WO2016103063A1 - Unité de déclenchement d'un ensemble de commutation - Google Patents

Unité de déclenchement d'un ensemble de commutation Download PDF

Info

Publication number
WO2016103063A1
WO2016103063A1 PCT/IB2015/057090 IB2015057090W WO2016103063A1 WO 2016103063 A1 WO2016103063 A1 WO 2016103063A1 IB 2015057090 W IB2015057090 W IB 2015057090W WO 2016103063 A1 WO2016103063 A1 WO 2016103063A1
Authority
WO
WIPO (PCT)
Prior art keywords
lever
shaft
rotation
switching assembly
tripping
Prior art date
Application number
PCT/IB2015/057090
Other languages
English (en)
Inventor
Amol JADHAV
Manoj DESHMUKH
Ramesh Viswanathan IYER
Vasantha Kumar
Vikas JAKATE
Original Assignee
Abb Technology 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 Abb Technology Ltd. filed Critical Abb Technology Ltd.
Priority to BR112017013745A priority Critical patent/BR112017013745A2/pt
Publication of WO2016103063A1 publication Critical patent/WO2016103063A1/fr

Links

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
    • H01H3/227—Interlocked hand- and power-operating mechanisms
    • 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
    • H01H33/46—Interlocking mechanisms
    • H01H33/50—Interlocking mechanisms for interlocking two or more parts of the mechanism for operating 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
    • H01H2009/0088—Details of rotatable shafts common to more than one pole or switch unit
    • 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
    • H01H33/666—Operating arrangements
    • H01H33/6662—Operating arrangements using bistable electromagnetic actuators, e.g. linear polarised electromagnetic actuators

Definitions

  • the invention relates to a switching assembly such as, but not limited to, a circuit breaker assembly and an autorecloser. More specifically, the invention relates to a tripping unit of such a switching assembly.
  • Swiching assemblies such as autoreclosers may be used in overhead electrical lines for correcting faults having a temporal nature. For instance, there may be a lightning strike in a surrounding area, leading to a temporary operation of an autorecloser. Such operation leads to a blackout for a short period of time, after which the autorecloser operates again for restoring power. Sometimes, when the autorecloser operates again, the fault is still present. This leads to the autorecloser operating again. After a certain number of automatic retries, if the fault does not go, the autorecloser does not restore the connection automatically. Manual intervention is then required for diagnosing and removing the fault in such switching assemblies. It is required to have improved mechanisms to control operation of switching assemblies during such service.
  • the invention relates to a tripping unit of an switching assembly.
  • the switching assembly can be one of, but need not be limited to, an autorecloser and a circuit breaker assembly.
  • the switching assembly has at least one pole having an interrupter.
  • the switching assembly has one or three poles, wherien each pole has an interrupter.
  • the tripping unit comprises a first shaft coupled with the interrupter.
  • the coupling is such that rotation of the first shaft about a first axis causes translation of one or more contacts of the interrupter for one of opening and closing of the interrupter.
  • the switching assembly comprises three poles, the interrupter of each pole is coupled with the first shaft such that rotation of the first shaft about the first axis simultaneously operates the three interrupters.
  • a first lever is attached to the first shaft for said rotation of the first shaft about the first axis.
  • the tripping unit further comprises a mechanism for automatically tripping the switching assembly.
  • the mechanism comprises an actuator coupled with the first shaft and the first lever. The actuator automatically actuates the first lever for operating the interrupter according to an operating condition.
  • the tripping unit also comprises a mechanism for manually tripping the switching assembly.
  • the mechanism comprises a second shaft, a handle, a second lever and a latch.
  • the second shaft is rotatable about a second axis.
  • the handle is attached to the second shaft for rotating the second shaft about the second axis.
  • the second lever is attached to the second shaft for rotating the first shaft through the first lever according to said rotation of the second shaft for operating the interrupter.
  • the latch is for latching the handle and in turn the second shaft, the second lever, the first lever and the first shaft in a predetermined position after said rotation of the second shaft.
  • the mechanism for manually tripping the switching assembly comprises a spring coupled with the second lever for retaining the second lever in a predetermined position.
  • the tripping unit comprises a mechanism for preventing rotation of the first shaft in the predetermined position.
  • the mechanism comprises a third lever, wherein the third lever is interlocked with the second lever.
  • the interlocking is such that the rotation of the second shaft moves the third lever into an interlocked position from an open positon.
  • the third lever prevents rotation of the first shaft due to movement of at least one of the handle and the actuator.
  • the third lever is interlocked with the second lever such that rotation of the second lever in a clockwise direction causes rotation of the third lever in an anticlockwise direction.
  • the tripping unit comprises at least one screw for further preventing rotation of at least one of the first lever, the second lever and the third lever.
  • the at least one screw is attached to one of an end of the third lever and a housing of the switching assembly to prevent rotation of at least one of the second lever and the third lever in the predetermined position.
  • the tripping unit also comprises a limit switch for limiting operation of the actuator according to the rotation of at least one of the first shaft and the second shaft.
  • FIG. 1 illustrates a side view of a switching assembly, in accordance with an embodiment of the invention
  • FIG. 2 illustrates a sectional view of the switching assembly, in accordance with an embodiment of the invention
  • FIG. 3 and Fig. 4 illustrate different perspective views of a second shaft and a second lever of the switching assembly, in accordance with an embodiment of the invention
  • FIG. 5 illustrates another sectional view of the switching assembly, in accordance with the embodiment of the invention.
  • FIG. 6 and 7 illustrate different positions of a first lever and a third lever, in accordance with an embodiment of the invention.
  • Fig. 8 illustrates a perspective view of a limit swtich of the switching assembly, in accordance with an embodiment of the invention.
  • Switching assembly 100 can be one of, but need not be limited to, an autorecloser and a circuit breaker assembly. As illustrated, switching assembly 100 has a pole 102 on a housing 104. While in the embodiment illustrated in Fig. 1 , it is shown that switching assembly 100 has a single pole, in another embodiment switching assembly 100 has three poles (not illustrated).
  • Pole 102 has an interrupter (not illustrated) to control opening and closing of switching assembly 100.
  • the interrupter may be a vacuum interrupter.
  • each pole has an interrupter.
  • the interrupter (or interrupters) can be operated either automatically or manually (as explained hereinafter), for controlling the state of switching assembly 100.
  • tripping unit 200 comprises a first shaft 202.
  • First shaft 202 is coupled with the interrupter (coupling not shown in figures, however such coupling would be readily apparent to one of ordinary skill in the art).
  • the coupling is such that rotation of first shaft 202 about a first axis 204 causes translation of at least one contact of the interrupter (the at least one contact is not show in figures, however translation of moving contact(s) of an interrupter due to rotational movement of a shaft such as first shaft 202 would be readily apparent to one of oridnary skill in the art).
  • the translation of the at least one contact is for one of opening and closing of the interrupter, which opens / closes switching assembly 100.
  • switching assembly 100 comprises three poles
  • the interrupter of each pole is coupled with first shaft 202 such that rotation of first shaft 202 about first axis 204 simultaneously operates the three interrupters (connection between the three poles and first shaft is not shown in figures, however such connection between first shaft and the three interrupters would be readily apparent).
  • a first lever 206 is attached to first shaft 202 for said rotation of first shaft 202 about first axis 204.
  • Tripping unit 200 further comprises a mechanism for automatically tripping switching assembly 100.
  • the mechanism comprises an actuator 208 coupled with first shaft 202 and first lever 206.
  • Actuator 208 may be, but need not be limited to, a magnetic actuator. Other actuators such as pneumatic and / or hydraulic may also be used.
  • Actuator 208 automatically actuates first lever 206 for operating the interrupter according to an operating condition. For example, actuator 208 may operate (210) to disconnect the circuit upon sensing a faulty condition. Here, actuator 208 may operate (212) again to reconnect the circuit after a certain amount of time has elapsed.
  • Tripping unit 200 also comprises a mechanism for manually tripping switching assembly 100 (also referred to as manual tripping mechanism).
  • the mechanism comprises a second shaft 214, a handle 106 (refer Fig. 1), a second lever 216 and a latch 108 (refer Fig. 1).
  • Second shaft 214 is rotatable about a second axis 218.
  • Handle 106 is attached to second shaft 214 for rotating second shaft 214 about second axis 218.
  • second lever 216 is mounted on second shaft 214. Further, second lever 216 may have one or more arms (e.g. two shown in Fig. 3 and Fig. 4).
  • Second shaft 214 may be an assembly having concentric shafts (refer Fig. 4 in view of Fig. 3). Further, there may be a torsion spring 220 mounted between the two shafts. A slot 222 may be provided for controling twisting of torsion spring 220. Such twisting may be to control opening / closing of switching assembly 100.
  • Second lever 216 is attached to second shaft 214 for rotating first shaft 202 through first lever 206 according to rotation of second shaft 214 for operating the interrupter. In the embodiment illustrated in Fig. 2 and Fig. 5, rotation of second shaft 214 in a clockwise direction causes second lever 216 to rotate first shaft 202 through first lever 206.
  • Latch 108 is for latching handle 106 and in turn second shaft 214, second lever 216, first lever 206 and first shaft 202 in a predetermined position after said rotation of second shaft 214.
  • handle 106 can be latched with latch 108 when second shaft 214, second lever 216, first lever 206 and first shaft 202 are in the position illustrated in Fig. 5.
  • the mechanism for manually tripping switching assembly 100 comprises a spring 224 coupled with second lever 216 for retaining second lever 216 in a predetermined position. For example, when switching assembly 100 is in the closed position shown in Fig. 1, and handle 106 is manually rotated by a few degrees (but not latched), upon release of handle 106 spring 224 repositions handle 106, closing switching assembly 100.
  • tripping unit 200 comprises a mechanism for preventing rotation of first shaft 202 in the predetermined position.
  • the mechanism comprises a third lever 226.
  • Third lever 226 is interlocked at 228 with second lever 216 as shown in Fig. 2.
  • the interlocking is such that the rotation of second shaft 214 moves third lever 226 into an interlocked position (shown in Fig. 5, 7) from an open positon (shown in Fig. 2 and Fig. 6).
  • third lever 226 and first lever 204 have been labeled in Fig. 6 and Fig. 7.
  • third lever 226 prevents rotation of first shaft 202.
  • rotation due to movement of one or more of handle 106 and actuator 208 may be prevented due to the interlocking of third lever 226 in the interlocked position.
  • third lever 226 is interlocked with second lever 216 such that rotation of second lever 216 in a clockwise direction causes rotation of third lever 226 in an anticlockwise direction.
  • tripping unit 200 comprises at least one screw (e.g. one, two or more screws) for further preventing rotation of at least one of first lever 204, second lever 216 and third lever 226.
  • a screw 230 is attached to an end of third lever 226 to prevent rotation of third lever 226 due to actuation by either actuator 208 or handle 106, wherine the rotation is prevented when third lever 226 is in the predetermined position.
  • a screw 232 is attached to housing 104 of switching assembly 100 to prevent rotation of at least one of second lever 216 and third lever 226 in the interlocked position.
  • Tripping unit 200 may also comprise a limit switch 802 as illustrated in Fig. 8. Components of tripping unit 200 other than limit switch 802 have not been labelled in Fig. 8 for clarity. Limit switch 802 can be provided for further limiting operation of actuator 208 when first lever 204 is in the predetermined position. In accordance with the embodiment illustrated in Fig. 8, limit switch 802 is activated by rotation of second shaft 214. [0030] In an exemplary implementation of the invention, switching assembly 100 is an autorecloser. In accordance with the implementation, the manual tripping mechanism is provided to open the autorecloser during emergency.
  • first shaft 202 rotates in a clockwise direction and during OPEN operation; first shaft 202 rotates in an anti-clockwise direction.
  • second lever 216 operates first shaft 202 and rotates it in the anti-clockwise direction.
  • handle 106 is pulled down, which rotates second lever 216 by a few degrees.
  • Second lever 216 stops after moving first lever 206 (as shown in Fig. 2 and Fig. 5).
  • torsion spring 220 gets twisted. This is because one end of torsion spring 220 is rotated by handle 106, while the other end is rigidly retained b y second lever 216, which is stopped by first lever 106 (Figs. 2 - 5).
  • first shaft 202 is balanced by clockwise torque generated by actuator 108.
  • anti-clockwise torque by torsion spring 220
  • clockwise torque by actuator 208 exerted on first shaft 202. This makes first shaft 202 to rotate in the anti-clockwise direction, which separates the interrupter contact to open the autorecloser.
  • third lever 226 comes to an interlocked position in order to restrict clockwise rotation of first lever 206.
  • first lever 206 and third lever 226, which can be adjusted using screw 230.
  • screw 232 may be mounted on a rigid flat block of the housing in a position to further restrict rotation of third lever 226 at the autorecloser' s open condition. This position can also be adjusted by rotating screw 232.
  • the limit switch blocks a close command to actuator 208 when the autorecloser is manually tripped.
  • handle 106 When the autorecloser is opened by manual tripping, handle 106 is at a 45-50° form its original position, and is latched to latch 108.
  • latch 108 To reset from the manually tripped condition and enable normal functioning of the autorecloser, latch 108 needs to be pulled down (to release the lock between handle 106 and latch 108). Upon releasing of the lock, handle 106 goes back to the original position due to spring 224 connected at second lever 216.
  • third lever 226 The purpose of third lever 226 is to restrict clockwise rotation of first shaft 202, when operated through the manual tripping mechanism.
  • any closing command to actuator 208 does not rotate first shaft 202 and does not separate the interrupter contact.
  • the limit switch provides additional control over operation of actuator 208.
  • the invention provides improved mechanisms to control operation of switching assemblies during manual service.

Landscapes

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

Abstract

L'invention concerne une unité de déclenchement d'un ensemble de commutation, lequel ensemble de commutation comporte au moins un pôle ayant un interrupteur. L'unité de déclenchement comporte un premier arbre couplé à l'interrupteur pour l'ouverture et la fermeture de l'interrupteur. Un premier levier est fixé sur le premier arbre pour le faire tourner. L'unité de déclenchement comprend également un mécanisme de déclenchement automatique de l'ensemble de commutation, et un mécanisme de déclenchement manuel de l'ensemble de commutation. Le mécanisme de déclenchement manuel comporte un verrou permettant de verrouiller une poignée du mécanisme pour maintenir le premier arbre dans une position prédéterminée. En outre, l'unité de déclenchement comprend un mécanisme permettant d'empêcher la rotation du premier arbre dans la position prédéterminée. Le mécanisme comprend un troisième levier verrouillé au moyen d'un deuxième levier du mécanisme de déclenchement manuel, une position de verrouillage du troisième levier empêchant la rotation du premier arbre.
PCT/IB2015/057090 2014-12-24 2015-09-15 Unité de déclenchement d'un ensemble de commutation WO2016103063A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BR112017013745A BR112017013745A2 (pt) 2014-12-24 2015-09-15 unidade de desarme de um conjunto de comutação

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN6542/CHE/2014 2014-12-24
IN6542CH2014 2014-12-24

Publications (1)

Publication Number Publication Date
WO2016103063A1 true WO2016103063A1 (fr) 2016-06-30

Family

ID=56149343

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2015/057090 WO2016103063A1 (fr) 2014-12-24 2015-09-15 Unité de déclenchement d'un ensemble de commutation

Country Status (2)

Country Link
BR (1) BR112017013745A2 (fr)
WO (1) WO2016103063A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108630485A (zh) * 2017-03-22 2018-10-09 河南华盛隆源电气有限公司 一种具有可见隔离断口的户外负荷开关
CN110914946A (zh) * 2017-07-24 2020-03-24 三菱电机株式会社 开闭器的互锁装置及开闭系统
CN111192769A (zh) * 2018-03-28 2020-05-22 平高集团有限公司 可调行程的操动机构组件以及断路器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4935712A (en) * 1987-09-26 1990-06-19 Mitsubishi Denki Kabushiki Kaisha Operation mechanism of a circuit breaker allowing automatic or manual operation
JPH11329167A (ja) * 1998-05-19 1999-11-30 Yaskawa Electric Corp 開閉器の操作装置
US6127637A (en) * 1997-12-29 2000-10-03 S&C Electric Co. Disconnect feature for interrupter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4935712A (en) * 1987-09-26 1990-06-19 Mitsubishi Denki Kabushiki Kaisha Operation mechanism of a circuit breaker allowing automatic or manual operation
US6127637A (en) * 1997-12-29 2000-10-03 S&C Electric Co. Disconnect feature for interrupter
JPH11329167A (ja) * 1998-05-19 1999-11-30 Yaskawa Electric Corp 開閉器の操作装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108630485A (zh) * 2017-03-22 2018-10-09 河南华盛隆源电气有限公司 一种具有可见隔离断口的户外负荷开关
CN110914946A (zh) * 2017-07-24 2020-03-24 三菱电机株式会社 开闭器的互锁装置及开闭系统
CN110914946B (zh) * 2017-07-24 2021-11-16 三菱电机株式会社 开闭器的互锁装置及开闭系统
CN111192769A (zh) * 2018-03-28 2020-05-22 平高集团有限公司 可调行程的操动机构组件以及断路器
CN111192769B (zh) * 2018-03-28 2021-11-16 平高集团有限公司 可调行程的操动机构组件以及断路器

Also Published As

Publication number Publication date
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