GB1107879A - Improvements in or relating to earth leakage protection devices - Google Patents

Improvements in or relating to earth leakage protection devices

Info

Publication number
GB1107879A
GB1107879A GB16218/65A GB1621865A GB1107879A GB 1107879 A GB1107879 A GB 1107879A GB 16218/65 A GB16218/65 A GB 16218/65A GB 1621865 A GB1621865 A GB 1621865A GB 1107879 A GB1107879 A GB 1107879A
Authority
GB
United Kingdom
Prior art keywords
winding
conductor
earth
terminal
additional primary
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB16218/65A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
J A CRABTREE Ltd Pty
Original Assignee
J A CRABTREE Ltd Pty
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 J A CRABTREE Ltd Pty filed Critical J A CRABTREE Ltd Pty
Publication of GB1107879A publication Critical patent/GB1107879A/en
Expired legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Regulation Of General Use Transformers (AREA)

Abstract

1,107,879. Protective systems. J. A. CRABTREE (PROPRIETARY) Ltd. 15 April, 1965 [17 April, 1964], No. 16218/65. Heading H2K. In an earth leakage protective system comprising a core-balance transformer 3 having at least two primary windings 4, 5 constituted by or connected in supply conductors to a load 8 and a secondary winding 12, the transformer is provided with an additional primary winding 15 having one terminal connected to at least one of the supply conductors in such a manner that under normal operating conditions this terminal is substantially at neutral or earth potential. The other terminal of the winding 15 is connected to an earth conductor of the supply system and/or to a local earth and/or to a neutral conductor of the supply system so that any fault producing a potential difference between the terminals of the additional primary winding effects the opening of a circuit-breaker 9. In the arrangement shown, one terminal of the winding 15 is connected to the neutral conductor 5 and the other is connected through impedances 18, 19 to the earth conductor 23 and to a local earth 27. Each terminal of the winding 15 may be connected to more than one conductor through impedances. An amplifier 13 may be provided and have its power supply unit connected to several conductors through impedances 34-37 to guard against lack of operation due to open circuiting of a conductor. A reservoir capacitor 39 may be provided. Reference is made to the use of the secondary winding as the additional primary winding and to the use of more than one additional primary winding.
GB16218/65A 1964-04-17 1965-04-15 Improvements in or relating to earth leakage protection devices Expired GB1107879A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA641807 1964-04-17

Publications (1)

Publication Number Publication Date
GB1107879A true GB1107879A (en) 1968-03-27

Family

ID=25560821

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16218/65A Expired GB1107879A (en) 1964-04-17 1965-04-15 Improvements in or relating to earth leakage protection devices

Country Status (1)

Country Link
GB (1) GB1107879A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2047965A1 (en) * 1969-06-26 1971-03-19 Chubu Seiki Kk
DE2112065A1 (en) * 1970-03-13 1971-09-23 Apparaeillage Electr Saparel S Fault-protected, highly sensitive differential relay
DE2825881A1 (en) * 1977-06-14 1979-01-04 Hazemeijer Bv FEEDING APPARATUS AND UNITED WITH IT TO A WHOLE, FUNCTIONAL DEVICE, SUCH AS AN EARTH LEAK DETECTION DEVICE
FR2454198A2 (en) * 1979-04-09 1980-11-07 Osmond Max Enhanced sensitivity earth leakage cut=out - has toroidal transformer with differential line and neutral windings
EP0103167A1 (en) * 1982-08-19 1984-03-21 BROWN, BOVERI & CIE Aktiengesellschaft Circuit breaker with leakage current release
GB2135542A (en) * 1983-02-19 1984-08-30 Ashley Accessories Ltd Earth leakage circuit breaker
GB2150374A (en) * 1983-12-08 1985-06-26 Ashley Accessories Ltd Fault detection circuitry
GB2152775A (en) * 1983-11-28 1985-08-07 B & R Electrical Prod Ltd Reversed conductors auto-tripping system
GB2162003A (en) * 1984-05-05 1986-01-22 Ashley Accessories Ltd Earth leakage circuit breakers
GB2178916A (en) * 1985-06-22 1987-02-18 Ashley Accessories Ltd Detecting abnormal neutral line
GB2251992A (en) * 1991-01-17 1992-07-22 Shakira Ltd Missing earth or neutral mains monitor
GB2269064A (en) * 1992-07-22 1994-01-26 Technology Res Corp Ground fault circuit interrupter.
DE4343560A1 (en) * 1993-12-20 1995-06-22 Kopp Heinrich Ag Fault current protection switch

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2047965A1 (en) * 1969-06-26 1971-03-19 Chubu Seiki Kk
DE2112065A1 (en) * 1970-03-13 1971-09-23 Apparaeillage Electr Saparel S Fault-protected, highly sensitive differential relay
DE2825881A1 (en) * 1977-06-14 1979-01-04 Hazemeijer Bv FEEDING APPARATUS AND UNITED WITH IT TO A WHOLE, FUNCTIONAL DEVICE, SUCH AS AN EARTH LEAK DETECTION DEVICE
GB2000398A (en) * 1977-06-14 1979-01-04 Hazemeyer Bv Improvements relating to electrical fault sensitive apparatus for use with mains powered earthed electrical installations
GB2000398B (en) * 1977-06-14 1982-05-26 Hazemeyer Bv Improvements relating to power supply circuits for functional apparatus which is used in conjunction with mains powered earthed electrical installations or devices
FR2454198A2 (en) * 1979-04-09 1980-11-07 Osmond Max Enhanced sensitivity earth leakage cut=out - has toroidal transformer with differential line and neutral windings
EP0103167A1 (en) * 1982-08-19 1984-03-21 BROWN, BOVERI & CIE Aktiengesellschaft Circuit breaker with leakage current release
GB2135542A (en) * 1983-02-19 1984-08-30 Ashley Accessories Ltd Earth leakage circuit breaker
GB2152775A (en) * 1983-11-28 1985-08-07 B & R Electrical Prod Ltd Reversed conductors auto-tripping system
GB2150374A (en) * 1983-12-08 1985-06-26 Ashley Accessories Ltd Fault detection circuitry
GB2162003A (en) * 1984-05-05 1986-01-22 Ashley Accessories Ltd Earth leakage circuit breakers
GB2178916A (en) * 1985-06-22 1987-02-18 Ashley Accessories Ltd Detecting abnormal neutral line
GB2178916B (en) * 1985-06-22 1989-09-06 Ashley Accessories Ltd Detecting abnormal neutral line conditions in electrical circuits
GB2251992A (en) * 1991-01-17 1992-07-22 Shakira Ltd Missing earth or neutral mains monitor
GB2251992B (en) * 1991-01-17 1994-04-06 Shakira Ltd A C mains monitoring circuit
GB2269064A (en) * 1992-07-22 1994-01-26 Technology Res Corp Ground fault circuit interrupter.
US6381113B1 (en) 1992-07-22 2002-04-30 Technology Research Corporation Leakage current protection device adapted to a wide variety of domestic and international applications
DE4343560A1 (en) * 1993-12-20 1995-06-22 Kopp Heinrich Ag Fault current protection switch

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