GB1398892A - Power switching apparatus - Google Patents

Power switching apparatus

Info

Publication number
GB1398892A
GB1398892A GB2690272A GB2690272A GB1398892A GB 1398892 A GB1398892 A GB 1398892A GB 2690272 A GB2690272 A GB 2690272A GB 2690272 A GB2690272 A GB 2690272A GB 1398892 A GB1398892 A GB 1398892A
Authority
GB
United Kingdom
Prior art keywords
limiter
current
relay
circuit
energized
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
GB2690272A
Inventor
Kiyoshi Yamagata
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of GB1398892A publication Critical patent/GB1398892A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/1045—Multiple circuits-breaker, e.g. for the purpose of dividing current or potential drop
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
    • G01N27/68—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using electric discharge to ionise a gas
    • G01N27/70—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using electric discharge to ionise a gas and measuring current or voltage
    • 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
    • H02H3/02—Details
    • H02H3/025—Disconnection after limiting, e.g. when limiting is not sufficient or for facilitating disconnection

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

1398892 Protective arrangements MITSUBISHI DENKI KK 8 June 1972 26902/72 Heading H2K An over-current protective arrangement comprises a self-restoring current limiter 10, a relay R responsive to the voltage across the limiter, and a circuit-breaker 40, 50 controlled by the relay, the relay contacts 30 and tripping coil 50 being connected in an auxiliary power supply circuit. The current-limiter is of the kind in which an alkali metal, e.g. sodium or potassium or a mixture thereof, is vapourized by the heat produced by the over-current to provide resistance in the protected circuit, the metal condensing on cooling to render the limiter fully conducting. The relay contacts 30 may be normally open or normally closed depending on whether the coil 50 of the circuitbreaker is to be energized or de-energized to cause release of the circuit breaker contacts 40.
GB2690272A 1972-06-05 1972-03-16 Power switching apparatus Expired GB1398892A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US00259870A US3745369A (en) 1972-06-05 1972-06-05 Circuit breaker
DE2228592A DE2228592B2 (en) 1972-06-05 1972-06-12 Circuit breaker device
FR7221241A FR2188338A1 (en) 1972-06-05 1972-06-13 CIRCUIT BREAKER

Publications (1)

Publication Number Publication Date
GB1398892A true GB1398892A (en) 1975-06-25

Family

ID=72193193

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2690272A Expired GB1398892A (en) 1972-06-05 1972-03-16 Power switching apparatus

Country Status (4)

Country Link
US (1) US3745369A (en)
DE (1) DE2228592B2 (en)
FR (1) FR2188338A1 (en)
GB (1) GB1398892A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973233A (en) * 1974-09-13 1976-08-03 Mitsubishi Denki Kabushiki Kaisha Circuit interrupter
US4019097A (en) * 1974-12-10 1977-04-19 Westinghouse Electric Corporation Circuit breaker with solid state passive overcurrent sensing device
FR2406329A1 (en) * 1977-10-11 1979-05-11 Prima Simone Load shedding system for electric supply circuit - compares voltage across resistive fuse with preset level to determine switch=off point
JPS5840750Y2 (en) * 1978-08-08 1983-09-13 三菱電機株式会社 Power cutoff device
US4450496A (en) * 1979-08-16 1984-05-22 Raychem Corporation Protection of certain electrical systems by use of PTC device
DE2935807A1 (en) * 1979-09-05 1981-04-02 Brown, Boveri & Cie Ag, 6800 Mannheim Overload protection circuit - has PTC resistor in series with load and shunted by overload warning lamp
JPS60105123A (en) * 1983-11-10 1985-06-10 三菱電機株式会社 High speed current limiting breaker
US4949214A (en) * 1989-08-28 1990-08-14 Spencer George A Trip delay override for electrical circuit breakers
US5051649A (en) * 1989-09-08 1991-09-24 John F. Waymouth Intellectual Property And Education Trust Arc discharge lamp with liquid metal and heating means
DE10105457A1 (en) * 2001-02-07 2002-08-08 Daimler Chrysler Ag Device for disconnecting and switching a load
US8138439B2 (en) * 2010-02-11 2012-03-20 Eaton Corporation Limiter including a number of gas channels and electrical switching apparatus employing the same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3454833A (en) * 1967-08-16 1969-07-08 Gen Electric Current limiter device-thyristor current limiting static circuit breaker
US3454832A (en) * 1967-08-24 1969-07-08 Gen Electric Electric circuit interrupter

Also Published As

Publication number Publication date
FR2188338B1 (en) 1976-08-06
FR2188338A1 (en) 1974-01-18
DE2228592B2 (en) 1974-04-11
DE2228592A1 (en) 1974-01-03
US3745369A (en) 1973-07-10
DE2228592C3 (en) 1974-11-07

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee