EP2787519A1 - Drive mechanism for disconnecting a switch - Google Patents
Drive mechanism for disconnecting a switch Download PDFInfo
- 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
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 41
- 239000007787 solid Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 2
- 229960000909 sulfur hexafluoride Drugs 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
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)
Abstract
Description
- 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.
- Existing drive mechanisms have a disconnector shaft which is operated by means of a spring loaded snap action mechanism, which typically includes multiple parts or components. Furthermore, existing storage drive sub- assemblies take up a large amount of space.
- 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.
- It is an object of the present invention to provide a drive mechanism for disconnecting a switch which can be fitted in a compact vessel, involves less number of components and is also cost effective.
- The object is achieved by providing a drive mechanism for disconnecting a switch according to claim 1.
- According to the invention a drive mechanism for disconnecting a switch is presented. 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. By having such an arrangement the first shaft is rotated by using the handle, which in turn rotates a second shaft to rotate between two or more positions.
- In one embodiment, 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.
- In one embodiment, 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.
- In one embodiment, 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.
- In another embodiment, 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.
- In one embodiment, a second pin engaged in a slot on the handle prevents the pusher to move beyond the desired distance inside the first shaft.
- In another embodiment, 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. By having the engagement slots the locking of the pin in the two or more positions between which the second shaft rotates is achieved.
- In one embodiment, the two or more positions include a first position, a second position and an intermediate position between the first position and the second position.
- In another embodiment, 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.
- The above-mentioned and other features of the invention will now be addressed with reference to the accompanying drawings of the present invention. The illustrated embodiments are intended to illustrate, but not limit the invention. The drawings contain the following figures, in which like numbers refer to like parts, throughout the description and drawings.
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FIG. 1 is a schematic diagram depicting an exemplary drive mechanism for disconnecting a switch; -
FIG. 2 is a schematic diagram depicting another view of the exemplary drive mechanism; -
FIG. 3 is a schematic diagram depicting a handle coupled with the first shaft; -
FIG. 4 is a schematic diagram depicting positions in bush depicting the locking arrangement; and -
FIG. 5 is a schematic diagram depicting an arrangement of the first shaft and a second shaft with contacts, in accordance with aspects of the present technique. - 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. As used herein, the term "switch" may refer to a circuit breaker, a disconnector an isolator and so forth.
- Referring now to
FIG. 1 andFIG. 2 , a schematic diagram depicting anexemplary drive mechanism 10 for disconnecting a switch is presented. Thedrive mechanism 10 includes afirst shaft 20, ahandle 30 coupled to thefirst shaft 20, apin 24, abush 26, asecond shaft 60 with one ormore contact blades 62 mounted on it. - In accordance with aspects of the present technique, the
first shaft 20 which is rotatable along a horizontal axis and thehandle 30 for rotating thefirst shaft 20 are mechanically coupled to each other. - The
first shaft 20 is a hollow shaft having a pusher 29 (seeFIG. 3 ) disposed within thefirst shaft 20. Thepusher 29 is mechanically coupled to aspring 28, as will be described in greater detail with reference toFIG. 3 . - It may be noted that the
handle 30 includes akey 32 which engages in aslot 22 of thefirst shaft 20. Thehandle 30 is replaceably coupled with thefirst shaft 20. As used herein the term "replaceably coupled" means that thehandle 30 may be removed and may be replaced either with the same or similar handle at theslot 22 in thefirst shaft 20 to couple with thefirst shaft 20. - With continuing reference to
FIG. 1 andFIG. 2 , the drive arrangement of thefirst shaft 20 is pivoted between a front bearingplate 12 and arear bearing plate 14. Apin 24 passes through thefirst shaft 20, thepin 24 is fitted onto the pusher 29 (not shown inFIG. 1 andFIG. 2 , seeFIG. 3 ) by interference fit. Thedrive mechanism 10 includes abush 26 through which thefirst shaft 20 passes, thebush 26 coupled to the front bearing plate. Thebush 26 may be coupled using bolts or screws with the front bearingplate 12. - In accordance with aspects of the present technique, the
bush 26 includes a plurality ofengagement slots 25, such that thepin 24 engages with theengagement slots 25 providing a locking arrangement. - It may be noted that the movement of the
pusher 29 causes thepin 24 to move in a to and fro direction. This enables thepin 24 to get engaged in theengagement slots 25 of thebush 26. The engagement of thepin 24 prevents movement of thefirst shaft 20 and thesecond shaft 60. - Turning now to
