ZA785060B - Proportional ground current relay - Google Patents

Proportional ground current relay

Info

Publication number
ZA785060B
ZA785060B ZA00785060A ZA785060A ZA785060B ZA 785060 B ZA785060 B ZA 785060B ZA 00785060 A ZA00785060 A ZA 00785060A ZA 785060 A ZA785060 A ZA 785060A ZA 785060 B ZA785060 B ZA 785060B
Authority
ZA
South Africa
Prior art keywords
current relay
ground current
proportional ground
proportional
relay
Prior art date
Application number
ZA00785060A
Other languages
English (en)
Inventor
R Moran
Original Assignee
Mc Graw Edison Co
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 Mc Graw Edison Co filed Critical Mc Graw Edison Co
Publication of ZA785060B publication Critical patent/ZA785060B/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
    • H02H3/083—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 for three-phase systems
    • 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
ZA00785060A 1977-09-06 1978-09-06 Proportional ground current relay ZA785060B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/830,653 US4161761A (en) 1977-09-06 1977-09-06 Proportional ground current relay

Publications (1)

Publication Number Publication Date
ZA785060B true ZA785060B (en) 1979-08-29

Family

ID=25257406

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00785060A ZA785060B (en) 1977-09-06 1978-09-06 Proportional ground current relay

Country Status (7)

Country Link
US (1) US4161761A (pt)
AR (1) AR221064A1 (pt)
AU (1) AU522756B2 (pt)
BR (1) BR7805804A (pt)
CA (1) CA1101066A (pt)
NZ (1) NZ188350A (pt)
ZA (1) ZA785060B (pt)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4272797A (en) * 1979-07-31 1981-06-09 General Electric Company Fast recovery peak detector
US4562506A (en) * 1984-02-14 1985-12-31 Cooper Industries, Inc. Distribution line powered switchgear control
US4931896A (en) * 1985-03-14 1990-06-05 Cooper Industries, Inc. Distribution line switchgear control with isolated cascaded power supplies
US4912591A (en) * 1985-03-14 1990-03-27 Cooper Power Systems, Inc. Distribution line switchgear control employing a precision rectifier
US4851782A (en) * 1987-01-15 1989-07-25 Jeerings Donald I High impedance fault analyzer in electric power distribution
US4928200A (en) * 1987-04-02 1990-05-22 Cherry Semiconductor Corporation Overcurrent protection for switching mode power converter
US8537023B2 (en) * 2011-05-26 2013-09-17 Ilight Technologies, Inc. Method and apparatus pertaining to automatic electrical-fault detection
KR101517159B1 (ko) * 2013-11-13 2015-05-04 주식회사 에렐 감전보호 3상 누전차단기
US11476674B2 (en) * 2018-09-18 2022-10-18 Sentient Technology Holdings, LLC Systems and methods to maximize power from multiple power line energy harvesting devices
JP7148476B2 (ja) * 2019-10-25 2022-10-05 株式会社東芝 電力切替器、電力整流器及び電力変換器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3345539A (en) * 1965-07-19 1967-10-03 Allis Chalmers Mfg Co Static overcurrent tripping system having phase-to-phase and phase-to-ground fault protection
US3434011A (en) * 1966-08-25 1969-03-18 Ite Circuit Breaker Ltd Saturating current transformer for static relays
US3689801A (en) * 1970-05-07 1972-09-05 Westinghouse Electric Corp Circuit breaker including improved current auctioneering circuit
US3956670A (en) * 1973-01-30 1976-05-11 Westinghouse Electric Corporation Circuit interrupter circuit including improved control
US4027203A (en) * 1975-03-06 1977-05-31 Mcgraw-Edison Company Protective switch device for electrical distribution systems
US4060844A (en) * 1976-02-17 1977-11-29 I-T-E Imperial Corporation Solid state tripping circuit

Also Published As

Publication number Publication date
CA1101066A (en) 1981-05-12
BR7805804A (pt) 1979-04-24
US4161761A (en) 1979-07-17
AU3960578A (en) 1980-03-13
AU522756B2 (en) 1982-06-24
NZ188350A (en) 1982-09-07
AR221064A1 (es) 1980-12-30

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