CN103310962A - A tap changer and a method related thereto - Google Patents
A tap changer and a method related thereto Download PDFInfo
- Publication number
- CN103310962A CN103310962A CN2013100713748A CN201310071374A CN103310962A CN 103310962 A CN103310962 A CN 103310962A CN 2013100713748 A CN2013100713748 A CN 2013100713748A CN 201310071374 A CN201310071374 A CN 201310071374A CN 103310962 A CN103310962 A CN 103310962A
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- wheel
- tap changer
- fixed contact
- tap
- stopper unit
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000008859 change Effects 0.000 claims description 18
- 238000009434 installation Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000001413 cellular effect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
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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
- H01H9/0005—Tap change devices
- H01H9/0027—Operating mechanisms
- H01H9/0033—Operating mechanisms with means for indicating the selected tap or limiting the number of selectable taps
-
- 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
- H01H3/44—Driving mechanisms, i.e. for transmitting driving force to the contacts using Geneva movement
Landscapes
- Automatic Tool Replacement In Machine Tools (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Housings And Mounting Of Transformers (AREA)
- Switch Cases, Indication, And Locking (AREA)
Abstract
The invention relates to a tap changer with a diverter switch and a tap selector. The tap selector has a plurality of fixed contacts and a pair of fine selector arms with a movable contact for selective engagement with any one of the fixed contacts. The tap changer includes an end location stop device having a locking link (37) and a rotatable wheel (34). The wheel (34) is arranged to turn a certain angle when the fine selector arm moves from one fixed contact to an adjacent fixed contact. On one side, the wheel (34) is provided with a first end stop unit (43a) arranged to abut the locking link (37) when the fine selector arm moves beyond a first end contact of the fixed contacts. The locking link (37) is arranged to lock drive of the diverter switch when the first end stop unit (43a) abuts the locking link 37). According to the invention, the wheel (34) includes a plurality of mounting means (36) at different angular positions for the first end stop unit (43a). The invention also relates to a method for arranging an end stop limitation device on such a tap changer.
Description
Technical field
First aspect present invention relates to a kind of tap changer that comprises change over switch and capability of tap selector, this capability of tap selector has a plurality of fixed contacts and a pair of accurate selector arm, this selector arm has for the movable contact that optionally engages with any one fixed contact of this fixed contact, wherein, this tap changer comprises the end position stopper equipment with lock link and rotatable wheel, this is taken turns to be arranged to and rotate special angle when this precision selector arm moves to adjacent fixed contact from a fixed contact, and this wheel has first end stopper unit in an one side, this first end stopper unit is arranged to when this precision selector arm is moved beyond the first end contact of this fixed contact in abutting connection with this lock link, thereby this lock link is arranged to the driving that locks this change over switch when this this lock link of first end stopper cell abutment.
In second aspect, the present invention relates to a kind of method of end position stopper of tap changer of the type for arranging foregoing description.
Background technology
Tap changer is generally used for and being connected in order to change its interconversion rate of transformer.In having the transformer of tap changer, a winding in the transformer has the number of turn that is connected to circuit of fixed qty.Other windings have a fixed connection point, thereby can select another tie point among a large amount of fixed contacts, to obtain required voltage.Selectable fixed contact can be along being positioned at each other back with 70% to the 100% corresponding part of extending fully of winding.
After the load that is connected to transformer changes or owing to other influences, may need to change tie point.Usually in response to parameter sensing, automatically trigger the demand that changes tapping point.Tap changes and to comprise that a plurality of operations, this operation for example comprise via spring and load accumulator disconnection and Closing Switch and accurate selector arm is moved to new fixed contact.Must carry out these operations according to specific order and according to the special time relation.
Tap changes operation and comprises that the connection from a tie point to adjacent tie point changes.This is by be used for setting up the accurate selector arm execution that contacts with separately fixed contact.
In delegation's fixed contact, have first end contact and the second end contact in minute other end of this row.When accurate selector arm is connected to one of them this contact, end, in particular case, may there be the risk that provides the actuation instructions that is moved beyond this contact, end, the result damages tap changer.This may occur in the situation of the mistake installation of equipment or the erroneous matching between capability of tap selector and the change over switch, wherein delivery component discretely in many cases.For fear of like this, knownly provide a kind of and have be used to the capability of tap selector that prevents from operating above the end position stopper of contact, end.This end position stopper is embodied as for example this precision selector arm of Geneva type wheel actuating usually, thereby this wheel moves the rotation special angle for each from a fixed contact to adjacent fixed contact of this precision selector arm.End position stopper on this is taken turns can comprise being installed in this and taking turns and be arranged to this rotation of taking turns is restricted to a pair of stopper unit less than 360 degree.
The illustrative example of end position stopper is disclosed in US5165295, US6060669 and US7750257.
The quantity of the fixed contact in the tap changer changes between different models and size.The quantity of fixed contact is usually in 5 to 35 scope, thereby the tap changer with a large amount of fixed contacts usually also has in advance and selects.This means that the end position stopper has the different designs for the fixed contact of varying number.The needs that have in this respect different designs for the different tap changers in the model scope cause the manufacturing that depends on the circumstances.
By being mechanically connected to tap changer so that the operating equipment of the driving of the actuating of tap changer drives tap changer.For security reasons, this operating equipment usually also has the end restriction is set.Owing to an identical operating equipment can be connected to the tap changer of dissimilar or size, usually be arranged to and make it can be connected to the tap changer of the fixed contact with varying number so the end of operating equipment arranges restriction.
Representative instance that this end arranges restriction is disclosed in US2011/005816.This end stopper arranges restriction and has an indicator wheel, and this indicator wheel has be used to the trigger with the movement of angle that limits this indicator wheel, because this trigger hits the trigger dish at the end position place.Can select by this trigger being inserted selected hole in this indicator wheel the angle position of this trigger.
But the flexibility that the operating equipment of realizing like this is adapted to different tap changers can't solve the requirement for the various designs of the end position stopper of the tap changer of the fixed contact of varying number.
Summary of the invention
The object of the invention is to overcome the above-mentioned shortcoming relevant with end position stopper in the tap changer, therefore and obtain a kind of like this tap changer, wherein the end position stopper of this tap changer fixed contact quantity of Adaptive change easily.
Realize this purpose according to the present invention, because the tap changer of the sort of type of appointment comprises specific features in the introduction of specification: the wheel of end position stopper comprises a plurality of erecting devices at the Difference angles place that is used for first end stopper unit.
When accurate selector arm receives order when being moved beyond the first end contact of fixed contact, first end stopper unit prevents from switching.Owing to can select the angle installation site of stopper unit, end by selecting this any erecting device in taking turns, so can in the tap changer of the fixed contact with varying number, use identical end position stopper.This reduces makes and assembly cost.Need a small amount of article, and may assemble at product structure and in the manufacture process middle and later periods.Because reduced the quantity of the article in built-up time and the storage, production cost will be lower.
Preferred implementation according to tap changer of the present invention, this is taken turns has the second end stopper unit, this the second end stopper unit is arranged to when this precision selector arm is moved beyond the second end contact of this fixed contact in abutting connection with this lock link, thereby this lock link is arranged to the driving that locks this change over switch when this this lock link of the second end stopper cell abutment.
Utilize this execution mode also to prevent from activating the second end contact above this fixed contact.Thereby, in both direction, obtain end position stopper function by same identical device.
According to another preferred implementation, this takes turns a plurality of erecting devices that also are used for this second end stopper unit that are included in different angular position.
Thereby the further flexibility that increases for the tap changer adaptation end position stopper of the fixed contact with varying number.
According to another preferred implementation, this is taken turns is the Geneva wheel.
This is taken turns thereby is arranged to by geneva mechanism and drives, and this geneva mechanism is specially adapted to realize the stepping rotary moving.
According to another preferred implementation, this Geneva wheel has at least 36 driver slots.
Utilize the driver slot of this quantity, this end position stopper equipment will be applicable to up to 35 fixed contacts.Therefore this equipment covers a kind of like this scope of the quantity of fixed contact, wherein almost all tap-changer operation in this scope.
According to another preferred implementation, this takes turns at least 36 erecting devices that are included in different angular position.
This execution mode also is specially adapted to apply the present invention to the scope of the quantity of the fixed contact used in most of situation.
According to another preferred implementation, all erecting device is mutually the same.
This simplifies stopper unit, end to the installation of each selected erecting device.
According to another preferred implementation, all erecting device is positioned on the identical radius.
This provides the unified design of wheel and has simplified its manufacturing.Cooperation between stopper unit on any angular position of separately stopper unit and lock link is also with identical.
According to another preferred implementation, each erecting device is the axial hole of taking turns through this.
This is provided for installing the very easy method of each stopper unit, end in an erecting device.Axially relate to the axle that this is taken turns here.
According to another preferred implementation, each stopper unit, end be screw and each hole by screw thread in order to cooperate with it.
Thereby in the selected hole that can each end stopper cellular installation be taken turns to this with very easy method.By screw thread, stopper unit, end will be fixed on the appropriate location.
According to another preferred implementation, around the pivot parallel with this axle of taking turns this lock link is installed pivotally, wherein this pivot is positioned at the outside of this periphery of taking turns, wherein this lock link has with this and takes turns adjacent free end on this such side of taking turns, wherein each stopper unit, end is positioned on this side, and wherein free end radially arrives the inside of the position of each erecting device.
Thereby when this lock link was hit to lock the driving of this change over switch by stopper unit, an end, this lock link can transmit movement with simple mode.
The invention still further relates to a kind of transformer, this transformer comprises according to tap changer of the present invention, particularly, relates to the tap changer according to any one preferred implementation of the present invention.
According to a second aspect of the invention, the method that describes in detail in the introduction of this specification comprises adaptation end position stopper device to be used for the fixed contact of varying number, and this adaptation comprises following concrete steps:
-provide and take turns and first end stopper unit,
-a plurality of erecting devices are arranged in this take turns,
-the quantity that depends on the fixed contact in this capability of tap selector is selected an erecting device in this erecting device,
-with this first end stopper cellular installation on selected erecting device.
According to preferred implementation, according to of the present invention, particularly, carry out the method on the tap changer according to any one preferred implementation of the present invention.
Transformer of the present invention has the advantage identical with the advantage of tap changer of the present invention and its preferred implementation with method of the present invention, has wherein above described the advantage of tap changer of the present invention and its preferred implementation.
Describe in the dependent claims above-mentioned preferred implementation of the present invention in detail.To be appreciated that, any possible combination by above-mentioned preferred implementation and any possible combination by the feature described in the description of these execution modes and hereinafter example can consist of further preferred embodiment certainly.
With the following detailed description by an example of the present invention and come with reference to the accompanying drawings further to explain the present invention.
Description of drawings
Fig. 1 a-1c schematically illustrates according to tap changer of the present invention.
Fig. 2 is the end-view of major part of the end position stopper of the tap changer among Fig. 1 a-1c.
Fig. 3 is the engineer's scale amplification profile along the line III-III of Fig. 2.
Embodiment
Fig. 1 a-1c schematically illustrates tap changer.Fig. 1 a is the single-phase figure of a kind of like this tap changer 100 of being applicable to of equipment according to the present invention.Tap changer 100 is connected to the adjusting winding of transformer and has one group of different tap 102, and in this case, the quantity of tap is 16, but this quantity can be some other quantity from 5 to 35 any amount for example.The tap changer of Fig. 1 a be the change over switch type and comprise change over switch 120 and capability of tap selector 110.
The capability of tap selector 110 of Fig. 1 utilizes to be selected to operate with accurate the selection in advance, and therefore comprises in advance selector arm 51 and accurate selector arm 101.Operate in advance selector arm 51 and accurate selector arm 101 by the rotary moving separately shown in Fig. 1 b and the 1c.Selector arm 51 can move between two fixed contacts in advance, and can be so that any contact of each accurate selector arm 101 and 5 to 9 different fixed contacts.In advance therefore nearly 35 different taps of expression of the integrated positioning of selector arm 51 and accurate selector arm 101.
Fig. 2 is the end-view that illustrates according to the primary clustering of the end position stopper of an example of the present invention.Centering on axle 49 rotatable installation forms is the wheel 34 of Geneva wheel.The Geneva wheel has a plurality of driver slots 35.In the example shown, the quantity of driver slot 35 is 36.Drive the Geneva wheel by the gear 31 that is installed to for the axle 30 that drives the selector arm (not shown).Chain 32 arrives Geneva driving wheel 33 with the rotary drive of gear 31, and Geneva driving wheel 33 is in the Geneva driving with the groove 35 of Geneva wheel 34 and is connected.
Geneva wheel 34 has a plurality of erecting devices 36 for stopper unit, end 43a, 43b.In this example, each erecting device is to extend axially by Geneva wheel 34 and be positioned at screwed hole 36 on the common circle.In the figure, first end stopper unit 43a is installed among the 36a of hole and the second end stopper unit 43b is installed among the 36b of hole.
When axle 30 moves selector arm when moving a step, take turns 34 driving to Geneva and connect and cause this Geneva wheel to rotate a groove step in the mobile determined direction of direction at selector arm.If groove step of rotation in Geneva wheel 34 clockwise direction in the figure, then end stopper unit 36a will be towards lock link 37 with the mobile corresponding angle in angle ground.After the movement of some accurate selector arms (wherein this movement accounts for leading in a direction), stopper unit, end 43a will be near lock link 37.When accurate selector arm has arrived the contact, an end of fixed contact, stopper unit, end 43a will be placed as near lock link 37.Be moved further in equidirectional namely at the order tap changer and surpass in the situation of contact, end, being further rotated of Geneva wheel will cause stopper unit, end 43a in abutting connection with the free end 39 of lock link 37.This causes lock link 37 to be rotated around its pivot 38 and activates driving lock 42 via kinematic link, thereby stops the actuating of change over switch.
Correspondingly, another stopper unit, end 43b acts on the lock link 37 in the opposite direction when arriving the contact, end of the other end.
Stopper unit, end 43a in the figure, the position of 43b are applicable to 35 fixed contacts.For the use in the application still less of fixed contact quantity, stopper unit, end 43a, 43b are installed in other holes 36, and wherein other holes 36 have the position that is applicable to this fixed contact quantity.If the quantity of fixed contact is 29, then end stopper unit 43a, 43b are installed in respectively among hole 36c and the 36d.About 21 fixed contacts, hole 36a, 36f will be for mounting end stopper unit 43a, 43b, and be like that.
Fig. 3 is the profile along the line III-III of Fig. 2.Hole 36a has screw thread 45, and stopper unit, end 43a is manufactured the screw with corresponding screw thread 47.The head 48 of screw 43a is the parts that are arranged in abutting connection with locking lever 37.
Claims (14)
1. a tap changer (100), comprise change over switch (120) and capability of tap selector (110), described capability of tap selector (110) has a plurality of fixed contacts (102) and a pair of accurate selector arm (101), described accurate selector arm has the movable contact that engages for any one fixed contact selectivity of described fixed contact (102), wherein, described capability of tap selector comprises the end position stopper equipment of have lock link (37) and rotatable wheel (34), the described wheel (34) is arranged to and rotates special angle when described accurate selector arm (101) moves to adjacent fixed contact from a fixed contact, and wherein, the described wheel (34) has first end stopper unit (43a) in the one side, described first end stopper unit is arranged to when described accurate selector arm (101) is moved beyond the first end contact of described fixed contact (102) in abutting connection with described lock link (37), thereby described lock link (37) is arranged to the driving that locks described change over switch (120) when described first end stopper unit (43a) the described lock link of adjacency (37), it is characterized in that, the described wheel (34) comprises a plurality of erecting devices (36) for described first end stopper unit (43a), wherein, described erecting device (36) is positioned at different angular position.
