FR2331181A1 - Current imbalance safety circuit - has ring of magnetic material surrounding two opposed conductor wires - Google Patents

Current imbalance safety circuit - has ring of magnetic material surrounding two opposed conductor wires

Info

Publication number
FR2331181A1
FR2331181A1 FR7633879A FR7633879A FR2331181A1 FR 2331181 A1 FR2331181 A1 FR 2331181A1 FR 7633879 A FR7633879 A FR 7633879A FR 7633879 A FR7633879 A FR 7633879A FR 2331181 A1 FR2331181 A1 FR 2331181A1
Authority
FR
France
Prior art keywords
ring
conductors
magnetic material
safety circuit
material surrounding
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
FR7633879A
Other languages
French (fr)
Other versions
FR2331181B3 (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.)
Black and Decker Ltd
Original Assignee
Black and Decker Ltd
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 Black and Decker Ltd filed Critical Black and Decker Ltd
Publication of FR2331181A1 publication Critical patent/FR2331181A1/en
Application granted granted Critical
Publication of FR2331181B3 publication Critical patent/FR2331181B3/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means
    • 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

Abstract

Each conductor carries the same current and generates in the magnetic ring an equal magnetic flux which is of opposite polarity, so that the total flux is zero. An output winding is provided on the ring, connected to an output switching circuit responding to an output signal. It signals imbalance of currents flowing in the conductors. There may be two conductors or a larger even number of conductors. There may be six conductors in a hexagonal arrangement around an inert central core.
FR7633879A 1975-11-10 1976-11-10 Current imbalance safety circuit - has ring of magnetic material surrounding two opposed conductor wires Granted FR2331181A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4633175 1975-11-10

Publications (2)

Publication Number Publication Date
FR2331181A1 true FR2331181A1 (en) 1977-06-03
FR2331181B3 FR2331181B3 (en) 1979-07-27

Family

ID=10440810

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7633879A Granted FR2331181A1 (en) 1975-11-10 1976-11-10 Current imbalance safety circuit - has ring of magnetic material surrounding two opposed conductor wires

Country Status (3)

Country Link
DE (1) DE2651245A1 (en)
FR (1) FR2331181A1 (en)
IT (1) IT1073771B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2520165A1 (en) * 1982-01-18 1983-07-22 Claude Sa DIFFERENTIAL SWITCH FOR DOMESTIC USE

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2924122C2 (en) * 1979-06-15 1984-07-05 Kommanditgesellschaft Ritz Messwandler Gmbh & Co, 2000 Hamburg Electronic residual current protective device
DE3048785A1 (en) * 1980-12-23 1982-07-15 Brown, Boveri & Cie Ag, 6800 Mannheim CIRCUIT ARRANGEMENT FOR DETECTING A FAULT CURRENT
DE3315190A1 (en) * 1983-04-27 1984-10-31 Felten & Guilleaume Energietechnik GmbH, 5000 Köln Triggering system for protection circuit breakers, especially for earth-leakage current protection circuit breakers
DE3409603A1 (en) * 1984-03-15 1985-09-19 Siemens AG, 1000 Berlin und 8000 München Earth-leakage current protection circuit breaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2520165A1 (en) * 1982-01-18 1983-07-22 Claude Sa DIFFERENTIAL SWITCH FOR DOMESTIC USE

Also Published As

Publication number Publication date
IT1073771B (en) 1985-04-17
FR2331181B3 (en) 1979-07-27
DE2651245A1 (en) 1977-05-18

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Legal Events

Date Code Title Description
ST Notification of lapse