IE880341L - Ground fault current interrupter circuit - Google Patents

Ground fault current interrupter circuit

Info

Publication number
IE880341L
IE880341L IE880341A IE34188A IE880341L IE 880341 L IE880341 L IE 880341L IE 880341 A IE880341 A IE 880341A IE 34188 A IE34188 A IE 34188A IE 880341 L IE880341 L IE 880341L
Authority
IE
Ireland
Prior art keywords
neutral
ground
ground fault
circuit
scr
Prior art date
Application number
IE880341A
Original Assignee
Patrick Ward
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 Patrick Ward filed Critical Patrick Ward
Priority to IE880341A priority Critical patent/IE880341L/en
Priority to GB8810318A priority patent/GB2215149A/en
Priority to ZA883109A priority patent/ZA883109B/en
Publication of IE880341L publication Critical patent/IE880341L/en

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
    • H02H3/338—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 also responsive to wiring error, e.g. loss of neutral, break
    • 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
    • H02H3/334—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 with means to produce an artificial unbalance for other protection or monitoring reasons or remote control
    • H02H3/335—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 with means to produce an artificial unbalance for other protection or monitoring reasons or remote control the main function being self testing of the device

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Breakers (AREA)

Abstract

A residual current device for use in combination with a circuit breaker 4 to interrupt a mains power supply comprises sensing means 3 to provide a trip signal to activate the circuit breaker SCR, 4 when a ground fault occurs, and directing means including diodes D2, D3 to complete an energizing circuit for the SCR to a neutral or ground lead if the ground or neutral leads respectively are open, without providing a current path between the neutral and ground leads. A test switch T is associated with resistors Rr, Rt which responds to live-neutral reversal. Wire links determine the gain of sensor circuit 3 and hence set the operating trip band of the device. <IMAGE> [GB2215149A]
IE880341A 1988-02-08 1988-02-08 Ground fault current interrupter circuit IE880341L (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
IE880341A IE880341L (en) 1988-02-08 1988-02-08 Ground fault current interrupter circuit
GB8810318A GB2215149A (en) 1988-02-08 1988-04-29 Ground fault current interrupter with open neutral/ground lead operation
ZA883109A ZA883109B (en) 1988-02-08 1988-05-02 Ground fault current interrupter with open neutral/ground lead operation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IE880341A IE880341L (en) 1988-02-08 1988-02-08 Ground fault current interrupter circuit

Publications (1)

Publication Number Publication Date
IE880341L true IE880341L (en) 1989-08-08

Family

ID=11010812

Family Applications (1)

Application Number Title Priority Date Filing Date
IE880341A IE880341L (en) 1988-02-08 1988-02-08 Ground fault current interrupter circuit

Country Status (3)

Country Link
GB (1) GB2215149A (en)
IE (1) IE880341L (en)
ZA (1) ZA883109B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9109477D0 (en) * 1991-05-02 1991-06-26 Mk Electric Ltd Electrical protection devices
GB2268011B (en) * 1992-06-18 1995-11-29 Shakira Ltd A residual current device
CA2093061C (en) 1992-07-22 2005-02-15 Raymond H. Legatti Leakage current protection device adapted to a wide variety of domestic and international applications
US5459630A (en) * 1993-09-15 1995-10-17 Eaton Corporation Self testing circuit breaker ground fault and sputtering arc trip unit
JP2992449B2 (en) * 1994-11-15 1999-12-20 松下電工株式会社 Circuit breaker
US6532424B1 (en) 1995-03-13 2003-03-11 Square D Company Electrical fault detection circuit with dual-mode power supply
US6477021B1 (en) 1998-02-19 2002-11-05 Square D Company Blocking/inhibiting operation in an arc fault detection system
US6782329B2 (en) 1998-02-19 2004-08-24 Square D Company Detection of arcing faults using bifurcated wiring system
US6218844B1 (en) * 1998-12-16 2001-04-17 Square D Company Method and apparatus for testing an arcing fault circuit interrupter
ITRM20090527A1 (en) * 2009-10-12 2011-04-13 Univ Roma INSTRUMENT AND CALIBRATION METHOD FOR TEST DEVICES OF DIFFERENTIAL SWITCHES
EP2926359A1 (en) * 2012-11-29 2015-10-07 Eaton Industries (Austria) GmbH Switching device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL176508C (en) * 1977-06-14 1985-04-16 Hazemeijer Bv NUTRITION EQUIPMENT FOR A PROTECTION DEVICE, SUCH AS AN EARTH DETECTION DEVICE, AND PROTECTION EQUIPMENT EQUIPPED WITH SUCH A NUTRITION EQUIPMENT.
GB2162708B (en) * 1984-07-27 1988-12-14 Technology Res Corp Ground fault current interrupter circuit with open neutral, and ground lead protection
GB2178916B (en) * 1985-06-22 1989-09-06 Ashley Accessories Ltd Detecting abnormal neutral line conditions in electrical circuits

Also Published As

Publication number Publication date
ZA883109B (en) 1988-11-08
GB2215149A (en) 1989-09-13
GB8810318D0 (en) 1988-06-02

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