
DOP1983004135A (es) Construcciones de hormigon prefabricado.
BR8105660A (pt) Estrutura de terra ancorada
NO821630L (no) System av prefabrikerte betongelementer.
BR8201523A (pt) Rele de terra,de razao
FR2506231B1 (fr) Transmission de tracteur
IT8223527V0 (it) Rele elettromagnetico.
FI824311L (fi) Foerfarande foer permanent formande av haor
BR8202905A (pt) Rele de partida
ATA359881A (de) Untersetzungsgetriebe
FR2508080B1 (fr) Construction de lucarne
DK276081A (da) Hydraulisk styret traekstation
GB2075625B (en) Drain or chimney rods
DK262082A (da) Hydrant
FI824039A0 (fi) Foerfarande foer framstaellning av imidazoler
CU35243A (en) Self-propelled incinerator barge
FR2499355B1 (fr) Arracheuse ou ramasseuse-chargeuse portee
ATA359681A (de) Schneepflug
FI824201L (fi) Prefabricerad smoerjenhet
BR6100005U (pt) Biodigestor pre-fabricado armavel
SE8102379L (sv) Jordvermeplattan ks-01
IT8026658A0 (it) Rifugio interrabile prefabbricato.
IT8167981A0 (it) Concio prefabbricato
ES503374A0 (es) Instalacion para la prevencion de heladas