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GB1483635A - Electrical current limiting device - Google Patents

Electrical current limiting device

Info

Publication number
GB1483635A
GB1483635A GB4867474A GB4867474A GB1483635A GB 1483635 A GB1483635 A GB 1483635A GB 4867474 A GB4867474 A GB 4867474A GB 4867474 A GB4867474 A GB 4867474A GB 1483635 A GB1483635 A GB 1483635A
Authority
GB
United Kingdom
Prior art keywords
contacts
contact
arc
current limiting
gas
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
GB4867474A
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.)
BBC BROWN BOVERI and CIE
BBC Brown Boveri AG Switzerland
Original Assignee
BBC BROWN BOVERI and CIE
BBC Brown Boveri AG Switzerland
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 BBC BROWN BOVERI and CIE, BBC Brown Boveri AG Switzerland filed Critical BBC BROWN BOVERI and CIE
Publication of GB1483635A publication Critical patent/GB1483635A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/107—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by the blow-off force generating means, e.g. current loops
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H2077/025—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with pneumatic means, e.g. by arc pressure

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Circuit Breakers (AREA)

Abstract

1483635 Current limiting devices BBC BROWN BOVERI & CO Ltd 11 Nov 1974 [12 Nov 1973] 48674/74 Heading H1N [Also in in Division H2] A restorable current limiting device comprises, in a chamber 5, a fixed contact 1 and a moving contact 3, an electrodynamic actuating spring coil 4 which separates the contacts when a predetermined magnitude of current flows through them, and a piston 3a integral with the movable contact and arranged to move in response to an increase in gas pressure in the contact region of the chamber 5, due to an arc struck between the contacts, to assist in separating the contacts. The resistance of the arc between the contacts limits the current flowing through the contacts. The gas may be evolved from gas evolving material which is used for constructing or coating the housing or a sheath 5a insulating the fixed contact. Movement of the piston opens gas venting ports 8 in the wall of the chamber. The movable contact 3 is connected to an insulating tappet 9 which actuates or trips a circuit breaker connected in series with the current limiting device. An axial magnetic field generated in the spring coil 4 has a destabilizing effect on the arc and reduces contact burning. In a second embodiment, Fig. 2, not shown, both contacts are movable and arranged in the same way as the movable contact in the first embodiment with associated spring coils and pistons in a symmetrical construction. Annular electrodes are associated with the moving contacts and serve as tracks for the arc, these electrodes having limited movement compared with the contacts and being used to uncover the venting ports when they are moved by gas pressure.
GB4867474A 1973-11-12 1974-11-11 Electrical current limiting device Expired GB1483635A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1587773A CH566640A5 (en) 1973-11-12 1973-11-12

Publications (1)

Publication Number Publication Date
GB1483635A true GB1483635A (en) 1977-08-24

Family

ID=4412711

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4867474A Expired GB1483635A (en) 1973-11-12 1974-11-11 Electrical current limiting device

Country Status (5)

Country Link
JP (1) JPS5079741A (en)
CH (1) CH566640A5 (en)
DE (2) DE2360773A1 (en)
FR (1) FR2251094B3 (en)
GB (1) GB1483635A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112840430A (en) * 2018-08-02 2021-05-25 威洛科技有限公司 contactor

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55106546U (en) * 1979-01-22 1980-07-25
US4407630A (en) * 1979-01-22 1983-10-04 Setsuo Toda Work feed method in a press
DE2937490A1 (en) * 1979-09-17 1981-04-02 Siemens AG, 1000 Berlin und 8000 München CURRENT LIMITERS
EP2814049A1 (en) * 2013-06-11 2014-12-17 ABB Technology AG Drive mechanism for a switching device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112840430A (en) * 2018-08-02 2021-05-25 威洛科技有限公司 contactor

Also Published As

Publication number Publication date
DE7343364U (en) 1975-10-16
DE2360773A1 (en) 1975-05-15
JPS5079741A (en) 1975-06-28
CH566640A5 (en) 1975-09-15
FR2251094A1 (en) 1975-06-06
FR2251094B3 (en) 1977-08-12

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Legal Events

Date Code Title Description
PS Patent sealed
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee