EP0237623B1 - Ausschalter - Google Patents

Ausschalter Download PDF

Info

Publication number
EP0237623B1
EP0237623B1 EP86115278A EP86115278A EP0237623B1 EP 0237623 B1 EP0237623 B1 EP 0237623B1 EP 86115278 A EP86115278 A EP 86115278A EP 86115278 A EP86115278 A EP 86115278A EP 0237623 B1 EP0237623 B1 EP 0237623B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
arc
contactor
contactors
contacts
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 - Lifetime
Application number
EP86115278A
Other languages
English (en)
French (fr)
Other versions
EP0237623A1 (de
Inventor
Shinji Yamagata
Fumiyuki Hisatsune
Junichi Terachi
Hajimu Yoshiyasu
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
Priority claimed from JP3555681U external-priority patent/JPS57147552U/ja
Priority claimed from JP3555581U external-priority patent/JPS57147551U/ja
Priority claimed from JP3555781U external-priority patent/JPS57147553U/ja
Priority claimed from JP1981035554U external-priority patent/JPH0218516Y2/ja
Priority claimed from JP3555281U external-priority patent/JPS57147548U/ja
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to EP86115278A priority Critical patent/EP0237623B1/de
Publication of EP0237623A1 publication Critical patent/EP0237623A1/de
Application granted granted Critical
Publication of EP0237623B1 publication Critical patent/EP0237623B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01H77/10—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
    • H01H77/102—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 special mounting of contact arm, allowing blow-off movement
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/18—Means for extinguishing or suppressing arc
    • 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

Definitions

  • the present invention relates to a circuit breaker according to the preamble of claim 1.
  • Fig. 1 shows an embodiment of the circuit breaker according of this invention, in which an enclosure 1 forming the outer frame of a switching device is made of an insulator and is provided with an exhaust port 101.
  • a first contactor 2 is constructed of a first rigid conductor 201, which is turnably supported by a pivot pin 2b on a holder 2a that is fixed to the enclosure 1, and a first contact 202 which is mounted on one end part of the first rigid conductor 201.
  • the first rigid conductor 201 is connected to a connection terminal 204 through a flexible conductor 203.
  • a second contactor 3 moves relative to the first contactor 2 in order to close or open the circuit breaker, and it comprises a second rigid conductor 301 which is operated relative to the first rigid conductor 201 so as to close or open the circuit breaker, and a second contact 302 which is mounted on one end part of the second rigid conductor 301 in a manner to confront the first contact 202.
  • the second rigid conductor 301 is connected to an external conductor (not shown) through a flexible conductor 303, while the other end part thereof is turnably held by a pivot pin 305 on a holder 304 that is fixed to the enclosure 1.
  • a spring 2A being interposed between the first rigid conductor 201 and the enclosure 1 urges the first contact 202 against the second contact 302.
  • An operating mechanism 4 for operating the second contactor 3 so as to close or open the circuit breaker is formed so that one end part of a lower link 401 constituting a linkage is turnably coupled to the second rigid conductor 301 by a pivot pin 402, that one end part of an upper link 403 is turnably coupled to the other end part of the lower link 401 by a pivot pin 404, and that an operating handle 405 is turnably coupled to the other end part of the upper link 403 by a pivot pin (not shown).
  • Arc extinguishing plates 5 extinguish an electric arc struck when the second contact 302 is separated from the first contact 202, and they are supported by a pair of side plates 501 and 502.
  • Arc shields 6 and 7 made of high resistivity material are respectively mounted on the first and second rigid conductors 201 and 301 in a manner to have the first and second contacts 202 and 302 projecting therethrough and to oppose to the electric arc.
  • the operating handle 405 When the operating handle 405 is turned clockwise, the first and second contacts 202 and 302 are engaged as illustrated in Fig. 3.
  • a high current such as short-circuit current flows
  • the first and second rigid conductors 201 and 301 are electromagnetically repelled on account of parallel currents which flow through these rigid conductors in senses opposite to each other, and the first rigid conductor 201 is separated as shown in Fig. 4, so that the electric arc A develops across the first and second contacts 202 and 302.
  • the operating mechanism 4 works to completely separate the second rigid conductor 301.
  • metal particles are reflected by the arc shields 6 and 7 to render the pressure of the arc space high, with the result that the arc is effectively cooled and extinguished.
  • the first rigid conductor 201 it turnably held on the holder 2a by the pivot pin 2b. Therefore, when the high current, such as a short-circuit current flows, the first and second rigid conductors 201 and 202 are electromagnetically repelled by the currents flowing therethrough, without waiting for the operation of the operating mechanism 4, so that the first rigid conductor 201 is separated to generate the arc A.
  • the high current such as a short-circuit current
  • the pressure of the space Q between the arc shields 6 and 7 becomes very high, and hence, the first and second rigid conductors 201 and 301 can be separated at very high speed by the effect of the arc shields 6 and 7 in addition to the electromagnetic repellent force, so that the arc voltage starts rising very quickly and rises very greatly. Accordingly, the peak value of the current to flow through the circuit can be made very small, the arc voltage can be made remarkably higher than in the prior circuit breaker, and a very high current-limiting performance can be attained.
  • Fig. 5 is a perspective view showing an arc shield, which is provided with a groove or arc runway 701 extending from the second contact 302 toward the arc extinguishing plates 5, so as to expose the second movable rigid conductor 301.
  • the arc A runs toward the arc extinguishing plates 5 within this groove, to become effectively extinguished in direct contact with the arc extinguishing plates 5.
  • the circuit breaker of this invention is formed in such a way that, except for a part of the electrically contacting surface of either contact of the circuit breaker, the part of a rigid conductor adjacent to the contact as projects to the surrounding space is concealed behind an arc shield (a plate-shaped pressure reflector or a covering such as taping and coating) which is made of a substance of a highly resistive material (called the "high resistivity material” hereinbelow) having a resistivity higher than that of a material forming the rigid conductor, thereby to forcibly inject metal particles into an arc space, and that the electrodes are separated at high speed by a high pressure established owing to the provision of the arc shield.
  • an arc shield a plate-shaped pressure reflector or a covering such as taping and coating
  • high resistivity material there can be used, for example, an organic or inorganic insulator, or a high resistivity metal such as copper-nickel, copper-manganese, manganin, iron-carbon, iron-nickel and iron-chromium. It is also possible to use iron whose resistance increases abruptly in accordance with a temperature rise.
  • the circuit breaker of the present embodiment can prevent the polarity effect on the current-limiting performance from becoming different depending upon whether the polarity on the contact to be separated by the electromagnetic repellence is a cathode or an anode and it can stabilize the current-limiting performance. That is, such beneficial result is achieved by the measure that both the first rigid conductor 201 and the second rigid conductor 301 on which the first contact 202 and the second contact 302 are respectively mounted are formed of the turnable electromagnetic repulsion type.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (4)

