WO2003015114A1 - Disjoncteur a air - Google Patents

Disjoncteur a air Download PDF

Info

Publication number
WO2003015114A1
WO2003015114A1 PCT/JP2001/006644 JP0106644W WO03015114A1 WO 2003015114 A1 WO2003015114 A1 WO 2003015114A1 JP 0106644 W JP0106644 W JP 0106644W WO 03015114 A1 WO03015114 A1 WO 03015114A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
circuit breaker
air circuit
movable contact
contact
Prior art date
Application number
PCT/JP2001/006644
Other languages
English (en)
Japanese (ja)
Inventor
Junichi Kawakami
Hiroshi Okashita
Original Assignee
Mitsubishi Denki Kabushiki Kaisha
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 Denki Kabushiki Kaisha filed Critical Mitsubishi Denki Kabushiki Kaisha
Priority to ES01955554T priority Critical patent/ES2351204T3/es
Priority to DE60143410T priority patent/DE60143410D1/de
Priority to JP2002580697A priority patent/JP4599799B2/ja
Priority to KR10-2003-7004542A priority patent/KR100520928B1/ko
Priority to EP01955554A priority patent/EP1414057B1/fr
Priority to CNB01811461XA priority patent/CN1226764C/zh
Priority to PCT/JP2001/006644 priority patent/WO2003015114A1/fr
Priority to TW090119741A priority patent/TW517257B/zh
Publication of WO2003015114A1 publication Critical patent/WO2003015114A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • 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
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5822—Flexible connections between movable contact and terminal

Definitions

  • the present invention relates to a multi-pole air circuit breaker for interrupting an excessive current, and more particularly to securing a short-time conduction capacity at a switching contact portion.
  • FIG. 5 is a sectional side view of a main part of a conventional air circuit breaker disclosed in, for example, Japanese Patent Application Laid-Open No. 6-089650
  • FIG. 6 is a switching contact of the conventional air circuit breaker
  • FIG. 7 is a perspective view showing the arrangement of magnetic members provided around a switching contact of a conventional air circuit breaker.
  • 1 is an outer shell of an air circuit breaker
  • 2 is a switching mechanism including a well-known toggle link. Since such an air circuit breaker requires a large throwing force, the spring force stored in the closing spring 2d by the ratchet 2b and the eccentric cam 2c by the charge handle 2a or a motor (not shown) is used. It is to be thrown.
  • a contact arm 4 is connected to a lower link 2 e of the opening / closing mechanism 2 via a connecting pin 3, and the contact arm 4 is rotatably supported by a contact arm pin 5.
  • Reference numeral 6 denotes a movable contact.
  • a movable contact 6a is fixed to one end, and a flexible conductor 7 in which thin conductors are laminated is connected to the other end.
  • the end of the flexible conductor 7 is connected to the lower terminal 8, and the flexible conductor 7 is formed and arranged in a substantially U shape from the connection position of the lower terminal 8.
  • the movable contact pin 6c is inserted through the fulcrum hole 6b provided near the center of the movable contact 6 and the support hole of the connection arm 4 to move.
  • the contact 6 is swingably supported.
  • Reference numeral 9 denotes an upper terminal, which is provided at one end with a fixed contact 9a which comes into contact with and separates from the movable contact 6a.
  • Reference numeral 10 denotes a contact pressure panel that urges a connection portion with the movable contact 6 in a direction in which the U-shaped flexible conductor 7 is opened. This biasing force makes the movable contact 6 work clockwise in the drawing by using the movable contact pin 6c as a lever fulcrum, thereby bringing the movable contact 6a into contact with the fixed contact 9a.
  • 11 is an arc extinguishing device that eliminates the arc generated between the contacts when current is interrupted.
  • Reference numeral 12 denotes a magnetic plate disposed between the pole phases. The magnetic plate 12 is disposed so as to cover the U-shaped side of the flexible conductor 7, and enhances the electromagnetic force for suppressing the floating of the movable contact 6a when an excessive current described later is applied. It is a magnetic path.
  • the excessive fault current at the time of a load short circuit that such an air circuit breaker interrupts is three-phase alternating current, which passes through three poles simultaneously. For this reason, magnetic fluxes that are out of phase by 120 degrees simultaneously pass through the magnetic plates 12 disposed between the phases. For this reason, when the breaking current increases, the magnetic plate 12 is magnetically saturated in the in-phase region with the adjacent pole of the current, and the magnetic flux is canceled in the opposite-phase region, and the electromagnetic force (contact pressing force) that opens the U-shape of the flexible conductor 7 is obtained. Does not become larger than the increase in the current value, and the electromagnetic repulsive force between the fixed contact 9a and the movable contact 6a is superior, so that the contact is easily lifted.
  • the movable contact 6 is affected by the magnetic field of the adjacent pole and receives a lateral force due to the electromagnetic force with the self-pole current. This lateral force causes the movable contact 6a to move in the lateral direction, causing an arc between the movable contact 6a and the fixed contact 9a and causing a problem that the contact surface damage does not increase the current carrying capacity for a short time.
  • the present invention has been made to solve such a problem, and suppresses the influence of the magnetic flux of the adjacent pole even if the fault current increases, suppresses the floating of the fixed contact 9a and the movable contact 6a, and
  • the purpose of the present invention is to obtain an air circuit breaker with a high current carrying capacity for a short time by suppressing the lateral displacement of the contact and making it difficult for the contact surface to be ignited. Disclosure of the invention
  • An air circuit breaker is a flexible conductor formed by bending a movable contact having a movable contact among open / close contacts in an opening / closing direction so as to be capable of opening / closing and a substantially u-shape;
  • the lever shaft that converts the electromagnetic force in the direction of the U-shaped part into the pressing force of the movable contact and the magnetic plate that strengthens the electromagnetic force placed between the U-shaped side poles of the flexible conductor are arranged in parallel. It is made up of multiple sheets with magnetic gaps interposed between them.
  • the magnetic plate between the poles extends from the u-shaped side surface of the flexible conductor to the side of the switching contact.
  • a magnetic plate is inserted and arranged in an insertion groove formed with a gap corresponding to a magnetic gap in a phase gap wall that insulates and isolates a multipole switching contact.
  • the magnetic plate is divided into a U-shaped side arrangement of a flexible conductor and a magnetic shield plate of an open / close contact portion including a movable contact, and each of the provided insertion grooves is provided independently on the phase space wall.
  • each magnetic plate and each magnetic shielding plate are formed of a laminate of magnetic thin plates.
  • FIG. 1 is a vertical sectional view of a main part of an air circuit breaker according to Embodiment 1 of the present invention.
  • FIG. 2 is a diagram for explaining the mounting arrangement of the magnetic plate of the first embodiment on a box.
  • FIG. 3 is a diagram showing an arrangement of a magnetic plate provided around a switching contact portion according to a second embodiment.
  • FIG. 4 is a diagram showing an arrangement of a magnetic plate and a barrier material according to the third embodiment of the present invention.
  • FIG. 5 is a side sectional view of a main part of a conventional air circuit breaker.
  • FIG. 6 is a perspective view of a main part of a switching contact portion of a conventional air circuit breaker.
  • FIG. 7 is a diagram showing an arrangement of magnetic members provided around a switching contact portion of a conventional air circuit breaker.
  • FIG. 1 is a vertical sectional view of a main part of an air circuit breaker according to Embodiment 1 of the present invention
  • FIG. 2 is a diagram illustrating an arrangement of a magnetic plate of Embodiment 1 mounted on a box.
  • Reference numeral 13 denotes a magnetic plate, which is disposed on a U-shaped side of the flexible conductor 7.
  • This magnetic plate 13 is provided between each pole of the A magnetic air gap 13a is provided between the plates.
  • the magnetic plate 13 is a box formed of an insulating resin material that forms the outer shell 1 of the air circuit breaker. It can be mounted in place by inserting it into groove 1b.
  • the insertion groove 1b is provided at the center of the interphase wall 1a of the insulating resin material of the pace forming material so that a plurality of magnetic plates 13 can be mounted in parallel with securing the magnetic gap 13a. They are provided in parallel with each other.
  • the magnetic gap 13a separates the magnetic flux due to the current of the own pole and the magnetic flux due to the adjacent pole current, and there is a phase difference for each pole due to the multiple magnetic plates 13 Even with current, magnetic saturation and magnetic flux cancellation are reduced, so that the electromagnetic force (contact pressing force) that opens the U-shaped flexible conductor 7 tends to increase in proportion to the magnitude of the current. The floating of the contact due to the electromagnetic repulsion can be suppressed.
  • FIG. 3 is a diagram showing an arrangement of a magnetic plate provided around a switching contact portion according to a second embodiment.
  • Reference numeral 14 denotes a plurality of magnetic plates.
  • each magnetic plate 14 extends from the U-shaped side of the flexible conductor 7 to the side of the switching contact.
  • the plurality of magnetic plates 14 are mounted and arranged by inserting them into insertion grooves (not numbered) provided in parallel with the magnetic gaps 13a provided in the phase gap walls 1a.
  • the magnetic plate 1 4 Since the magnetic plate 14 shields the circulating magnetic flux caused by the current of the adjacent pole, the movable contact 6 is prevented from causing lateral displacement due to its own current and the electromagnetic force of the adjacent circulating magnetic flux.
  • the lateral displacement of the movable contact 6 can be suppressed, and further shortening can be achieved.
  • the time capacity can be increased.
  • FIG. 4 is a diagram showing an arrangement of a magnetic plate provided around the switching contact portion according to the third embodiment.
  • 1, 6 to 9 and 13 are the same as those in the first embodiment.
  • Reference numeral 15 denotes a magnetic shielding plate, which is provided between the respective pole phases on the side of the contact opening / closing portion of the movable contact 6 and the movable contact 6a and the fixed contact 9a separately from the magnetic plate 13.
  • a reinforcing portion 1c is provided between the magnetic plate 13 and the magnetic shield plate 15.
  • a long insertion groove extending from the U-shaped side of the flexible conductor 7 to the side of the contact opening / closing portion is provided in the phase interval wall 1a, and the magnetic plate 14 is inserted and arranged in this groove.
  • the strong electromagnetic force applied to the magnetic plate 14 may cause cracks in the side wall of the insertion groove, and as a countermeasure, increasing the thickness of the spacing wall 1a increases the volume of the air circuit breaker. Not desirable. Therefore, the magnetic plate 13 is divided so that the magnetic path is secured and the magnetic shielding plate 15 is provided with the function of shielding the adjacent poles.When the power is cut off, the current carrying capacity does not decrease for a short time.
  • the housing 1 integrally with the phase separation wall 1a is formed by molding an insulating resin into a molding die. Manufactured. The location of the reinforcing portion 1c is effective as a contact position of the pin for removing the box 1 from the molding die.
  • the magnetic shielding plate 15 is also a plurality of plates having the magnetic gap 13a, but the reinforcing plate 1c is provided from the aspect of securing the strength of the phase separation wall 1a, and the magnetic plate 13 is The configuration may be such that the number of the magnetic shielding plates 15 is one.
  • the magnetic flux due to the current of the own pole and the magnetic flux due to the current of the adjacent pole are separated by the magnetic air gap 13a, and have a phase difference for each pole.
  • the electromagnetic force (contact pressure) for opening the U-shaped flexible conductor 7 increases in proportion to the magnitude of the current, Suppresses contact lift due to electromagnetic repulsion between contacts.
  • the magnetic shielding plate 14 provided between the movable contact 6a and the fixed contact 9a at the contact opening / closing section is controlled by the current of the adjacent pole. This shields the orbiting magnetic flux and prevents the movable contact 6 from causing lateral displacement due to electromagnetic force with its own current.

Landscapes

  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

La présente invention concerne un disjoncteur à air dans lequel la capacité de conduction de courte durée est accrue par la suppression de décalage flottant et latéral d'un point de contact mobile (6a), et la temporisation de la génération d'arc à partir d'un point de contact. Le disjoncteur à air comporte un conducteur flexible (7) sensiblement de forme en U constitué par la flexion d'un contact mobile (6) comprenant le point de contact (6a) dans la direction de commutation de sorte que la commutation du contact mobile (6) puisse être effectuée par un arbre à bascule (6c) permettant la conversion d'une force électromagnétique dans la direction d'étalement au niveau de la partie en U du conducteur flexible (7) produite par un courant conducteur en une force de pression sur le point de contact mobile (6a), et une pluralité de tôles magnétiques (13) disposées en parallèle, à travers un entrefer magnétique (13a), entre les pôles des faces latérales en U du conducteur flexible afin d'accroître la force magnétique. La tôle magnétique entre chaque pôle peut être prolongée à partir de la face latérale un U vers la partie latérale du contact de commutation.
PCT/JP2001/006644 2001-08-02 2001-08-02 Disjoncteur a air WO2003015114A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
ES01955554T ES2351204T3 (es) 2001-08-02 2001-08-02 Disyuntor de circuito al aire.
DE60143410T DE60143410D1 (de) 2001-08-02 2001-08-02 Luftunterbrecherschalter
JP2002580697A JP4599799B2 (ja) 2001-08-02 2001-08-02 気中遮断器
KR10-2003-7004542A KR100520928B1 (ko) 2001-08-02 2001-08-02 기중차단기
EP01955554A EP1414057B1 (fr) 2001-08-02 2001-08-02 Disjoncteur a air
CNB01811461XA CN1226764C (zh) 2001-08-02 2001-08-02 空气断路器
PCT/JP2001/006644 WO2003015114A1 (fr) 2001-08-02 2001-08-02 Disjoncteur a air
TW090119741A TW517257B (en) 2001-08-02 2001-08-13 Air circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2001/006644 WO2003015114A1 (fr) 2001-08-02 2001-08-02 Disjoncteur a air

Publications (1)

Publication Number Publication Date
WO2003015114A1 true WO2003015114A1 (fr) 2003-02-20

Family

ID=11737615

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/006644 WO2003015114A1 (fr) 2001-08-02 2001-08-02 Disjoncteur a air

Country Status (8)

Country Link
EP (1) EP1414057B1 (fr)
JP (1) JP4599799B2 (fr)
KR (1) KR100520928B1 (fr)
CN (1) CN1226764C (fr)
DE (1) DE60143410D1 (fr)
ES (1) ES2351204T3 (fr)
TW (1) TW517257B (fr)
WO (1) WO2003015114A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2857779A1 (fr) * 2003-07-17 2005-01-21 Mitsubishi Electric Corp Disjoncteur multipolaire
EP1523020A1 (fr) * 2003-10-10 2005-04-13 Moeller GmbH Dispositif de commutation avec un contact rotatif à coupure simple

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4395134B2 (ja) * 2004-01-28 2010-01-06 三菱電機株式会社 遮断器
CN101223619B (zh) * 2005-07-21 2012-05-30 三菱电机株式会社 断路器
JP5020374B2 (ja) * 2008-04-04 2012-09-05 三菱電機株式会社 回路遮断器の短絡電流検出装置
FR2947667A1 (fr) * 2009-07-01 2011-01-07 Schneider Electric Ind Sas Asservissement via un dispositif de compensation magnetique des forces de repulsion et contacteur comprenant un tel dispositif
KR101168533B1 (ko) * 2011-03-14 2012-07-27 엘에스산전 주식회사 접지 스위치
CN112635263B (zh) * 2020-12-30 2022-09-13 滁州博杰科技有限公司 一种电磁辅助断路器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4891617A (en) * 1988-08-01 1990-01-02 Westinghouse Electric Corp. Rubber stops in outside poles
JPH0290426A (ja) * 1988-09-27 1990-03-29 Terasaki Denki Sangyo Kk 多極形電気開閉器
JPH0334234A (ja) * 1989-06-30 1991-02-14 Hitachi Ltd 回路遮断器
JPH0689650A (ja) * 1992-09-07 1994-03-29 Mitsubishi Electric Corp 遮断器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5925155U (ja) * 1982-08-07 1984-02-16 三菱電機株式会社 多極回路しや断器
JP2001101962A (ja) * 1999-09-29 2001-04-13 Mitsubishi Electric Corp 回路遮断器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4891617A (en) * 1988-08-01 1990-01-02 Westinghouse Electric Corp. Rubber stops in outside poles
JPH0290426A (ja) * 1988-09-27 1990-03-29 Terasaki Denki Sangyo Kk 多極形電気開閉器
JPH0334234A (ja) * 1989-06-30 1991-02-14 Hitachi Ltd 回路遮断器
JPH0689650A (ja) * 1992-09-07 1994-03-29 Mitsubishi Electric Corp 遮断器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1414057A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2857779A1 (fr) * 2003-07-17 2005-01-21 Mitsubishi Electric Corp Disjoncteur multipolaire
EP1523020A1 (fr) * 2003-10-10 2005-04-13 Moeller GmbH Dispositif de commutation avec un contact rotatif à coupure simple

Also Published As

Publication number Publication date
TW517257B (en) 2003-01-11
JPWO2003015114A1 (ja) 2004-12-02
DE60143410D1 (de) 2010-12-16
EP1414057A4 (fr) 2005-03-16
EP1414057A1 (fr) 2004-04-28
ES2351204T3 (es) 2011-02-01
EP1414057B1 (fr) 2010-11-03
JP4599799B2 (ja) 2010-12-15
KR20030055272A (ko) 2003-07-02
CN1441956A (zh) 2003-09-10
CN1226764C (zh) 2005-11-09
KR100520928B1 (ko) 2005-10-17

Similar Documents

Publication Publication Date Title
JP5074605B2 (ja) 限流型配線用遮断器の可動接触子アセンブリ
KR100320030B1 (ko) 스타-델타 결선용 전자개폐기
JP6103489B2 (ja) 直流開閉器の消弧機構、および当該消弧機構を有する直流開閉器並びに直流遮断器
CN101421812B (zh) 槽式马达和包含槽式马达的断路器
EP0067321B1 (fr) Dispositif interrupteur à charge
WO2003015114A1 (fr) Disjoncteur a air
JP4360013B2 (ja) 回路遮断器
US5864453A (en) Apparatus for interrupting electrical power between two conductors
KR101232453B1 (ko) 회로차단기
US7439469B2 (en) Electric switching device comprising an arc-quenching unit
US6005207A (en) Multi-part circuit breaker housing
KR100197051B1 (ko) 회로차단기
JP3997664B2 (ja) 回路しゃ断器
KR100966995B1 (ko) 배선용 차단기
JP3756973B2 (ja) 回路遮断器
KR200462420Y1 (ko) 소형 배선용 차단기의 아크 소호 장치
KR100574423B1 (ko) 압트립 장치를 구비하는 배선용 차단기
JP5260457B2 (ja) 回路遮断器
JP3228002B2 (ja) 回路遮断器
WO2005073994A1 (fr) Rupteur
JP4647821B2 (ja) 漏電遮断器
JP4419602B2 (ja) 回路遮断器
JPH0230129B2 (ja) Denryokukaiheisochi
JPS63252328A (ja) 開閉器
IE892173L (en) Crossbar assembly

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 2002580697

Country of ref document: JP

Kind code of ref document: A

Format of ref document f/p: F

WWE Wipo information: entry into national phase

Ref document number: 2001955554

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 01811461X

Country of ref document: CN

AK Designated states

Kind code of ref document: A1

Designated state(s): CN JP KR

Kind code of ref document: A1

Designated state(s): CN JP

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB IE IT LU MC NL PT SE TR

WWE Wipo information: entry into national phase

Ref document number: 1020037004542

Country of ref document: KR

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWP Wipo information: published in national office

Ref document number: 1020037004542

Country of ref document: KR

WWP Wipo information: published in national office

Ref document number: 2001955554

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 1020037004542

Country of ref document: KR