CN1215511C - Air circuit breaker - Google Patents

Air circuit breaker Download PDF

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Publication number
CN1215511C
CN1215511C CNB028045343A CN02804534A CN1215511C CN 1215511 C CN1215511 C CN 1215511C CN B028045343 A CNB028045343 A CN B028045343A CN 02804534 A CN02804534 A CN 02804534A CN 1215511 C CN1215511 C CN 1215511C
Authority
CN
China
Prior art keywords
contact
electric arc
side electric
arc contact
fixed
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 - Fee Related
Application number
CNB028045343A
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Chinese (zh)
Other versions
CN1493084A (en
Inventor
冈下广史
川上淳一
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
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of CN1493084A publication Critical patent/CN1493084A/en
Application granted granted Critical
Publication of CN1215511C publication Critical patent/CN1215511C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • 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
    • H01H9/42—Impedances connected with contacts
    • 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

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

Abstract

The present invention relates to an air circuit breaker which is characterized in that a first resistance element (31) is clamped between a fixed conductor (2) and a fixed side arc contact member (4a); a second resistance element (32) is clamped between a moving element (7) and a moving side arc contact member (8a); when the moving element (7) is turned on, the moving side arc contact member (8a) is butted with the fixed side arc contact member (4a); after a moving contact (6) contacts a fixed contact (3), the moving side arc contact member (8a) is separated from the fixed side arc contact member (4a); when the moving element (7) is turned off, the moving side arc contact member (8a) contacts the fixed side arc contact member (4a); after the moving contact (6) is separated from the fixed contact (3), the moving side arc contact member (8a) contacts the fixed side arc contact member (4a) or is separated from the fixed side arc contact member (4a) in a swinging mode; when the moving side arc contact member (8a) contacts the fixed side arc contact member (4a) or is separated from the fixed side arc contact member (4a) in a swinging mode, the current of the moving side arc contact member (8a) and the fixed side arc contact member (4a) goes through current limiting via the first resistance element (31) and the second resistance element (32). The arc contact members arranged on the side of an arc-extinguishing device and separated from an opening contact and a closing contact do not need alloy contacts, and thereby, the air circuit breaker is cheap.

Description

Air circuit
Technical field
The present invention relates to the improvement that air circuit opens and closes the contact.
Background technology
Fig. 4 is the sectional view of the conventional air circuit breaker of for example Japanese patent laid-open 2-90424 communique record.
Among the figure, the 1st, the basket that forms by insulating material, the 2nd, several utmost points are set up in parallel the fixed conductor in basket 1, and one end and fixed contact 3 are fixing, and the other end is derived and is formed power supply side terminal 2a to the outside of basket 1.The 4th, the fixation side electric arc conductor that the arc-extinction device direction of chatting backward from fixed conductor 2 prolongs, the 5th, be fixed in the fixation side arc contact of fixation side electric arc conductor 4 leading sections.
The 6th, can leave the moving contact of contact with respect to fixed contact 3, the 7th, be fixed with the moving element of moving contact 6, the 8th, the movable side electric arc conductor that moving element 7 is prolonged towards the arc-extinction device direction, the 9th, be fixed on the movable side arc contact of movable side electric arc conductor 8 leading sections.
The 10th, the contact arm that moving element 7 is kept rotationally, the 11st, contact arm 10 is supported on contact arm axle on the basket 1.The 12nd, terminal conductor, being fixed on the basket 1 and to the outside of basket 1 derives, and forms power supply side terminal 12a.The 13rd, the flexible conductor that moving element 7 is connected with terminal conductor 12 movably.The 14th, to the connect pressing spring of moving element 7 towards the departure direction application of force, the 15th, switching mechanism, the 16th, the axle of the pivot of moving element 7, the 17th, arc-extinction device, the 18th, tripping relay.
Switching mechanism 15 is to be made of well-known elbow-bar mechanism, and moving element 7 is opened and closed, and makes this air circuit connect, disconnect, and under on-state, the latch (not shown) that is engaged with tripping relay 18 only blocks, and keeps connection status.In case the engaging of latch is freed, then disconnect.The 19th, the connection actuating force of switching mechanism 15 is held the connection spring of power, the 20th, will connect the cam mechanism that spring 19 usefulness handles 21 or not shown motor compress the power of holding.
Air circuit so, the load that connected is produced overcurrent or the super-high-current that causes because of accident etc. detects, by tripping relay 18 the only open switching mechanism 15 that makes of the card of latch is moved, be when center up push away with contact arm 10 with contact arm axle 11 by the power that connects pressing spring 14, moving element 7 is that the center is towards counterclockwise rotating with axle 16, fixed contact 3 and moving contact 6 are left, and the electric current between two contacts is cut off.
Contact arm 10 makes the moving element 7 that is connected with switching mechanism 15 in connection, swing when disconnecting with the position relation that axle 16 and contact arm axle 11 form.Wobbling action to moving element 7 explains below.
In the connection status, moving contact 6 contacts with fixed contact 3, but movable side arc contact 9 separates with fixation side arc contact 5.When cutting off action, along with the pulling of going up of the contact arm 10 of switching mechanism 15 is done, moving contact 6 has slightly with fixed contact 3 and separates, and carries out the energising of electric arc between two contacts.Then, moving element 7 is that rotate toward the clockwise direction at the center by the pressing force that connects pressing spring 14 with axle 16, and movable side arc contact 9 contacts with fixation side arc contact 5.The pulling of going up by switching mechanism 15 is done, movable side arc contact 9 and fixation side arc contact 5 are under the state that keeps in touch, as fulcrum moving contact 6 is separated significantly with fixed contact 3, electric arc between the contact is extended, and the main body of electric current is transferred to movable side arc contact 9 and fixation side arc contact 5.By the action of switching mechanism 15, moving element 7 is towards counterclockwise rotating, and movable side arc contact 9 separates with fixation side arc contact 5, and the electric arc of Fa Shenging is lured to arc-extinction device 17 and by extinguishing arc herein.
In addition, in the ON Action, by the action of closing of switching mechanism 15, moving element 7 rotates toward the clockwise direction, and is initial, and movable side arc contact 9 contacts with fixation side arc contact 5, can switch on.Because of switching mechanism 15 further is pressed into, when moving contact 6 was made face contact with fixed contact 3, moving element 7 was towards counterclockwise rotating, and movable side arc contact 9 separates with fixation side arc contact 5, and energising is just shifted towards moving contact 6 and fixed contact 3.
Above-mentioned conventional air circuit breaker is that the electric arc that takes place when making failure of current shifts towards movable side arc contact 9 and fixation side arc contact 5, lures to arc-extinction device 17 and carries out extinguishing arc.Therefore, the consumption that arc spark causes when standing failure of current, and arc contact welding in order to chat after preventing, fixation side arc contact 5 and movable side arc contact 9 Ceng Bixu make tungsten-silver alloy contact.
The summary of invention
The present invention carries out for solving above-mentioned problem, its purpose is to provide a kind of and does not use tungsten-silver alloy contact for electric arc being lured to the arc contact of arc-extinction device 17, and make extinguishing arc that current limliting produces easily, arc contact is difficult for the cheap air circuit of welding.
Above-mentioned air circuit of the present invention comprises: the fixed conductor that is fixed with fixed contact; Be fixed with moving element with the moving contact of this fixed contact contact separation; The switching mechanism that the moving element swing is opened and closed; Set fixation side electric arc contact on the leading section of the fixation side electric arc conductor that extends by the 1st resistive element from fixed conductor; Set movable side electric arc contact on the leading section of the movable side electric arc conductor that extends by the 2nd resistive element from moving element, when switching mechanism is connected moving element, movable side electric arc contact and fixation side electric arc contact butt, at moving contact with after fixed contact contacts, movable side electric arc contact separates with fixation side electric arc contact, when it is disconnected, movable side electric arc contact contacts with fixation side electric arc contact, with after fixed contact is separated, movable side electric arc contact separates with the swing of fixation side electric arc side contacts part at moving contact.
In addition, resistive element only is arranged on either party in moving element side or the fixed conductor side.
The simple declaration of accompanying drawing
Fig. 1 is the cutaway view of the major part of expression air circuit of the present invention.
Fig. 2 is the perspective elevation of the conducting parts of air circuit of the present invention.
Fig. 3 is the key diagram of explanation air circuit on-off action of the present invention.
Fig. 4 is the sectional view of conventional air circuit breaker.
The best example of invention
Example 1
Fig. 1 is the cutaway view of major part of the air circuit of expression example 1 of the present invention, and Fig. 2 is the perspective elevation of the conducting parts of air circuit of the present invention, and Fig. 3 is the key diagram of explanation air circuit on-off action of the present invention.
Among the figure, 1-4,6-8,10-17 be because identical with above-mentioned traditional device, the Therefore, omited explanation.4a is arranged on the fixation side electric arc contact of fixation side electric arc conductor 4 leading sections, and the 31st, be clamped in the 1st resistive element of switching between fixed conductor 2 and the fixation side electric arc conductor 4.8a is arranged on the movable side electric arc contact of movable side electric arc conductor 8 leading sections, and 32 are provided in a side of the 2nd resistive element of switching between moving element 7 and the movable side electric arc conductor 8.
Now utilize Fig. 3 that the action of air circuit of the present invention is described.The on-state of Fig. 3 (A) expression air circuit, fixed contact 3 contacts with moving contact 6, and fixation side electric arc contact 4a separates with movable side electric arc contact 8a.Therefore, electrical current flows by the order of fixed conductor 2 → fixed contact 3 → moving contact 6 → moving element 7 → flexible conductor 13 → terminal conductor 12.
According to the detection of super-high-current, by cutting off the action beginning, switching mechanism 15 lifts axle 16, and by connecing the pressing force of pressing spring 14, moving element 7 rotates toward the clockwise direction, and fixed contact 3 has slightly with moving contact 6 separates, and produces the electric arc energising between two contacts.Moving element 7 rotates and continues, and then movable side electric arc contact 8a contacts with fixation side electric arc contact 4a, becomes the state shown in Fig. 3 (B).Here, electrical current flows by the order of fixed conductor 2 → the 1st resistive element 31 → fixation side electric arc conductor 4 → fixation side electric arc contact 4a → movable side electric arc contact 8a → movable side electric arc conductor 8 → the 2nd resistive element 32 → moving elements 7 → flexible conductor 13 → terminal conductor 12.Insert the 1st resistive element 31 and the 2nd resistive element 32 of this current channel, electrical current is carried out current limliting by its resistance.
By this metering function, fault current etc. by the state of current limliting under, fixation side electric arc contact 4a separates with movable side electric arc contact 8a, becomes the state shown in Fig. 3 (C).At this moment, between fixation side electric arc contact 4a and movable side electric arc contact 8a, produce electric arc, but arc energy is reduced because of current limliting, so extinguishing arc is carried out easily.
In addition, have in this air circuit when connecting under sizable electric current flow regime, can produce the contact weld phenomenon, can alleviate welding phenomena in the structure of the present invention.It is the reasons are as follows.By the ON Action of switching mechanism 15, at first movable side electric arc contact 8a and fixation side electric arc contact 4a butt, electric current flows between two contacts.
Impact during because of connection is repelled, and has slightly between two contacts separately and make, and the electric current that flows in this gap produces electric arc, and the high temperature of this electric arc makes two to contact the melt surface of winding up the case.Two contacts butt once more under this state, in case electric arc disappears, welding takes place in the then fusing department of contact surfaces cooling.As countermeasure, the silver alloy contact that general contact adopts infusibility to connect.
In the structure of the present invention, because moving element 7 is swung when connection, disconnection, so when movable side electric arc contact 8a and fixation side electric arc contact 4a butt, electric current is subjected to current limliting by the 1st resistive element 31 and the 2nd resistive element 32, thereby has weakened the arc energy that causes welding.Even there is welding in fixation side electric arc contact 4a with the abutting part of movable side electric arc contact 8a, moving element 7 can this abutting part be that fulcrum is towards counterclockwise pressing down also, with till fixed contact 3 contacts, abutting part produces welding and peels off under leverage up to moving contact 6.Then, in case moving contact 6 contacts with fixed contact 3, moving contact that then the electric current steering resistance is little 6 and fixed contact 3, then the abutment portion of fixation side electric arc contact 4a and movable side electric arc contact 8a from, at this position electric arc does not take place, the consumption that does not have the electric arc of two contacts to cause.
Therefore, comprise fixation side electric arc conductor 4 and the movable side electric arc conductor 8 of fixation side electric arc contact 4a and movable side electric arc contact 8a, the yet common electric conducting material based on copper can not need the arc contact of tungsten-silver alloy.
In addition, the 1st resistive element the 31, the 2nd resistive element 32 also can not be special electric resistance alloy, also can be the steel plate bigger than copper product intrinsic resistance.
In the above-mentioned explanation, be that the both sides at fixation side electric arc conductor 4 and movable side electric arc conductor 8 are provided with the 1st resistive element the 31, the 2nd resistive element 32 respectively, obviously, only be located at therein either party and also can obtain equal effect.
The possibility of utilizing on the industry
The air-break of the invention described above comprises: the switching mechanism 15 that moving element 7 swings are opened and closed; Be clipped in the 1st resistive element 31 between fixed conductor 2 and the fixation side electric arc contact 4a; Be clipped in moving element 7 and drawer at movable side electric arc contact 8a between the 2nd resistive element 32, at switching mechanism 15 with moving element 7 During connection, make drawer at movable side electric arc contact 8a and fixation side electric arc contact 4a butt, make moving contact 6 After fixed contact 3 contacts, drawer at movable side electric arc contact 8a is separated with fixation side electric arc contact 4a, Drawer at movable side electric arc contact 8a contacts with fixation side electric arc contact 4a during disconnection, make moving contact 6 with After fixed contact 3 is separated, by making drawer at movable side electric arc contact 8a and fixation side electric arc contact 4a swing Leave, the electric current that passes through on two contacts during switching utilizes the limit of the 1st resistive element 31, the 2nd resistive element 32 Flow and easy extinguishing arc, the electric arc contact is difficult for welding, and can obtain the electric arc contact does not need tungsten-silver alloy to touch The cheap air-break of point.

