CN113192775B - Contact assembly for on-load voltage regulating switch - Google Patents
Contact assembly for on-load voltage regulating switch Download PDFInfo
- Publication number
- CN113192775B CN113192775B CN202110456271.8A CN202110456271A CN113192775B CN 113192775 B CN113192775 B CN 113192775B CN 202110456271 A CN202110456271 A CN 202110456271A CN 113192775 B CN113192775 B CN 113192775B
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- Prior art keywords
- contact
- fixed
- rod
- movable
- movable contact
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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
- H01H9/0016—Contact arrangements for tap changers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
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- 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
-
- 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
- H01H9/0044—Casings; Mountings; Disposition in transformer housing
-
- 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
- H01H9/0044—Casings; Mountings; Disposition in transformer housing
- H01H2009/005—Details concerning the sealing of the oil filled casings
Abstract
The invention discloses a contact assembly for an on-load voltage regulating switch, which comprises a fixed contact and a movable contact, wherein the fixed contact is arranged in a fixed frame, two rotating frames which rotate synchronously are arranged in the fixed frame, the movable contact is rotatably connected to a movable rod through a conductive sliding ring, the movable rod is fixedly connected with a fixed rod, two sides of the fixed rod are provided with limiting plates for limiting the position of the movable contact, a gap is arranged between two sides of each limiting plate and the movable contact, an elastic part is arranged in the gap, the movable contact drives the rotating frames to rotate, when the rotating frames rotate, the fixed contact is far away from the movable contact, and when the movable contact moves between the two rotating frames, the fixed contact is contacted with the movable contact.
Description
Technical Field
The invention relates to the technical field of on-load tap changers, in particular to a contact assembly for an on-load tap changer.
Background
The on-load tap changer is a voltage regulating device which is suitable for being operated under the excitation or the load of a transformer and is used for changing the tapping connection position of a transformer winding. The basic principle is to realize the switching between taps in the transformer winding under the condition of ensuring that the load current is not interrupted, thereby changing the number of turns of the winding, namely the voltage ratio of the transformer, and finally realizing the purpose of voltage regulation. Under the scene of large voltage fluctuation, the on-load tap changer is utilized, so that the user voltage can be stabilized in a reasonable range, and the safety and economy of power utilization are ensured.
The existing on-load tap changer has the problems of mechanical wear, electric corrosion, serious pollution and the like due to the fact that a fixed contact and a fixed contact are in sliding contact, frequent voltage regulation of the on-load tap changer is easy to generate, particularly, in the on-load tap changer which runs in a transformer with large load current, the elasticity of a spring is weakened due to the heat effect of the current, the contact pressure between the movable contact and the fixed contact is reduced, the contact resistance is increased, the heat productivity between the contacts is increased, the oxidation corrosion and the mechanical deformation on the surface of the contacts are accelerated, vicious circle is formed, and the damage of the tap changer is accelerated.
Disclosure of Invention
In view of this, the present invention provides a contact assembly for an on-load voltage regulating switch, which aims to overcome the defects in the prior art, wherein friction generated when a moving contact and a stationary contact are contacted and separated is small, friction damage between the moving contact and the stationary contact is effectively reduced, and the service life of the voltage regulating switch is prolonged.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a contact subassembly for on-load voltage regulating switch, includes static contact and moving contact, the static contact sets up in the mount, set up two synchronous revolution's rungs in the mount, the moving contact rotates through electrically conductive sliding ring and connects on the carriage release lever, the dead lever of quiet connection on the carriage release lever, the dead lever both sides set up the limiting plate of restriction moving contact position, set up the space between limiting plate both sides and the moving contact, set up the elastic component in the space, moving contact drive runing rest is rotatory, when the runing rest is rotatory, the moving contact is kept away from to the static contact, when the moving contact moved between two runing rests, static contact and moving contact.