  1. Ausschalter mit einem Betätigungsmechanismus (4), mit welchem ein elektrischer Stromkreis durch Schließen oder Öffnen eines Paares von Kontakten (202, 302) geschlossen bzw. geöffnet wird, wobei diese Kontakte (202, 302) auf einem starren stromleitenden Element (201, 301) von Kontaktarmen (2, 3) befestigt sind, wobei diese Kontaktarme (2, 3) schwenkbar gelagert sind, um hin oder weg von dem gegenüberliegenden Kontakt (202, 302) bewegbar zu sein, wobei der erste Kontaktarm (3) schwenkbar an dem Gehäuse (1) des Ausschalters befestigt ist und zusätzlich schwenkbar mit dem Betätigungsmechanismus (4) verbunden ist, während der zweite Kontaktarm (2) ebenfalls schwenkbar an dem Gehäuse (1) befestigt ist und zusätzlich eine Feder (2A) aufweist, welche diesen Kontaktarm (2) in Richtung des ersten Kontaktarms (3) drückt,und wobei diese Kontaktarme (2, 3) derart in Bezug aufeinander in einer parallelen und symmetrischen Weise angeordnet sind, daß in dem geschlossenen Zustand eine Stromschleife gebildet ist,
    dadurch gekennzeichnet, daß an diesen Kontaktarmen (2, 3) Lichtbogenschilde (6, 7) derart befestigt sind, daß von denselben die entsprechenden Kontakte (202, 302) umgeben werden, ferner daß die Lichtbogenschilde (6, 7) aus einem Material hohen elektrischen Widerstandes hergestellt sind, und daß wenigstens einer dieser Lichtbogenschilde (6, 7) mit einem Lichtbogenpfad (701) versehen ist, welcher sich von dem entsprechenden Kontakt (202, 302) in Richtung von Lichtbogenlöschplatten (5) erstreckt, wodurch das starre leitfähige Element (201, 301) des betreffenden Kontaktarmes (2, 3) freigelegt ist.
  2. Ausschalter nach Anspruch 1, dadurch gekennzeichnet, daß die Kontaktarme (2, 3) über biegsame Leiter (203, 303) an äußeren Anschlußklemmen, beispielsweise (204),angeschlossen sind.
  3. Ausschalter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Material der Lichtbogenschilde (6, 7) ein organischer oder inorganischer Isolator ist.
  4. Ausschalter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Material der Lichtbogenschilde (6, 7) ein Metall hohen elektrischen Widerstandes, beispielsweise Kupfer-Nickel, Kupfer-Mangan, Manganin, Eisen-Kohlenstoff, Eisen-Nickel, Eisen-Chrom oder Eisen ist.
EP86115278A 1981-03-12 1982-03-12 Ausschalter Expired - Lifetime EP0237623B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP86115278A EP0237623B1 (de) 1981-03-12 1982-03-12 Ausschalter

Applications Claiming Priority (11)

Application Number Priority Date Filing Date Title
JP3555681U JPS57147552U (de) 1981-03-12 1981-03-12
JP35557/81U 1981-03-12
JP3555581U JPS57147551U (de) 1981-03-12 1981-03-12
JP3555781U JPS57147553U (de) 1981-03-12 1981-03-12
JP35556/81U 1981-03-12
JP1981035554U JPH0218516Y2 (de) 1981-03-12 1981-03-12
JP35555/81U 1981-03-12
JP3555281U JPS57147548U (de) 1981-03-12 1981-03-12
JP35554/81U 1981-03-12
JP35552/81U 1981-03-12
EP86115278A EP0237623B1 (de) 1981-03-12 1982-03-12 Ausschalter

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP82102015.3 Division 1982-03-12

Publications (2)

Publication Number Publication Date
EP0237623A1 EP0237623A1 (de) 1987-09-23
EP0237623B1 true EP0237623B1 (de) 1991-08-28

Family

ID=27545383

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86115278A Expired - Lifetime EP0237623B1 (de) 1981-03-12 1982-03-12 Ausschalter

Country Status (1)

Country Link
EP (1) EP0237623B1 (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE944566C (de) * 1951-02-08 1956-06-21 Starkstrom Schaltgeraetefabrik Lichtbogenloescheinrichtung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3402273A (en) * 1965-12-01 1968-09-17 Ite Circuit Breaker Ltd Arc chamber for circuit breakers
DE1765050B2 (de) * 1968-03-26 1976-08-05 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt Elektrische kontakt- oder elektrodenanordnung zur ortsfesten stabilisierung der lichtbogenfusspunkte und zur verringerung der abbrandverluste
US3997746A (en) * 1974-04-23 1976-12-14 Airpax Electronics, Incorporated Circuit breaker with arc chamber screen
JPS5848979B2 (ja) * 1978-08-10 1983-11-01 富士電機株式会社 回路しや断器
US4409445A (en) * 1980-12-09 1983-10-11 Mitsubishi Denki Kabushiki Kaisha Circuit breaker

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE944566C (de) * 1951-02-08 1956-06-21 Starkstrom Schaltgeraetefabrik Lichtbogenloescheinrichtung

Also Published As

Publication number Publication date
EP0237623A1 (de) 1987-09-23

Similar Documents

Publication Publication Date Title
US4654491A (en) Circuit breaker with contact support and arc runner
JPS6243027A (ja) 回路遮断器
US4654490A (en) Reverse loop circuit breaker with high impedance stationary conductor
CA1085437A (en) Circuit breaker having improved line strap construction
EP0059476B1 (de) Ausschalter
US2590543A (en) Spaced plate circuit interrupter
JPH02119018A (ja) 回路遮断器
EP0070413B2 (de) Schutzschalter mit Vorrichtung zum Einschränken eines Lichtbogens
US4484045A (en) Molded case circuit breaker having improved arc resistant properties
EP0288040B1 (de) Schutzschalter
EP0237623B1 (de) Ausschalter
EP0054833B1 (de) Vorrichtung zum Einschränken eines Lichtbogens in einem Schutzschalter
EP0059475B1 (de) Strombegrenzer
EP0059455B2 (de) Vorrichtung zum Einschränken eines Lichtbogens in einem Schutzschalter
EP0233323B1 (de) Ausschalter
US2824934A (en) Visible-blade arc-extinguishing disconnecting switch
EP0233322B1 (de) Ausschalter
EP0061097B1 (de) Schalter
EP0232473B1 (de) Ausschalter
JPH0472327B2 (de)
EP0061006B2 (de) Vorrichtung zum Einschränken eines Lichtbogens in einem Schalter
US4656324A (en) Current limiting circuit interrupter
KR880001790Y1 (ko) 회로차단기
JPS645339Y2 (de)
EP0057452A2 (de) Vorrichtung zum Einschränken eines Lichtbogens in einem Schutzschalter

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AC Divisional application: reference to earlier application

Ref document number: 61097

Country of ref document: EP

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR GB IT LI

17P Request for examination filed

Effective date: 19880226

17Q First examination report despatched

Effective date: 19900410

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AC Divisional application: reference to earlier application

Ref document number: 61097

Country of ref document: EP

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

REF Corresponds to:

Ref document number: 3280353

Country of ref document: DE

Date of ref document: 19911002

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19950315

Year of fee payment: 14

REG Reference to a national code

Ref country code: GB

Ref legal event code: 746

Effective date: 19951026

REG Reference to a national code

Ref country code: FR

Ref legal event code: D6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19960331

Ref country code: CH

Effective date: 19960331

ITPR It: changes in ownership of a european patent

Owner name: OFFERTA DI LICENZA AL PUBBLICO

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19990309

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19990311

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19990319

Year of fee payment: 18

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000312

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20000312

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001130

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010103