CN215896191U - Miniaturized on-load tap changer and on-load tap changing distribution transformer - Google Patents
Miniaturized on-load tap changer and on-load tap changing distribution transformer Download PDFInfo
- Publication number
- CN215896191U CN215896191U CN202120392772.XU CN202120392772U CN215896191U CN 215896191 U CN215896191 U CN 215896191U CN 202120392772 U CN202120392772 U CN 202120392772U CN 215896191 U CN215896191 U CN 215896191U
- Authority
- CN
- China
- Prior art keywords
- driving
- load tap
- miniaturized
- tap changer
- drives
- 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
Abstract
The utility model discloses a miniaturized on-load tap changer and an on-load tap changing distribution transformer, which comprise a driving mechanism, a metal fixing plate, a selection switch assembly, a change-over switch assembly, a transition element, an insulation mounting main board and an insulation mounting support, wherein the three-phase selection switch assembly, the change-over switch assembly and the transition element are arranged on the insulation mounting main board in a trisection mode.
Description
Technical Field
The device relates to the technical field of electric power products, in particular to a miniaturized on-load tap changer and an on-load tap changing distribution transformer.
Background
The distribution transformer is the last transformer of a power supply network, is applied to various fields of the national civilization, is distributed in various corners of cities and countryside, and is huge in quantity. The existing distribution transformer is in a non-excitation voltage regulation mode, a power supply is cut off firstly during voltage regulation, then a non-excitation voltage regulation switch is manually adjusted, and power transmission is recovered after adjustment is finished. Because the voltage can be regulated only by power failure and timely voltage regulation cannot be realized, the distribution transformer in an actual power supply network is equal to a distribution transformer without voltage regulation measures, the power supply voltage has low qualification rate and poor stability, and the loss of the distribution transformer and the loss of electric equipment are increased due to abnormal operation of the electric equipment. With the continuous promotion and development of social economy and power grids, the requirement on the voltage quality is higher and higher, so that the requirement on the reliability of the on-load voltage regulation distribution transformer is higher and higher, and the requirements on the reliability, the miniaturization, the voltage regulation gear position number and the like of the on-load voltage regulation switch are also increased to meet the requirements of different types of distribution transformers.
In recent years, there are cases where an on-load tap changer of a main transformer is applied to a distribution transformer to realize on-load tap changing, but the on-load tap changer of the main transformer is large in size, needs to be maintained regularly, cannot meet the reliability requirement of the distribution transformer, and is not suitable for the distribution transformer with large quantity. The on-load tap changer adopting a spring energy storage mode and a permanent magnet and electromagnetic driving mode is also applied to a distribution transformer in the market, although vacuum arc extinguishing is also adopted, the driving mode of the type is adopted, the impact force is large during driving transmission, the service life of relevant parts of the on-load tap changer is influenced, the service life cycle of the on-load tap changer cannot meet the design service life cycle of the distribution transformer, and the on-load tap changer is not suitable for being used in a large number of distribution transformers. Recently, linear on-load tap changers have also appeared, which are small in size, but their use in a three-dimensional wound core distribution transformer can greatly increase the manufacturing cost of the three-dimensional wound core distribution transformer.
Disclosure of Invention
The utility model aims to provide a miniaturized on-load tap changer and an on-load tap changing distribution transformer, which solve the problem that the on-load tap changing distribution transformer in the prior art needs regular maintenance due to on-load tap changing, realize the characteristics of long service life and maintenance-free of the on-load tap changer, and ensure that the service life cycle of the on-load tap changer is equal to the service life of a distribution transformer body. Meanwhile, the problems that an on-load tap changer in the prior art is large in size and inconvenient to install are solved, the on-load tap changer is miniaturized, a disc structure is adopted, the on-load tap changer is suitable for distribution transformers of any structural types, the structural mode of the tap changer is most suitable for a three-dimensional wound core transformer, the on-load tap changer is installed in the distribution transformers, and the on-load tap changer is installed almost without changing the size and the shape of a conventional distribution transformer.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a miniaturized on-load voltage regulation switch is characterized by comprising a driving mechanism, a metal fixing plate, a selection switch assembly, a change-over switch assembly, a transition element, an insulation mounting main board and an insulation mounting support;
the driving mechanism comprises a motor, a gearbox, a driving shaft wheel, a transmission gear, a grooved wheel mechanism and a driving turntable;
each phase of the selective switch component comprises two moving contacts and a plurality of fixed contacts;
each phase of the change-over switch assembly comprises two vacuum arc-extinguishing chambers and two sets of driving arms;
the motor is connected with the gearbox and is arranged on the gearbox;
the gearbox is mounted on the metal fixing plate;
the driving shaft wheel is connected with the gearbox;
the driving shaft wheel is meshed with the transmission gear;
the moving contact is arranged on the driving turntable;
the plurality of fixed contacts, the change-over switch assembly and the transition element are all arranged on the insulation mounting main board;
the insulating mounting main board is connected with the metal fixing plate through three insulating mounting brackets;
the driving turntable is positioned on the lower side of the pressure bearing on the insulating mounting bracket;
the motor drives the transmission gear to rotate through the gearbox and the driving shaft, the transmission gear drives the geneva mechanism to act, the geneva mechanism drives the driving turntable to rotate, the driving turntable has a time sequence to drive the moving contact and the driving arm to act, the moving contact selects the corresponding fixed contact in the fixed contact assembly, and the driving arm drives the vacuum arc extinguish chamber to act to complete the conversion of voltage regulating gears.
According to a preferred embodiment of the present invention, the geneva mechanism includes a shift lever and a geneva wheel, the shift lever is fixedly connected to the transmission gear, one side of the geneva wheel is provided with a gear which is integrated with the geneva wheel, the transmission gear drives the shift lever thereon to rotate, the shift lever drives the geneva wheel to rotate, the geneva wheel rotates to drive the gear to rotate, and the gear is engaged with the teeth on the driving turntable to drive the driving turntable to rotate.
According to a preferred embodiment of the present invention, a cam is disposed on the driving turntable, and the cam drives the driving arm to move, so as to drive the vacuum interrupter to be turned on and off.
According to a preferred embodiment of the present invention, a through square hole is formed in the middle of the protruding portion of the insulating mounting bracket, a pressure bearing is disposed in the square hole, the driving turntable is located below the pressure bearing, and the pressure bearing exerts a certain pressure on the driving turntable.
According to a preferred embodiment of the present invention, the driving arm includes an arm rod a, an arm rod B, and a connecting shaft, the arm rod a is located on the upper side of the insulation mounting main board, one end of the arm rod a is connected to the connecting shaft, and the other end of the arm rod a is in contact with the driving turntable; the connecting shaft is arranged on the insulating mounting main board in a penetrating manner; the arm rod B is positioned on the lower side of the insulating mounting main board, one end of the arm rod B is connected with the connecting shaft, and the other end of the arm rod B is connected with a moving contact of the vacuum arc-extinguishing chamber; the driving turntable drives the arm rod A to act, the arm rod A drives the arm rod B to act through the connecting shaft, and the arm rod B drives the vacuum arc extinguish chamber to act.
According to a preferred embodiment of the present invention, the insulation mounting main board is provided with protrusions, the protrusions are disposed between the static contacts, and the protrusions are higher than the planes of the static contacts, so as to prevent the moving contact from short-circuiting two adjacent static contacts in the moving process.
According to a preferred embodiment of the present invention, the plurality of fixed contacts are connected to a tap of a voltage regulating winding of a high-voltage coil of a transformer, two vacuum arc-extinguishing chambers of each phase are electrically connected to each corresponding movable contact, and the transition element is electrically connected to one vacuum arc-extinguishing chamber of each phase.
According to a preferred embodiment of the utility model, the transmission is provided with a connector for communication.
According to a preferred embodiment of the present invention, the selector switch block, the diverter switch block, and the transition element are mounted on the main board in a manner of trisecting the main board.
An on-load voltage regulation distribution transformer adopts any one of the structures of the on-load voltage regulation distribution transformer of the miniaturized on-load voltage regulation switch.
Compared with the prior art, the utility model has the beneficial effects that the utility model discloses a miniaturized on-load tap changer and an on-load tap changing distribution transformer, the on-load tap changer is suitable for distribution transformers with any structures, in particular to a three-dimensional wound core transformer, the shape and the volume of the conventional distribution transformer are hardly changed when the on-load tap changer is installed in the distribution transformer, and the production cost increased by the large volume of the switch is greatly reduced; the fault-free maintenance-free continuous voltage regulation action is realized for more than 60 ten thousand times, the maintenance can be free in the service life cycle of the distribution transformer, and the reliability of the on-load voltage regulation of the distribution transformer is improved; frequent voltage adjustment under the condition of load is realized, the power supply voltage is stabilized, and the loss is reduced.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a miniaturized on-load tap changer of the present invention;
fig. 2 is a partial mechanism schematic diagram of a miniaturized on-load tap changer drive mechanism of the present invention;
FIG. 3 is a schematic diagram of a miniaturized on-load tap changer with a drive mechanism removed;
FIG. 4 is another schematic view of the miniaturized on-load tap changer with the drive mechanism removed;
fig. 5 is a schematic diagram of the voltage-regulating gear conversion principle of the miniaturized on-load tap changer.
Detailed Description
The utility model is further described below with reference to the accompanying drawings. The embodiments described below are merely selected embodiments of the present invention (only the miniaturized on-load tap changer with the tap position of 5 th gear is described) for more clearly explaining the technical solution of the present invention, but not all embodiments, and the protection scope of the present invention is not limited thereby. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of protection of the present invention.
Fig. 1 to 4 are schematic structural diagrams of a miniaturized on-load tap changer preferred by the present invention, and referring to fig. 1 to 4, a miniaturized on-load tap changer for a three-phase on-load tap changer includes a driving mechanism 1, a metal fixing plate 2, a selector switch assembly 3, a diverter switch assembly 4, a transition element 5, an insulation mounting main board 6, an insulation mounting bracket 7 (three insulation mounting brackets 7.1, 7.2, 7.3), and the selector switch assembly 3, the diverter switch assembly 4, the transition element 5, and the insulation mounting bracket 7 of three phases are distributed on the insulation mounting main board 6 in a trisection manner.
The driving mechanism 1 comprises a motor 1.1, a gearbox 1.2, a driving shaft wheel 1.3, a transmission gear 1.4, a sheave mechanism 1.5 and a driving turntable 1.6, and a connector 1.2.1 for communication information transmission is arranged on the gearbox 1.2.
Each phase selection switch component 3 comprises two moving contacts 3.1 and 3.2 and a plurality of static contacts 3.3, wherein 5 static contacts 3.3.1, 3.3.2, 3.3.3, 3.3.4 and 3.3.5 are shown in the figure; each phase change switch assembly 4 comprises two vacuum arc-extinguishing chambers 4.1, 4.2 and two sets of driving arms 4.3, 4.4.
