GB2021337A - An electrical protection device - Google Patents

An electrical protection device

Info

Publication number
GB2021337A
GB2021337A GB7917255A GB7917255A GB2021337A GB 2021337 A GB2021337 A GB 2021337A GB 7917255 A GB7917255 A GB 7917255A GB 7917255 A GB7917255 A GB 7917255A GB 2021337 A GB2021337 A GB 2021337A
Authority
GB
United Kingdom
Prior art keywords
circuit
protection device
electrical protection
breaker arrangement
detector
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.)
Granted
Application number
GB7917255A
Other versions
GB2021337B (en
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.)
LAPROM CORP NV
Original Assignee
LAPROM CORP NV
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 LAPROM CORP NV filed Critical LAPROM CORP NV
Publication of GB2021337A publication Critical patent/GB2021337A/en
Application granted granted Critical
Publication of GB2021337B publication Critical patent/GB2021337B/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
    • H02H3/26—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)
  • Breakers (AREA)

Abstract

An electrical protection device is incorporated in a plug body for attachment to the leads of a mains operated electrical appliance. The device comprises a faulty current detector (e.g. a core-balance transformer for earth leakage protection) and a non-resettable circuit-breaker arrangement controlled by the detector. The circuit-breaker arrangement may comprise a crowbar circuit and fuse, or a bistable electret relay.
GB7917255A 1978-05-23 1979-05-17 Electrical protection device Expired GB2021337B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH558878 1978-05-23

Publications (2)

Publication Number Publication Date
GB2021337A true GB2021337A (en) 1979-11-28
GB2021337B GB2021337B (en) 1982-06-03

Family

ID=4296096

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7917255A Expired GB2021337B (en) 1978-05-23 1979-05-17 Electrical protection device

Country Status (7)

Country Link
JP (1) JPS5523787A (en)
AU (1) AU4719479A (en)
DE (1) DE2920287A1 (en)
FR (1) FR2426973A1 (en)
GB (1) GB2021337B (en)
NL (1) NL7904040A (en)
SE (1) SE7904447L (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2554986A1 (en) * 1983-11-15 1985-05-17 Matsushita Electric Works Ltd PORTABLE ELECTRIC HAIRDRESSING INSTRUMENT
WO1990007214A1 (en) * 1988-12-16 1990-06-28 Solar Wide Industrial Ltd Method and apparatus for protecting electrical systems
EP0417719A1 (en) * 1989-09-14 1991-03-20 ELECTRICAL SAFETY COMPANY S.r.l. Anti-electric shock safety system, for electric machinery and installations
GB2296609A (en) * 1994-12-08 1996-07-03 Darren John Spreyer The double fuse spur
GB2299900A (en) * 1995-04-12 1996-10-16 Itt Ind Ltd Electrical connector
EP0952653A2 (en) * 1998-04-22 1999-10-27 Siemens Aktiengesellschaft Failure protection for protective switching device
WO2007095874A1 (en) * 2006-02-23 2007-08-30 Siemens Aktiengesellschaft Overcurrent switching apparatus

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3338820A1 (en) * 1983-10-26 1985-05-15 Robert Krups Stiftung & Co KG, 5650 Solingen ELECTRICAL CONNECTION DEVICE, LIKE SOCKET, WITH FAULT CURRENT SWITCH FOR ELECTRICAL CONSUMERS
JPS60204655A (en) * 1984-03-30 1985-10-16 ニチアス株式会社 Xonotlite forming material
AT388625B (en) * 1987-11-19 1989-08-10 Bremel Hans PROTECTIVE DEVICE FOR ELECTRICAL POWER SUPPLIES, IN PARTICULAR HAND DEVICES
DE102019103621A1 (en) * 2019-02-14 2020-08-20 Doepke Schaltgeräte GmbH Device for protection against electric shock or for protection against overcurrent

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1053639B (en) * 1956-08-13 1959-03-26 August Stuke Circuit arrangement for the protection of electrical systems
BE627217A (en) * 1962-01-26
FR1438209A (en) * 1964-06-17 1966-05-13 High differential sensitivity safety relay with remote action on a downstream protection device
CH519782A (en) * 1970-11-20 1972-02-29 Etem Ets De Tech Mod Differential circuit breaker
DE2360037A1 (en) * 1973-12-01 1975-06-12 Danfoss As SAFETY CIRCUIT FOR AN ELECTRICAL DEVICE
FR2294535A1 (en) * 1974-12-10 1976-07-09 Lewiner Jacques IMPROVEMENTS TO RELAY TYPE CONTROL DEVICES

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2554986A1 (en) * 1983-11-15 1985-05-17 Matsushita Electric Works Ltd PORTABLE ELECTRIC HAIRDRESSING INSTRUMENT
GB2149985A (en) * 1983-11-15 1985-06-19 Matsushita Electric Works Ltd Protection of electric hair dressing implements
WO1990007214A1 (en) * 1988-12-16 1990-06-28 Solar Wide Industrial Ltd Method and apparatus for protecting electrical systems
EP0417719A1 (en) * 1989-09-14 1991-03-20 ELECTRICAL SAFETY COMPANY S.r.l. Anti-electric shock safety system, for electric machinery and installations
GB2296609A (en) * 1994-12-08 1996-07-03 Darren John Spreyer The double fuse spur
GB2296609B (en) * 1994-12-08 1998-10-28 Darren John Spreyer The double fuse spur
GB2299900A (en) * 1995-04-12 1996-10-16 Itt Ind Ltd Electrical connector
EP0952653A2 (en) * 1998-04-22 1999-10-27 Siemens Aktiengesellschaft Failure protection for protective switching device
EP0952653A3 (en) * 1998-04-22 2002-03-20 Siemens Aktiengesellschaft Failure protection for protective switching device
WO2007095874A1 (en) * 2006-02-23 2007-08-30 Siemens Aktiengesellschaft Overcurrent switching apparatus

Also Published As

Publication number Publication date
NL7904040A (en) 1979-11-27
GB2021337B (en) 1982-06-03
SE7904447L (en) 1979-11-24
FR2426973A1 (en) 1979-12-21
DE2920287A1 (en) 1979-11-29
JPS5523787A (en) 1980-02-20
AU4719479A (en) 1979-11-29

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee