EP1914772B1 - Luftschalter, Ausschaltfeder für den Luftschalter und Verbindungsverfahren dafür - Google Patents

Luftschalter, Ausschaltfeder für den Luftschalter und Verbindungsverfahren dafür Download PDF

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Publication number
EP1914772B1
EP1914772B1 EP07019930A EP07019930A EP1914772B1 EP 1914772 B1 EP1914772 B1 EP 1914772B1 EP 07019930 A EP07019930 A EP 07019930A EP 07019930 A EP07019930 A EP 07019930A EP 1914772 B1 EP1914772 B1 EP 1914772B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
air circuit
connection shaft
shaft
breaking
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.)
Active
Application number
EP07019930A
Other languages
English (en)
French (fr)
Other versions
EP1914772A1 (de
Inventor
Hong-Ik Yang
Sang-Chul Lee
Ki-Hwan Kim
Kil-Young Ahn
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.)
LS Electric Co Ltd
Original Assignee
LS Industrial Systems Co Ltd
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 LS Industrial Systems Co Ltd filed Critical LS Industrial Systems Co Ltd
Publication of EP1914772A1 publication Critical patent/EP1914772A1/de
Application granted granted Critical
Publication of EP1914772B1 publication Critical patent/EP1914772B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/522—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism
    • H01H71/525—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism comprising a toggle between cradle and contact arm and mechanism spring acting between handle and toggle knee
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3005—Charging means
    • H01H3/3015—Charging means using cam devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3005—Charging means
    • H01H3/3026—Charging means in which the closing spring charges the opening spring or vice versa
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/02—Details
    • H01H31/023—Base and stationary contacts mounted thereon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/02—Details
    • H01H31/026—Movable parts and contacts mounted thereon

Definitions

  • the present invention relates to an air circuit breaker, a breaking spring of the air circuit breaker and its connection method, and more particularly, to an air circuit breaker capable of simply installing a breaking spring, the breaking spring of the air circuit breaker and its connection method.
  • the air circuit breaker is a device that breaks a circuit (i.e., blocks an electrical connection) when a load is turned on or off, when an overload occurs, when a short circuit accident occurs, or when an electrical leak or shock occurs.
  • the related art air circuit breaker includes a switching mechanism part 102 that switches a circuit by moving a movable contactor 138 to a terminal 139.
  • the switching mechanism part 102 includes a cam 122 connected with a rotational shaft 121 and rotated manually or automatically; a driving lever 124 rotatably installed at a frame 109 supporting both sides of the switching mechanism part 102, includes a lever roller 123, and is rotated as the lever roller 123 is driven along a curved surface of the cam 122 when the cam 122 is rotated; a closing spring 125 which has one end connected with a lower end portion of the driving lever 124 and the other end supported by the frame 109, and is compressed due to the rotation of the driving lever according to the rotation of the cam 122 to store elastic energy; a first latch 127 which extends in a vertical direction so as to be elastically installed at the frame 109 and has a certain recess on its lower surface, and is locked as a pin 126 installed at the cam 122 is caught in the recess; a closing switch 128 installed at an upper side of the first latch 127 and releasing the locked state of the first latch 127; a first link 129 which
  • the breaking spring 137 is stretched when the movable contactor 138 is moved to the terminal 139 by a driving force generated according to rapid stretching of the closing spring 125, and during a breaking operation of the air circuit breaker, the breaking spring 137 provides an elastic force for returning the movable contactor 138 to its initial state.
  • one end of the breaking spring 137 is fixed at both ends of the connection shaft 136 and the other end thereof is fixed at a support shaft 160 installed at the frame 109.
  • the breaking spring 137 includes a first fixing part 151 which is formed in a ring shape and has a fixing hole 154 so as to be inserted to both ends of the connection shaft 136; a second fixing part 152 which is formed in a ring shape and has a fixing hole 155 so as to be inserted to the support shaft 160; and a coil-shaped elastic member 153 interposed between the first and second fixing parts 151 and 152.
  • the related art air circuit breaker constructed as described above performs a charging operation for accumulating elastic energy to the closing spring 125, a closing operation for connecting the movable contactor 138 to the terminal 139 by virtue of the elastic force of the closing spring 125, and a breaking operation for separating the movable contactor 138 from the terminal 139.
  • the charging operation of the air circuit breaker is performed as follows. As shown in FIG. 2 , in a breaking state that the movable contactor 138 is separated from the terminal 139, when the rotational shaft 121 is rotated manually or automatically, the cam 122 is rotated, and accordingly, the driving lever 124 is rotated to compress the closing spring 125.
  • the closing operation of the air circuit breaker is performed as follows. As shown in FIG. 3 , the elastic energy of the closing spring 125 is transferred via respective link mechanisms of the switching mechanism part 102, whereby switching shaft 103 connected with the third link 135 is rotated and the movable contactor 138 comes in contact with the terminal 139, conducting current.
  • the breaking spring 137 is stretched according to movement of the connection shaft 136.
  • the breaking operation of the air circuit breaker is performed as follows. In breaking a circuit, the movable contactor 138 is separated from the terminal 139 by virtue of the elastic force of the stretched breaking spring 137 to return to its original state as shown in FIG. 1 .
  • the breaking spring 137 in order to assemble the breaking spring 137, the second fixing part 152 of the breaking spring 137 is first inserted to the support shaft 160, both ends of the support shaft 160 are then fixed at the frame 109 supporting both sides of the switching mechanism part 102. And then, the breaking spring 137 is stretched by using a tool and the first fixing part 151 is insertedly fixed at both ends of the connection shaft 136.
  • the first fixing part 151 of the breaking spring 137 has a closed loop shape, after the elastic member 153 is stretched, the first fixing part 151 should be moved toward the end portion of the connection shaft 136 and inserted through the end portion of the connection shaft 136. That is, a space for assembling should be secured between the end portion of the connection shaft 136 and the frame 109, which makes it difficult to obtain a compact construction.
  • One aspect of the exemplary embodiments is to provide an air circuit breaker capable of having a compact structure by omitting a space for assembling at an end portion of a connection shaft, a breaking spring of the air circuit breaker and its connection method.
  • Another aspect of the exemplary embodiments is to provide an air circuit breaker capable of simplifying a tool, facilitation installation, shortening an assembling time, and reducing a fabrication cost, a breaking spring of the air circuit breaker, and its connection method.
  • This specification provides an air circuit breaker according to claim 1.
  • the fixing hole may include an entrance through which the connection shaft is inserted, and a receiving part communicating with the entrance and receiving the connection shaft.
  • the receiving part may be formed at a farther position than the entrance with respect to the first fixing part along a stretching direction of the elastic member.
  • An end portion of the first fixing part may include a stop hole in which a tool is caught.
  • the air circuit breaker includes a switching mechanism part 2 that switches a circuit by rotating a movable contactor 38 such that the movable contactor 38 contacts with or separated from a terminal 39.
  • the switching mechanism part 2 includes a cam 22 which is connected with a rotational shaft 21 and rotated manually or automatically; a driving lever 24 which is rotatably installed at a frame 9 supporting both sides of the switching mechanism part 2, includes a lever roller 23, and is rotated as the lever roller 23 is driven along a curved surface of the cam 22 when the cam 22 is rotated; a closing spring 25 which has one end connected with a lower end portion of the driving lever 24 and the other end supported by the frame 9, and is compressed due to the rotation of the driving lever according to the rotation of the cam 22 to store elastic energy; a first latch 27 which extends in a vertical direction so as to be elastically installed at the frame 9 and has a certain recess on its lower surface, and is locked as a pin 26 installed at the cam 22 is caught in the recess; a closing switch 28 which is installed at an upper side of the first latch 27 and releases the locked state of the first latch 27; a first link 29 which is rotatably installed at the rotational shaft 21, extends in a vertical direction,