The motor 1.1 is connected with the gearbox 1.2, and the motor 1.1 is arranged on the gearbox 1.2; the gearbox 1.2 is arranged on the metal fixing plate 2; the driving shaft wheel 1.3 is connected with the gearbox 1.2; the driving shaft wheel 1.3 is meshed with the transmission gear 1.4; the geneva gear 1.5 comprises a driving lever 1.5.1 and a geneva gear 1.5.2, and the driving lever 1.5.1 is fixedly connected with a transmission gear 1.4; the moving contacts 3.1 and 3.2 are arranged on the driving turntable 1.6; the static contact 3.3, the change-over switch component 4 and the transition element 5 are all arranged on the insulation mounting main board 6; the insulating installation main board 6 is provided with a plurality of bulges 6.1, the bulges 6.1 are all arranged between the static contacts 3.3, and the bulges 6.1 are all higher than the plane of the static contacts 3.3, so that the moving contacts 3.1 and 3.2 are prevented from short-circuiting two adjacent static contacts 3.3 in the moving process; the insulation mounting main board 6 is connected with the metal fixing plate 2 through three insulation mounting brackets 7.1, 7.2 and 7.3;
a gear is arranged on one side of the grooved pulley 1.5.2, the gear is meshed with teeth on the driving turntable 1.6, and the grooved pulley 1.5.2 rotates to drive the driving turntable 1.6 to rotate; the driving turntable 1.6 is provided with a plurality of cams 1.6.1; pressure bearings 7.1.1, 7.2.1 and 7.3.1 are arranged on the insulating mounting brackets 7.1, 7.2.1 and 7.3.3, and the pressure bearings 7.1.1, 7.2.1 and 7.3.1 are pressed on the driving turntable 1.6, so that the moving contacts 3.1 and 3.2 on the driving turntable 1.6 and the static contact 3.3 on the insulating mounting main board 6 can be well electrically connected.
The driving arms 4.3 and 4.4 comprise arm rods A4.3.1 and 4.4.1, arm rods B4.3.2 and 4.4.2 and connecting shafts 4.3 and 4.4.3, the arm rods A4.3.1 and 4.4.1 are positioned at the upper side of the insulation mounting main board, one ends of the arm rods AA 4.3.1 and 4.4.1 are connected with the connecting shafts 4.3 and 4.4.3, and the other ends of the arm rods AA 4.3 and 4.4.1 are contacted with the driving turntable 1.6; the connecting shafts 4.3.3 and 4.4.3 are arranged on the insulating mounting main board 6 in a penetrating way; the arm rods B4.3.2 and 4.4.2 are positioned at the lower side of the insulation mounting main board 6, one ends of the arm rods B4.3.2 and 4.4.2 are connected with the connecting shafts 4.3.3 and 4.4.3, and the other ends are connected with moving contacts of the vacuum arc-extinguishing chambers 4.1 and 4.2;
the motor 1.1 drives the transmission gear 1.4 to rotate through the gearbox 1.2 and the driving shaft wheel 1.3, the transmission gear 1.4 drives the deflector rod 1.5.1 thereon to rotate, the deflector rod 1.5.1 drives the sheave 1.5.2 to rotate, the sheave 1.5.2 drives the driving turntable 1.6 to rotate, the driving turntable 1.6 has time sequence driving moving contacts 3.1, 3.2 and driving arms 4.3 and 4.4 to act, the moving contacts 3.1 and 3.2 select one static contact 3.3 in the corresponding static contact assembly to be connected, the driving turntable 1.6 is provided with a plurality of cams 1.6.1, the cams 1.6.1 drive the arm rods A4.3.1 and 4.4.1 to act, the arm rods A4.3.1 and 4.4.1 drive the arm rods B4.3.2 and 4.4.2 to act through the arm rods B4.3.2, the vacuum arc extinguish chamber 4.2 and the connecting shaft 4.2 to complete the pressure regulation.