Furthermore, the swivel mount includes montant and a plurality of horizontal poles of parallel arrangement on the montant, the montant rotates through the pivot to be connected on the mount, set up the torsional spring between montant and the pivot, the horizontal pole tip that is located the top salient static contact, the horizontal pole tip that is located the lower part contacts with the static contact, set up extension spring between static contact and the mount, extension spring is perpendicular with the montant.
Further, the end of the cross rod is provided with a roller, and the peripheral surface of the roller is respectively contacted with the static contact and the fixed rod.
Furthermore, the elastic part is a compression spring, and the compression spring is statically connected to the limiting plate.
Furthermore, a transverse plate is arranged below the static contact, the bottoms of the two sides of the static contact are provided with a first bulge, the transverse plate is provided with a sliding groove for limiting the moving track of the static contact, and the first bulge is positioned in the sliding groove.
Furthermore, the torsion directions of the two torsion springs are opposite, and the cross rod is rotatably connected with the connecting rod.
Further, set up the outer tube on the limiting plate, the elastic component sets up in the outer tube, the interior pole is connected to the elastic component, interior pole is pegged graft in the outer tube, set up the opening on the outer tube, the opening part is sealed by the closed door that outwards opens, the angle that the closed door was opened is less than 90, set up the weeping hole on the closed door 21.
The invention has the beneficial effects that:
1. the invention provides a contact assembly for an on-load voltage-regulating switch, wherein a moving contact 2 drives two rotating frames to synchronously rotate, the rotating frames rotate inwards, a static contact is far away from the moving contact under the traction of an extension spring, the moving contact continuously moves until the moving contact moves between the two rotating frames, at the moment, the rotating frames rapidly rotate under the action of a torsion spring, the static contact is close to the moving contact and is tightly attached to the moving contact under the drive of the rotating frames, and friction cannot occur between the moving contact and the static contact in the contact process of the moving contact and the static contact.
2. When moving contact and static contact closely laminate, produce static friction between the two, when needing the pressure regulating, the carriage release lever removes, because there is static friction between the sound contact, only the carriage release lever removed this moment, the elastic component compression of one side wherein, the carriage release lever drive swivel mount is rotatory, the static contact keeps away from the moving contact under extension spring's pulling force, realizes the separation of the two, in the in-process of the two separation, only the static contact can produce the friction with the moving contact separation for a moment, wearing and tearing are less.
3. The limiting plate is provided with an outer pipe, the elastic part is arranged in the outer pipe, the elastic part is connected with the inner rod 25, the inner rod 25 is inserted in the outer pipe, the outer pipe is provided with an opening, the opening is sealed by a sealing door with an outward opening, the sealing door is provided with a liquid leakage hole, when the elastic part is compressed, transformer oil flows out through the opening, when the pressure applied to the elastic part is removed, the sealing door is closed, the transformer oil can only flow in through the liquid leakage hole in the sealing door, the elastic part can not deform immediately, friction can not be generated when the moving and static contacts are separated, and the moving and static contacts are effectively protected.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;
fig. 2 is an installation schematic view of a static contact;
FIG. 3 is a schematic view of the structure of FIG. 2 from another angle;
FIG. 4 is a schematic view of the installation of the movable contact;
FIG. 5 is a schematic view of the installation of the torsion spring;
FIG. 6 is a schematic structural diagram of a second embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a third embodiment of the present invention;
FIG. 8 is a schematic view of the installation of the closure door;
the device comprises a fixed contact 1, a movable contact 2, a fixed support 3, a rotating support 4, a conductive slip ring 5, a movable rod 6, a fixed rod 7, a limiting plate 8, an elastic part 9, a vertical rod 10, a transverse rod 11, a rotating shaft 12, a torsion spring 13, a tension spring 14, a roller 15, a transverse plate 16, a convex first 17, a sliding chute 18, a connecting rod 19, an outer tube 20, a closed door 21, a liquid leakage hole 22, a convex second 23, an insulating first 24, an inner rod 25, a spring hinge 26 and an insulating second 27.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1-5, a first embodiment of the present invention is a contact assembly for an on-load voltage regulating switch, which includes a fixed contact 1 and a movable contact 2, wherein the fixed contact 1 is disposed in a fixed mount 3, the fixed mount 3 is a rectangular parallelepiped shell-shaped structure with an opening on a side surface, and a horizontal plate 16 is disposed below the fixed contact 1.