  • the breaking spring 37 is stretched when the movable contactor 38 is moved to the terminal 39 by a driving force generated according to rapid stretching of the closing spring 25, and during a breaking operation of the air circuit breaker, the breaking spring 37 provides an elastic force for returning the movable contactor 38 to its initial state.
  • one end of the breaking spring 37 is fixed at an end portion of the connection shaft 36 and the other end thereof is fixed at a support shaft 60 installed at the frame 109.
  • the breaking spring 37 not belonging to the invention includes a first fixing part 51 which has a fixing hole 52 with one side opened so as to be inserted to an outer circumferential. Surface of the connection shaft 36; a second fixing part 55 which is formed in a ring shape and has a fixing hole 56 so as to be inserted to the support shaft 60; and a coil-shaped elastic member 57 interposed between the first and second fixing parts 51 and 55.
  • the first fixing part 51 has a substantially hook-like shape.
  • the fixing hole 52 of the first fixing part 51 includes an entrance 53 opened outwardly and a receiving part 54 communicating with the entrance 53 and allowing the connection shaft 36 to be housed and maintained to be caught therein.
  • a stop hole 58 is formed at an end portion of the first fixing part 51 to allow a tool 80 for stretching the breaking spring 37 to be inserted thereinto.
  • the tool 80 includes a rod part 82, a hook part 84 formed to be bent in a hook-like shape at one end of the rod part 82, and a handle part 86 formed at the other end of the rod part 82.
  • the hook part 84 has a diameter smaller than that of the stop hole 58.
  • the breaking spring 37 when the breaking spring 37 is desired to be installed, first, the support shaft 60 is inserted into the fixing hole 56 of the second fixing part 55. Next, the hook part 84 of the tool 80 is inserted into the stop hole 58, and then, the elastic member 57 is stretched such that the center of the entrance 53 of the fixing hole 52 to pass through the center of the connection shaft 36. In this state, the first fixing part 51 is pressed to allow the connection shaft 36 to be inserted through the entrance 53 of the fixing hole 52 of the first fixing part 51. Accordingly, the connection shaft 36 is received in the receiving part 54.
  • the air circuit breaker according to the present invention constructed as described above performs a charging operation for accumulating elastic energy to the closing spring 25, a closing operation for connecting the movable contactor 38 to the terminal 39 by virtue of the elastic force of the closing spring 25, and a breaking operation for separating the movable contactor 38 from the terminal 39.
  • the charging operation of the air circuit breaker is performed as follows. As shown in FIG. 7 , in a breaking state that the movable contactor 38 is separated from the terminal 39, when the rotational shaft 21 is rotated manually or automatically, the cam 22 is rotated, and accordingly, the driving lever 24 is rotated to compress the closing spring 25.
  • the closing operation of the air circuit breaker is performed as follows. As shown in FIG. 8 , the elastic energy of the closing spring 25 is transferred via respective link mechanisms of the switching mechanism part 2, whereby switching shaft 3 connected with the third link 35 is rotated and the movable contactor 38 comes in contact with the terminal 39, conducting current.
  • the breaking operation of the air circuit breaker is performed as follows. In breaking a circuit, the movable contactor 38 is separated from the terminal 39 by virtue of the elastic force of the stretched breaking spring 37 to return to its original state as shown in FIG. 6 .
  • the breaking spring 37 can be mounted by simply pulling the first fixing part 51 and hooking it to the connection shaft 36.
  • no space is required for assembling the breaking spring 37 between the connection shaft 36 and the frame 9 and designing of the tool for pulling the first fixing part 51 can be simplified.
  • FIG. 12 is a front view of a breaking spring according to an exemplary embodiment of the present invention.
  • the breaking spring 37 of the air circuit breaker includes a first fixing part 70 having a fixing hole 72 with one side opened and inserted to an outer circumferential surface of the connection shaft 36; a second fixing part 55 formed in a ring shape and having a fixing hole 56 so as to be inserted to the support shaft 60; and a coil-shaped elastic member 57 interposed between the first fixing part 70 and the second fixing part 55.
  • the first fixing part 70 includes a rectangular platy body 71 and a fixing hole 72 opened from one side of the body 71.
  • a stop hole 78 is formed spaced apart from the fixing hole 72 on the body 71, into which the tool 80 is combined.
  • the center of the stop hole 78 comes on the same line as that of the fixing hole 72.
  • the fixing hole 72 includes an entrance 73 formed to be opened outwardly at the side of the body 71 and a receiving part 74 communicating with the entrance 73 and receiving the connection shaft 36.
  • the receiving part 74 is formed at a farther position from the second fixing part 55 along a stretching direction of the elastic member 57 compared with the entrance 73.
  • the breaking spring 37 when the breaking spring 37 is desired to be installed, first, the second fixing part 55 is connected to the support shaft 60. Next, the hook part 84 of the tool 80 is inserted into the stop hole 78, and the elastic member 57 is stretched such that the center of the entrance 73 of the fixing hole 72 of the first fixing part 70 passes through the center of the connection shaft 36. Thereafter, the first fixing part 70 is pressed to allow the connection shaft 36 to be inserted into the entrance 73 of the fixing hole 72 of the first fixing part 70. Accordingly, the connection shaft 36 is received in the receiving part 74.
  • the air circuit breaker, the breaking spring of the air circuit breaker and its connection method according to the present invention have the following advantages.
  • the breaking spring can be easily installed.
  • connection shaft because there is no need to secure a space for assembling between the end portion of the connection shaft and the frame, a compact structure can be obtained.
  • the breaking spring does not need to be moved in the axial line direction of the connection shaft after being stretched, the structure of the tool can be simplified, the assembly time can be shortened, and the fabrication cost can be reduced.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)