Referring to fig. 5, the miniaturized on-load tap changer of the present invention performs 7 steps of voltage-regulating selection switching process, wherein N, N +1 represents two adjacent coil taps of the voltage-regulating winding, A, B represents two moving contacts 3.1, 3.2 in the selector switch assembly 3, R represents a transition element 5, and D1, D2 represent two vacuum interrupters 4.1, 4.2 in the selector switch assembly 4; timing of switching from N +1 tap to N tap of the regulating winding:
step 1: the moving contacts A, B are all connected with the N +1 tap, and the vacuum arc-extinguishing chambers D1 and D2 are all connected. The current flows through the N +1 tap through the moving contact A and the vacuum arc-extinguishing chamber D2;
step 2: the vacuum arc extinguish chamber D2 is disconnected, the moving contact A is disconnected with the N +1 tap, the moving contact B is still connected with the N +1 tap, and current flows through the moving contact B, the vacuum arc extinguish chamber D1 and the transition element R from the N +1 tap;
and step 3: the moving contact B is still communicated with the N +1 tap, the moving contact A is switched to the N tap from the N +1 tap without current, and the current flows through the moving contact B, the arc extinguishing chamber D1 and the transition element R from the N +1 tap;
and 4, step 4: the moving contact B is still communicated with the N +1 tap, the vacuum arc extinguish chamber D2 is closed, the moving contact A is communicated with the N tap, current flows through the moving contact B, the vacuum arc extinguish chamber D1 and the transition element R from the N tap, the current flows through the moving contact A and the vacuum arc extinguish chamber D2 from the N tap, and at the moment, transient circulation current is generated between the N +1 tap and the N tap;
and 5: the vacuum arc extinguish chamber D1 is disconnected, the moving contact B is disconnected with the tap (N + 1), the moving contact A is still connected with the tap (N), and current flows through the tap (N) through the moving contact A and the vacuum arc extinguish chamber D2;
step 6: the moving contact A is still communicated with the N tap, the moving contact B is switched to the N tap from the N +1 tap without current, and the current flows through the N tap through the moving contact A and the vacuum arc-extinguishing chamber D2;
and 7: the moving contact A is still communicated with the N tap, the vacuum arc extinguish chamber D1 is communicated, the moving contact B is communicated with the N tap, and current flows through the N tap through the moving contact A and the vacuum arc extinguish chamber D2;
the voltage regulation selection switching process of the on-load voltage regulation switch is explained, in the whole selection switching process, the electric arc is only generated in the vacuum arc extinguishing chamber, the selection switch assemblies move or select corresponding contacts in a current-free state, transformer oil cannot be polluted, oil filtering maintenance or filter element replacement is not required to be carried out regularly, the operation and maintenance cost is greatly saved, and the selection switching process is well known to technical personnel in the technical field and is not explained any more.
When the miniaturized on-load tap changer is designed, the miniaturized on-load tap changer is developed from the aspects of miniaturization, maintenance-free property and equal service life to the design service life of a transformer. The driving mechanism 1 adopts the motor 1.1 for driving, and adopts a flexible driving strategy, thereby greatly reducing the impact force on related parts (a change-over switch assembly and a selection switch assembly) in the re-driving transmission process of the miniaturized on-load tap changer and improving the actual service life and reliability of each part of the switch; a motor protective shell is arranged outside the motor 1.1, the motor protective shell belongs to a full-protection design structure, and a full-protection communication connector is arranged on the gearbox, so that the design position has good waterproof and dustproof effects; two vacuum arc-extinguishing chambers 4.1 and 4.2 are arranged in the change-over switch assembly 4, when the voltage-regulating gear is switched, the two vacuum arc-extinguishing chambers 4.1 and 4.2 only act once, and compared with the other vacuum arc-extinguishing chambers which are only provided with one vacuum arc-extinguishing chamber and act twice during gear switching each time, the utility model needs complex mechanical mechanism matching, if the same type of vacuum arc-extinguishing chamber is selected, the service life of the utility model is prolonged by one time compared with the other vacuum arc-extinguishing chambers, and the reliability of the switch is improved; the maintenance-free service life of the on-load tap changer can be equal to the service life of the transformer body. The utility model adopts an insulation mounting main board with enough tolerance strength to fixedly mount each component so as to reduce the overall height of the on-load tap changer; meanwhile, a selector switch assembly and a change-over switch assembly of the on-load tap changer are both arranged on the same insulating installation mainboard, and driving transmission mechanisms of the on-load tap changer are controlled by the same mechanism in a time sequence mode, so that the on-load tap changer is simple and compact in structural design, and the overall design of the on-load tap changer is miniaturized. By adopting the scheme, the on-load tap changer has the characteristics of miniaturization, maintenance-free and high reliability, and is suitable for large-quantity distribution transformers. In the technical field, the utility model can be modified according to the preferred embodiment of the utility model, and for example, a motor mechanism such as a servo motor, a linear motor or a stepping motor can be used to replace the motor of the utility model to be driven in combination with a control program, and the utility model also belongs to the protection scope of the utility model. The preferred embodiment of the present invention is explained by the structure and principle of a miniaturized on-load tap changer with a tap position of 5, and the improved switches according to the present invention with other tap positions (3 th, 7 th, 9 th, 17 th, etc.) also belong to the protection scope of the present invention.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several changes and modifications may be made without departing from the technical principle of the present invention, and these changes and modifications should also be construed as the protection scope of the present invention.
Claims (10)
1. A miniaturized on-load voltage regulation switch is characterized by comprising a driving mechanism, a metal fixing plate, a selection switch assembly, a change-over switch assembly, a transition element, an insulation mounting main board and an insulation mounting support;
the driving mechanism comprises a motor, a gearbox, a driving shaft wheel, a transmission gear, a grooved wheel mechanism and a driving turntable;
each phase of the selective switch component comprises two moving contacts and a plurality of fixed contacts;
each phase of the change-over switch assembly comprises two vacuum arc-extinguishing chambers and two sets of driving arms;
the motor is connected with the gearbox and is arranged on the gearbox;
the gearbox is mounted on the metal fixing plate;
the driving shaft wheel is connected with the gearbox;
the driving shaft wheel is meshed with the transmission gear;
the moving contact is arranged on the driving turntable;
the plurality of fixed contacts, the change-over switch assembly and the transition element are all arranged on the insulation mounting main board;
the insulating mounting main board is connected with the metal fixing plate through three insulating mounting brackets;
the driving turntable is positioned on the lower side of the pressure bearing on the insulating mounting bracket;
the motor drives the transmission gear to rotate through the gearbox and the driving shaft, the transmission gear drives the geneva mechanism to act, the geneva mechanism drives the driving turntable to rotate, the driving turntable has a time sequence to drive the moving contact and the driving arm to act, the moving contact selects the corresponding fixed contact in the fixed contact assembly, and the driving arm drives the vacuum arc extinguish chamber to act to complete the conversion of voltage regulating gears.
2. The miniaturized on-load tap changer according to claim 1, wherein the geneva mechanism comprises a shift lever and a geneva wheel, the shift lever is fixedly connected with the transmission gear, one side of the geneva wheel is provided with a gear which is integrated with the geneva wheel, the transmission gear drives the shift lever thereon to rotate, the shift lever drives the geneva wheel to rotate, the geneva wheel rotates to drive the gear to rotate, and the gear is engaged with teeth on the driving turntable to drive the driving turntable to rotate.
3. A miniaturized on-load tap changer according to claim 1, characterized in that a cam is arranged on the driving turntable, and the cam drives the driving arm to move, and further drives the vacuum interrupter to be opened and closed.
4. The miniaturized on-load tap changer of claim 1, wherein a through square hole is formed in the middle of the protruding portion of the insulating mounting bracket, the pressure bearing is arranged in the square hole, the driving turntable is located below the pressure bearing, and the pressure bearing has a certain pressure on the driving turntable.
5. The miniaturized on-load tap changer of claim 1, wherein the driving arm comprises an arm rod A, an arm rod B and a connecting shaft, the arm rod A is positioned on the upper side of the insulation mounting main board, one end of the arm rod A is connected with the connecting shaft, and the other end of the arm rod A is in contact with the driving turntable; the connecting shaft is arranged on the insulating mounting main board in a penetrating manner; the arm rod B is positioned on the lower side of the insulating mounting main board, one end of the arm rod B is connected with the connecting shaft, and the other end of the arm rod B is connected with a moving contact of the vacuum arc-extinguishing chamber; the driving turntable drives the arm rod A to act, the arm rod A drives the arm rod B to act through the connecting shaft, and the arm rod B drives the vacuum arc extinguish chamber to act.
6. The miniaturized on-load tap changer of claim 1, wherein protrusions are arranged on the insulation mounting main board, the protrusions are arranged between the fixed contacts, and the protrusions are higher than the plane of the fixed contacts, so that the moving contact is prevented from short-circuiting two adjacent fixed contacts in the moving process.
7. The miniaturized on-load tap changer of claim 1, wherein the plurality of stationary contacts are connected to a tap of a voltage regulating winding of a high-voltage coil of a transformer, two vacuum interrupter chambers of each phase are electrically connected to each corresponding movable contact, and the transition element is electrically connected to one vacuum interrupter chamber of each phase.
8. A miniaturised on-load tap changer according to claim 1 characterised in that the gearbox is provided with connectors for communication.
9. A miniaturized on-load tap changer according to claim 1, wherein the three-phase selector switch assembly, the diverter switch assembly and the transition element are mounted on the insulated mounting board in a manner that trisects the insulated mounting board.
10. An on-load tap changing distribution transformer employing a miniaturized on-load tap changer of any of the preceding claims.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120392772.XU CN215896191U (en) | 2021-02-23 | 2021-02-23 | Miniaturized on-load tap changer and on-load tap changing distribution transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120392772.XU CN215896191U (en) | 2021-02-23 | 2021-02-23 | Miniaturized on-load tap changer and on-load tap changing distribution transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215896191U true CN215896191U (en) | 2022-02-22 |
Family
ID=80339251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120392772.XU Active CN215896191U (en) | 2021-02-23 | 2021-02-23 | Miniaturized on-load tap changer and on-load tap changing distribution transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215896191U (en) |
-
2021
- 2021-02-23 CN CN202120392772.XU patent/CN215896191U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101651029B (en) | Vacuum vessel switching core used by on-load tap-changer | |
| CN102360851A (en) | Combined permanent-magnetic mechanism voltage/capacity adjusting switch | |
| CN103563030B (en) | There is the tap changer improving construction of switch | |
| CN109411255A (en) | A kind of list resistance list vacuum loaded capacity regulating voltage regulating tap switch | |
| CN108511223B (en) | Horizontal on-load capacity-regulating voltage-regulating tapping switch | |
| CN101950712A (en) | Contactor with multi-group contact units | |
| CN111463038A (en) | Special on-load voltage regulating switch for distribution transformer and on-load voltage regulating distribution transformer | |
| CN215896191U (en) | Miniaturized on-load tap changer and on-load tap changing distribution transformer | |
| CN202772035U (en) | Indoor side-mounted vacuum circuit breaker | |
| CN107946053B (en) | Tapping switch of dry-type on-load capacity-regulating voltage-regulating transformer | |
| CN114597082A (en) | Miniaturized on-load tap changer and on-load tap changing distribution transformer | |
| CN210223811U (en) | Miniaturized on-load voltage regulation switch | |
| CN201812757U (en) | Contactor with several groups of contact units | |
| CN113345732A (en) | Miniaturized on-load voltage-regulating and capacitance-regulating switch and on-load voltage-regulating and capacitance-regulating transformer | |
| CN209804474U (en) | special on-load voltage regulating switch for distribution transformer and on-load voltage regulating distribution transformer | |
| CN210668120U (en) | On-load tap changer and transformer | |
| CN111048352A (en) | Special on-load voltage regulating switch for distribution transformer and on-load voltage regulating distribution transformer | |
| CN209981101U (en) | On-load voltage regulating switch | |
| CN101752070B (en) | Vacuum tube switching core used for M type on-load tap-changer | |
| CN111029116A (en) | On-load capacity-regulating switch of oil-immersed transformer and transformer | |
| CN208970424U (en) | A kind of dedicated on-load voltage regulating switch of distribution transformer and load tap changing distribution transformer | |
| CN2186435Y (en) | Load voltage regulating device of active bridge distribution transformer | |
| EP4084033A1 (en) | Vacuum interrupter module for a tap changer, power diverter switch, and tap changer | |
| CN210052658U (en) | A miniaturized option switch subassembly for on-load tap changer | |
| CN209981027U (en) | Novel voltage regulating module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |