EP0404172A3 - Heavy-duty contact, particularly for low tension switch gear - Google Patents

Heavy-duty contact, particularly for low tension switch gear Download PDF

Info

Publication number
EP0404172A3
EP0404172A3 EP19900111870 EP90111870A EP0404172A3 EP 0404172 A3 EP0404172 A3 EP 0404172A3 EP 19900111870 EP19900111870 EP 19900111870 EP 90111870 A EP90111870 A EP 90111870A EP 0404172 A3 EP0404172 A3 EP 0404172A3
Authority
EP
European Patent Office
Prior art keywords
contact
movable contact
arc
switching
opening
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.)
Withdrawn
Application number
EP19900111870
Other languages
German (de)
French (fr)
Other versions
EP0404172A2 (en
Inventor
Klaus-Peter Dr. Dipl.-Ing. Nachtigall
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.)
Eaton Industries GmbH
Original Assignee
Kloeckner Moeller GmbH
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 Kloeckner Moeller GmbH filed Critical Kloeckner Moeller GmbH
Publication of EP0404172A2 publication Critical patent/EP0404172A2/en
Publication of EP0404172A3 publication Critical patent/EP0404172A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H01H77/06—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 electromagnetic opening
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
    • H01H2001/545—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force having permanent magnets directly associated with the 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
    • 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
    • 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
    • H01H9/302—Means for extinguishing or preventing arc between current-carrying parts wherein arc-extinguishing gas is evolved from stationary parts
    • 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
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet

Abstract

Bei Hochleistungskontakten besteht das Problem, daß im Kurz­ schlußfalle die Kontakte nicht schnell genug voneinander ab­ heben und infolge des auftretenden Lichtbogens miteinander verschweißen. Es ist daher wichtig, daß beim Auftreten eines Kurzschlußstromes eine sehr schnelle Kontakttrennung zwischen dem festen und dem beweglichen Kontakt herbeigeführt wird mit Abkühlung und Verwirbelung des Lichtbogens zur schnellen Lichtbogenlöschung und Reduzierung der Durchlaßenergie. Dies wird dadurch erreicht, daß der bewegliche Kontakt (8) in einer rohrförmigen Hülse (11) aus einem elektrisch nicht lei­ tenden Material, vorzugsweise Polytetrafluoräthylen, mit min­ destens einer im Kontakt-Öffnungsweg befindlichen Ausblasöff­ nung (10) längsverschiebbar geführt ist, wobei der Schaltraum (13) zwischen dem am Boden der rohrförmigen Hülse (11) ange­ ordneten Festkontakt (7) und dem beweglichen Kontakt (8) nach außen derart abgedichtet ist, daß der im Kurzschlußfalle im Schaltraum (13) auftretende Schaltdruck den beweglichen Kontakt (8) wie einen Kolben in eine Öffnungsstellung treibt, in der sich der Schaltdruck durch eine Ausblasöffnung (10) abbauen kann. With high-performance contacts, there is the problem that, in the event of a short circuit, the contacts do not lift off from one another quickly enough and weld together as a result of the arc occurring. It is therefore important that when a short-circuit current occurs, a very quick contact separation between the fixed and the movable contact is brought about, with cooling and swirling of the arc for rapid arc extinguishing and reduction of the transmission energy. This is achieved in that the movable contact (8) in a tubular sleeve (11) made of an electrically non-conductive material, preferably polytetrafluoroethylene, with at least one in the contact opening path Ausblasöff opening (10) is guided longitudinally, the Switching space (13) between the fixed contact (7) arranged at the bottom of the tubular sleeve (11) and the movable contact (8) is sealed to the outside in such a way that the switching pressure occurring in the short circuit in the switching space (13) causes the moving contact (8) drives like a piston into an open position in which the switching pressure can be reduced through a blow-out opening (10).

EP19900111870 1989-06-23 1990-06-22 Heavy-duty contact, particularly for low tension switch gear Withdrawn EP0404172A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3920542 1989-06-23
DE19893920542 DE3920542A1 (en) 1989-06-23 1989-06-23 HIGH PERFORMANCE CONTACT, ESPECIALLY FOR LOW VOLTAGE SWITCHGEAR

Publications (2)

Publication Number Publication Date
EP0404172A2 EP0404172A2 (en) 1990-12-27
EP0404172A3 true EP0404172A3 (en) 1992-08-05

Family

ID=6383386

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900111870 Withdrawn EP0404172A3 (en) 1989-06-23 1990-06-22 Heavy-duty contact, particularly for low tension switch gear

Country Status (2)

Country Link
EP (1) EP0404172A3 (en)
DE (1) DE3920542A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4327357A1 (en) * 1993-08-14 1995-02-16 Abb Patent Gmbh Contact arrangement
EP0742099B1 (en) 1995-05-09 2000-03-22 Océ-Technologies B.V. Ink jet system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR726532A (en) * 1931-01-22 1932-05-30 Alsthom Cgee Improvements to oil switches specially applicable to high voltage electrical circuits
DE2349263A1 (en) * 1973-10-01 1975-04-03 Bbc Brown Boveri & Cie ELECTRIC SWITCH
DE2623634A1 (en) * 1976-05-26 1977-12-08 Driescher Spezialfab Fritz Compressed gas circuit breaker - has housing filled with non:ionisable gas, and movable contact sealed by sylphon bellows
DE3044836A1 (en) * 1980-10-31 1982-05-13 BBC Aktiengesellschaft Brown, Boveri & Cie., 5401 Baden, Aargau EXHAUST GAS SWITCH
EP0296896A1 (en) * 1987-06-18 1988-12-28 Merlin Gerin High pressure arc extinguishing chamber
DE3833564A1 (en) * 1987-11-24 1989-06-08 Bbc Brown Boveri & Cie Gas-blast circuit breaker

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR726532A (en) * 1931-01-22 1932-05-30 Alsthom Cgee Improvements to oil switches specially applicable to high voltage electrical circuits
DE2349263A1 (en) * 1973-10-01 1975-04-03 Bbc Brown Boveri & Cie ELECTRIC SWITCH
DE2623634A1 (en) * 1976-05-26 1977-12-08 Driescher Spezialfab Fritz Compressed gas circuit breaker - has housing filled with non:ionisable gas, and movable contact sealed by sylphon bellows
DE3044836A1 (en) * 1980-10-31 1982-05-13 BBC Aktiengesellschaft Brown, Boveri & Cie., 5401 Baden, Aargau EXHAUST GAS SWITCH
EP0296896A1 (en) * 1987-06-18 1988-12-28 Merlin Gerin High pressure arc extinguishing chamber
DE3833564A1 (en) * 1987-11-24 1989-06-08 Bbc Brown Boveri & Cie Gas-blast circuit breaker

Also Published As

Publication number Publication date
DE3920542A1 (en) 1991-01-10
EP0404172A2 (en) 1990-12-27

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