Claims (4)

  1. Luftschalter umfassend:
    eine Nocke (22), welche mit einer Drehwelle (21) verbunden ist und gedreht wird;
    einen Antriebshebel (24), welcher mit der Nocke (22) verbunden ist und gedreht wird;
    eine Ausschaltfeder (25), welche mit dem Antriebshebel (24) verbunden ist und entsprechend der Drehung des Antriebshebels (24) komprimiert wird;
    eine Vielzahl von Verbindungen (29, 34, 35), die eine Antriebskraft übertragen, die erzeugt wird, wenn die Ausschaltfeder (25) gedehnt ist;
    eine Schaltwelle (3), welche mit einer der Verbindungen (35) durch eine Verbindungswelle (36) verbunden ist, und entsprechend der Bewegung der Verbindung (35) dreht; und
    eine Ausschaltfeder (37), welche einen Endabschnitt mit einem Fixierloch (72) aufweist, von dem eine Seite geöffnet ist, um an der Verbindungswelle (36) senkrecht zu einer Axiallinienrichtung der Verbindungswelle (36) befestigt zu sein, und deren anderer Endabschnitt an einer Unterstützungswelle (60) befestigt ist, die an dem Rahmen (9) montiert ist, von welchem die Vielzahl von Verbindungen (29, 34, 35) getragen wird;
    wobei die Ausschaltfeder umfasst:
    ein erstes Fixierteil (70) mit einem Fixierloch (72), das in eine äußere Umfangsoberfläche der Verbindungswelle (36) einzufügen ist;
    ein zweites Fixierteil (55) mit einem Fixierloch (56), welches in die Unterstützungswelle (60) eingefügt wird; und
    ein elastisches Bauteil (57), welches zwischen die ersten (70) und zweiten (55) Fixierteile eingesetzt ist,
    dadurch gekennzeichnet, dass
    das erste Fixierteil (70) eine rechtwinklige Plattenform aufweist.
  2. Luftschalter nach Anspruch 1, bei welchem das Fixierloch (72) eine Öffnung (73) umfasst, durch welche die Verbindungswelle (36) eingefügt wird, und ein Aufnahmeteil (74), welches mit der Öffnung (73) kommuniziert und die Verbindungswelle (36) aufnimmt.
  3. Luftschalter nach Anspruch 2, bei welchem das Aufnahmeteil (74) an einer entfernteren Position gebildet ist als die Öffnung (73) in Bezug auf das erste Fixierteil (70) entlang einer Ausdehnungsrichtung des elastischen Bauteils (57).
  4. Luftschalter nach Anspruch 1, bei welchem ein Endabschnitt des ersten Fixierteils (70) ein Stopploch (78) umfasst, in welchem ein Werkzeug (80) gefangen ist.
EP07019930A 2006-10-17 2007-10-11 Luftschalter, Ausschaltfeder für den Luftschalter und Verbindungsverfahren dafür Active EP1914772B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2020060027977U KR200437402Y1 (ko) 2006-10-17 2006-10-17 기중 차단기 및 그에 사용되는 차단스프링

Publications (2)

Publication Number Publication Date
EP1914772A1 EP1914772A1 (de) 2008-04-23
EP1914772B1 true EP1914772B1 (de) 2010-06-02

Family

ID=39517261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07019930A Active EP1914772B1 (de) 2006-10-17 2007-10-11 Luftschalter, Ausschaltfeder für den Luftschalter und Verbindungsverfahren dafür

Country Status (7)

Country Link
EP (1) EP1914772B1 (de)
KR (1) KR200437402Y1 (de)
CN (1) CN101202182B (de)
DE (1) DE602007006881D1 (de)
ES (1) ES2345119T3 (de)
MY (1) MY158110A (de)
RU (1) RU2373599C2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102290294A (zh) * 2011-07-01 2011-12-21 法泰电器（江苏）股份有限公司 断路器牵引杆

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101786519B1 (ko) * 2013-01-08 2017-10-18 엘에스산전 주식회사 가스 절연 차단기
CN103646826B (zh) * 2013-11-28 2016-09-14 德力西电气有限公司 一种漏电保护模块的动作机构
CN103646827B (zh) * 2013-12-02 2017-03-08 上海良信电器股份有限公司 一种断路器操作机构储能系统
KR101667637B1 (ko) * 2014-10-06 2016-10-19 엘에스산전 주식회사 차단기의 파단 방지 복귀 스프링 조립체
CN110571091B (zh) * 2019-09-25 2024-07-30 北京合锐清合电气有限公司 Zw32型柱上开关隔离刀与开关机构的联锁机构
RU206368U1 (ru) * 2021-03-10 2021-09-08 Общество С Ограниченной Ответственностью "Свердловэлектро-Силовые Трансформаторы" (Ооо "Свэл-Силовые Трансформаторы") Приемный контакт аппарата высокого напряжения
RU206634U1 (ru) * 2021-03-10 2021-09-20 Общество С Ограниченной Ответственностью "Свердловэлектро-Силовые Трансформаторы" (Ооо "Свэл-Силовые Трансформаторы") Контактное устройство аппарата высокого напряжения

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FR2663152B1 (fr) * 1990-06-11 1996-04-26 Merlin Gerin Mecanisme d'un disjoncteur a ressorts a boudin groupes tendus et procede de montage des ressorts.
US5181069A (en) * 1990-07-23 1993-01-19 Station Eight, Inc. Method and apparatus for rewiring corona wire cartridge
FR2723252B1 (fr) * 1994-08-01 1996-09-13 Schneider Electric Sa Mecanisme de disjoncteur equipe d'un dispositif a ccumulateur d'energie a butee d'amortissement
FR2785444B1 (fr) * 1998-10-30 2000-12-15 Schneider Electric Ind Sa Appareillage de coupure comportant un organe mecanique de visualisation a trois positions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102290294A (zh) * 2011-07-01 2011-12-21 法泰电器（江苏）股份有限公司 断路器牵引杆

Also Published As

Publication number Publication date
EP1914772A1 (de) 2008-04-23
CN101202182A (zh) 2008-06-18
MY158110A (en) 2016-08-30
KR200437402Y1 (ko) 2007-11-30
RU2373599C2 (ru) 2009-11-20
CN101202182B (zh) 2011-09-21
RU2007138409A (ru) 2009-04-27
ES2345119T3 (es) 2010-09-15
DE602007006881D1 (de) 2010-07-15

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