CN215496346U - Polarity selector for on-load tap-changer - Google Patents
Polarity selector for on-load tap-changer Download PDFInfo
- Publication number
- CN215496346U CN215496346U CN202121255958.7U CN202121255958U CN215496346U CN 215496346 U CN215496346 U CN 215496346U CN 202121255958 U CN202121255958 U CN 202121255958U CN 215496346 U CN215496346 U CN 215496346U
- Authority
- CN
- China
- Prior art keywords
- contact
- fixed
- fixed contact
- length direction
- load tap
- 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.)
- Active
Links
Images
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The application discloses a polarity selector for an on-load tap-changer, which relates to the technical field of on-load tap-changers and comprises an insulating support frame fixed on the outer wall of an insulating cylinder of the on-load tap-changer, wherein a connecting contact is rotatably arranged on the insulating support frame; a first fixed contact and a second fixed contact are respectively fixed on the two sides of the moving contact on the insulating support frame; the moving contact is respectively communicated with the first fixed contact or the second fixed contact in a contact manner. The transformer has the effect of enlarging the voltage regulation range of the transformer under the condition of not increasing the tap joint of the transformer by converting the polarity of the voltage regulation coil.
Description
Technical Field
The application relates to the technical field of on-load tap-changers, in particular to a polarity selector 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, and comprises two functions of switching and selecting.
At present, most of on-load tap changers used in power transformers with the voltage below 35KV are not provided with polarity selectors, and the number of taps in the tap changer is the number of tap gears of the transformer.
In view of the above-mentioned related technologies, the inventor believes that the voltage regulating range of the transformer is limited due to the influence of the inherent position number of the tap changer, which is not favorable for the normal operation of the transformer.
SUMMERY OF THE UTILITY MODEL
In order to realize the purposes of expanding the voltage regulation range of a transformer and ensuring the normal use of the transformer under the condition of not increasing the tap joints of the transformer, the application provides a polarity selector for an on-load tap-changer.
The application provides a polarity selector for on-load tap-changer adopts following technical scheme:
a polarity selector for an on-load tap-changer comprises an insulating support frame fixed on the outer wall of an insulating cylinder of the on-load tap-changer, wherein a connecting contact is rotatably arranged on the insulating support frame, a driving component for driving the connecting contact to rotate is arranged on the outer wall of the insulating cylinder of the on-load tap-changer, a moving contact is fixed at one end of the connecting contact in the length direction, and the length direction of the moving contact is perpendicular to the axis direction of the connecting contact; a first static contact and a second static contact are respectively fixed on two sides of the insulating support frame in the length direction of the movable contact; the moving contact is respectively in contact communication with the first fixed contact or the second fixed contact;
when the polarity is switched, the driving component drives the connecting contact to rotate, and the connecting contact drives the moving contact to swing from the first fixed contact or the second fixed contact to the second fixed contact or the first fixed contact and to be communicated with the second fixed contact or the first fixed contact in a contact mode.
By adopting the technical scheme, when in actual use, the connecting contact is communicated with the output contact arranged on the outer wall of the insulating cylinder of the tap switch, and the moving contact is communicated with the first static contact or the second static contact; the first static contact or the second static contact is then communicated with an external circuit; after flowing out from an output contact installed on the outer wall of the insulating cylinder of the tap switch, the current flows through the connecting contact and the moving contact in sequence and then flows through the first static contact or the second static contact; then, the current flows into an external circuit; when the polarity is switched, the driving component drives the connecting contact to rotate around the center line of the length direction of the connecting contact, and the connecting contact drives the moving contact to swing from the first fixed contact or the second fixed contact to the second fixed contact or the first fixed contact while rotating, and is in contact communication with the second fixed contact or the first fixed contact, so that the polarity switching in the voltage regulating circuit is completed; the voltage regulating range of the transformer is effectively enlarged under the condition that the tap joints of the transformer are not increased.
Preferably, the driving assembly comprises two insulating pull rods arranged between the tap changer insulating cylinder and the insulating support frame, the two insulating pull rods are arranged in parallel at intervals, and the two insulating pull rods move in opposite directions along the length direction of the two insulating pull rods; a driving piece for driving the two insulating pull rods to move towards opposite directions is arranged on the tap changer insulating cylinder; the driving assembly further comprises a driven rocker arm arranged in the middle of the two insulating pull rods, and two sides of the driven rocker arm in the length direction are respectively hinged with the two insulating pull rods; one side of the connecting contact in the length direction, which deviates from the insulating support frame, is fixedly connected with the middle position of the driven rocker arm in the length direction.
By adopting the technical scheme, when polarity conversion is carried out, the driving piece drives the two insulating pull rods to move towards opposite directions along the length direction of the driving piece, and the two insulating pull rods simultaneously and respectively drive the two ends of the driven rocker arm in the length direction to move towards opposite directions along the length direction of the insulating pull rods, so that the driven rocker arm rotates around the connection point of the driven rocker arm and the connection contact; the driven rocker arm drives the connecting contact fixed on the driven rocker arm to rotate while rotating, and the connecting contact drives the moving contact to swing so that the moving contact swings from the first fixed contact or the second fixed contact to the second fixed contact or the first fixed contact and is communicated with the second fixed contact or the first fixed contact; the driving structure is simple, the processing and the manufacturing are convenient, and the enterprise manufacturing cost is saved.
Preferably, the driving part comprises an active rocker arm, the active rocker arm is respectively arranged on two sides of the insulating pull rod in the length direction, and two sides of any active rocker arm in the length direction are respectively in rotating connection with the corresponding sides of the two insulating pull rods in the length direction; a rotating shaft is rotatably arranged at the middle position of any driving rocker arm in the length direction, and the rotating axis direction of the rotating shaft is parallel to the length direction of the connecting contact; and a first bevel gear is fixed at one end of the rotating shaft, which axially deviates from the driving rocker arm, a second bevel gear is rotatably arranged on the tap changer insulating cylinder, and the second bevel gear is meshed with the first bevel gear and is in transmission connection with the first bevel gear.
Through adopting above-mentioned technical scheme, during the in-service use, the first bevel gear of second bevel gear drive on the tapping switch insulating cylinder rotates, and first bevel gear drives the pivot and rotates, and the pivot drives the swing of initiative rocking arm, and the swing of initiative rocking arm drives two insulating pull rods simultaneously and moves to opposite direction respectively along self length direction, and then accomplishes the drive operation, drives simple structure, and convenient preparation further saves the manufacturing cost of enterprise.
Preferably, the transmission mechanism between the second bevel gear and the first bevel gear is an intermittent gear transmission mechanism.
By adopting the technical scheme, when polarity conversion is carried out, the second bevel gear is meshed with the first bevel gear and drives the first bevel gear to rotate; when the circuit is stable, the second bevel gear is not meshed with the first bevel gear, and the first bevel gear does not rotate, so that the moving contact is always kept at the first fixed contact or the second fixed contact; when the second bevel gear is meshed with the first bevel gear again and drives the first bevel gear to rotate, just new polarity switching is needed; the moving contact swings from the first fixed contact or the second fixed contact to the second fixed contact or the first fixed contact, so that the polarity conversion process is completed; adopt intermittent type gear drive mechanism, help promoting the degree of automation of this polarity selector, and drive simple structure effectively reduces the manufacturing cost of enterprise.
Preferably, the moving contact is a clip-type contact, and the first fixed contact and the second fixed contact are both arranged in a sheet shape; when the polarity is switched, the first static contact and the second static contact are respectively embedded into the two clamping sheets of the moving contact and are respectively connected with the moving contact in a sliding manner.
By adopting the technical scheme, the movable contact and the corresponding fixed contact are connected by means of the clamping matching of the clamping piece type movable contact and the piece type fixed contact, and the stable communication of the movable contact and the corresponding first fixed contact and second fixed contact is favorably ensured.
Preferably, the first fixed contact and the second fixed contact are arranged in an arc shape on the side close to the movable contact.
By adopting the technical scheme, the moving contact swings around the connection point of the moving contact and the connecting contact, the track scribed by the moving contact is arc-shaped, and the first fixed contact and the second fixed contact are arranged on the sides close to the moving contact to be arc-shaped, so that clamping and clamping cooperation between the moving contact and the fixed contacts without clamping stagnation is facilitated.
Preferably, the first fixed contact and the second fixed contact are respectively arranged on two side surfaces of the insulating support frame, which are deviated from each other.
By adopting the technical scheme, when the first static contact and the second static contact are respectively connected with the external circuit, the first static contact and the second static contact are respectively arranged on the two side surfaces of the insulating support frame, which deviate from each other, so that the occurrence of the winding condition of the wires is reduced, and the circuit is conveniently checked and maintained by workers.
Preferably, one side of the connecting contact, which is far away from the movable contact, is fixedly communicated with a fixed contact.
By adopting the technical scheme, when the circuit does not need to carry out polarity conversion, the external circuit can be directly connected to the fixed contact, so that the connection requirements of different circuits are met, and the application range of the polarity selector is favorably expanded.
In summary, the present application includes at least one of the following beneficial technical effects:
the moving contact arranged in a rotating way and the static contacts fixed on the insulating support frame and positioned on two sides of the moving contact are utilized; when the polarity is switched, the moving contact swings from the first fixed contact or the second fixed contact to the second fixed contact or the first fixed contact and is in contact communication with the second fixed contact or the first fixed contact, so that the polarity switching in the voltage regulating circuit is completed, and the requirement of expanding the voltage regulating range of the transformer is met while the tap joints of the transformer are not increased;
the first bevel gear and the rotating shaft are driven to rotate by the second bevel gear, the rotating shaft simultaneously drives the two insulating pull rods to move, the two insulating pull rods further drive the driven rocker arm to rotate, the driven rocker arm drives the connecting contact fixed on the driven rocker arm to rotate, the connecting contact further drives the moving contact to swing, and the moving contact swings from the first fixed contact or the second fixed contact to the second fixed contact or the first fixed contact, so that the polarity is changed;
the connection between the moving contact and the fixed contact is realized by the clamping fit of the clamping piece type moving contact and the piece type fixed contact; meanwhile, the side, close to the moving contact, of the first static contact and the side, close to the moving contact, of the second static contact are arranged to be arc-shaped, so that the convenience and firmness of clamping and matching of the moving contact and the first static contact and the second static contact are effectively improved, and the stable operation of the polarity selection circuit is effectively guaranteed.
Drawings
Fig. 1 is a schematic axial view of an overall structure of a polarity selector for on-load tap changers according to an embodiment of the present invention.
Fig. 2 is a partially enlarged view mainly showing mounting positions of a first fixed contact and a second fixed contact in the embodiment of the present application.
Fig. 3 is a partially enlarged view of the entire structure of the drive assembly according to the embodiment of the present application.
FIG. 4 is a partially enlarged view of the installation positions of the first bevel gear and the second bevel gear in the embodiment of the present application.
Reference numerals: 1. an insulating support frame; 2. a connection contact; 3. a drive assembly; 31. an insulating pull rod; 32. an active rocker arm; 33. a rotating shaft; 34. a first bevel gear; 35. a second bevel gear; 36. a driven rocker arm; 4. a moving contact; 5. a first fixed contact; 6. a second fixed contact; 7. and fixing the contact.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses a polarity selector for an on-load tap-changer.
Referring to fig. 1, a polarity selector for an on-load tap-changer comprises an insulating support frame 1 fixed on the outer wall of an insulating cylinder of the on-load tap-changer, wherein a connecting contact 2 is rotatably arranged on the insulating support frame 1, one end of the connecting contact 2 in the length direction is communicated with an output contact arranged on the outer wall of the insulating cylinder of the on-load tap-changer, the other end of the connecting contact 2 in the length direction penetrates through the insulating support frame 1 and is in rotating fit with the insulating support frame 1, and the rotating axis direction of the connecting contact 2 is parallel to the length direction of the connecting contact; the outer wall of the on-load tap-changer insulating cylinder is also provided with a driving component 3 for driving the connecting contact 2 to rotate; one end of the connecting contact 2 in the length direction is fixed with a moving contact 4, and the length direction of the moving contact 4 is vertical to the direction of the rotating axis of the connecting contact 2; a first static contact 5 and a second static contact 6 are respectively fixed on two sides of the insulating support frame 1 in the length direction of the movable contact 4, and the movable contact 4 is respectively communicated with the first static contact 5 and the second static contact 6 in a contact manner.