Two synchronously rotating frames 4 are arranged in a fixed frame 3, as shown in fig. 2 and fig. 3, each rotating frame 4 comprises a vertical rod 10 and three transverse rods 11 which are arranged on the vertical rod 10 in parallel, the vertical rod 10 is rotatably connected to the fixed frame 3 through a rotating shaft 12, the rotating shaft 12 is vertically welded between the inner top surface of the fixed frame 3 and a transverse plate 16, two bearings are bonded on the rotating shaft 12, a cleaning hole is vertically penetrated through the vertical rod 10, the peripheral surface of each bearing is bonded in the cleaning hole, a torsion spring 13 is arranged between the vertical rod 10 and the rotating shaft 12, the torsion spring 13 is sleeved on the rotating shaft 12, one end of the torsion spring is fixed on the rotating shaft 12 in a welding mode and the like, a second bulge 23 is fixedly arranged in the cleaning hole, the second bulge 23 is contacted with the other end of the torsion spring 13 when rotating to one side along with the rotating frame 4, and is far away from the other end of the torsion spring 13 when rotating to the other side, and as shown in fig. 5, the torsion directions when the torsion springs 13 on the two rotating shafts 12 generate elastic potential energy are opposite; the connecting rod 19 is rotatably connected between the cross rods 11 at the top, round holes are machined in two ends of the connecting rod 19, pin shafts are inserted in the round holes, the bottoms of the pin shafts are welded on the top surfaces of the cross rods 11 at the top, at the moment, the two rotating frames 4 rotate synchronously, and the end parts of the cross rods 11 at the top protrude out of the static contacts 1.
Two sides of the static contact 1 are fixed with an insulating sheet I24 in a bonding mode and the like, as shown in fig. 4, the static contact 1 is electrically connected with the lead through a conductive bolt, a stud of the conductive bolt is bonded with the fixed frame 3 through high-temperature-resistant insulating glue to form the extension spring 14, and at the moment, the extension spring 14 is perpendicular to the vertical rod 10. The bottom of the first insulating sheet 24 positioned on two sides is bonded with the first bulge 17, a sliding groove 18 for limiting the moving track of the static contact 1 is processed on the transverse plate 16, the first bulge 17 is positioned in the sliding groove 18, the bottom surface of the first bulge 17 is in sliding connection with the sliding groove 18, at the moment, the transverse plate 16 provides support for the first insulating sheet and the static contact 1, and when the first bulge 17 slides to the outermost side of the sliding groove 18, the static contact 1 is parallel to the back plate of the fixed frame 3 and protrudes out of the fixed frame 3.
The carriage release lever 6 is cylindrical structure, the moving contact 2 welds on leading electrical slip ring 5 and is connected with one side wire electricity of leading electrical slip ring 5, bonding insulating piece two 27 on the moving contact 2, leading electrical slip ring 5 rotates and connects on carriage release lever 6, through mode static connection dead lever 7 such as welding on the carriage release lever 6, dead lever 7 both sides are limiting plate 8 of moving contact 2 positions of integrated into one piece restriction respectively, be provided with the space between 8 both sides of limiting plate and the insulating piece two 27, set up elastic component 9 in the space, elastic component 9 is compression spring, compression spring static connection is on limiting plate 8 and perpendicular with limiting plate 8. The end surface of the moving contact 2 protrudes out of the limit plate 8.