2. tap changer according to claim 1 (100), it is characterized in that, the described wheel (34) has the second end stopper unit (43b) in a described side, described the second end stopper unit is arranged to adjacency described lock link (37) when described accurate selector arm (101) is moved beyond the second end contact of described fixed contact (102), thereby described lock link (37) is arranged to the driving that locks described change over switch (120) when described the second end stopper unit (43b) the described lock link of adjacency (37).
3. tap changer according to claim 2 (100) is characterized in that, the described wheel (34) is included in a plurality of erecting devices (36) that different angular position also is used for described the second end stopper unit (43b).
4. the described tap changer of any one (100) in 3 according to claim 1 is characterized in that, the described wheel is Geneva wheel (34).
5. tap changer according to claim 4 (100) is characterized in that, described Geneva wheel (34) has at least 36 driver slots (35).
6. the described tap changer of any one (100) in 5 according to claim 1 is characterized in that, the described wheel (34) is included at least 36 erecting devices (36) of different angular position.
7. the described tap changer of any one (100) in 6 according to claim 1 is characterized in that, all erecting devices (36) are mutually the same.
8. the described tap changer of any one (100) in 7 according to claim 1 is characterized in that, all erecting devices (36) are positioned on the identical radius.
9. the described tap changer of any one (100) in 8 according to claim 1 is characterized in that, each erecting device is through the axial hole of described wheel the (34) (36).
10. tap changer according to claim 9 (100) is characterized in that, each stopper unit, end be screw (43a, 43b) and described each hole (36) by screw thread in case with it cooperate.
11. the described tap changer of any one (100) in 10 according to claim 1, it is characterized in that, around the pivot (38) parallel with the described axle (49) of described wheel the (34) described lock link (37) is installed pivotally, wherein, described pivot (38) is positioned at the outside of the described periphery of described wheel the (34), wherein, described lock link (37) has free end (39) on the such side of described take turns (34) adjacent with described wheel the (34), wherein, each stopper unit, end (43a, 43b) be positioned on the described side, wherein said free end (39) radially arrives the inside of the position of each erecting device (36).
12. a transformer is characterized in that, described transformer comprises according to claim 1 the described tap changer of any one (100) in 11.
13. method that is used for the end position stopper equipment of layout tap changer (100), wherein, described tap changer (100) is the described type that comprises change over switch (120) and capability of tap selector (110), wherein, described capability of tap selector (110) has a plurality of fixed contacts (102) and accurate selector arm (101), described accurate selector arm has the movable contact that engages for any one fixed contact selectivity of described fixed contact (102), wherein, described capability of tap selector (100) comprises the end position stopper equipment of have lock link (37) and rotatable wheel (34), the described wheel (34) is arranged to and rotates special angle when described accurate selector arm (101) moves to adjacent fixed contact from a fixed contact, and described wheel the (34) has first end stopper unit (43a), described first end stopper unit is arranged to when described accurate selector arm (101) is moved beyond the first end contact of described fixed contact (102) in abutting connection with described lock link (37), thereby described lock link (37) is arranged to the driving that locks described change over switch (120) when described first end stopper unit (43a) the described lock link of adjacency (37), it is characterized in that, adjust described end position stopper equipment to be used for the fixed contact (102) of varying number, wherein adjustment may further comprise the steps:
-provide described to take turns (34) and described first end stopper unit (43a),
-a plurality of erecting devices (36) are arranged on described wheel the (34),
-the quantity that depends on the fixed contact (102) in the described capability of tap selector (110) is selected the erecting device (36) in the described erecting device (36),
-described first end stopper unit (43a) is installed on the selected erecting device (36).
14. method according to claim 13 is characterized in that, carries out described mode by the described tap changer of any one (100) in 12 according to claim 1.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20120158241 EP2637185B1 (en) | 2012-03-06 | 2012-03-06 | A tap changer and a method related thereto |
| EP12158241.5 | 2012-03-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103310962A true CN103310962A (en) | 2013-09-18 |
| CN103310962B CN103310962B (en) | 2017-07-25 |
Family
ID=45841266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310071374.8A Active CN103310962B (en) | 2012-03-06 | 2013-03-05 | Tap changer and the method related to tap changer |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2637185B1 (en) |
| CN (1) | CN103310962B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104575994A (en) * | 2013-10-18 | 2015-04-29 | Abb技术有限公司 | Transformer |
| CN114072890A (en) * | 2019-07-01 | 2022-02-18 | 日立能源瑞士股份公司 | Drive device for a tap changer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1039129B (en) * | 1954-04-02 | 1958-09-18 | Siemens Ag | Step switching devices with intermittent gears for step change gears of regulating transformers |
| US6693247B1 (en) * | 2000-06-09 | 2004-02-17 | Mcgraw-Edison Company | Load tap changer with direct drive and brake |
| WO2005122198A1 (en) * | 2004-06-03 | 2005-12-22 | Cooper Technologies Company | Molded polymer load tap changer |
| CN102077308A (en) * | 2008-08-01 | 2011-05-25 | 赖茵豪森机械制造公司 | Manual drive for a tap changer for tap-changing transformers |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4009503A1 (en) | 1990-03-24 | 1991-09-26 | Reinhausen Maschf Scheubeck | STEPPER TRANSMISSION FOR STEPPERS OF STEPPING TRANSFORMERS |
| DE19743864C1 (en) | 1997-10-04 | 1999-04-15 | Reinhausen Maschf Scheubeck | Tap changer |
| CN101944407A (en) | 2009-07-07 | 2011-01-12 | 群康科技(深圳)有限公司 | Conducting plate and manufacturing method thereof |
-
2012
- 2012-03-06 EP EP20120158241 patent/EP2637185B1/en active Active
-
2013
- 2013-03-05 CN CN201310071374.8A patent/CN103310962B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1039129B (en) * | 1954-04-02 | 1958-09-18 | Siemens Ag | Step switching devices with intermittent gears for step change gears of regulating transformers |
| US6693247B1 (en) * | 2000-06-09 | 2004-02-17 | Mcgraw-Edison Company | Load tap changer with direct drive and brake |
| WO2005122198A1 (en) * | 2004-06-03 | 2005-12-22 | Cooper Technologies Company | Molded polymer load tap changer |
| CN102077308A (en) * | 2008-08-01 | 2011-05-25 | 赖茵豪森机械制造公司 | Manual drive for a tap changer for tap-changing transformers |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104575994A (en) * | 2013-10-18 | 2015-04-29 | Abb技术有限公司 | Transformer |
| CN114072890A (en) * | 2019-07-01 | 2022-02-18 | 日立能源瑞士股份公司 | Drive device for a tap changer |
| CN114072890B (en) * | 2019-07-01 | 2024-02-13 | 日立能源有限公司 | Drive device for tap changer |
| US11984288B2 (en) | 2019-07-01 | 2024-05-14 | Hitachi Energy Ltd | Drive arrangement for a tap changer |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2637185B1 (en) | 2014-01-15 |
| EP2637185A1 (en) | 2013-09-11 |
| CN103310962B (en) | 2017-07-25 |
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Effective date of registration: 20180507 Address after: Baden, Switzerland Patentee after: ABB Switzerland Co.,Ltd. Address before: Zurich Patentee before: ABB TECHNOLOGY Ltd. |
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