Specifically, referring to fig. 2, in this embodiment, the movable contact 4 is a clip-type movable contact 4, the first fixed contact 5, the second fixed contact 6 and the movable contact 4 are located in the same plane in the length direction, the first fixed contact 5 and the second fixed contact 6 are both arranged in a shape of a sheet, and one ends of the first fixed contact 5 and the second fixed contact 6, which are close to the movable contact 4, are both arranged in a shape of an arc.
When the connector is actually used, the driving component 3 firstly drives the connecting contact 2 to rotate around the central line of the connecting contact along the length direction; then, the connecting contact 2 drives the moving contact 4 to rotate around a connection point of the connecting contact 2 and the moving contact 4, so that one end of the moving contact 4, which is far away from the connecting contact 2, swings from the first fixed contact 5 or the second fixed contact 6 to the second fixed contact 6 or the first fixed contact 5, and the second fixed contact 6 or the first fixed contact 5 is embedded between two clamping pieces of the moving contact 4 and is in contact communication with the second fixed contact 6 or the first fixed contact 5.
Referring to fig. 3 and 4, the driving assembly 3 includes two insulating pull rods 31, the two insulating pull rods 31 are disposed between the on-load tap-changer insulating cylinder and the insulating support frame 1, and the two insulating pull rods 31 are disposed in parallel at intervals; two ends of each of the two insulating pull rods 31 in the length direction are respectively provided with an active rocker arm 32, and two sides of any one active rocker arm 32 in the length direction are respectively in rotating connection with the corresponding sides of the two insulating pull rods 31 in the length direction; a rotating shaft 33 is rotatably arranged at the middle position of any one of the driving rocker arms 32 in the length direction, the axial direction of the rotating shaft 33 is parallel to the length direction of the connecting contact 2, and the rotating axial direction of the rotating shaft 33 is parallel to the rotating axial direction of the connecting contact 2; a first bevel gear 34 is fixed at one end of the rotating shaft 33, which axially deviates from the driving rocker 32, and the first bevel gear 34 is arranged on the on-load tap-changer insulating cylinder; in addition, a second bevel gear 35 is rotatably arranged on the on-load tap-changer insulating cylinder corresponding to the first bevel gear 34, and the second bevel gear 35 is meshed with the first bevel gear 34 and is in transmission connection with the first bevel gear 34; and the transmission between the first bevel gear 34 and the second bevel gear 35 is an intermittent gear transmission.
Meanwhile, the driving assembly 3 further comprises a driven rocker arm 36 arranged in the middle of the two insulating rods, and two ends of the driven rocker arm 36 in the length direction are respectively in rotary connection with the middle of the two insulating support rods in the length direction; and, one side that connects contact 2 length direction and deviates from insulating support frame 1 is connected with the middle part position fixed connection of driven rocker 36 length direction.
When the polarity is switched, the first bevel gear 34 is meshed with the second bevel gear 35 and is in transmission connection with the second bevel gear 35, the second bevel gear 35 drives the first bevel gear 34 to rotate, and the first bevel gear 34 rotates and simultaneously drives the rotating shaft 33 to rotate; then, the rotating shaft 33 drives the driving rocker 32 to swing around the connecting point of the driving rocker 32 and the rotating shaft 33, so that the driving rocker 32 drives the two insulating pull rods 31 to respectively move in opposite directions along the length direction of the driving rocker 32; when the two insulating pull rods 31 move, the driven rocker arm 36 is driven to rotate, and the driven rocker arm 36 drives the connecting contact 2 fixed on the driven rocker arm to rotate; meanwhile, the connecting contact 2 drives the moving contact 4 to rotate around the connecting point of the moving contact 4 and the connecting contact 2, so that one end of the moving contact 4, which is far away from the connecting contact 2, swings from the first fixed contact 5 or the second fixed contact 6 to the second fixed contact 6 or the first fixed contact 5 and is communicated with the second fixed contact 6 or the first fixed contact 5 in a contact manner, and the driving process is further completed.
Subsequently, when the second bevel gear 35 is separated from the first bevel gear 34, the first bevel gear 34 stops rotating, so that the movable contact 4 is always kept at the second stationary contact 6 or the first stationary contact 5 and is always communicated with the second stationary contact 6 or the first stationary contact 5 until the second bevel gear 35 is meshed with the first bevel gear 34 again.
Referring to fig. 2, after the first fixed contact 5 and the second fixed contact 6 are respectively connected to an external circuit, in order to reduce wire winding and facilitate the maintenance of the circuit by the staff, the first fixed contact 5 and the second fixed contact 6 are respectively disposed on two side surfaces of the insulating support frame 1 that are away from each other. Meanwhile, the insulating support frame 1 is further provided with a fixed contact 7, one end of the fixed contact 7 is fixed on the insulating support frame 1, and the other end of the fixed contact 7 is fixedly communicated with one end of the connecting contact 2, which is away from the moving contact 4 in the length direction. When the circuit does not need to carry out polarity conversion, the external circuit can be directly communicated with the fixed contact 7, and the circuit current flows into the external circuit from the output contact of the on-load tap-changer through the fixed contact 7, so that the connection requirements of different circuits are met, and the applicability of the polarity selector is expanded.
The implementation principle of the polarity selector for the on-load tap-changer in the embodiment of the application is as follows: when the insulating pull rod is actually used, the second bevel gear 35 firstly drives the first bevel gear 34 to rotate, the first bevel gear 34 drives the rotating shaft 33 and the driving rocker 32 to rotate, and the driving rocker 32 drives the two insulating pull rods 31 to respectively move in opposite directions along the length direction of the insulating pull rod; the two insulating pull rods 31 move to drive the driven rocker arm 36 to swing, the driven rocker arm 36 drives the connecting contact 2 and the moving contact 4 to rotate, so that one end, away from the connecting contact 2, of the moving contact 4 swings to the second fixed contact 6 or the first fixed contact 5 from the first fixed contact 5 or the second fixed contact 6, and the second fixed contact 6 or the first fixed contact 5 is embedded between the two clamping pieces of the moving contact 4 and is in contact communication with the second fixed contact 6 or the first fixed contact 5, so that the polarity of a circuit is changed. By adopting the mode, the purpose of expanding the voltage regulation range of the transformer is achieved by converting the polarity of the voltage regulation coil when the tap joint of the transformer is not increased.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A polarity selector for an on-load tap-changer, characterized by: the on-load tap-changer insulation barrel comprises an insulation support frame (1) fixed on the outer wall of an on-load tap-changer insulation barrel, wherein a connecting contact (2) is rotatably arranged on the insulation support frame (1), a driving component (3) for driving the connecting contact (2) to rotate is arranged on the outer wall of the on-load tap-changer insulation barrel, a moving contact (4) is fixed at one end of the connecting contact (2) in the length direction, and the length direction of the moving contact (4) is perpendicular to the axis direction of the connecting contact (2); a first fixed contact (5) and a second fixed contact (6) are respectively fixed on two sides of the insulating support frame (1) in the length direction of the movable contact (4); the moving contact (4) is respectively communicated with the first fixed contact (5) or the second fixed contact (6) in a contact way;
when the polarity is switched, the driving component (3) drives the connecting contact (2) to rotate, and the connecting contact (2) drives the moving contact (4) to swing from the first fixed contact (5) or the second fixed contact (6) to the second fixed contact (6) or the first fixed contact (5) and to be communicated with the second fixed contact (6) or the first fixed contact (5) in a contact manner.
2. The polarity selector for an on-load tap changer of claim 1, wherein: the driving assembly (3) comprises two insulating pull rods (31) arranged between a tap changer insulating cylinder and an insulating support frame (1), the two insulating pull rods (31) move in opposite directions along the length direction of the insulating pull rods, and a driving piece used for driving the two insulating pull rods (31) to move is arranged on the tap changer insulating cylinder; the driving assembly (3) further comprises driven rocker arms (36) arranged at the middle positions of the two insulating pull rods (31), and one side of each connecting contact (2) in the length direction, which deviates from the insulating support frame (1), is fixedly connected with the middle positions of the driven rocker arms (36) in the length direction.
3. The polarity selector for an on-load tap changer of claim 2, wherein: the driving piece comprises driving rocker arms (32), one driving rocker arm (32) is arranged on each of two sides of the insulating pull rod (31) in the length direction, and two sides of any one driving rocker arm (32) in the length direction are respectively in rotating connection with corresponding sides of the two insulating pull rods (31) in the length direction; a rotating shaft (33) is rotatably arranged at the middle position of any driving rocker arm (32) in the length direction, and the rotating axis direction of the rotating shaft (33) is parallel to the length direction of the connecting contact (2); a first bevel gear (34) is fixed at one end of the rotating shaft (33) which axially deviates from the driving rocker arm (32), a second bevel gear (35) is rotatably arranged on the tap changer insulating cylinder, and the second bevel gear (35) is meshed with the first bevel gear (34) and is in transmission connection.
4. A polarity selector for an on-load tap changer according to claim 3, characterized in that: the transmission mechanism between the second bevel gear (35) and the first bevel gear (34) is an intermittent gear transmission mechanism.
5. The polarity selector for an on-load tap changer of claim 1, wherein: the moving contact (4) is a clip-type contact, and the first fixed contact (5) and the second fixed contact (6) are both arranged in a sheet shape; and when the polarity is switched, the first fixed contact (5) and the second fixed contact (6) are respectively embedded into the clamping sheets of the moving contact (4) and are respectively connected with the moving contact (4) in a sliding manner.
6. The polarity selector for an on-load tap changer of claim 5, wherein: the first static contact (5) and the second static contact (6) are arranged in an arc shape at one side close to the moving contact (4).
7. The polarity selector for an on-load tap changer of claim 6, wherein: the first static contact (5) and the second static contact (6) are respectively arranged on two side faces, which are deviated from each other, of the insulating support frame (1).
8. The polarity selector for an on-load tap changer of claim 1, wherein: one side of the connecting contact (2) departing from the moving contact (4) is fixedly communicated with a fixed contact (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121255958.7U CN215496346U (en) | 2021-06-04 | 2021-06-04 | Polarity selector for on-load tap-changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121255958.7U CN215496346U (en) | 2021-06-04 | 2021-06-04 | Polarity selector for on-load tap-changer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215496346U true CN215496346U (en) | 2022-01-11 |
Family
ID=79783260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121255958.7U Active CN215496346U (en) | 2021-06-04 | 2021-06-04 | Polarity selector for on-load tap-changer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215496346U (en) |
-
2021
- 2021-06-04 CN CN202121255958.7U patent/CN215496346U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101430542B1 (en) | Switching arrangement | |
| CN102623202B (en) | A kind of composite vacuum on-load tap-changer changeover module | |
| BR112014022196B1 (en) | DISTRIBUTION TRANSFORMER FOR LOCAL NETWORK VOLTAGE ADJUSTMENT | |
| CN104541352A (en) | On-load tap changer | |
| CN106653426B (en) | A kind of special on-load voltage regulating switch of distribution transformer | |
| CN207124127U (en) | A kind of special on-load voltage regulating switch of distribution transformer | |
| CN215496346U (en) | Polarity selector for on-load tap-changer | |
| CN104205273A (en) | On-load tap changer having at least two vacuum interrupters, and drive for a load changeover switch having at least two vacuum interrupters | |
| CN218038826U (en) | Tap switch controlled by pull wire | |
| US4013847A (en) | No-load tap changer switch with rack and pinion gear operating mechanism | |
| CN113745014B (en) | On-load tap-changer's reciprocating type switching mechanism | |
| CN203596285U (en) | Isolation switch in vacuum on-load tap-changer | |
| CN114026665A (en) | Multi-phase selector-pre-selector arrangement for on-load tap changer | |
| CN201765927U (en) | Compact oil-immersion type vacuum on-load tap-changer | |
| CN208796868U (en) | Realize the dual-power transfer switch of neutral pole overlapping conversion | |
| CN206516506U (en) | A kind of special on-load voltage regulating switch of distribution transformer | |
| JPH0652688B2 (en) | Load tap changer | |
| CN109427494A (en) | A kind of dedicated on-load voltage regulating switch of distribution transformer | |
| CN106710906B (en) | A kind of special on-load voltage regulating switch of distribution transformer | |
| JP2004039958A (en) | Vacuum valve on-load tap changer | |
| CN201348970Y (en) | Revolving switch device and high voltage switch with revolving switch device | |
| CN216161637U (en) | Dual-power isolating switch | |
| CN101752070B (en) | Vacuum tube switching core used for M type on-load tap-changer | |
| CN215183801U (en) | Transmission device for high-voltage circuit breaker | |
| JP2017526173A (en) | Motor drive device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |