CN217361447U - Horizontal on-load capacity-regulating tap switch - Google Patents

Abstract

The utility model discloses a horizontal on-load capacitance-regulating tapping switch, include the casing and be fixed in vacuum arc extinguishing subassembly, duplex position switching module, low voltage contact subassembly and wiring subassembly in the casing, the casing includes insulating substrate, wiring subassembly is equipped with a plurality of first wiring pieces, first wiring piece carries out the overlap joint with the tap of transformer high-pressure side, wiring subassembly still is equipped with a plurality of second wiring pieces, second wiring piece carries out the overlap joint with the tap of transformer low-pressure side, duplex position switching module includes movable contact group and stationary contact group, vacuum arc extinguishing subassembly can break off under first drive assembly's the sharp drive with movable contact group with the electricity of stationary contact group is connected and is carried out vacuum arc extinguishing. Adopt the utility model discloses, can be at capacity exchange in-process non-staining transformer oil, prolong the life-span of movable contact group, the overall arrangement is compact moreover, small, can effectively reduce switching cost and transformer cost.

Description

Horizontal on-load capacity-regulating tap switch

Technical Field

The utility model relates to a power equipment technical field especially relates to a horizontal on-load capacitance-regulating tapping switch.

Background

Still there is horizontal on-load to transfer and hold tap-changer in the existing market, and traditional drum type has to carry to transfer and hold pressure regulating tap-changer device dress in transformer one side, and is bulky moreover, great increase the volume and the cost of transformer, and the inside wiring is complicated, the assembly difficulty, it is very inconvenient to use. The novel horizontal on-load capacitance-regulating voltage-regulating tap-changer device that appears in the market in nearly one or two years, what the closure and the disconnection between the inside high-pressure side movable contact of its switch adopted is traditional mechanical type patting structural style, at the accent appearance in-process, switch high-pressure side contact can produce electric arc at the in-process of closure and disconnection, can seriously influence the contact life and pollute the inside insulating oil of switch, the insulating properties of switch has been reduced, unfavorable to the life-span of switch, and the inside complicated problem of walking the line of switch also can not be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a horizontal on-load capacitance-regulating tapping switch is provided, can change the in-process non-staining transformer oil at capacity, prolong the life-span of movable contact group, the overall arrangement is compact moreover, small, can effectively reduce switching cost and transformer cost.

In order to solve the technical problem, the utility model provides a horizontal on-load capacitance-regulating tapping switch for realize the capacity change to the transformer, include the casing and be fixed in first drive assembly, second drive assembly, vacuum arc extinguishing subassembly, duplex position switching module, low pressure contact subassembly and wiring subassembly in the casing, the casing includes insulating substrate, the wiring subassembly is equipped with a plurality of first wiring pieces, first wiring piece carries out the overlap joint with the tap of transformer high-pressure side, the wiring subassembly still is equipped with a plurality of second wiring pieces, the second wiring piece carries out the overlap joint with the tap of transformer low-pressure side.

The double-station switching assembly comprises a movable contact group and a fixed contact group, the movable contact group and the fixed contact group can be electrically connected with the first wiring piece through the vacuum arc extinguishing assembly, the movable contact group can be in contact connection with different end parts of the fixed contact group under the linear driving of the second driving assembly so as to be connected with different taps on the high-voltage side of the transformer, and the vacuum arc extinguishing assembly can be in disconnection with the electric connection of the movable contact group and the fixed contact group under the linear driving of the first driving assembly and performs vacuum arc extinguishing.

The low-voltage contact assembly is provided with a contact clamp, and the contact clamp can be in contact connection with different second wiring pieces under the linear driving of the second driving assembly so as to switch different taps connected with the low-voltage side of the transformer.

As an improvement of the above scheme, the moving contact group includes a first moving contact, a second moving contact and a first lug, the first moving contact and the second moving contact are coaxially arranged and have opposite directions, the first moving contact and the second moving contact are fixedly connected, and the first lug is fixed between the first moving contact and the second moving contact.

As an improvement of the above scheme, the double-station switching assembly further includes a fixed seat, the fixed seat is connected to the movable end of the second driving assembly, the fixed seat is provided with a first guide hole and a second guide hole, the first guide hole and the second guide hole are the same in size and are coaxially arranged, the first moving contact can horizontally slide in the first guide hole, and the second moving contact can horizontally slide in the second guide hole.

As an improvement of the above scheme, the stationary contact group is fixed on the insulating substrate, and the stationary contact group further includes a first stationary contact and a second stationary contact, one end of the first stationary contact is electrically connected to the first wiring member, the other end of the first stationary contact is electrically connected to the first movable contact, one end of the second stationary contact is electrically connected to the first wiring member, and the other end of the second stationary contact is electrically connected to the second movable contact.

The direction of the first fixed contact is opposite to the direction of the second fixed contact.

As an improvement, the low-voltage contact assembly further comprises a mounting seat and a guide shaft, the contact clip is fixed on the mounting seat, the guide shaft vertically penetrates through the contact clip, the contact clip can move upwards or downwards on the mounting seat along the guide shaft, and the contact clip can clip the second wiring piece to form electrical connection.

As an improvement of the above scheme, the vacuum arc extinguishing assembly includes a vacuum tube and a second lug, the vacuum tube is fixed on the insulating substrate, one end of the second lug is electrically connected with the movable end of the vacuum tube, and the other end of the second lug is electrically connected with the first lug.

As an improvement of the above scheme, the first driving assembly includes a first driving member and a first driving rod, the first driving member is fixed on the insulating substrate, one end of the first driving rod is connected to the movable end of the first driving member, the other end of the first driving rod is connected to the movable end of the vacuum tube, and the first driving member can drive the movable end of the vacuum tube to reciprocate in the horizontal direction through the first driving rod.

The first driving piece is driven in a linear mode.

As an improvement of the above scheme, the second driving assembly includes a second driving element and a second driving rod, the second driving element is fixed on the insulating substrate, the second driving rod is connected with a movable end of the second driving element, the mounting seat is fixed on the second driving rod, and the second driving element can drive the mounting seat to reciprocate in the horizontal direction through the second driving rod.

The driving mode of the second driving piece is linear driving.

As an improvement of the above scheme, the second driving assembly further includes a third driving rod, the third driving rod is connected to the movable end of the second driving element, the fixing seat is fixed to the third driving rod, and the second driving element can drive the fixing seat to reciprocate in the horizontal direction through the third driving rod.

As an improvement of the above, the housing further includes a high-pressure side sealing plate and a low-pressure side sealing plate, the first wiring member passes through the high-pressure side sealing plate, and the second wiring member passes through the low-pressure side sealing plate.

Implement the utility model discloses, following beneficial effect has:

(1) the whole horizontal on-load capacitance-regulating tap changer is simple and reliable in structure, few in integral parts, simple in internal wiring and convenient to install, and the volume of the transformer can be effectively reduced, so that the manufacturing cost of the transformer is reduced;

(2) the high-voltage side adopts a combination of a low-voltage vacuum tube and a mechanical contact, namely the vacuum arc extinguishing assembly and the double-station switching assembly, so that the expensive cost of adopting the high-voltage vacuum tube is saved, the arc can be ensured to be extinguished in the low-voltage vacuum tube, and the manufacturing cost is effectively reduced;

(3) in the capacity exchange process of the transformer, the double-station switching assembly can realize non-arc switching and can avoid the pollution of insulating oil, so that a switch does not need to be made into a full-sealing structure, and the manufacturing cost can be further reduced;

(4) the first driving piece and the second driving piece are used as power devices, a linear driving mode is adopted, the driving mode is simple and reliable, and the mechanical life is long.

Drawings

Fig. 1 is a schematic structural view of the horizontal on-load capacity-regulating tap changer after being assembled;

fig. 2 is a schematic structural diagram of the other side of the horizontal on-load capacity-regulating tap-changer after being assembled;

fig. 3 is a schematic structural diagram of the first state of the horizontal on-load capacitance-regulating tap changer of the present invention;

FIG. 4 is a partial view of A of FIG. 3;

fig. 5 is a schematic structural diagram of the horizontal on-load capacitance-regulating tap changer in the second state;

fig. 6 is a schematic structural view of the first driving rod of the present invention;

fig. 7 is a schematic structural diagram of the low-voltage contact assembly of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings. Only this statement, the utility model discloses the upper and lower, left and right, preceding, back, inside and outside etc. position words that appear or will appear in the text only use the utility model discloses an attached drawing is the benchmark, and it is not right the utility model discloses a concrete restriction.

Referring to fig. 1, 2 and 3, the embodiment of the utility model discloses a horizontal on-load capacitance-regulating tap changer for realize capacity change to the transformer, including casing 1 and be fixed in first drive assembly 2, second drive assembly 3, vacuum arc extinguishing subassembly 4, duplex position switching module 5, low voltage contact subassembly 6 and wiring subassembly 7 in the casing 1, casing 1 includes insulating substrate 11, wiring subassembly 7 is equipped with a plurality of first wiring pieces 71, first wiring piece 71 overlaps with the tap of transformer high-pressure side, preferably, the quantity of first wiring piece 71 is 6, overlaps with the tap of the three-phase winding of transformer high-pressure side respectively, realizes "Y- |" conversion of transformer high-pressure side winding when regulating the capacitor. The wiring assembly 7 is further provided with a plurality of second wiring pieces 72, the second wiring pieces 72 are overlapped with taps on the low-voltage side of the transformer, preferably, the number of the second wiring pieces 72 is 12, and the second wiring pieces are respectively overlapped with taps of the three-phase winding on the low-voltage side of the transformer, so that the series-parallel conversion of the windings on the low-voltage side of the transformer is realized. The first wire member 71 is preferably a wire terminal, and the second wire member 72 is preferably a copper wiring bar.

Referring to fig. 4, the double-station switching assembly 5 includes a movable contact group 51 and a stationary contact group 52, the movable contact group 51 and the stationary contact group 52 can be electrically connected to the first wiring member 71 through the vacuum arc-extinguishing assembly 4, when the vacuum arc-extinguishing assembly 4 is opened, the movable contact group 51 and the stationary contact group 52 are disconnected from the first wiring member 71, and when the vacuum arc-extinguishing assembly 4 is closed, the movable contact group 51 and the stationary contact group 52 are conducted with the first wiring member 71. In order to smoothly switch the taps on the high-voltage side of the transformer, the movable contact group 51 can be in contact connection with different ends of the fixed contact group 52 under the driving of the second driving assembly 3, different ends of the fixed contact group 52 are electrically connected with different first wiring pieces 71, so that the movable contact group 51 can be connected with different taps on the high-voltage side of the transformer, and the vacuum arc extinguishing assembly 4 can be driven by the first driving assembly 2 to break the electrical connection with the movable contact group 51 and the fixed contact group 52 and perform vacuum arc extinguishing. The vacuum arc extinguishing assembly 4 is equivalent to transferring a closing point between the movable contact group 51 and the fixed contact group 52 into the vacuum arc extinguishing assembly 4, and when tap switching is required, the vacuum arc extinguishing assembly 4 is firstly disconnected, so that electric arcs are generated and extinguished in the vacuum tube 41, and the generation position of the electric arcs is transferred, thereby not only avoiding pollution to transformer oil, but also protecting the contacts of the movable contact group 51 and the fixed contact group 52, and prolonging the service life of the contacts.

Referring to fig. 7, the low voltage contact assembly 6 is provided with a contact clip 61, the contact clip 61 is in close contact with the second wiring member 72 through a clip structure, and the contact clip 61 can be in contact connection with different second wiring members 72 under the driving of the second driving assembly 3 to connect different taps on the low voltage side of the transformer. Preferably, the second driving member 31 can drive the movable contact group 51 and the contact clip 61 at the same time, so as to realize the simultaneous switching of the transformer high-voltage side tap and the transformer low-voltage side tap.

The embodiment of the utility model provides a beneficial effect as follows:

when the transformer is capacity-exchanged, the vacuum arc-extinguishing assembly 4 is first opened and the arc is extinguished in the vacuum arc-extinguishing assembly 4, and then the moving contact set 51 is adjusted to contact a different stationary contact set 52 to switch the tap on the high-voltage side of the transformer, and the contact clamp 61 is simultaneously changed to contact the second wiring member 72 to switch the tap on the low-voltage side of the transformer. The vacuum arc extinguishing component 4 is a low-voltage vacuum tube 41, in the whole replacement process, the structure of the low-voltage vacuum tube 41 and a mechanical contact is used for replacing the traditional pure mechanical contact structure, the vacuum arc extinguishing component 4 is used for extinguishing electric arcs, the double-station switching component 5 is used for ensuring that an enough opening distance exists between the movable contact group and the fixed contact group 52, the electric arcs are generated and extinguished in the vacuum arc extinguishing component 4, therefore, no pollution is caused to external transformer oil, meanwhile, the movable contact group is protected by the transfer of the position of the electric arcs, and the service lives of the movable contact group and the insulating oil in the switch are prolonged.

Referring to fig. 4, the moving contact group 51 includes a first moving contact 511, a second moving contact 512 and a first lug 513, the first moving contact 511 and the second moving contact 512 are coaxially disposed and oppositely oriented, so as to provide conditions for the first moving contact 511 and the second moving contact 512 to contact different ends of the stationary contact group 52, the first lug 513 is fixed between the first moving contact 511 and the second moving contact 512, and in order to stably fix the first lug 513, the first moving contact 511 and the second moving contact 512 are fixedly connected. Specifically, the first moving contact 511 is provided with an internal thread, and the second moving contact 512 is provided with an external thread. The first movable contact 511 and the second movable contact 512 are fixedly connected with each other through the matching of the external thread and the internal thread. The movable contact group further comprises an elastic pad, the elastic pad and the first moving contact 511 are sleeved with the first lug 513, the first moving contact 511 is connected with the second moving contact 512 in a threaded mode, the side end face of the first moving contact 511 and the side end face of the second moving contact 512 can compress the first lug 513 and the elastic pad, and therefore the first lug 513 and the elastic pad can be fixed between the first moving contact 511 and the second moving contact 512, and the fixing effect of the first lug 513 is further guaranteed.

The double-station switching assembly 5 further comprises a fixed seat 53, the fixed seat 53 is connected with the movable end of the second driving assembly 3, a first guide hole 531 and a second guide hole 532 are arranged on the fixed seat 53, the first guide hole 531 and the second guide hole 532 are the same in size and are coaxially arranged, the first moving contact 511 can horizontally slide in the first guide hole 531, and the second moving contact 512 can horizontally slide in the second guide hole 532. The first guide hole 531 and the second guide hole 532 which are coaxially arranged can ensure that the first movable contact 511 and the second movable contact 512 can coaxially move, and further ensure the stability of the movable contact group during movement. In order to ensure the contact effect between the moving contact set and the fixed contact set 52, a first return spring 54 is disposed between the first moving contact 511 and the side of the first guiding hole 531, and a second return spring 55 is disposed between the second moving contact 512 and the side of the second guiding hole 532.

During installation, the first movable contact 511 and the second movable contact 512 are firstly sleeved in the first return spring 54 and the second return spring 55 respectively, then the first movable contact 511 and the second movable contact 512 are inserted through the first guiding hole 531 and the second guiding hole 532 on the fixed seat 53, then the first lug 513 and the spring pad are sleeved on the connection end of the second movable contact 512 with an external thread, and finally the first movable contact 511 and the second movable contact 512 are screwed together through a screw thread fit, and the first lug 513 is fixed.

The fixed contact group 52 is fixed on the insulating substrate 11, the fixed contact group 52 further includes a first fixed contact 521 and a second fixed contact 522, one end of the first fixed contact 521 is electrically connected to the first wiring member 71, the other end of the first fixed contact is electrically connected to the first movable contact 511, one end of the second fixed contact 522 is electrically connected to the first wiring member 71, the other end of the second fixed contact is electrically connected to the second movable contact 512, and the positions of the first wiring member 71 to which the first fixed contact 521 and the second fixed contact 522 are connected are different. In order to correspond to the positions of the first movable contact 511 and the second movable contact 512, the first fixed contact 521 and the second fixed contact 522 are oppositely oriented, so that the first movable contact 511 can contact the first fixed contact 521 and the second movable contact 512 can contact the second fixed contact 522.

The low-voltage contact assembly 6 further comprises a mounting base 62 and a guide shaft 63, the contact clamp 61 is fixed on the mounting base 62, the guide shaft 63 vertically penetrates through the contact clamp 61, the contact clamp 61 can move upwards or downwards on the mounting base 62 along the guide shaft 63 so as to clamp the second wiring member 72, and the contact clamp 61 clamps the second wiring member 72 to form an electric connection. The second wiring pieces 72 are arranged horizontally, and the contact clips 61 can move horizontally under the driving of the second driving assembly 3, so as to be connected with the second wiring pieces 72 at different positions, thereby realizing the switching of different taps.

The vacuum arc extinguishing assembly 4 comprises a vacuum tube 41 and a second lug 42, the vacuum tube 41 is fixed on the insulating substrate 11, one end of the second lug 42 is electrically connected with the movable end of the vacuum tube 41, and the other end of the second lug 42 is electrically connected with the first lug 513. The first driving assembly 2 comprises a first driving member 21 and a first driving rod 22, the first driving member 21 is fixed on the insulating substrate 11, one end of the first driving rod 22 is connected with the movable end of the first driving member 21, the other end of the first driving rod is connected with the movable end of the vacuum tube 41, and the first driving member 21 can drive the movable end of the vacuum tube 41 to reciprocate in the horizontal direction through the first driving rod 22. The first driving rod 22 is provided with a U-shaped push block 221, the U-shaped push block 221 is connected with the inside of the vacuum tube 41, and the first driving member 21 can drive the vacuum tube 41 to be electrically connected in an open or close manner by using the U-shaped push block 221.

The second driving assembly 3 includes a second driving member 31 and a second driving rod 32, and the second driving member 31 is preferably an electromagnetic driving member and is driven linearly. The second driving component 31 is fixed on the insulating substrate 11, the second driving rod 32 is connected to the movable end of the second driving component 31, the mounting seat 62 is fixed on the second driving rod 32, the second driving component 31 can be driven by the second driving rod 32 to move the mounting seat 62 in the horizontal direction, so as to drive the contact clamp 61 to move. The second driving assembly 3 further includes a third driving rod 33, the third driving rod 33 is connected to the movable end of the second driving member 31, the fixing seat 53 is fixed on the third driving rod 33, and the second driving member 31 can drive the fixing seat 53 to reciprocate in the horizontal direction through the third driving rod 33, so as to drive the moving contact set to move. The second driving member 31 drives the second driving rod 32 and the third driving rod 33 simultaneously, so that the contact clip 61 and the movable contact group move simultaneously, the taps of the low-voltage side and the taps of the high-voltage side of the transformer are switched simultaneously, and the switching of the series connection or the parallel connection of the low-voltage side is completed while the switching of the Y-delta connection of the high-voltage side is completed.

Referring to fig. 3 and 5, in fig. 3, the horizontal on-load capacitance-regulating tap changer is in a first state, when a transformer needs to be capacity-exchanged, the first driving member 21 first drives the U-shaped push block 221 to electrically disconnect the vacuum tube 41 through the first driving rod 22, an arc is generated in the vacuum tube 41, after the arc is extinguished in the vacuum tube 41, the second driving member 31 starts to drive the mounting base 62 to slide through the second driving rod 32, and simultaneously drives the fixed base 53 to slide through the third driving rod 33, the mounting base 62 drives the contacts to slide in different second wiring members 72 to complete "series" or "parallel" conversion on a low-voltage side, the fixed base 53 drives the first movable contact 511 and the second movable contact 512 to select the corresponding first fixed contact 521 or the second fixed contact 522 to electrically connect, and completing the "Y- Δ" conversion on the high-voltage side of the transformer, wherein the second driving element 31 is in a stop-in-place state, and at the same time, the first driving element 21 starts to release pressure to push the first driving rod 22 to return to the initial state, and the vacuum tube 41 returns to a conducting state, as shown in fig. 5, at this time, the horizontal on-load capacitance-regulating tap-changer is in a second state, so as to realize the capacity exchange of the transformer.

In order to achieve the encapsulation and the electrical conduction, the housing 1 further comprises a high-voltage side sealing plate 12 and a low-voltage side sealing plate 13, the first wiring piece 71 passes through the high-voltage side sealing plate 12 to be connected with a tap on the high-voltage side of the transformer in an overlapping manner, and the second wiring piece 72 passes through the low-voltage side sealing plate 13 to be connected with a tap on the low-voltage side of the transformer in an overlapping manner.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims (10)

1. A horizontal on-load capacity-regulating tap switch is used for realizing capacity exchange of a transformer and is characterized by comprising a shell, a first driving assembly, a second driving assembly, a vacuum arc extinguishing assembly, a double-station switching assembly, a low-voltage contact assembly and a wiring assembly, wherein the first driving assembly, the second driving assembly, the vacuum arc extinguishing assembly, the double-station switching assembly, the low-voltage contact assembly and the wiring assembly are fixed in the shell;

the double-station switching assembly comprises a movable contact group and a fixed contact group, the movable contact group and the fixed contact group can be electrically connected with the first wiring piece through the vacuum arc extinguishing assembly, the movable contact group can be in contact connection with different end parts of the fixed contact group under the linear driving of the second driving assembly so as to be connected with different taps on the high-voltage side of the transformer, and the vacuum arc extinguishing assembly can be disconnected from the movable contact group and the fixed contact group under the linear driving of the first driving assembly and perform vacuum arc extinguishing;

the low-voltage contact assembly is provided with a contact clamp, and the contact clamp can be in contact connection with different second wiring pieces under the linear driving of the second driving assembly so as to switch different taps connected with the low-voltage side of the transformer.

2. The horizontal on-load capacitance-regulating tap switch according to claim 1, wherein the moving contact group comprises a first moving contact, a second moving contact and a first terminal lug, the first moving contact and the second moving contact are coaxially arranged and face opposite directions, the first moving contact and the second moving contact are fixedly connected, and the first terminal lug is fixed between the first moving contact and the second moving contact.

3. The horizontal on-load capacitance-regulating tap switch according to claim 2, wherein the double-station switching assembly further comprises a fixed seat, the fixed seat is connected with the movable end of the second driving assembly, a first guide hole and a second guide hole are formed in the fixed seat, the first guide hole and the second guide hole are the same in size and are coaxially arranged, the first moving contact can horizontally slide in the first guide hole, and the second moving contact can horizontally slide in the second guide hole.

4. The horizontal on-load capacitance-regulating tap switch according to claim 2, wherein the stationary contact group is fixed on the insulating substrate, the stationary contact group further comprises a first stationary contact and a second stationary contact, one end of the first stationary contact is electrically connected to the first wiring member, the other end of the first stationary contact is electrically connectable to the first movable contact, one end of the second stationary contact is electrically connected to the first wiring member, and the other end of the second stationary contact is electrically connectable to the second movable contact;

the direction of the first fixed contact is opposite to the direction of the second fixed contact.

5. The horizontal on-load tap changer of claim 3, wherein the low voltage contact assembly further comprises a mounting base and a guide shaft, the contact clip is fixed on the mounting base, the guide shaft vertically penetrates through the contact clip, the contact clip can move upwards or downwards on the mounting base along the guide shaft, and the contact clip can clip the second wiring member to form an electrical connection.

6. The horizontal on-load capacitance-regulating tap switch according to claim 2, wherein the vacuum arc extinguishing assembly comprises a vacuum tube and a second lug, the vacuum tube is fixed on the insulating substrate, one end of the second lug is electrically connected with the movable end of the vacuum tube, and the other end of the second lug is electrically connected with the first lug.

7. The horizontal on-load capacitance-regulating tap switch according to claim 6, wherein the first driving assembly comprises a first driving member and a first driving rod, the first driving member is fixed on the insulating substrate, one end of the first driving rod is connected with the movable end of the first driving member, the other end of the first driving rod is connected with the movable end of the vacuum tube, and the first driving member can drive the movable end of the vacuum tube to reciprocate in the horizontal direction through the first driving rod;

the first driving piece is driven in a linear mode.

8. The horizontal on-load capacitance-regulating tap changer according to claim 5, wherein the second driving assembly comprises a second driving element and a second driving rod, the second driving element is fixed on the insulating substrate, the second driving rod is connected with a movable end of the second driving element, the mounting seat is fixed on the second driving rod, and the second driving element can drive the mounting seat to reciprocate in a horizontal direction through the second driving rod;

the driving mode of the second driving piece is linear driving.

9. The horizontal on-load capacitance-regulating tap switch according to claim 8, wherein the second driving assembly further comprises a third driving rod, the third driving rod is connected with the movable end of the second driving member, the fixing seat is fixed on the third driving rod, and the second driving member can drive the fixing seat to reciprocate in the horizontal direction through the third driving rod.

10. The horizontal on-load tap changer of claim 1, wherein the housing further comprises a high-pressure side sealing plate through which the first terminal piece passes and a low-pressure side sealing plate through which the second terminal piece passes.

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