ZA712479B - An improvement in or relating to circuit breaker including improved ground fault protective device - Google Patents

An improvement in or relating to circuit breaker including improved ground fault protective device

Info

Publication number
ZA712479B
ZA712479B ZA712479A ZA712479A ZA712479B ZA 712479 B ZA712479 B ZA 712479B ZA 712479 A ZA712479 A ZA 712479A ZA 712479 A ZA712479 A ZA 712479A ZA 712479 B ZA712479 B ZA 712479B
Authority
ZA
South Africa
Prior art keywords
relating
improvement
circuit breaker
protective device
ground fault
Prior art date
Application number
ZA712479A
Other languages
English (en)
Inventor
J Wilson
J Engel
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 ZA712479B publication Critical patent/ZA712479B/xx

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
    • H02H3/08—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 excess current
    • H02H3/093—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 excess current with timing means
    • 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
    • H02H3/347—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 summation current transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
ZA712479A 1970-05-07 1971-04-19 An improvement in or relating to circuit breaker including improved ground fault protective device ZA712479B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3551670A 1970-05-07 1970-05-07

Publications (1)

Publication Number Publication Date
ZA712479B true ZA712479B (en) 1972-01-26

Family

ID=21883185

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA712479A ZA712479B (en) 1970-05-07 1971-04-19 An improvement in or relating to circuit breaker including improved ground fault protective device

Country Status (5)

Country Link
US (1) US3660722A (xx)
JP (1) JPS5228980B1 (xx)
BR (1) BR7102729D0 (xx)
DE (1) DE2123514A1 (xx)
ZA (1) ZA712479B (xx)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4895532A (xx) * 1972-03-21 1973-12-07
US3835362A (en) * 1973-08-09 1974-09-10 Safe Flight Instrument Defective battery condition/charging system warning device
US3859565A (en) * 1973-08-20 1975-01-07 Firetrol Inc Fire pump control apparatus
JPS5069631U (xx) * 1973-10-30 1975-06-20
JPS52149950U (xx) * 1976-05-11 1977-11-14
US4149210A (en) * 1977-09-09 1979-04-10 Westinghouse Electric Corp. Electrical apparatus including interlocking circuit for short-time delay and long-time delay tripping
JPH0123605Y2 (xx) * 1981-05-20 1989-07-19
US4712151A (en) * 1985-04-05 1987-12-08 Square D Company System for detection of ground faults in circuit breakers
US4704546A (en) * 1986-07-31 1987-11-03 Westinghouse Electric Corp. Auctioneering circuit
FR2649259B1 (fr) * 1989-07-03 1991-09-13 Merlin Gerin Declencheur statique comportant un systeme de desensibilisation de la protection terre
JPH0742899U (ja) * 1993-12-30 1995-08-11 重春 中尾 簡易焼却炉

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3440491A (en) * 1962-06-05 1969-04-22 Westinghouse Electric Corp Circuit-controlling systems
CA855386A (en) * 1968-10-07 1970-11-03 Westinghouse Electric Corporation Overcurrent protective device

Also Published As

Publication number Publication date
US3660722A (en) 1972-05-02
BR7102729D0 (pt) 1973-04-17
DE2123514A1 (de) 1971-11-25
JPS5228980B1 (xx) 1977-07-29
JPS466177A (xx) 1971-12-07

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