JPS4943140A - - Google Patents

Info

Publication number
JPS4943140A
JPS4943140A JP48057908A JP5790873A JPS4943140A JP S4943140 A JPS4943140 A JP S4943140A JP 48057908 A JP48057908 A JP 48057908A JP 5790873 A JP5790873 A JP 5790873A JP S4943140 A JPS4943140 A JP S4943140A
Authority
JP
Japan
Legal status (The legal status 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 status listed.)
Pending
Application number
JP48057908A
Other languages
Japanese (ja)
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 filed Critical
Publication of JPS4943140A publication Critical patent/JPS4943140A/ja
Pending legal-status Critical Current

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
    • H02H3/40—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 ratio of voltage and current
    • 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
    • H02H3/38—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 both voltage and current; responsive to phase angle between voltage and current
    • H02H3/382—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 both voltage and current; responsive to phase angle between voltage and current involving phase comparison between current and voltage or between values derived from current and voltage

Landscapes

  • Emergency Protection Circuit Devices (AREA)
JP48057908A 1972-05-25 1973-05-25 Pending JPS4943140A (hu)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25666872A 1972-05-25 1972-05-25

Publications (1)

Publication Number Publication Date
JPS4943140A true JPS4943140A (hu) 1974-04-23

Family

ID=22973115

Family Applications (1)

Application Number Title Priority Date Filing Date
JP48057908A Pending JPS4943140A (hu) 1972-05-25 1973-05-25

Country Status (2)

Country Link
US (1) US3731152A (hu)
JP (1) JPS4943140A (hu)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2247746C3 (de) * 1972-09-29 1975-11-27 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren zum Messen einer Leitungsimpedanz
US3885199A (en) * 1973-07-02 1975-05-20 Hitachi Ltd Protective relaying device
JPS6360610B2 (hu) * 1973-12-07 1988-11-25
IN143431B (hu) * 1975-05-14 1977-11-26 Westinghouse Electric Corp
JPS52100149A (en) * 1976-02-18 1977-08-22 Tokyo Electric Power Co Inc:The Digital failure point evaluating unit
US4148087A (en) * 1977-04-20 1979-04-03 Phadke Arun G Distance relay for electric power transmission lines
JPS53141442A (en) * 1977-05-16 1978-12-09 Tokyo Electric Power Co Inc:The Distance relay
CH623964A5 (hu) * 1977-10-31 1981-06-30 Bbc Brown Boveri & Cie
CH642491A5 (de) * 1978-08-29 1984-04-13 Bbc Brown Boveri & Cie Verfahren und einrichtung zur fehlerdetektion an elektrischen leitungen.
US4219858A (en) * 1978-12-20 1980-08-26 General Electric Company Overcurrent relay apparatus
US4395671A (en) * 1979-06-20 1983-07-26 Emhart Industries, Inc. Control system and method for motor starting
US4321681A (en) * 1979-09-21 1982-03-23 Westinghouse Electric Corp. Protective relay apparatus
US4377833A (en) * 1981-08-17 1983-03-22 Electric Power Research Institute, Inc. Methods and apparatus for protecting electrical reactors
US4455612A (en) * 1982-01-27 1984-06-19 Iowa State University Research Foundation, Inc. Recursive estimation in digital distance relaying system
US4625283A (en) * 1982-05-07 1986-11-25 Cooper Industries, Inc. Method and apparatus for digitally measuring alternating current
KR910000118B1 (ko) * 1985-11-07 1991-01-21 가부시끼가이샤 도시바 전력계통의 정보 데이타 출력장치
JPH0580982A (ja) * 1991-09-19 1993-04-02 Nec Corp 絶対値回路
US6137666A (en) * 1999-01-21 2000-10-24 Abb Power T&D Company Inc. High speed, selective protective relays
US6879917B2 (en) 2002-06-14 2005-04-12 Progress Energy Carolinas Inc. Double-ended distance-to-fault location system using time-synchronized positive-or negative-sequence quantities
US7423964B2 (en) * 2004-11-18 2008-09-09 International Business Machines Corporation Apparatus and method to set the signaling rate of a network disposed within an information storage and retrieval system
EP2084799A4 (en) * 2006-10-13 2014-04-23 Abb Technology Ag ERROR PHASE DECISION METHOD BETWEEN ELECTRIC AND VOLTAGE-BASED DELTA PHASE SENSORS

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3569785A (en) * 1968-07-09 1971-03-09 Ibm Power system protective relaying by time-coordinated sampling and calculation
US3654516A (en) * 1971-04-07 1972-04-04 Westinghouse Electric Corp Change of current or voltage acutated protecting relay

Also Published As

Publication number Publication date
US3731152A (en) 1973-05-01

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