ZA737756B - Gfi circuit having tuned circuit fault detector - Google Patents

Gfi circuit having tuned circuit fault detector

Info

Publication number
ZA737756B
ZA737756B ZA737756*A ZA737756A ZA737756B ZA 737756 B ZA737756 B ZA 737756B ZA 737756 A ZA737756 A ZA 737756A ZA 737756 B ZA737756 B ZA 737756B
Authority
ZA
South Africa
Prior art keywords
circuit
fault detector
gfi
tuned
circuit fault
Prior art date
Application number
ZA737756*A
Other languages
English (en)
Inventor
H Loh
Original Assignee
Amf Inc
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 Amf Inc filed Critical Amf Inc
Publication of ZA737756B publication Critical patent/ZA737756B/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
    • H02H3/26—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
    • H02H3/33—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 using summation current transformers
    • H02H3/337—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 using summation current transformers avoiding disconnection due to reactive fault currents
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
    • H02H1/003—Fault detection by injection of an auxiliary voltage
    • 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
    • H02H3/16—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 fault current to earth, frame or mass
    • H02H3/17—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 fault current to earth, frame or mass by means of an auxiliary voltage injected into the installation to be protected

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
ZA737756*A 1973-04-23 1973-10-03 Gfi circuit having tuned circuit fault detector ZA737756B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US35379173A 1973-04-23 1973-04-23

Publications (1)

Publication Number Publication Date
ZA737756B true ZA737756B (en) 1974-08-28

Family

ID=23390591

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA737756*A ZA737756B (en) 1973-04-23 1973-10-03 Gfi circuit having tuned circuit fault detector

Country Status (7)

Country Link
US (1) US3801871A (xx)
JP (1) JPS502144A (xx)
CA (1) CA997850A (xx)
DE (1) DE2357361A1 (xx)
FR (1) FR2226769A1 (xx)
GB (1) GB1402500A (xx)
ZA (1) ZA737756B (xx)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4053815A (en) * 1973-09-10 1977-10-11 Federal Pacific Electric Company Ground fault interrupters
CH607057A5 (xx) * 1975-03-03 1978-11-30 Bbc Brown Boveri & Cie
US4001646A (en) * 1975-06-16 1977-01-04 General Electric Company Ground fault circuit interrupter utilizing a single transformer
US4052751A (en) * 1976-04-12 1977-10-04 The Gillette Company Ground fault interrupter circuit
US4150411A (en) * 1977-12-15 1979-04-17 General Electric Company Ground fault circuit interrupter utilizing a single transformer
FR2453490A1 (fr) * 1979-04-06 1980-10-31 Telemecanique Electrique Dispositif de protection des personnes contre les contacts directs avec l'un des conducteurs de phase d'un reseau de distribution electrique et de protection contre les defauts d'isolement du conducteur neutre
US4422034A (en) * 1980-01-22 1983-12-20 Toyo Sushinki Kabushiki Kaisha Method for measuring insulation resistance and device therefor
US4371832A (en) * 1980-05-27 1983-02-01 Wilson Gerald L DC Ground fault detector wherein fault is sensed by noting imbalance of magnetic flux in a magnetic core
US4564747A (en) * 1983-09-30 1986-01-14 Chevron Research Company Methods and apparatus for detecting abnormalities in proximity effect heat-tracing circuits
GB8512133D0 (en) * 1985-05-14 1985-06-19 Dorman Smith Switchgear Ltd Residual current detector
US7079365B2 (en) * 2002-11-22 2006-07-18 Square D Company Electrical fault detection system
US7215519B2 (en) * 2003-10-20 2007-05-08 The Boeing Company Ground and line fault interrupt controller/adapter
US8018235B2 (en) * 2006-11-02 2011-09-13 Texas Instruments Incorporated Methods and apparatus to facilitate ground fault detection with a single coil and an oscillator
DE102010013642B4 (de) * 2010-04-01 2022-01-20 Doepke Schaltgeräte GmbH Verfahren zum Kompensieren von Ableitströmen und Differenzstromschutz- oderÜberwachungseinrichtung
US8472154B2 (en) 2010-12-08 2013-06-25 General Electric Company Systems, methods, and apparatus for leakage current masking and ground fault detection
GB201102031D0 (en) 2011-02-07 2011-03-23 Rolls Royce Plc Protection system for an electrical power network
WO2012127686A1 (ja) 2011-03-24 2012-09-27 東芝三菱電機産業システム株式会社 地絡検出回路
FR2993057B1 (fr) * 2012-07-06 2014-08-08 Schneider Electric Ind Sas Dispositif de detection d'etat ouvert ou ferme d'interrupteur et dispositif de monitorage de relais de protection de transformateur associe
US9685910B2 (en) * 2014-10-03 2017-06-20 Short Circuit Technologies Llc Transformer based impedance matching network and related power amplifier, ADPLL and transmitter based thereon

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3761774A (en) * 1970-03-20 1973-09-25 Black & Decker Mfg Co Ground fault protective apparatus
US3713003A (en) * 1971-02-16 1973-01-23 Purex Corp Ltd Fault or leak detector

Also Published As

Publication number Publication date
JPS502144A (xx) 1975-01-10
CA997850A (en) 1976-09-28
DE2357361A1 (de) 1974-11-07
FR2226769A1 (xx) 1974-11-15
AU6117673A (en) 1975-04-10
GB1402500A (en) 1975-08-06
US3801871A (en) 1974-04-02

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