Claims (3)

1. an air circuit is characterized in that having: the fixed conductor (2) that is fixed with fixed contact (3); Be fixed with moving element (7) with the moving contact of this fixed contact (3) contact separation; The switching mechanism (15) that moving element (7) swing is opened and closed; Passing through the 1st resistive element (31) set fixation side electric arc contact (4a) on fixation side electric arc conductor (4) leading section that arc-extinction device (17) side is extended from described fixed conductor (2); Passing through the 2nd resistive element (32) set movable side electric arc contact (8a) on movable side electric arc conductor (8) leading section that described arc-extinction device (17) side is extended from described moving element (7),
The swing of switching mechanism (15) opens and closes when described moving element (7) is connected, described movable side electric arc contact (8a) and described fixation side electric arc contact (4a) butt, at described moving contact (6) with after described fixed contact (3) contacts, described movable side electric arc contact (8a) separates with described fixation side electric arc contact (4a), when described moving element (7) disconnects, described movable side electric arc contact (8a) contacts with described fixation side electric arc contact (4a), with after described fixed contact (3) is separated, described movable side electric arc contact (8a) separates with described fixation side electric arc contact (4a) at described moving contact (6).
2. an air circuit is characterized in that having: the fixed conductor (2) that is fixed with fixed contact (3); Be fixed with moving element (7) with the moving contact of this fixed contact (3) contact separation; The switching mechanism (15) that moving element (7) swing is opened and closed; Passing through the 1st resistive element (31) set fixation side electric arc contact (4a) on fixation side electric arc conductor (4) leading section that arc-extinction device (17) side is extended from described fixed conductor (2); From described moving element (7) set movable side electric arc contact (8a) on movable side electric arc conductor (8) leading section that described arc-extinction device (17) side is extended,
The swing of switching mechanism (15) opens and closes when described moving element (7) is connected, described movable side electric arc contact (8a) and described fixation side electric arc contact (4a) butt, at described moving contact (6) with after described fixed contact (3) contacts, described movable side electric arc contact (8a) separates with described fixation side electric arc contact (4a), when described moving element (7) disconnects, described movable side electric arc contact (8a) contacts with described fixation side electric arc contact (4a), with after described fixed contact (3) is separated, described movable side electric arc contact (8a) separates with described fixation side electric arc contact (4a) at described moving contact (6).
3. an air circuit is characterized in that having: the fixed conductor (2) that is fixed with fixed contact (3); Be fixed with moving element (7) with the moving contact of this fixed contact (3) contact separation; The switching mechanism (15) that moving element (7) swing is opened and closed; From described fixed conductor (2) set fixation side electric arc contact (4a) on fixation side electric arc conductor (4) leading section that arc-extinction device (17) side is extended; Passing through resistive element (32) set movable side electric arc contact (8a) on movable side electric arc conductor (8) leading section that described arc-extinction device (17) side is extended from described moving element (7),
The swing of switching mechanism (15) opens and closes when described moving element (7) is connected, described movable side electric arc contact (8a) and described fixation side electric arc contact (4a) butt, at described moving contact (6) with after described fixed contact (3) contacts, described movable side electric arc contact (8a) separates with described fixation side electric arc contact (4a), when described moving element (7) disconnects, described movable side electric arc contact (8a) contacts with described fixation side electric arc contact (4a), with after described fixed contact (3) is separated, described movable side electric arc contact (8a) separates with described fixation side electric arc contact (4a) at described moving contact (6).
CNB028045343A 2002-02-22 2002-02-22 Air circuit breaker Expired - Fee Related CN1215511C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2002/001623 WO2003071566A1 (en) 2002-02-22 2002-02-22 Air circuit breaker

Publications (2)

Publication Number Publication Date
CN1493084A CN1493084A (en) 2004-04-28
CN1215511C true CN1215511C (en) 2005-08-17

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ID=27742305

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB028045343A Expired - Fee Related CN1215511C (en) 2002-02-22 2002-02-22 Air circuit breaker

Country Status (8)

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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7362551B2 (en) * 2001-02-01 2008-04-22 Hydro-Aire, Inc. Aircraft applicable circuit imbalance detection and circuit interrupter and packaging thereof
DE102004063185A1 (en) * 2004-10-18 2006-04-20 Jan Forster Building component with supporting walls, ceilings and/or floors, comprises individual plaster blocks that can be dismantled
CN100442411C (en) * 2006-04-26 2008-12-10 王光顺 Multi-stage arc suppressing breaking device for extra-high voltage circuit breaker
JP2009134995A (en) * 2007-11-30 2009-06-18 Mitsubishi Electric Corp Air circuit breaker
US7935902B2 (en) * 2008-04-15 2011-05-03 General Electric Company Contact assembly of circuit breaker
CN110098517B (en) * 2018-01-29 2021-06-04 北京天诚同创电气有限公司 DC socket

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0290423A (en) * 1988-09-26 1990-03-29 Mitsubishi Electric Corp Arc extinguishing device of circuit breaker
JPH0290422A (en) * 1988-09-26 1990-03-29 Mitsubishi Electric Corp Circuit breaker
JPH0311511A (en) * 1989-06-07 1991-01-18 Mitsubishi Electric Corp Gas switch
US5260533A (en) * 1991-10-18 1993-11-09 Westinghouse Electric Corp. Molded case current limiting circuit breaker

Also Published As

Publication number Publication date
CN1493084A (en) 2004-04-28
EP1492138B1 (en) 2010-04-28
EP1492138A1 (en) 2004-12-29
JP4030504B2 (en) 2008-01-09
DE60236214D1 (en) 2010-06-10
TW556240B (en) 2003-10-01
JPWO2003071566A1 (en) 2005-06-16
ES2342047T3 (en) 2010-07-01
WO2003071566A1 (en) 2003-08-28
KR20030086582A (en) 2003-11-10
EP1492138A4 (en) 2006-08-02
KR100496596B1 (en) 2005-06-22

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