SE408983B - Differentialskydd - Google Patents

Differentialskydd

Info

Publication number
SE408983B
SE408983B SE7712755A SE7712755A SE408983B SE 408983 B SE408983 B SE 408983B SE 7712755 A SE7712755 A SE 7712755A SE 7712755 A SE7712755 A SE 7712755A SE 408983 B SE408983 B SE 408983B
Authority
SE
Sweden
Prior art keywords
differential
level
circuit
stabilizing
relay
Prior art date
Application number
SE7712755A
Other languages
English (en)
Swedish (sv)
Other versions
SE7712755L (sv
Inventor
T Forford
Original Assignee
Asea Ab
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 Asea Ab filed Critical Asea Ab
Priority to SE7712755A priority Critical patent/SE408983B/sv
Priority to CH1018178A priority patent/CH639223A5/de
Priority to FR7829745A priority patent/FR2408933A1/fr
Priority to DE19782846570 priority patent/DE2846570A1/de
Priority to US05/958,481 priority patent/US4237512A/en
Priority to GB7843862A priority patent/GB2010031B/en
Priority to CA316,099A priority patent/CA1130437A/en
Priority to IT69578/78A priority patent/IT1108314B/it
Publication of SE7712755L publication Critical patent/SE7712755L/
Publication of SE408983B publication Critical patent/SE408983B/sv

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
    • H02H3/28—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 two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus
    • H02H3/283—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 two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus and taking into account saturation of current transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Breakers (AREA)
SE7712755A 1977-11-11 1977-11-11 Differentialskydd SE408983B (sv)

Priority Applications (8)

Application Number Priority Date Filing Date Title
SE7712755A SE408983B (sv) 1977-11-11 1977-11-11 Differentialskydd
CH1018178A CH639223A5 (de) 1977-11-11 1978-09-29 Differentialschutzschaltung fuer ein elektrisches anlagenobjekt, insbesondere fuer generatoren, sammelschienen oder leitungsstrecken.
FR7829745A FR2408933A1 (fr) 1977-11-11 1978-10-19 Protection differentielle pour elements d'installation electrique
DE19782846570 DE2846570A1 (de) 1977-11-11 1978-10-26 Differentialschutz
US05/958,481 US4237512A (en) 1977-11-11 1978-11-07 Differential protection circuitry for electrical devices
GB7843862A GB2010031B (en) 1977-11-11 1978-11-09 Differential protection means for electrical plant
CA316,099A CA1130437A (en) 1977-11-11 1978-11-09 Differential protection circuitry for electrical devices
IT69578/78A IT1108314B (it) 1977-11-11 1978-11-10 Protezione differenziale per componenti di impianti elettrici

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7712755A SE408983B (sv) 1977-11-11 1977-11-11 Differentialskydd

Publications (2)

Publication Number Publication Date
SE7712755L SE7712755L (sv) 1979-05-12
SE408983B true SE408983B (sv) 1979-07-16

Family

ID=20332834

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7712755A SE408983B (sv) 1977-11-11 1977-11-11 Differentialskydd

Country Status (8)

Country Link
US (1) US4237512A (it)
CA (1) CA1130437A (it)
CH (1) CH639223A5 (it)
DE (1) DE2846570A1 (it)
FR (1) FR2408933A1 (it)
GB (1) GB2010031B (it)
IT (1) IT1108314B (it)
SE (1) SE408983B (it)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS596715A (ja) * 1982-07-01 1984-01-13 三菱電機株式会社 差動保護継電装置
US4623949A (en) 1985-09-06 1986-11-18 Westinghouse Electric Corp. Bus differential relay
US4939617A (en) * 1989-05-05 1990-07-03 Dowty Rfl Industries Inc. Method and apparatus for monitoring an AC transmission line
US5157575A (en) * 1991-05-13 1992-10-20 Schweitzer Engineering Laboratories, Inc. Circuit breaker failure relay system for power transmission line systems
US6442010B1 (en) * 2000-04-03 2002-08-27 General Electric Company Differential protective relay for electrical buses with improved immunity to saturation of current transformers
DE10106279A1 (de) * 2001-02-05 2002-08-29 Siemens Ag Verfahren zum Erzeugen eines Auslösesignals nach demStromdifferentialschutzprinzip und Stromdifferentialschutzanordnung
US6611411B2 (en) * 2001-04-06 2003-08-26 General Electric Company Trip signal verifying method and apparatus
ES2287236T3 (es) * 2002-03-26 2007-12-16 Abb Schweiz Ag Comprobacion de pausabilidad de transformadores de corriente en subestaciones.
US9864008B2 (en) 2014-03-31 2018-01-09 Schweitzer Engineering Laboratories, Inc. Electric power system circuit breaker trip diagnostic
US12181524B2 (en) 2022-07-12 2024-12-31 Schweitzer Engineering Laboratories, Inc. Trip circuit current display

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2608606A (en) * 1950-06-29 1952-08-26 Westinghouse Electric Corp Bus differential protection
US3337772A (en) * 1963-12-28 1967-08-22 Asea Ab Transformer differential protection
FR1541160A (fr) * 1967-08-31 équerre polyvalente pour travaux graphiques et autres
SE338093B (it) * 1968-04-24 1971-08-30 Asea Ab
DE1763564B2 (de) * 1968-06-25 1972-08-17 Siemens AG, 1000 Berlin u. 8000 München Stabilisierte differentialschutzeinrichtung fuer sammelschienen mit mehreren abzweigen
DE1956527C3 (de) * 1969-11-11 1973-01-04 Siemens Ag, 1000 Berlin U. 8000 Muenchen Differentialschutzeinrichtung
US3974423A (en) * 1974-11-01 1976-08-10 Evgeny Mefodievich Ulyanitsky Differential current protective device

Also Published As

Publication number Publication date
GB2010031B (en) 1982-04-28
FR2408933A1 (fr) 1979-06-08
GB2010031A (en) 1979-06-20
CA1130437A (en) 1982-08-24
CH639223A5 (de) 1983-10-31
SE7712755L (sv) 1979-05-12
US4237512A (en) 1980-12-02
FR2408933B1 (it) 1983-12-09
DE2846570A1 (de) 1979-05-17
IT1108314B (it) 1985-12-09
IT7869578A0 (it) 1978-11-10

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