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EP0206249B1 - Ausschalter - Google Patents

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Publication number
EP0206249B1
EP0206249B1 EP86108334A EP86108334A EP0206249B1 EP 0206249 B1 EP0206249 B1 EP 0206249B1 EP 86108334 A EP86108334 A EP 86108334A EP 86108334 A EP86108334 A EP 86108334A EP 0206249 B1 EP0206249 B1 EP 0206249B1
Authority
EP
European Patent Office
Prior art keywords
fixed
moving
conductor
contact point
pressure reflector
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
EP86108334A
Other languages
English (en)
French (fr)
Other versions
EP0206249A2 (de
EP0206249A3 (en
Inventor
Shinji Mitsubishi Denki K.K. Yamagata
Takuo Mitsubishi Denki K.K. Takatsuka
Hitoshi Mitsubishi Denki K.K. Sato
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
Priority claimed from JP60098135A external-priority patent/JPS60246357A/ja
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP0206249A2 publication Critical patent/EP0206249A2/de
Publication of EP0206249A3 publication Critical patent/EP0206249A3/en
Application granted granted Critical
Publication of EP0206249B1 publication Critical patent/EP0206249B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • 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
    • H01H2009/305—Means for extinguishing or preventing arc between current-carrying parts including means for screening for arc gases as protection of mechanism against hot arc gases or for keeping arc gases in the arc chamber
    • 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
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns

Definitions

  • the present invention relates generally to a circuit breaker, and particularly concerns a circuit breaker for a power line which is of a type comprising an insulation barrier for isolation between power source side and load side, and is improved for prevention of undesirable decrease of insulation characteristic due to deposition of fine granules of conductive substance around the insulation structure around fixed contact and fixed conductor.
  • FIG.3 and FIG.4 A typical example of the conventional circuit breaker (see for example US-A- 3,599,130, figure 1) having pressure reflectors both for a fixed contact and a moving contact is shown in FIG.3 and FIG.4.
  • a fixed contact 1 of power source side comprises a fixed conductor 1a and a fixed contact point 1b which is provided on end tip part of the fixed conductor 1a.
  • An arc runner 2 which is made of a metal is provided at a vicinity of the fixed contact point 1b.
  • a fixed pressure reflector 3 which is usually made of an insulative material, such as phenol resin or PBA (polybuthylenetelephtalate) resin or a high resistivity substance (e.g. tungsten-containing metal) which has a higher specific resistance than the fixed conductor 1a is provided to surround the fixed contact point 1b and also to cover the fixed conductor 1a.
  • a moving contact 4 comprises a moving conductor 4a and a moving contact point 4b connected to a near end part of the moving conductor 4a.
  • the other end of the moving contact 4 is connected to a known moving mechanism for making circuit breaking operation and circuit interrupting operation.
  • a known moving mechanism for making circuit breaking operation and circuit interrupting operation.
  • Such known mechanism is disclosed in detail, for instance, in the United States Patent No. 3,599,130. Since the mechnism and operation of the moving contact 4 is not the gist of the present invention, the detailed description of the moving mechanism is omitted.
  • a moving pressure reflector 5 is provided so as to surround the moving contact point 4b, and also to cover the moving conductor 4a.
  • the moving pressure reflector 5 is made of an insulative substance or a high resistance substance which has higher specific resistance than the moving conductor 4a.
  • An insulation barrier 6 is disposed on the fixed pressure reflector 3, so as to isolate a space P of power source side wherein the fixed contact 1 and a known arc extinguisher 7 are disposed from a space L of load side wherein moving mechanism of the moving contact 4 is disposed.
  • the insulative barrier 6 is made of, for instance, a glass-fiber-reinforced polyesther, or the like, insulative sheet and has a vertically oblong hole 6b wherein the moving contact 4 moves. Furthermore, the insulation barrier 6 has, at its lower foot part or base, an indent 6a in which the fixed pressure reflector 3 is to be inserted when a circuit breaker is assembled. By such configuration, the insulation barrier 6 separates the power source side space P in the right side of FIG.3 and the load side space L in the left side thereof.
  • the present invention is made to solve the above-mentioned problem of the prior art circuit breaker, by providing a circuit breaker which is capable of improving insulation characteristic between the power source side space and load side space by preventing breakdown of the insulation due to deposition of powder or fine granule of conductive substance on the surface of the fixed pressure reflector.
  • the above-mentioned object is accomplished by providing at least one oblong protrusion on the surface of the fixed pressure reflector in a manner to be parallel along or at the vicinity of the foot part of an insulation barrier provided on the fixed pressure reflector.
  • a circuit breaker in accordance with the present invention comprises a fixed contact, having a fixed conductor and a fixed contact point disposed at one end part of the fixed conductor, a fixed pressure reflector disposed to surround the fixed contact point and to cover the fixed conductor, a moving contact having a moving conductor and a moving contact point disposed at one end part of the moving conductor, a moving pressure reflector disposed to surround the moving contact point and to cover the moving conductor, an insulation barrier disposed above the fixed pressure reflector to isolate power source side space and load side space, wherein the improvement is that the fixed pressure reflector has at least one oblong protrusion provided protruding parallelly along the foot part of the insulation barrier.
  • FIG.1 is a partly sectional side view of a principal part of a circuit breaker embodying the present invention.
  • FIG.2 is a perspective view showing a principal part of the embodiment of FIG.1.
  • FIG.3 is the partly sectional view of the conventional circuit breaker.
  • FIG.4 is the perspective view of the conventional circuit breaker of FIG.3.
  • FIG.1 and FIG.2 A preferred embodiment of the present invention is shown in FIG.1 and FIG.2.
  • a fixed contact 1 of power source side comprises a fixed conductor 1a and a fixed contact point 1b which is provided on end tip part of the fixed conductor 1a.
  • An arc runner 2 which is made of a metal is provided at a vicinity of the fixed contact point 1b.
  • the fixed pressure reflector 3 is provided with at least one oblong protrusion. In the embodiment of FIG.1, two oblong protrusions are provided.
  • An insulation barrier 6 is provided above the fixed pressure reflector 3, in a manner to isolate a space P of power source side wherein the fixed contact 1, the fixed contact point 1b and a moving contact point 4b and a known arc extinguisher 7 are disposed from a space L of load side wherein moving mechanism for a moving contact 4 is disposed.
  • the insulative barrier 6 is made of, for instance, a glass fiber-reinforced polyesther, or similar insulative sheet and has a vertically oblong hole 6b wherein the moving contact 4 moves. Furthermore, the insulation barrier 6 has, at its lower foot part or base 6c, an indent 6a in which the fixed pressure reflector 3 is to be inserted when a circuit breaker is assembled.
  • the two oblong protrusions 8a and 8b are provided substantially in parallel with the foot part 6c of the insulation barrier which is mounted on the fixed pressure reflector 3 at the part of the indent 6a. Therefore, the foot part 6c of the insulation barrier 6 is easily disposed between the two oblong protrusions 8a and 8b.
  • the moving contact 4 comprises a moving conductor 4a and the moving contact point 4b connected to a near end part of the moving conductor 4a.
  • the other end of the moving contact 4 is connected to a known moving mechanism for making circuit breaking operation and circuit interruption operation. Since the mechanism is known and not the gist of the present invention, description and illustration of the details thereof are omitted.
  • a moving pressure reflector 5 is provided so as to surround the moving contact point 4b and also to cover the moving conductor 4a.
  • the moving pressure reflector 5 is made of an insulative substance or a high resistance substance which has higher specific resistance than the moving conductor 4a.
  • the embodiment shows provision of two oblong protrusions 8a and 8b
  • the gist of the invention is not limited thereto. That is, provision of only one oblong protrusion is still effective in improving the insulation characteristic to a considerable extent.

Landscapes

  • Breakers (AREA)

Claims (3)

  1. Trennschalter umfassend:

    einen festen Kontakt (1) mit einem festen Leiter (1a) und einer festen Kontaktstelle (1b), welche an einem Endteil des festen Leiters angeordnet ist,

    einen festen Druckreflektor (3), der so angeordnet ist, daß er die feste Kontaktstelle (1b) umgibt und den festen Leiter (1a) abdeckt,

    einen beweglichen Kontakt (4) mit einem damit bewegbaren Leiter (4a) und einer bewegbaren Kontaktstelle (4b), die an dem einen Endteil des bewegten Leiters angeordnet ist,

    einen bewegbaren Druckreflektor (5), der so angeordnet ist, daß die bewegbare Kontaktstelle (4b) umgeben wird und den bewegten Kontakt (4a) abdeckt, und

    eine Isolationsbarriere (6), die eine Basisstelle (6c) aufweist, welche an dem festen Druckreflektor (3) befestigt ist, um den Raum der energieführenden Seite (P) und den Raum der lastführenden Seite (L) voneinander zu isolieren,

    dadurch gekennzeichnet,

    daß der feste Druckreflektor (3) mindestens einen länglichen Vorsprung (8) aufweist, der parallel erstreckt zu der Basis (6c) entlang der gesamten Breite des feststehenden Druckreflektors (3) vorgesehen ist.
  2. Trennschalter nach Anspruch 1, bei welchem ein Paar dieser länglichen Vorsprünge (8a, 8b) im wesentlichen parallel auf beiden Seiten des Fußteils (6c) der Isolationsbarriere (6) angeordnet sind.
  3. Trennungsschalter nach Anspruch 1 oder 2, bei welchem die Isolationsbarriere (6) ein längliches Loch (6b) aufweist, in welchem der bewegte Leiter (4a) in dessen Längsrichtung zum Öffnen und Schließen der bewegten Kontaktstelle mit der festen Kontaktstelle bewegt wird, und mit einer Einkerbung (6a), in welche der feste Druckreflektor eingesetzt wird.
EP86108334A 1985-05-10 1986-06-19 Ausschalter Expired - Lifetime EP0206249B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP60098135A JPS60246357A (ja) 1984-05-10 1985-05-10 電荷移動用両水性有機錯体、導電体または導電体の前駆体
JP98135/85 1985-06-25

Publications (3)

Publication Number Publication Date
EP0206249A2 EP0206249A2 (de) 1986-12-30
EP0206249A3 EP0206249A3 (en) 1988-01-20
EP0206249B1 true EP0206249B1 (de) 1991-09-11

Family

ID=14211795

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86108334A Expired - Lifetime EP0206249B1 (de) 1985-05-10 1986-06-19 Ausschalter

Country Status (1)

Country Link
EP (1) EP0206249B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1264164B1 (it) * 1993-04-21 1996-09-17 Sace Spa Interruttore di bassa tensione in scatola isolante
US5581063A (en) * 1995-06-26 1996-12-03 Square D Company Arc-resistant shield for protecting a movable contact carrier of a circuit breaker
US5899323A (en) * 1998-05-07 1999-05-04 Eaton Corporation Electrical switching apparatus with contact finger guide
US7863537B2 (en) * 2007-10-09 2011-01-04 Eaton Corporation Gassing insulator assembly, and conductor assembly and electrical switching apparatus employing the same
US9401251B2 (en) * 2012-05-16 2016-07-26 General Electric Company Molded case circuit breaker

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS492468B1 (de) * 1968-07-15 1974-01-21
US3997746A (en) * 1974-04-23 1976-12-14 Airpax Electronics, Incorporated Circuit breaker with arc chamber screen
JPS5830254U (ja) * 1981-08-24 1983-02-26 三菱電機株式会社 回路しや断器
US4581511A (en) * 1984-09-28 1986-04-08 Westinghouse Electric Corp. Molded case circuit breaker with an improved internal venting system

Also Published As

Publication number Publication date
EP0206249A2 (de) 1986-12-30
EP0206249A3 (en) 1988-01-20

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