FIG. 3 , a schematic diagram depicting thefirst shaft 20 alongwith thehandle 30 is presented. Asecond pin 34 for engagement with a slot on thehandle 30 is provided. Thesecond pin 34 locks with the slot on thehandle 30 thereby preventing further movement of thehandle 30. - As previously noted, the
first shaft 20 is a hollow shaft having thepusher 29 and thespring 28 disposed therein. Thehandle 30 pushes thepusher 29 inside thefirst shaft 20, which includes thepin 24 fitted by interference fit causing a to and fro movement of thepin 24. - Furthermore, movement of the
pusher 29 causes compression in thespring 28 which is attached or coupled to thepusher 29 at a first end and attached or coupled to anextension 40 of thefirst shaft 20 at a second end. - In accordance with aspects of the present technique, the
spring 28 is mechanically coupled with thepusher 29 at the first end and mechanically coupled to theextension 40 of thefirst shaft 20 at the second end. - It may be noted that the
extension 40 of thefirst shaft 20 is a solid shaft. - In accordance with aspects of the present technique, the
spring 28 may be welded or engaged in a slot on thepusher 29 at the first end, similarly, at the second end thespring 28 may be coupled to theextension 40 of thefirst shaft 20 by inserting thespring 28 into a slot in theextension 40. - In another embodiment, the
spring 28 may be placed in a manner, such that the first end of thespring 28 is in contact with thepusher 29 and the second end is in contact with theextension 40 of thefirst shaft 20. - Referring now to
FIG. 4 , a schematic diagram depicting the positions of thepin 24 engaged with thebush 26 is presented. Thebush 26 includes a plurality ofengagement slots 25 for engaging thepin 24.Reference numeral 100 is representative of a first position,reference numeral 300 is representative of a second position andreference numeral 200 is representative of an intermediate position between thefirst position 100 and thesecond position 300. - In accordance with aspects of the present technique, the
first position 100 corresponds to "ON" position, thesecond position 300 corresponds to "Earth" position and theintermediate position 200 corresponds to the "OFF" position. - Referring now to
FIG. 5 , a schematic diagram depicting an arrangement of thefirst shaft 20 with thesecond shaft 60 is presented. - As previously noted, the
first drive shaft 20 includes theextension 40, wherein theextension 40 is coupled to theassembly 45. Theassembly 45 is in turn mechanically coupled to thesecond shaft 60 through arotary bushing 44 and acoupler 46. It may be noted that thecoupler 46 is disposed within thesecond shaft 60. - Furthermore, the
pin 24 is engaged with thebush 26, and particularly with theengagement slots 25 of thebush 26, thereby providing a locking arrangement. - In accordance with aspects of the present technique, the
assembly 45 includes afirst lever 41 and asecond lever 43 mechanically coupled to each other through acoupler 42. Thesecond lever 43 is connected to thesecond shaft 60 through therotary bushing 44 and thecoupler 46. - The
second shaft 60 includes one ormore contact blades 62, which get into contact with the one or more contacts, such as the "ON"contacts 50 and the "Earth"contacts 52. - As mentioned earlier, the
second shaft 60 rotates between the two or more positions. In the presently contemplated configuration, the second shaft rotates between thefirst position 100, theintermediate position 200 and thesecond position 300. - As an example, at the
first position 100, thecontact blades 62 of thesecond shaft 60 are in contact with the "ON"contacts 50, at thesecond position 300, thecontact blades 62 of thesecond shaft 60 are in contact with the "Earth"contacts 52, and at theintermediate position 200, thecontact blades 62 do not touch thecontacts contacts 50 and the "Earth"contacts 52. - Furthermore, the
bush 26 includesextensions 27 for preventing thepin 24 to move to beyond thefirst position 100 and/or thesecond position 300, more particularly preventing thesecond shaft 60 to rotate beyond the first position and/or the second position. - In accordance with aspects of the present technique, the motion of the
first shaft 20 is transferred to thefirst lever 41 of theassembly 45 through thecoupler 42 to thesecond lever 43, which is coupled to therotary bushing 44. Therotary bushing 44 has thecoupler 46 mounted thereon and the coupler is disposed inside thesecond shaft 60. Such an arrangement transfers the motion of thefirst shaft 20 to thesecond shaft 60. - It may be noted that in the
present drive mechanism 10 thehandle 30 when removed from thefirst shaft 20 after thepin 24 is locked in theengagement slot 25 of thebush 26, a locking is achieved which prevents thefirst shaft 20 and thesecond shaft 60 to rotate. By such an arrangement the locking at the two or more positions, such as thefirst position 100, thesecond position 300 and theintermediate position 200 is achieved. - Furthermore, 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 thehandle 30 from thefirst shaft 20 as the handle is locked by the interlocking plate through the key 32. Additionally, the arrangement prevents the removal ofhandle 30 in between thefirst position 100 and theintermediate position 200 and thesecond position 300 and theintermediate position 200. - Although the invention has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternate embodiments of the invention, will become apparent to persons skilled in the art upon reference to the description of the invention. It is therefore contemplated that such modifications can be made without departing from the embodiments of the present invention as defined.
Claims (15)
- A drive mechanism (10) for disconnecting a switch, comprising- a first shaft (20) rotatable along a horizontal axis,- a handle (30) for rotating the first shaft (20),- a pusher (29) disposed within the first shaft (20) mechanically coupled to a spring (28) disposed therein, wherein the spring (28) is coupled to the pusher (29) at a first end and mechanically coupled to an extension (40) of the first shaft (20) at a second end,- an assembly (45) coupled to the extension (40) of the first shaft (20), the assembly (45) coupled to a second shaft (60) through a rotary bushing (44) and a coupler (46) disposed within the second shaft (60) for transferring a motion of the first shaft (20) to the second shaft (60), such that the second shaft (60) rotates between two or more positions.
- The drive mechanism (10) for disconnecting a switch according to claim 1, wherein the first shaft (20) is a hollow shaft.
- The drive mechanism (10) for disconnecting a switch according to claim 1, wherein the extension (40) of the first shaft (20) is a solid shaft.
- The drive mechanism (10) for disconnecting a switch according to claims 1 to 3, wherein the handle (30) is replaceably coupled to the first shaft (20).
- The drive mechanism (10) for disconnecting a switch according to claim 1 to 4, wherein the first shaft (20) comprises a slot (22) for engaging the handle (30).
- The drive mechanism (10) for disconnecting a switch according to claims 1 to 5, further comprising a pin (24) engaged with the pusher (29), the pin (24) passing through the first shaft (20).
- The drive mechanism (10) for disconnecting a switch according to claim 6, wherein the pin (24) is engaged in a bush (26) having a plurality of engagement slots (25) for preventing movement of the first shaft (20) and the second shaft (60).
- The drive mechanism (10) for disconnecting a switch according to claim 7, wherein the engagement slots (25) on the bush (26) are arranged such that the pin (24) is aligned at a position corresponding to the two or more positions.
- The drive mechanism (10) for disconnecting a switch according to any of the claims 7 and 8, wherein the bush (26) comprises a plurality of extension (27) for preventing the second shaft (60) to rotate beyond the two or more positions.
- The drive mechanism (10) for disconnecting a switch according to any of the claims 1 to 9, further comprising a second pin (34) engaged in a slot on the handle (30).
- The drive mechanism (10) for disconnecting a switch according to any of the claims 1 to 10, wherein the assembly (45) comprises a first lever (41) and a second lever (43) for transferring a motion from the first shaft (20) to the rotary bushing (44) and the coupler (46) inside the second shaft (60).
- The drive mechanism (10) for disconnecting a switch according to claim 11, wherein the extension (40) of the first shaft (20) is coupled to the first lever (41) for transferring the motion from the first shaft (20) to the second shaft (60).
- The drive mechanism (10) for disconnecting a switch according to claims 11 or 12, wherein the first lever (41) is mechanically coupled to the second lever (43) on the rotary bushing (44), the rotary bushing (44) mechanically coupled the second shaft (60).
- The drive mechanism (10) for disconnecting a switch according to any of the claims 1 to 13, wherein the two or more positions comprise a first position (100), a second position (300) and an intermediate position (200) between the first position (100) and the second position (300).
- The drive mechanism (10) for disconnecting a switch according to any of the claims 1 to 14, wherein the second shaft (60) comprises one or more contact blades (62) for contacting with one or more contacts (50,52).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IN375KO2013 | 2013-04-03 |
Publications (2)
Publication Number | Publication Date |
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EP2787519A1 true EP2787519A1 (en) | 2014-10-08 |
EP2787519B1 EP2787519B1 (en) | 2016-10-19 |
Family
ID=50276942
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14158829.3A Active EP2787519B1 (en) | 2013-04-03 | 2014-03-11 | Drive mechanism for disconnecting a switch |
Country Status (2)
Country | Link |
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EP (1) | EP2787519B1 (en) |
ES (1) | ES2608832T3 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105280427A (en) * | 2015-11-27 | 2016-01-27 | 国家电网公司 | Single-phase isolation switch and isolation switch using same |
CN106531535A (en) * | 2016-12-25 | 2017-03-22 | 中山弗雷德机械有限公司 | Mechanical interlocking device |
CN107316773A (en) * | 2017-07-11 | 2017-11-03 | 江苏镇德电力设备有限公司 | A kind of earthing knife-switch interlock connector |
CN110970242A (en) * | 2019-12-31 | 2020-04-07 | 德布森电气(上海)有限公司 | Rotary energy storage operating mechanism capable of operating in two directions |
WO2020253891A1 (en) * | 2019-06-15 | 2020-12-24 | Gualdron Florez Jesus | Disconnecting switchgear for electrical safety procedure and compliance with the five golden rules of electrical safety via a single switch |
EP3872941A1 (en) * | 2020-02-28 | 2021-09-01 | Siemens Aktiengesellschaft | Operating unit for an earthing switch of an air-insulated switchgear |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1684148A (en) * | 1926-02-19 | 1928-09-11 | Westinghouse Electric & Mfg Co | Disconnecting switch |
DE4313650A1 (en) * | 1993-04-21 | 1994-10-27 | Siemens Ag | Drive device for a disconnector or earthing switch in a switch panel |
US20040045937A1 (en) * | 2002-09-11 | 2004-03-11 | Hoglund Justin R. | Isolation switch for electric power systems |
DE102006041366B3 (en) * | 2006-08-28 | 2008-01-24 | Siemens Ag | Interlocking device for electronic switchgear, has activation slide movable in opposite direction under mechanical action of separating part of circuit breaker for pivoting lever from sleeve and for releasing access to cylinder of drive |
EP2339603A2 (en) * | 2009-12-23 | 2011-06-29 | LS Industrial Systems Co., Ltd | Interlock apparatus of ground switch for vacuum circuit breaker |
-
2014
- 2014-03-11 ES ES14158829.3T patent/ES2608832T3/en active Active
- 2014-03-11 EP EP14158829.3A patent/EP2787519B1/en active Active
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US1684148A (en) * | 1926-02-19 | 1928-09-11 | Westinghouse Electric & Mfg Co | Disconnecting switch |
DE4313650A1 (en) * | 1993-04-21 | 1994-10-27 | Siemens Ag | Drive device for a disconnector or earthing switch in a switch panel |
US20040045937A1 (en) * | 2002-09-11 | 2004-03-11 | Hoglund Justin R. | Isolation switch for electric power systems |
DE102006041366B3 (en) * | 2006-08-28 | 2008-01-24 | Siemens Ag | Interlocking device for electronic switchgear, has activation slide movable in opposite direction under mechanical action of separating part of circuit breaker for pivoting lever from sleeve and for releasing access to cylinder of drive |
EP2339603A2 (en) * | 2009-12-23 | 2011-06-29 | LS Industrial Systems Co., Ltd | Interlock apparatus of ground switch for vacuum circuit breaker |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105280427A (en) * | 2015-11-27 | 2016-01-27 | 国家电网公司 | Single-phase isolation switch and isolation switch using same |
CN106531535A (en) * | 2016-12-25 | 2017-03-22 | 中山弗雷德机械有限公司 | Mechanical interlocking device |
CN107316773A (en) * | 2017-07-11 | 2017-11-03 | 江苏镇德电力设备有限公司 | A kind of earthing knife-switch interlock connector |
WO2020253891A1 (en) * | 2019-06-15 | 2020-12-24 | Gualdron Florez Jesus | Disconnecting switchgear for electrical safety procedure and compliance with the five golden rules of electrical safety via a single switch |
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 (en) * | 2019-12-31 | 2020-04-07 | 德布森电气(上海)有限公司 | Rotary energy storage operating mechanism capable of operating in two directions |
EP3872941A1 (en) * | 2020-02-28 | 2021-09-01 | Siemens Aktiengesellschaft | Operating unit for an earthing switch of an air-insulated switchgear |
Also Published As
Publication number | Publication date |
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EP2787519B1 (en) | 2016-10-19 |
ES2608832T3 (en) | 2017-04-17 |
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