The moving rod 6 moves forwards, the first insulating sheet 24 on one side drives the rotating frame 4 to rotate, the rotating frame 4 in contact with the first insulating sheet on one side is a driving rotating frame, the other rotating frame is a driven rotating frame, the two rotating frames rotate inwards from the position perpendicular to the static contact, as shown in fig. 1, the static contact 1 gradually moves away from the movable contact 2 under the traction of the tension spring 14, the movable contact 2 continues to move, a gap is always reserved between the movable contact 2 and the static contact 1, no friction occurs between the two rotating frames until the moving rod 6 moves to the position where the fixed rod 7 is separated from the rotating frame 4, the two rotating frames 4 rapidly rotate under the action of the torsion spring 13, the static contact 1 is close to the movable contact 2 under the drive of the rotating frame 4, the first protrusion 17 moves to the outermost side of the chute 18, the static contact 1 is tightly attached to the movable contact 2, no friction occurs between the two rotating frames in the contact process of the movable contact 1 and the static contact 1, the two torsion springs 13 generate the same direction of elastic potential energy, and a worker can adjust gears from different directions.
When moving contact 2 and static contact 1 closely laminate, the driven swivel mount laminates with the side of opposite side insulating piece 24 mutually, when needing the pressure regulating, carriage release lever 6 removes, because there is static friction force closely laminating between the sound contact 1, only carriage release lever 6 removes this moment, the elastic component 9 compresses, carriage release lever 6 drive swivel mount 4 is rotatory, moving contact 2 is kept away from to static contact 1 under extension spring 14's pulling force, realize the separation of the two, at the in-process of the separation of the two, only the moment that static contact 1 and moving contact 2 separated can produce the friction, wearing and tearing are little.
Example two
As shown in fig. 6, a second embodiment of the present invention is different from the first embodiment in that an upper lug and a lower lug are bonded to an end of a cross bar 11, a circular shaft is bonded between the lugs, a bearing is bonded to the circular shaft, a roller 15 is in a circular shell structure, an outer diameter of the roller 15 is larger than a width of the cross bar 11, an inner circumferential surface of the roller 15 is bonded to the bearing, at this time, the roller 15 can rotate freely, the outer circumferential surface of the roller 15 is in contact with a static contact 1 and a fixed rod 7 respectively, so as to reduce friction between the cross bar 11 and the static contact 1, the fixed rod 7 and the force required by the moving rod 6 during moving.
EXAMPLE III
As shown in fig. 7-8, a third embodiment of the present invention is, the present embodiment is different from the first embodiment in that a limiting plate 8 is bonded with an outer tube 20 having a rectangular parallelepiped shell-shaped structure, an elastic element 9 is disposed in the outer tube 20, the other end of the elastic element 9 is bonded with an inner rod 25 having a closed rectangular parallelepiped structure, the inner rod 25 is inserted into the outer tube 20, the outer wall of the inner rod 25 is in smooth and tight contact with the inner wall of the outer appearance, an opening is formed in the outer tube 20, the opening is closed by a closing door 21 that is open outward, the closing door 21 is hinged to the outer tube 20 through a spring hinge 26, an opening angle of the closing door 21 is smaller than 90 °, a liquid leakage hole 22 is formed in the closing door 21, when the elastic element 9 is compressed, transformer oil located between the outer tube 20 and the inner rod 25 is compressed, the closing door 21 is opened, the transformer oil flows out through the opening, when the transformer oil flows out, the pressure applied on the elastic element 9 is removed, the sealing door 21 is closed, the transformer oil can only flow in through a small through a through-hole, the small through-hole, the elastic element 21 cannot be deformed immediately, the moving contact 1 can hardly generate friction, and the moving contact 1 can be effectively protected, and the moving contact can be separated, thereby effectively protecting the moving contact 1.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. A contact assembly for an on-load voltage regulating switch comprises a fixed contact (1) and a movable contact (2), and is characterized in that the fixed contact (1) is arranged in a fixed frame (3), two rotating frames (4) which rotate synchronously are arranged in the fixed frame (3), the movable contact (2) is rotatably connected to a movable rod (6) through a conductive sliding ring (5), the movable rod (6) is statically connected with a fixed rod (7), limiting plates (8) for limiting the position of the movable contact (2) are arranged on two sides of the fixed rod (7), a gap is arranged between two sides of each limiting plate (8) and the movable contact (2), an elastic part (9) is arranged in the gap, the movable contact (2) drives the rotating frames (4) to rotate, when the rotating frames (4) rotate, the fixed contact (1) is far away from the movable contact (2), and when the movable contact (2) moves between the two rotating frames (4), the fixed contact (1) is in contact with the movable contact (2); the swivel mount (4) includes montant (10) and parallel arrangement and is in a plurality of horizontal poles (11) on montant (10), montant (10) rotate through pivot (12) and connect on mount (3), montant (10) with set up two torsional springs (13) between pivot (12), be located the top horizontal pole (11) tip protrusion static contact (1) is located the lower part horizontal pole (11) tip with static contact (1) contacts, static contact (1) with set up extension spring (14) between mount (3), extension spring (14) with montant (10) are perpendicular.
2. The contact assembly for the on-load tap changer according to claim 1, wherein the end of the cross rod (11) is provided with a roller (15), and the outer peripheral surface of the roller (15) is respectively contacted with the static contact (1) and the fixing rod (7).
3. The contact assembly for the on-load tap changer according to claim 1, characterized in that the elastic member (9) is a compression spring, and the elastic member (9) is statically connected to the limiting plate (8).
4. The contact assembly for the on-load tap changer according to claim 1, wherein a transverse plate (16) is arranged below the fixed contact (1), first protrusions (17) are arranged at bottoms of two sides of the fixed contact (1), a sliding groove (18) for limiting a moving track of the fixed contact (1) is arranged on the transverse plate (16), and the first protrusions (17) are located in the sliding groove (18).
5. The on-load tap changer contact assembly according to claim 1, wherein the torsion directions of the two torsion springs (13) are opposite, and the cross bar (11) is rotatably connected with the connecting rod (19).
6. The contact assembly for the on-load voltage regulating switch according to claim 1, wherein an outer tube (20) is arranged on the limiting plate (8), the elastic member (9) is arranged in the outer tube (20), the elastic member (9) is connected with an inner rod (25), the inner rod (25) is inserted in the outer tube (20), an opening is formed in the outer tube (20), the opening is closed by a closing door (21) which is opened outwards, the opening angle of the closing door (21) is smaller than 90 degrees, and a liquid leakage hole (22) is formed in the closing door (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110456271.8A CN113192775B (en) | 2021-04-26 | 2021-04-26 | Contact assembly for on-load voltage regulating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110456271.8A CN113192775B (en) | 2021-04-26 | 2021-04-26 | Contact assembly for on-load voltage regulating switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113192775A CN113192775A (en) | 2021-07-30 |
| CN113192775B true CN113192775B (en) | 2022-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110456271.8A Active CN113192775B (en) | 2021-04-26 | 2021-04-26 | Contact assembly for on-load voltage regulating switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113192775B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB887369A (en) * | 1958-05-02 | 1962-01-17 | Smit & Willem & Co Nv | Improvements in and relating to rotary switches for high voltages, more particularlytap changing switches for a regulating transformer |
| GB2000911A (en) * | 1977-07-09 | 1979-01-17 | Reinhausen Maschf Scheubeck | A tap changing switch |
| GB2045534A (en) * | 1979-03-15 | 1980-10-29 | Reinhausen Maschf Scheubeck | Improvements in or relating to a tap switch for a tapped transformer |
| WO1984003051A1 (en) * | 1983-02-07 | 1984-08-16 | Amiga Corp | Control unit for video games and the like |
| JPS59208710A (en) * | 1983-05-07 | 1984-11-27 | マシイネンフアブリーク・ラインハウゼン・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング | Contacor for load tap selector of on-load tap changing transformer |
| CN101651029A (en) * | 2009-07-30 | 2010-02-17 | 上海华明电力设备制造有限公司 | Vacuum vessel switching core used by on-load tap-changer |
| JP2010258266A (en) * | 2009-04-27 | 2010-11-11 | Mitsubishi Electric Corp | Tap switching device |
| WO2012097959A1 (en) * | 2011-01-20 | 2012-07-26 | Maschinenfabrik Reinhausen Gmbh | Tap changer |
| CN102693858A (en) * | 2011-03-25 | 2012-09-26 | 星电株式会社 | Wiring substrate and input apparatus with the wiring substrate |
| CN102693820A (en) * | 2012-06-06 | 2012-09-26 | 武汉泰普变压器开关有限公司 | Off-circuit tap-changer |
| CN103718265A (en) * | 2011-06-03 | 2014-04-09 | 库珀·克劳斯-海因兹有限责任公司 | Actuating device |
-
2021
- 2021-04-26 CN CN202110456271.8A patent/CN113192775B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB887369A (en) * | 1958-05-02 | 1962-01-17 | Smit & Willem & Co Nv | Improvements in and relating to rotary switches for high voltages, more particularlytap changing switches for a regulating transformer |
| GB2000911A (en) * | 1977-07-09 | 1979-01-17 | Reinhausen Maschf Scheubeck | A tap changing switch |
| GB2045534A (en) * | 1979-03-15 | 1980-10-29 | Reinhausen Maschf Scheubeck | Improvements in or relating to a tap switch for a tapped transformer |
| WO1984003051A1 (en) * | 1983-02-07 | 1984-08-16 | Amiga Corp | Control unit for video games and the like |
| JPS59208710A (en) * | 1983-05-07 | 1984-11-27 | マシイネンフアブリーク・ラインハウゼン・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング | Contacor for load tap selector of on-load tap changing transformer |
| JP2010258266A (en) * | 2009-04-27 | 2010-11-11 | Mitsubishi Electric Corp | Tap switching device |
| CN101651029A (en) * | 2009-07-30 | 2010-02-17 | 上海华明电力设备制造有限公司 | Vacuum vessel switching core used by on-load tap-changer |
| WO2012097959A1 (en) * | 2011-01-20 | 2012-07-26 | Maschinenfabrik Reinhausen Gmbh | Tap changer |
| CN102693858A (en) * | 2011-03-25 | 2012-09-26 | 星电株式会社 | Wiring substrate and input apparatus with the wiring substrate |
| CN103718265A (en) * | 2011-06-03 | 2014-04-09 | 库珀·克劳斯-海因兹有限责任公司 | Actuating device |
| CN102693820A (en) * | 2012-06-06 | 2012-09-26 | 武汉泰普变压器开关有限公司 | Off-circuit tap-changer |
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| Publication number | Publication date |
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| CN113192775A (en) | 2021-07-30 |
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Effective date of registration: 20210831 Address after: 450015 No. 40, Huaihe Road, Zhongyuan District, Zhengzhou City, Henan Province Applicant after: MAINTENANCE COMPANY OF STATE GRID HENAN ELECTRIC POWER Co. Applicant after: STATE GRID CORPORATION OF CHINA Applicant after: Chongqing University Address before: 450000 qianyun road and Huaxia Avenue fork West, Guancheng Hui District, Zhengzhou City, Henan Province Applicant before: MAINTENANCE COMPANY OF STATE GRID HENAN ELECTRIC POWER Co. Applicant before: STATE GRID CORPORATION OF CHINA |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No.40, Huaihe Road, Zhongyuan District, Zhengzhou City, Henan Province 450006 Applicant after: Super high voltage company of State Grid Henan Electric Power Co. Applicant after: STATE GRID CORPORATION OF CHINA Applicant after: Chongqing University Address before: 450015 No. 40, Huaihe Road, Zhongyuan District, Zhengzhou City, Henan Province Applicant before: MAINTENANCE COMPANY OF STATE GRID HENAN ELECTRIC POWER Co. Applicant before: STATE GRID CORPORATION OF CHINA Applicant before: Chongqing University |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |