GB962658A - Safety means for protection against leakage currents - Google Patents

Safety means for protection against leakage currents

Info

Publication number
GB962658A
GB962658A GB33448/60A GB3344860A GB962658A GB 962658 A GB962658 A GB 962658A GB 33448/60 A GB33448/60 A GB 33448/60A GB 3344860 A GB3344860 A GB 3344860A GB 962658 A GB962658 A GB 962658A
Authority
GB
United Kingdom
Prior art keywords
earth
conductor
switch
winding
leakage current
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
GB33448/60A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB962658A publication Critical patent/GB962658A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
    • H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
    • 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
    • H02H3/167—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 combined with other earth-fault protective arrangements
    • 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

Landscapes

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

Abstract

962,658. Protective arrangements. R. MOSER, and J. MOREL. Sept. 29, 1960 [Oct. 2, 1959], No. 33448/60. Heading H2K. An earth-leakage protective arrangement includes a core-balance transformer 5 having primary windings 6, 7 connected in series with the phase, neutral and earth conductors, the winding 7 in series with the earth conductor T having a number of turns different from that of the other windings 6. In operation, should a person touch the unearthed frame of an apparatus 3 which has become defective, a small leakage current, e.g. 40 mA., causes sufficient unbalance between the windings 6 for the secondary winding 8 of the transformer to energize the release coil 9 of a switch 12 which opens. Should earth leakage occur on an apparatus 2 to which the earth conductor is connected, then the leakage current produces a flux in the core of the transformer due to the unbalance between the windings 6 and an opposing flux due to the leakage current in the winding 7 and the switch is released when the resultant of these fluxes induces sufficient current in the winding 8. Hence a higher leakage current to earth through the earth conductor is permitted before release of the switch occurs than would be the case when the leakage current does not flow through the conductor T. A resistance 16 connected between the neutral conductor N and the earthing conductor T, permits current to flow to earth through the appropriate winding 6 should the potential of the neutral rise above that of earth and so cause the release of the switch. The resistance 16 is also effective to produce the release of the switch should the earth resistance of the conductor T become too high and an earth fault occur on the apparatus 2.
GB33448/60A 1959-10-02 1960-09-29 Safety means for protection against leakage currents Expired GB962658A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR806618A FR1246800A (en) 1959-10-02 1959-10-02 Safety switch for protection against electric leakage currents

Publications (1)

Publication Number Publication Date
GB962658A true GB962658A (en) 1964-07-01

Family

ID=8719765

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33448/60A Expired GB962658A (en) 1959-10-02 1960-09-29 Safety means for protection against leakage currents

Country Status (8)

Country Link
US (1) US3214638A (en)
BE (1) BE595274A (en)
CH (1) CH366588A (en)
DE (1) DE1140634B (en)
ES (1) ES261758A1 (en)
FR (1) FR1246800A (en)
GB (1) GB962658A (en)
NL (2) NL110540C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0018502A1 (en) * 1979-03-28 1980-11-12 Holger Dr. Lueder Process and installation for the homogeneous-radiation air conditioning of a space, closed on all sides, especially of a tepidarium

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3280375A (en) * 1963-01-17 1966-10-18 Ite Circuit Breaker Ltd Tripping device
AT258340B (en) * 1963-05-31 1967-11-27 Benno Palatini Device for electrical heating of extensive coverings
AT251631B (en) * 1963-09-16 1967-01-10 Herbert Dipl Ing Pferschy Device for heating floor surfaces
US3376477A (en) * 1965-12-06 1968-04-02 Hubbell Inc Harvey Protective circuit
US3374398A (en) * 1966-01-07 1968-03-19 Sanders Associates Inc Magnetic circuit protective device
AT259054B (en) * 1966-01-25 1967-12-27 Uninorm Anstalt Residual current circuit breaker with additional overcurrent release
US3407337A (en) * 1966-11-15 1968-10-22 Purex Corp Ltd Leak detector for swimming pool lights and the like
US3473091A (en) * 1967-04-14 1969-10-14 Hubbell Inc Harvey Ground leakage differential protective apparatus
US3506906A (en) * 1967-12-18 1970-04-14 Rucker Co Ground fault circuit interrupter with inadvertent ground sensor
US3753205A (en) * 1971-06-07 1973-08-14 Wiggins Inc E Coupler device for tubing ends providing mechanical and electrical connections therewith
US3864581A (en) * 1973-01-22 1975-02-04 Varahur Srinivas Satyanarayana Shock prevention device
FR2444359A1 (en) * 1978-12-12 1980-07-11 Barthelemy Louis Power equipment circuit for electrocution protection - overcomes sensitivity problems by measuring imbalance between abnormal earth leakage currents, power input and power output currents
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
US4707759A (en) * 1985-02-27 1987-11-17 Bodkin Lawrence E Universal fault circuit interrupter
WO2007133169A1 (en) * 2006-05-12 2007-11-22 Great Man Made River Co. For Reclamation And Construction Description electro-ageeb electrical safety device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1667655A (en) * 1924-10-03 1928-04-24 Reyrolle A & Co Ltd Controlling or tripping apparatus for alternating-current electric circuits
US1776130A (en) * 1927-10-19 1930-09-16 Gen Electric Protection of electric circuits
GB350751A (en) * 1930-07-01 1931-06-18 Paul Berger Improvements in protective cut-out devices for electrical installations
GB429503A (en) * 1933-11-23 1935-05-23 Reyrolle A & Co Ltd Improvements in or relating to earthing arrangements for electric apparatus
FR900437A (en) * 1942-11-20 1945-06-28 Hermes Patentverwertungs Gmbh Contact protection for electrical devices
GB648207A (en) * 1948-12-16 1951-01-03 British Insulated Callenders Improvements in protective devices for electric circuits
DE1053639B (en) * 1956-08-13 1959-03-26 August Stuke Circuit arrangement for the protection of electrical systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0018502A1 (en) * 1979-03-28 1980-11-12 Holger Dr. Lueder Process and installation for the homogeneous-radiation air conditioning of a space, closed on all sides, especially of a tepidarium

Also Published As

Publication number Publication date
US3214638A (en) 1965-10-26
CH366588A (en) 1963-01-15
ES261758A1 (en) 1960-12-16
FR1246800A (en) 1960-11-25
DE1140634B (en) 1962-12-06
BE595274A (en) 1961-01-16
NL256426A (en)
NL110540C (en)

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