EP2787519A1 - Antriebsmechanismus zum Trennen eines Schalter - Google Patents

Antriebsmechanismus zum Trennen eines Schalter Download PDF

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Publication number
EP2787519A1
EP2787519A1 EP20140158829 EP14158829A EP2787519A1 EP 2787519 A1 EP2787519 A1 EP 2787519A1 EP 20140158829 EP20140158829 EP 20140158829 EP 14158829 A EP14158829 A EP 14158829A EP 2787519 A1 EP2787519 A1 EP 2787519A1
Authority
EP
European Patent Office
Prior art keywords
shaft
drive mechanism
disconnecting
switch according
coupled
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.)
Granted
Application number
EP20140158829
Other languages
English (en)
French (fr)
Other versions
EP2787519B1 (de
Inventor
Kapil Bavikar
Ravindra Chikhale
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP2787519A1 publication Critical patent/EP2787519A1/de
Application granted granted Critical
Publication of EP2787519B1 publication Critical patent/EP2787519B1/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
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/22—Interlocking, locking, or latching mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/46—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having three operative positions, e.g. off/star/delta
    • 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
    • H01H31/04—Interlocking mechanisms
    • H01H31/06—Interlocking mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts
    • 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
    • H01H31/003—Earthing switches

Definitions

  • the present invention relates to a drive mechanism for disconnecting a switch and more particularly to a drive mechanism for three position electrical disconnector switch.
  • An electrical distribution device has a circuit breaker with the vacuum interrupter and a three position disconnector switch enclosed inside the vessel of stainless steel with sulphur hexafluoride (SF6) gas as insulating medium and an operating mechanism to operate the circuit breaker and the disconnector.
  • the three position disconnector consists of disconnector shaft with contact blades mounted on it, service contacts or ON contacts to keep the contacts in service giving "ON” position and earth contacts to earth the feeder or incoming line in electrical distribution giving "earth” position and an intermediate position between the "ON” and "earth” position giving “OFF” position. It also consists of an operating mechanism that will keep operated and keep the disconnector shaft in above-mentioned position.
  • the locking in different position is provided by the latches on the spring loaded mechanism.
  • the snap action mechanism is connected to the rotary bushing on the vessel through a link and coupler on the inside of the vessel is connected to the disconnector shaft.
  • the latches keep the disconnector shaft in ON, OFF or EARTH position till there is an external force is applied on the shaft.
  • Such a mechanism may not be suitable in the vessel which has small dimensions.
  • the object is achieved by providing a drive mechanism for disconnecting a switch according to claim 1.
  • the drive mechanism includes a first shaft rotatable along a horizontal axis, a handle for rotating the first shaft, a pusher disposed within the first shaft mechanically coupled to a spring disposed therein, wherein the spring is coupled to the pusher at a first end and mechanically coupled to an extension of the first shaft at a second end, an assembly coupled to the extension of the first shaft, the assembly coupled to a second shaft through a rotary bushing and a coupler disposed within the second shaft for transferring a motion of the first shaft to the second shaft, such that the second shaft rotates between two or more positions.
  • the first shaft is rotated by using the handle, which in turn rotates a second shaft to rotate between two or more positions.
  • the handle is replaceably coupled to the first shaft. This arrangement enables the handle to be coupled or decoupled with the first shaft when required.
  • the first shaft includes a slot for engaging the handle.
  • a key in the handle is engaged with the slot to prevent movement of the handle during operation.
  • the drive mechanism includes a pin engaged with the pusher, the pin passing through the first shaft.
  • the pin enables a locking mechanism in the first shaft.
  • the pin is engaged with a bush having a plurality of engagement slots for preventing movement of the first shaft and the second shaft.
  • the engagement slots in the bush enable the pin to be locked at respective positions according to the arrangement of the engagement slots. Locking of the pin prevents movement of both the first shaft and the second shaft, thereby preventing the shaft to move from positions, which are two or more positions.
  • a second pin engaged in a slot on the handle prevents the pusher to move beyond the desired distance inside the first shaft.
  • the engagement slots on the bush are arranged such that the pin is aligned at a position corresponding to the two or more positions.
  • the engagement slots lock the pin thus not allowing the first shaft and the second shaft to rotate.
  • the two or more positions include a first position, a second position and an intermediate position between the first position and the second position.
  • the bush includes a plurality of extension for preventing the second shaft to rotate beyond the two or more positions.
  • the extensions prevent movement of the second shaft directly from the first position to the second position and/or from the second position to the first position.
  • Embodiments of the present technique relate to a drive mechanism for disconnecting a switch and more particularly to a drive mechanism for three position electrical disconnector switch.
  • switch may refer to a circuit breaker, a disconnector an isolator and so forth.
  • the drive mechanism 10 includes a first shaft 20, a handle 30 coupled to the first shaft 20, a pin 24, a bush 26, a second shaft 60 with one or more contact blades 62 mounted on it.
  • the first shaft 20 which is rotatable along a horizontal axis and the handle 30 for rotating the first shaft 20 are mechanically coupled to each other.
  • the first shaft 20 is a hollow shaft having a pusher 29 (see FIG. 3 ) disposed within the first shaft 20.
  • the pusher 29 is mechanically coupled to a spring 28, as will be described in greater detail with reference to FIG. 3 .
  • the handle 30 includes a key 32 which engages in a slot 22 of the first shaft 20.
  • the handle 30 is replaceably coupled with the first shaft 20.
  • replaceably coupled means that the handle 30 may be removed and may be replaced either with the same or similar handle at the slot 22 in the first shaft 20 to couple with the first shaft 20.
  • the drive arrangement of the first shaft 20 is pivoted between a front bearing plate 12 and a rear bearing plate 14.
  • a pin 24 passes through the first shaft 20, the pin 24 is fitted onto the pusher 29 (not shown in FIG. 1 and FIG. 2 , see FIG. 3 ) by interference fit.
  • the drive mechanism 10 includes a bush 26 through which the first shaft 20 passes, the bush 26 coupled to the front bearing plate.
  • the bush 26 may be coupled using bolts or screws with the front bearing plate 12.
  • the bush 26 includes a plurality of engagement slots 25, such that the pin 24 engages with the engagement slots 25 providing a locking arrangement.
  • the movement of the pusher 29 causes the pin 24 to move in a to and fro direction. This enables the pin 24 to get engaged in the engagement slots 25 of the bush 26. The engagement of the pin 24 prevents movement of the first shaft 20 and the second shaft 60.
  • FIG. 3 a schematic diagram depicting the first shaft 20 alongwith the handle 30 is presented.
  • a second pin 34 for engagement with a slot on the handle 30 is provided.
  • the second pin 34 locks with the slot on the handle 30 thereby preventing further movement of the handle 30.
  • the first shaft 20 is a hollow shaft having the pusher 29 and the spring 28 disposed therein.
  • the handle 30 pushes the pusher 29 inside the first shaft 20, which includes the pin 24 fitted by interference fit causing a to and fro movement of the pin 24.
  • movement of the pusher 29 causes compression in the spring 28 which is attached or coupled to the pusher 29 at a first end and attached or coupled to an extension 40 of the first shaft 20 at a second end.
  • the spring 28 is mechanically coupled with the pusher 29 at the first end and mechanically coupled to the extension 40 of the first shaft 20 at the second end.
  • extension 40 of the first shaft 20 is a solid shaft.
  • the spring 28 may be welded or engaged in a slot on the pusher 29 at the first end, similarly, at the second end the spring 28 may be coupled to the extension 40 of the first shaft 20 by inserting the spring 28 into a slot in the extension 40.
  • the spring 28 may be placed in a manner, such that the first end of the spring 28 is in contact with the pusher 29 and the second end is in contact with the extension 40 of the first shaft 20.
  • FIG. 4 a schematic diagram depicting the positions of the pin 24 engaged with the bush 26 is presented.
  • the bush 26 includes a plurality of engagement slots 25 for engaging the pin 24.
  • Reference numeral 100 is representative of a first position
  • reference numeral 300 is representative of a second position
  • reference numeral 200 is representative of an intermediate position between the first position 100 and the second position 300.
  • the first position 100 corresponds to "ON” position
  • the second position 300 corresponds to "Earth” position
  • the intermediate position 200 corresponds to the "OFF” position.
  • FIG. 5 a schematic diagram depicting an arrangement of the first shaft 20 with the second shaft 60 is presented.
  • the first drive shaft 20 includes the extension 40, wherein the extension 40 is coupled to the assembly 45.
  • the assembly 45 is in turn mechanically coupled to the second shaft 60 through a rotary bushing 44 and a coupler 46. It may be noted that the coupler 46 is disposed within the second shaft 60.
  • the pin 24 is engaged with the bush 26, and particularly with the engagement slots 25 of the bush 26, thereby providing a locking arrangement.
  • the assembly 45 includes a first lever 41 and a second lever 43 mechanically coupled to each other through a coupler 42.
  • the second lever 43 is connected to the second shaft 60 through the rotary bushing 44 and the coupler 46.
  • the second shaft 60 includes one or more contact blades 62, which get into contact with the one or more contacts, such as the "ON" contacts 50 and the "Earth” contacts 52.
  • the second shaft 60 rotates between the two or more positions.
  • the second shaft rotates between the first position 100, the intermediate position 200 and the second position 300.
  • the contact blades 62 of the second shaft 60 are in contact with the "ON" contacts 50
  • the contact blades 62 of the second shaft 60 are in contact with the "Earth” contacts 52
  • the contact blades 62 do not touch the contacts 50, 52 aligned between the "ON" contacts 50 and the "Earth” contacts 52.
  • the bush 26 includes extensions 27 for preventing the pin 24 to move to beyond the first position 100 and/or the second position 300, more particularly preventing the second shaft 60 to rotate beyond the first position and/or the second position.
  • the motion of the first shaft 20 is transferred to the first lever 41 of the assembly 45 through the coupler 42 to the second lever 43, which is coupled to the rotary bushing 44.
  • the rotary bushing 44 has the coupler 46 mounted thereon and the coupler is disposed inside the second shaft 60. Such an arrangement transfers the motion of the first shaft 20 to the second shaft 60.
  • the handle 30 when removed from the first shaft 20 after the pin 24 is locked in the engagement slot 25 of the bush 26, a locking is achieved which prevents the first shaft 20 and the second shaft 60 to rotate.
  • the locking at the two or more positions such as the first position 100, the second position 300 and the intermediate position 200 is achieved.
  • an interlocking plate (not shown) may be present having slots therein for inserting the key 32 of the handle 30, the key 32 may go beyond the interlocking plate. This arrangement prevents removal of the handle 30 from the first shaft 20 as the handle is locked by the interlocking plate through the key 32. Additionally, the arrangement prevents the removal of handle 30 in between the first position 100 and the intermediate position 200 and the second position 300 and the intermediate position 200.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP14158829.3A 2013-04-03 2014-03-11 Antriebsmechanismus zum Trennen eines Schalter Active EP2787519B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN375KO2013 2013-04-03

Publications (2)

Publication Number Publication Date
EP2787519A1 true EP2787519A1 (de) 2014-10-08
EP2787519B1 EP2787519B1 (de) 2016-10-19

Family

ID=50276942

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14158829.3A Active EP2787519B1 (de) 2013-04-03 2014-03-11 Antriebsmechanismus zum Trennen eines Schalter

Country Status (2)

Country Link
EP (1) EP2787519B1 (de)
ES (1) ES2608832T3 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105280427A (zh) * 2015-11-27 2016-01-27 国家电网公司 一种隔离开关单相及使用该隔离开关单相的隔离开关
CN106531535A (zh) * 2016-12-25 2017-03-22 中山弗雷德机械有限公司 一种机械联锁装置
CN107316773A (zh) * 2017-07-11 2017-11-03 江苏镇德电力设备有限公司 一种地刀连锁装置连接件
CN110970242A (zh) * 2019-12-31 2020-04-07 德布森电气（上海）有限公司 一种双向操作的旋转式储能操作机构
WO2020253891A1 (es) * 2019-06-15 2020-12-24 Gualdron Florez Jesus Equipo interruptor seccionador para procedimiento de seguridad eléctrica y cumplimiento de las cinco reglas de oro de seguridad eléctrica desde un mismo equipo
EP3872941A1 (de) * 2020-02-28 2021-09-01 Siemens Aktiengesellschaft Bedieneinheit für einen erdungsschalterantrieb einer luftisolierten schaltanlage

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1684148A (en) * 1926-02-19 1928-09-11 Westinghouse Electric & Mfg Co Disconnecting switch
DE4313650A1 (de) * 1993-04-21 1994-10-27 Siemens Ag Antriebsvorrichtung für einen Trenn- oder Erdungsschalter in einem Schaltfeld
US20040045937A1 (en) * 2002-09-11 2004-03-11 Hoglund Justin R. Isolation switch for electric power systems
DE102006041366B3 (de) * 2006-08-28 2008-01-24 Siemens Ag Verriegelungsvorrichtung für eine elektrische Schaltanlage
EP2339603A2 (de) * 2009-12-23 2011-06-29 LS Industrial Systems Co., Ltd Sperrvorrichtung eines Erdungsschalters für einen Vakuumschutzschalter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1684148A (en) * 1926-02-19 1928-09-11 Westinghouse Electric & Mfg Co Disconnecting switch
DE4313650A1 (de) * 1993-04-21 1994-10-27 Siemens Ag Antriebsvorrichtung für einen Trenn- oder Erdungsschalter in einem Schaltfeld
US20040045937A1 (en) * 2002-09-11 2004-03-11 Hoglund Justin R. Isolation switch for electric power systems
DE102006041366B3 (de) * 2006-08-28 2008-01-24 Siemens Ag Verriegelungsvorrichtung für eine elektrische Schaltanlage
EP2339603A2 (de) * 2009-12-23 2011-06-29 LS Industrial Systems Co., Ltd Sperrvorrichtung eines Erdungsschalters für einen Vakuumschutzschalter

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105280427A (zh) * 2015-11-27 2016-01-27 国家电网公司 一种隔离开关单相及使用该隔离开关单相的隔离开关
CN106531535A (zh) * 2016-12-25 2017-03-22 中山弗雷德机械有限公司 一种机械联锁装置
CN107316773A (zh) * 2017-07-11 2017-11-03 江苏镇德电力设备有限公司 一种地刀连锁装置连接件
WO2020253891A1 (es) * 2019-06-15 2020-12-24 Gualdron Florez Jesus Equipo interruptor seccionador para procedimiento de seguridad eléctrica y cumplimiento de las cinco reglas de oro de seguridad eléctrica desde un mismo equipo
US11521813B2 (en) 2019-06-15 2022-12-06 Jesus GUALDRON FLOREZ Disconnecting switchgear for electrical safety procedure and compliance with the five golden rules of electrical safety via a single switch
CN110970242A (zh) * 2019-12-31 2020-04-07 德布森电气（上海）有限公司 一种双向操作的旋转式储能操作机构
EP3872941A1 (de) * 2020-02-28 2021-09-01 Siemens Aktiengesellschaft Bedieneinheit für einen erdungsschalterantrieb einer luftisolierten schaltanlage

Also Published As

Publication number Publication date
EP2787519B1 (de) 2016-10-19
ES2608832T3 (es) 2017-04-17

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