WO2003071566A1 - Disjoncteur a air - Google Patents

Disjoncteur a air Download PDF

Info

Publication number
WO2003071566A1
WO2003071566A1 PCT/JP2002/001623 JP0201623W WO03071566A1 WO 2003071566 A1 WO2003071566 A1 WO 2003071566A1 JP 0201623 W JP0201623 W JP 0201623W WO 03071566 A1 WO03071566 A1 WO 03071566A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact
fixed
movable
arc
side arc
Prior art date
Application number
PCT/JP2002/001623
Other languages
English (en)
Japanese (ja)
Inventor
Hiroshi Okashita
Junichi Kawakami
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 JP2003570376A priority Critical patent/JP4030504B2/ja
Priority to EP02700721A priority patent/EP1492138B1/fr
Priority to DE60236214T priority patent/DE60236214D1/de
Priority to KR10-2003-7008040A priority patent/KR100496596B1/ko
Priority to CNB028045343A priority patent/CN1215511C/zh
Priority to PCT/JP2002/001623 priority patent/WO2003071566A1/fr
Priority to ES02700721T priority patent/ES2342047T3/es
Priority to TW091103819A priority patent/TW556240B/zh
Publication of WO2003071566A1 publication Critical patent/WO2003071566A1/fr

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
    • H01H9/42—Impedances connected with contacts
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • 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
    • 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

Definitions

  • the present invention relates to an improvement in a switching contact of an air circuit breaker.
  • FIG. 4 is a side sectional view of a conventional air circuit breaker described in, for example, Japanese Patent Application Laid-Open No. 2-904424.
  • 1 is a housing formed of an insulating material
  • 2 is a fixed conductor arranged in parallel with several poles on the housing 1
  • a fixed contact 3 is fixed at one end, and the other end is outside the back of the housing 1.
  • Reference numeral 4 denotes a fixed-side arc conductor extending from the fixed conductor 2 in the direction of the arc extinguishing device described later
  • reference numeral 5 denotes a fixed-side arc contact fixed to the tip of the fixed-side arc conductor 4.
  • Reference numeral 6 denotes a movable contact opposed to and separated from the fixed contact 3
  • reference numeral 7 denotes a movable element having the movable contact 6 fixed thereto
  • reference numeral 8 denotes a movable arc conductor obtained by extending the movable element 7 toward the arc extinguishing device
  • reference numeral 9 denotes a movable arc conductor. Denotes a movable arc contact fixed to the tip of the movable arc conductor 8.
  • Reference numeral 10 denotes a contact arm that rotatably holds the mover 7, 11 denotes a contact arm; and a contact arm shaft that supports L 0 on the housing 1.
  • Reference numeral 12 denotes a terminal conductor, which is fixed to the housing 1 and led out to the outside of the housing 1 to form the power supply terminal 12.
  • a flexible conductor 13 movably connects the mover 7 to the terminal conductor 12.
  • 14 is a contact pressure spring that urges the mover 7 in the opening direction
  • 15 is an opening / closing mechanism
  • 16 is the axis of rotation of the mover 7
  • 17 is an arc extinguishing device
  • 18 is a trip This is the Leh club.
  • the opening / closing mechanism 15 is composed of a well-known todar link mechanism, and opens / closes the mover 7 to turn on / off the air circuit breaker.
  • the latch In the ON state, the latch is locked by a latch (not shown) that engages with the trip relay section 18 to maintain the ON state. It turns off when the latch is disengaged.
  • Reference numeral 19 denotes a closing panel on which the closing drive force of the opening / closing mechanism 15 is stored, and 20 denotes a cam mechanism for compressing and storing the closing spring 19 by the handle 21 or a motor (not shown).
  • Such an air circuit breaker detects an overcurrent or an excessive current due to an accident or the like in the connected load, and trips the relay 18 to release the latch and activates the switching mechanism 15 Then, the contact arm 10 is pushed up around the contact arm shaft 11 by the force of the contact pressure panel 14, and the mover 7 is rotated counterclockwise around the shaft 16, The fixed contact 3 and the movable contact 6 are separated to cut off the current between both contacts.
  • the mover 7 connected to the opening / closing mechanism 15 is on.
  • the contact arm 10, the axis 16, and the contact arm axis 11 are in a positional relationship so as to swing when off. The swing operation of the mover 7 will be described.
  • the movable contact 6 and the fixed contact 3 are in contact with each other, but the movable arc contact 9 and the fixed arc contact 5 are separated.
  • the movable contact 6 is slightly separated from the fixed contact 3 as the contact arm 10 of the opening / closing mechanism 15 is pulled up, and electric current is applied between the two contacts by an arc.
  • the mover 7 is rotated clockwise about the shaft 16 by the pressing force of the contact pressure panel 14, and the movable-side arc contact 9 contacts the fixed-side arc contact 5.
  • the movable contact 6 and the fixed contact 3 are large with the movable arc contact 9 and the fixed arc contact 5 in contact with the movable arc contact 9 and the fixed arc contact 5 by the lifting operation of the opening / closing mechanism 15, and the arc between the contacts is pulled.
  • the main part of the current is transferred to the movable arc contact 9 and the fixed arc contact 5.
  • the movable element 7 is rotated counterclockwise by the operation of the opening / closing mechanism 15 and the movable arc contact is 9 and the fixed-side arc contact 5 are separated, and the arc generated here is induced by the arc extinguishing device 17 and extinguished.
  • the movable element 7 rotates clockwise by the closing operation of the opening / closing mechanism 15, and the movable-side arc contact 9 and the fixed-side arc contact 5 first come into contact with each other, so that electricity can be supplied.
  • the movable contact 6 and the fixed contact 3 are pressed against each other by further pushing the opening / closing mechanism 15, the movable element 7 rotates counterclockwise, and the movable arc contact 9 and the fixed arc contact 5 are separated from each other. Power is transferred to movable contact 6 and fixed contact 3.
  • the present invention has been made in order to solve such a problem, and it is easy to extinguish an arc by current limiting without using a tungsten-silver alloy contact as an arc contact for inducing an arc to an extinguishing device 17.
  • the purpose is to provide an inexpensive air circuit breaker that does not easily cause arc contact welding. Disclosure of the invention
  • An air circuit breaker includes a fixed contact fixed to a fixed conductor, a mover having a movable contact fixed to and separated from the fixed contact, a switching mechanism for automatically opening and closing the mover, and a fixed conductor.
  • a fixed-side arc contact provided at the tip of a fixed-side arc conductor extending from the movable element via a first resistor, and a movable-side arc extending from a movable element via a second resistor.
  • a movable arc contact provided at the tip of the conductor.
  • the movable contact When the contact is in contact with the fixed contact, the movable contact is brought into contact with the fixed contact, the movable contact and the fixed contact are brought into contact, and then the movable contact and the fixed arc contact are separated and turned off.
  • the movable arc contact and the fixed arc contact are brought into contact with each other, the movable contact and the fixed contact are separated, and then the movable arc contact and the fixed arc contact are automatically opened and closed. .
  • the resistor is provided only on one of the mover side and the fixed conductor side.
  • FIG. 1 is a sectional view of a main part of an air circuit breaker according to the present invention.
  • FIG. 2 is a transparent perspective view of an energizing portion of the air circuit breaker of the present invention.
  • FIG. 3 is a diagram for explaining the switching operation of the air circuit breaker of the present invention.
  • FIG. 4 is a side sectional view of a conventional air circuit breaker. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 is a cross-sectional view of a main part of an air circuit breaker according to Embodiment 1 of the present invention
  • FIG. 2 is a perspective view of a current-carrying portion of the air circuit breaker of the present invention
  • FIG. It is a figure explaining opening and closing operation of a middle circuit breaker.
  • reference numerals 1 to 4, 6 to 8, and 10 to 17 are the same as those of the above-described conventional device, and the description is omitted.
  • Reference numeral 4a denotes a fixed-side arc contact provided at the tip of the fixed-side arc conductor 4, and 31 denotes a first resistor that is held between the fixed conductor 2 and the fixed-side arc conductor 4 so as to be able to conduct electricity.
  • Reference numeral 8a denotes a movable-side arc contact provided at the tip of the movable-side arc conductor 8, and 32 denotes a second resistor provided so as to be able to conduct between the mover 7 and the movable-side arc conductor 8. .
  • FIG. Fig. 3 (A) shows the on state of the air circuit breaker, in which the fixed contact 3 and the movable contact 6 are in contact, and the fixed-side arc contact 4a and the movable-side arc contact 8a are separated. Therefore, the current flows through the fixed conductor 2 ⁇ the fixed contact 3 ⁇ the movable contact 6 ⁇ the movable element 7 ⁇ the flexible conductor 13 ⁇ the terminal conductor 12.
  • the opening / closing mechanism 15 lifts the shaft 16 by detecting the excessive current, and the movable element 7 is rotated clockwise by the pressing force of the contact pressure panel 14 from the fixed contact 3 to the movable contact 6 Is slightly opened, and electric current is applied between both contacts by an arc.
  • the movable-side arc contact 8a comes into contact with the fixed-side arc contact 4a, and the state shown in FIG. 3B is obtained.
  • the conduction current is fixed conductor 2 ⁇ first resistor 3 1 ⁇ fixed-side arc conductor 4 ⁇ fixed-side arc contact 4a ⁇ movable-side arc contact 8a ⁇ movable-side arc conductor 8 ⁇ second resistor 3 2 ⁇ mover 7 ⁇ flexible conductor 13 ⁇ terminal conductor 12
  • the first resistor 31 and the second resistor 32 inserted into this current path limit the current supplied by the resistance. Due to this current limiting action, the fixed-side arc contact 4a and the movable-side arc contact 8a are separated while the fault current is limited, resulting in the state shown in Fig. 3 (C). . At this time, an arc is generated between the fixed-side arc contact 4a and the movable-side arc contact 8a, but the arc is easily extinguished because the arc energy is reduced by the current limit.
  • the mover 7 since the mover 7 is configured to move at the time of ON / OFF, the current when the movable-side arc contact 8a comes into contact with the fixed-side arc contact 4a is the second current. Since the current is limited by the first resistor 31 and the second resistor 32, the arc energy that causes welding is weakened.
  • the mover 7 is used as a fulcrum until the movable contact 6 contacts the fixed contact 3 at this contact. Since the contact portion is depressed in the counterclockwise direction, the contact portion is welded and peeled off by leverage. Then, when the movable contact 6 and the fixed contact 3 come into contact with each other, the current is transferred to the movable contact 6 and the fixed contact 3 having low resistance, and thereafter, the contact portion between the fixed-side arc contact 4 a and the movable-side arc contact 8 a is changed. Since they are separated, there is no arc generation at this location and there is no wear due to the arc of both contacts'.
  • the fixed-side arc conductor 4 and the movable-side arc conductor 8 including the fixed-side arc contact 4a and the movable-side arc contact 8a may be made of a normal copper-based conductive material. The need for alloy arc contacts is eliminated.
  • the first resistor 31 and the second resistor 32 may be steel plates having a higher specific resistance than steel, instead of a special resistance alloy.
  • the air circuit breaker of the present invention comprises an opening / closing mechanism 15 for manually opening and closing the mover 7, and a first resistor interposed between the fixed conductor 2 and the fixed-side arc contact 4a.
  • the contact 8a is brought into contact with the fixed-side arc contact 4a to bring the movable contact 6 and the fixed contact 3 into contact, and then the movable-side arc contact 8a and the fixed-side arc contact 4a are separated.
  • the movable-side arc contact 8a and the fixed-side arc contact 4a are brought into contact with each other, and the movable contact 6 and the fixed contact 3 are separated from each other.
  • the contact 4a is automatically opened and closed, the current flowing through both contacts during opening and closing can be extinguished by the current limit of the first resistor 31 and the second resistor 32. And then, since the hardly occurs welding of arcing contacts, can be provided inexpensively air circuit breaker in the unnecessary Tandasute Hmm silver alloy contacts arcing contact.

Abstract

L'invention porte sur un disjoncteur à air économique du fait de la suppression d'un contact d'alliage du contact d'arc disposé du côté du dispositif d'extinction et séparé du contact en/hors. Une première résistance (31) est interposée entre un conducteur fixe (2) et un contacteur (4a) d'arc latéral fixe et une deuxième résistance (32) est interposée entre un élément mobile (7) et le contacteur (8a) d'arc latéral mobile. Lorsque l'élément mobile (7) est sous tension, le contacteur (8a) d'arc latéral mobile bute sur le contacteur (4a) d'arc latéral fixe, met le contact mobile (6) en contact avec un contact fixe (3), et sépare le contacteur (8a) d'arc latéral mobile du contacteur (4a) d'arc latéral fixe. Lorsque l'élément mobile est hors tension, le contacteur (8a) d'arc latéral mobile est mis en contact avec le contacteur (4a) d'arc latéral fixe ce qui sépare le contact mobile (6) du contact fixe et ouvre et ferme en pivotant le contacteur (8a) d'arc latéral mobile et le contacteur (4a) d'arc latéral fixe. Le courant traversant les deux contacteurs à l'ouverture ou à la fermeture est ainsi restreint par les deux résistances (31, 32).
PCT/JP2002/001623 2002-02-22 2002-02-22 Disjoncteur a air WO2003071566A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP2003570376A JP4030504B2 (ja) 2002-02-22 2002-02-22 気中遮断器
EP02700721A EP1492138B1 (fr) 2002-02-22 2002-02-22 Disjoncteur a air
DE60236214T DE60236214D1 (de) 2002-02-22 2002-02-22 Luftunterbrecherschalter
KR10-2003-7008040A KR100496596B1 (ko) 2002-02-22 2002-02-22 기중차단기
CNB028045343A CN1215511C (zh) 2002-02-22 2002-02-22 空气断路器
PCT/JP2002/001623 WO2003071566A1 (fr) 2002-02-22 2002-02-22 Disjoncteur a air
ES02700721T ES2342047T3 (es) 2002-02-22 2002-02-22 Disyuntor al aire.
TW091103819A TW556240B (en) 2002-02-22 2002-03-01 Air circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2002/001623 WO2003071566A1 (fr) 2002-02-22 2002-02-22 Disjoncteur a air

Publications (1)

Publication Number Publication Date
WO2003071566A1 true WO2003071566A1 (fr) 2003-08-28

Family

ID=27742305

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2002/001623 WO2003071566A1 (fr) 2002-02-22 2002-02-22 Disjoncteur a air

Country Status (8)

Country Link
EP (1) EP1492138B1 (fr)
JP (1) JP4030504B2 (fr)
KR (1) KR100496596B1 (fr)
CN (1) CN1215511C (fr)
DE (1) DE60236214D1 (fr)
ES (1) ES2342047T3 (fr)
TW (1) TW556240B (fr)
WO (1) WO2003071566A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004063185A1 (de) * 2004-10-18 2006-04-20 Jan Forster Baukörper aus Gipsbausteinen und Verfahren zur Herstellung eines Gipsbausteins
JP2008502294A (ja) * 2004-06-03 2008-01-24 ハイドロ エアー インコーポレイテッド 航空機に適用可能な回路不均衡検出及び回路断続器並びにそのパッケージング
JP2009134995A (ja) * 2007-11-30 2009-06-18 Mitsubishi Electric Corp 気中遮断器
JP2009259818A (ja) * 2008-04-15 2009-11-05 General Electric Co <Ge> 回路遮断器の接点アセンブリ

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100442411C (zh) * 2006-04-26 2008-12-10 王光顺 特高压断路器多级灭弧分断装置
CN110098517B (zh) * 2018-01-29 2021-06-04 北京天诚同创电气有限公司 直流插座

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0290423A (ja) * 1988-09-26 1990-03-29 Mitsubishi Electric Corp 回路遮断器の消弧装置
JPH0290422A (ja) * 1988-09-26 1990-03-29 Mitsubishi Electric Corp 回路しゃ断器
JPH0311511A (ja) * 1989-06-07 1991-01-18 Mitsubishi Electric Corp 気中開閉器

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5260533A (en) * 1991-10-18 1993-11-09 Westinghouse Electric Corp. Molded case current limiting circuit breaker

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0290423A (ja) * 1988-09-26 1990-03-29 Mitsubishi Electric Corp 回路遮断器の消弧装置
JPH0290422A (ja) * 1988-09-26 1990-03-29 Mitsubishi Electric Corp 回路しゃ断器
JPH0311511A (ja) * 1989-06-07 1991-01-18 Mitsubishi Electric Corp 気中開閉器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1492138A4 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008502294A (ja) * 2004-06-03 2008-01-24 ハイドロ エアー インコーポレイテッド 航空機に適用可能な回路不均衡検出及び回路断続器並びにそのパッケージング
DE102004063185A1 (de) * 2004-10-18 2006-04-20 Jan Forster Baukörper aus Gipsbausteinen und Verfahren zur Herstellung eines Gipsbausteins
JP2009134995A (ja) * 2007-11-30 2009-06-18 Mitsubishi Electric Corp 気中遮断器
JP2009259818A (ja) * 2008-04-15 2009-11-05 General Electric Co <Ge> 回路遮断器の接点アセンブリ

Also Published As

Publication number Publication date
CN1215511C (zh) 2005-08-17
EP1492138A4 (fr) 2006-08-02
TW556240B (en) 2003-10-01
JP4030504B2 (ja) 2008-01-09
JPWO2003071566A1 (ja) 2005-06-16
KR20030086582A (ko) 2003-11-10
KR100496596B1 (ko) 2005-06-22
EP1492138A1 (fr) 2004-12-29
EP1492138B1 (fr) 2010-04-28
ES2342047T3 (es) 2010-07-01
CN1493084A (zh) 2004-04-28
DE60236214D1 (de) 2010-06-10

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