Three-position switch and switch cabinet
By designing a three-position switch, the operating handle and actuating rod are used to move the operating rod, controlling the connection between the conductive rod and the busbar or grounding bar. This solves the problem of inaccurate operation of the direct-acting PT knife switch and improves the accuracy and safety of operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU TOSHIBA BAIYUN ELECTRICAL EQUIP
- Filing Date
- 2025-04-11
- Publication Date
- 2026-04-28
AI Technical Summary
When staff manually push and pull the direct-acting PT spacer, they are prone to problems such as incomplete movements and poor operational accuracy.
A three-position switch is adopted, including an operating rod, a conductive rod, a transmission component, a housing, an actuating rod, and an operating handle. By rotating the operating handle, the actuating rod is rotated, which in turn moves the operating rod. The transmission component controls the connection between the conductive rod and the busbar or grounding bar, replacing manual push-pull operation and improving operational accuracy.
It improves operational accuracy, avoids incomplete actions caused by directly pushing or pulling the lever, and enhances operational safety and reliability.
Smart Images
Figure CN224177236U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power system technology, and in particular to a three-position switch and switch cabinet. Background Technology
[0002] Voltage transformers (PTs) are commonly used components in switchgear. They convert voltage in high-voltage systems to voltage in low-voltage systems for measurement and monitoring. During maintenance and repair, it is necessary to control the connection and disconnection of the busbar and the voltage transformer. Specifically, when the voltage transformer is needed, it is connected to the main busbar; when it is not needed, the connection is disconnected.
[0003] In existing technologies, direct-acting PT disconnectors are used to isolate voltage transformers from the power system for opening and closing. However, when operators manually push and pull the direct-acting PT disconnectors, incomplete operation is very likely to occur, resulting in poor operational accuracy.
[0004] Therefore, there is an urgent need to provide a three-position switch and switch cabinet to solve the problem that existing manual push-pull direct-acting PT disconnectors are prone to incomplete operation and poor operational accuracy. Utility Model Content
[0005] The purpose of this utility model is to provide a three-position switch and switch cabinet to solve the problem that the existing manual push and pull of the direct-acting PT spacer is prone to incomplete action and poor operation accuracy.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] This utility model provides a three-position switch for installation on the cabinet of a switchgear. The cabinet contains a busbar and a grounding bar. The three-position switch includes an operating rod, a conductive rod, and a transmission assembly connecting the operating rod and the conductive rod. The operating rod slides through the cabinet, and the conductive rod slides within a voltage transformer cone located inside the cabinet. Movement of the operating rod, via the transmission assembly, drives the conductive rod to move, thereby connecting the conductive rod to the busbar or the grounding bar. The three-position switch also includes:
[0008] The device includes a housing, an actuating lever, and an operating handle. The housing is used to fix the device to the cabinet. The actuating lever is rotatably connected to the housing. The first end of the actuating lever is threadedly connected to the operating rod, and the second end of the actuating lever is drively connected to the operating handle. Rotation of the operating handle drives the actuating lever to rotate, and rotation of the actuating lever drives the operating rod to move.
[0009] As an optional technical solution for a three-position switch, the housing is located outside the cabinet, and the connection between the actuating rod and the operating rod is located inside the housing.
[0010] As an optional technical solution for a three-position switch, it also includes a pressing plate and a position indicator. The pressing plate is fixed to one end of the operating rod located outside the cabinet. The position indicator is fixed inside the housing and at least partially exposed outside the housing. The movement of the operating rod drives the pressing plate to move, so that the pressing plate selectively approaches and presses against the position indicator to trigger it.
[0011] As an optional technical solution for a three-position switch, a micro switch is also included. The micro switch is fixed inside the housing and is spaced apart from the position indicator so that the pressure plate can synchronously press and trigger the position indicator and the micro switch.
[0012] As an optional technical solution for a three-position switch, it also includes a fixed bracket, which is fixed inside the housing, and the actuating rod passes through the fixed bracket and is rotatably connected to the fixed bracket.
[0013] As an optional technical solution for a three-position switch, the housing is provided with an operating port, and the operating handle passes through the operating port and is connected to the second end of the actuating rod.
[0014] As an optional technical solution for a three-position switch, the operating handle is detachably connected to the actuating rod. The three-position switch also includes a control component, a transmission component, and a blocking component. The blocking component is slidably disposed between the housing and the fixed bracket. The blocking component is connected to the control component through the transmission component.
[0015] The control component drives the transmission component to move the blocking component, so that the blocking component selectively closes or opens the operating port. When the operating port is open, the operating handle can pass through the operating port and connect with the actuating rod.
[0016] As an optional technical solution for a three-position switch, one of the shielding member and the housing is provided with a guide hole, and the other is provided with a protrusion, the protrusion being slidably inserted through the guide hole.
[0017] As an optional technical solution for a three-position switch, at least two guide holes are arranged side by side at intervals, and the protrusions are arranged in a one-to-one correspondence with the guide holes.
[0018] This utility model provides a switch cabinet, including a cabinet body, a busbar, a grounding busbar, an inner cone of a voltage transformer, and the aforementioned three-position switch.
[0019] Beneficial effects:
[0020] This utility model provides a three-position switch, which is used to install on the cabinet of a switch cabinet. The cabinet is equipped with a busbar and a grounding bar. The three-position switch includes an operating rod, a conductive rod, and a transmission assembly connecting the operating rod and the conductive rod. The operating rod slides through the cabinet, and the conductive rod slides inside the voltage transformer cone located in the cabinet. The movement of the operating rod drives the conductive rod to move through the transmission assembly, so that the conductive rod is connected to the busbar or the grounding bar. The three-position switch also includes a housing, an actuating rod, and an operating handle. The housing is used to fix it to the cabinet, and the actuating rod is rotatably connected to the housing. The first end of the actuating rod is threadedly connected to the operating rod, and the second end of the actuating rod is drivenly connected to the operating handle. The rotation of the operating handle drives the rotation of the actuating rod, and the rotation of the actuating rod drives the movement of the operating rod. By adding a casing, an actuating lever, and an operating handle, the operator rotates the operating handle to rotate the actuating lever, which in turn moves the operating rod. The movement of the operating rod, through a transmission component, moves the conductive rod, allowing the conductive rod to connect with the busbar or grounding bar. This replaces the existing manual push-pull operation method of the operating rod, helps to control the movement distance of the operating rod, and thus accurately controls the movement of the conductive rod, improving operational accuracy and avoiding incomplete actions caused by directly pushing or pulling the operating rod.
[0021] This utility model provides a switch cabinet, including a cabinet body, busbar, grounding busbar, voltage transformer inner cone, and the aforementioned three-position switch. By using an operating handle to control the conductive rod, the accuracy and safety of operation are effectively improved. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the three-position switch in the closed state provided in this embodiment of the utility model;
[0023] Figure 2 This is a partial structural diagram of the three-position switch in the open state provided in this embodiment of the utility model;
[0024] Figure 3 This is a partial cross-sectional view of the three-position switch in the closed state provided in this embodiment of the utility model;
[0025] Figure 4 This is a partial cross-sectional view of the three-position switch in the open state provided in this embodiment of the utility model;
[0026] Figure 5 This is a schematic diagram of the closed state of the position indicator provided in this embodiment of the utility model;
[0027] Figure 6 This is a schematic diagram of the open state of the position indicator provided in this embodiment of the utility model;
[0028] Figure 7This is a first-view structural schematic diagram of the fixed bracket provided in an embodiment of the present invention;
[0029] Figure 8 This is a structural schematic diagram of the fixed bracket provided in an embodiment of the present invention from a second perspective;
[0030] Figure 9 This is a schematic diagram of the structure of the outer shell and the fixing bracket provided in the embodiment of this utility model;
[0031] Figure 10 This is a schematic diagram of the structure of the three-position switch part provided in this embodiment of the utility model;
[0032] Figure 11 This is a structural schematic diagram of the shielding component provided in the embodiment of the present utility model from a first-view perspective;
[0033] Figure 12 This is a structural schematic diagram of the shielding component from a second perspective provided in an embodiment of this utility model.
[0034] In the picture:
[0035] 11. Operating lever; 12. Transmission assembly; 121. Base; 122. Swing lever; 123. Rotating shaft; 13. Conductive rod; 14. Ejector pin; 15. Pressing plate; 16. Actuating lever; 17. Operating handle; 18. Housing; 181. Operating port; 182. Display slot; 183. Indicator mark; 184. Protrusion; 19. Fixing bracket;
[0036] 21. Position indicator; 22. Micro switch;
[0037] 31. Transmission component; 32. Shielding component; 321. Connecting plate; 322. Shielding plate; 3221. Guide hole;
[0038] 40. Cabinet; 41. Busbar; 42. Grounding busbar; 43. Voltage transformer inner cone. Detailed Implementation
[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not the entire structure.
[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0042] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0043] like Figures 1 to 6As shown, this embodiment provides a three-position switch and switch cabinet. The switch cabinet includes a cabinet 40, a busbar 41, a grounding busbar 42, a voltage transformer inner cone 43, and a three-position switch. The three-position switch is installed on the cabinet 40 of the switchgear. The cabinet 40 contains a busbar 41 and a grounding bar 42. The three-position switch includes an operating rod 11, a conductive rod 13, and a transmission assembly 12 connecting the operating rod 11 and the conductive rod 13. The operating rod 11 slides through the cabinet 40, and the conductive rod 13 slides within the inner cone 43 of the voltage transformer located in the cabinet 40. The movement of the operating rod 11 drives the conductive rod 13 to move through the transmission assembly 12, so that the conductive rod 13 is connected to the busbar 41 or the grounding bar 42. The three-position switch also includes a housing 18, an actuating rod 16, and an operating handle 17. The housing 18 is used to fix it to the cabinet 40. The actuating rod 16 is rotatably connected to the housing 18. The first end of the actuating rod 16 is threadedly connected to the operating rod 11, and the second end of the actuating rod 16 is drively connected to the operating handle 17. The rotation of the operating handle 17 drives the rotation of the actuating rod 16, and the rotation of the actuating rod 16 drives the movement of the operating rod 11.
[0044] By adding a housing 18, an actuating lever 16, and an operating handle 17, the operator rotates the operating handle 17 to drive the actuating lever 16 to rotate, which in turn drives the operating rod 11 to move. The movement of the operating rod 11 drives the conductive rod 13 to move through the transmission assembly 12, so that the conductive rod 13 can be connected to the busbar 41 or the grounding busbar 42. This replaces the existing manual pushing and pulling operation of the operating rod 11, which helps to control the movement distance of the operating rod 11, thereby accurately controlling the movement of the conductive rod 13, improving the accuracy of operation, and avoiding incomplete operation caused by directly pushing and pulling the operating rod 11.
[0045] Specifically, the outer casing 18 is located outside the cabinet 40, while the connection between the actuating lever 16 and the operating lever 11 is located inside the outer casing 18. By providing the outer casing 18 on the cabinet 40, the connection between the actuating lever 16 and the operating lever 11 is protected, preventing impurities from entering and extending service life.
[0046] Optionally, both ends of the conductive rod 13 are provided with pins 14, and an elastic element (not shown) is provided between the pins 14 and the conductive rod 13. The first end of the conductive rod 13 is connected to the busbar 41 through the pins 14 to close the circuit, or the second end of the conductive rod 13 is connected to the grounding busbar 42 through the pins 14 to open the circuit. By providing pins 14 at both ends of the conductive rod 13 and an elastic element between the conductive rod 13 and the pins 14, the pins 14 are connected to the busbar 41 or the grounding busbar 42 under the action of the elastic element. This ensures a tight connection and also allows the pins 14 to disperse the charge to reduce the charge density at the tip, thereby reducing the possibility of tip discharge and effectively improving the stability of the disconnecting switch in the power system. In this embodiment, the elastic element is located inside the conductive rod 13 and is a spring.
[0047] See Figure 1 and Figure 2 Specifically, the transmission assembly 12 includes a base 121, a swing rod 122, and a rotating shaft 123. The base 121 is fixed on the cabinet 40. The swing rod 122 is rotatably mounted on the base 121. The first end of the swing rod 122 is hinged to the operating rod 11, and the second end of the swing rod 122 is slidably connected to the conductive rod 13. The movement of the operating rod 11 drives the swing rod 122 to rotate, thereby pulling the conductive rod 13 to move. There are three conductive rods 13, and the swing rod 122 is arranged in a one-to-one correspondence with the conductive rod 13. Each swing rod 122 is fixedly connected to the rotating shaft 123 and is rotatably mounted on the base 121 through the rotating shaft 123. The operating rod 11 connects to one of the swing rods 122 to drive one of the swing rods 122 and the rotating shaft 123 to rotate, and the rotation of the rotating shaft 123 drives the remaining swing rods 122 to rotate.
[0048] By setting three conductive rods 13 and corresponding swing rods 122 to correspond to the three-phase circuit, and by rotating a shaft 123 on the base 121, each swing rod 122 is fixed on the shaft 123. The operating rod 11 is connected to one of the swing rods 122. When the operating rod 11 moves, it drives one of the swing rods 122 and the shaft 123 to rotate synchronously, and the shaft 123 drives the remaining swing rods 122 to rotate, thereby realizing the three-phase synchronous opening and closing action, which helps to connect or disconnect the circuit at the same time, protect the voltage transformer, and avoid current misalignment or voltage imbalance.
[0049] In this embodiment, both the swing rod 122 and the rotating shaft 123 are made of insulating material; two or three conductive rods 13 are arranged side by side at intervals, and three swing rods 122 are arranged side by side at intervals and fixed to the rotating shaft 123.
[0050] See Figures 3 to 6 Furthermore, the three-position switch is also equipped with a pressing plate 15 and an arrival indicator 21. The pressing plate 15 is fixed to one end of the operating rod 11 located outside the cabinet 40. The arrival indicator 21 is fixed inside the housing 18 and at least partially exposed outside the housing 18. The movement of the operating rod 11 drives the pressing plate 15 to move, so that the pressing plate 15 selectively approaches and presses against the arrival indicator 21 to trigger it.
[0051] By fixing the position indicator 21 inside the housing 18, and fixing the pressure plate 15 at the end of the operating rod 11 outside the cabinet 40, when the operating rod 11 moves, it drives the pressure plate 15 to move. The pressure plate 15 can move closer to or further away from the position indicator 21. When the pressure plate 15 moves closer to the position indicator 21, the pressure plate 15 presses against and triggers the position indicator 21. The position indicator 21 is at least partially exposed outside the housing 18. By observing the indication of the exposed part of the position indicator 21, the operator can determine whether the three-position switch has been activated, which can further improve the accuracy of the operation.
[0052] In this embodiment, the outer casing 18 is provided with a display slot 182, and the indicating structure of the position indicator 21 is slidably disposed in the display slot 182 and exposed outside the outer casing 18. The outer casing 18 is provided with an indicator mark 183, which is located on one side of the display slot 182. The indicator mark 183 includes "closed" and "open" engraved marks. When the circuit is closed, the conductive rod 13 is connected to the busbar 41, and the indicating structure of the position indicator 21 moves to the corresponding position of the "closed" engraved mark. When the circuit is opened, the conductive rod 13 is connected to the grounding busbar 42, and the indicating structure of the position indicator 21 moves to the corresponding position of the "open" engraved mark.
[0053] Furthermore, the three-position switch also includes a micro switch 22, which is fixed inside the housing 18. The micro switch 22 is spaced apart from the position indicator 21 so that the pressure plate 15 can synchronously press and trigger the position indicator 21 and the micro switch 22. By adding the micro switch 22 on the basis of the position indicator 21, the micro switch 22 and the position indicator 21 provide dual feedback. The micro switch 22 can convert mechanical displacement into an electrical signal, thereby feeding back the position information of the conductive rod 13 and assisting in verifying whether the conductive rod 13 has moved into place.
[0054] It is understandable that the specific structure and working principle of the micro switch 22 and the position indicator 21 can be referred to the existing technology, and will not be repeated here.
[0055] See Figures 7 to 10 Optionally, the three-position switch also includes a fixed bracket 19, which is disposed within the housing 18. The actuating rod 16 passes through the fixed bracket 19 and is rotatably connected to it. By providing the fixed bracket 19 within the housing 18 and rotatably connecting the actuating rod 16 to it, the fixed bracket 19 can stably support the actuating rod 16, thereby cooperating with the operating lever 11 to accurately limit the movement direction of the actuating rod 16 and prevent incomplete operation due to misalignment of the actuating rod 16. In this embodiment, the housing 18 can be fixed to the cabinet 40 with bolts, and the fixed bracket 19 can also be fixed within the housing 18 with bolts.
[0056] Optionally, the housing 18 is provided with an operating port 181, through which the operating handle 17 passes and is connected to the second end of the actuating rod 16. Since the fixed bracket 19 is disposed inside the housing 18, and the actuating rod 16 passes through the fixed bracket 19, with the second end of the actuating rod 16 located between the fixed bracket 19 and the housing 18, by providing the operating port 181 on the housing 18, and by passing the operating handle 17 through the operating port 181 and connecting it to the second end of the actuating rod 16, the connection position of the operating handle 17 and the actuating rod 16 is located inside the housing 18, and the housing 18 can protect the connection position of the operating handle 17 and the actuating rod 16.
[0057] In this embodiment, the fixed bracket 19 has a Z-shaped cross-section, and both ends of the fixed bracket 19 are fixed to the outer shell 18. The actuating rod 16 passes through the middle of the fixed bracket 19.
[0058] Optionally, the operating handle 17 and the actuating lever 16 are detachably connected. When operation is required, the operating handle 17 is passed through the operating port 181 and connected to the actuating lever 16. After operation, the operating handle 17 is pulled out of the operating port 181, which can effectively prevent accidental operation.
[0059] In this embodiment, the cross-section of the second end of the actuating lever 16 is non-circular (e.g., polygonal), and the operating handle 17 is provided with a slot that matches the shape of the second end of the actuating lever 16. The actuating lever 16 is inserted into the slot. When the operating handle 17 is rotated, it can drive the actuating lever 16 to rotate synchronously.
[0060] Normally, when the conductive rod 13 of the three-position switch is not connected to the grounding busbar 42, if the operator uses the operating handle 17 to operate it, it constitutes accidental operation while the circuit is live, posing a very high safety threat to the operator. In existing technology, a limit structure is usually designed to limit the PT spacer to prevent accidental operation, but the limit structure requires many parts and is complex. Therefore, to ensure operational safety, the three-position switch also includes a control component, a transmission component 31, and a blocking component 32. The blocking component 32 is slidably disposed between the housing 18 and the fixed bracket 19, and is connected to the control component through the transmission component 31. The control component drives the transmission component 31 to move the blocking component 32, so that the blocking component 32 selectively closes or opens the operating port 181. When the operating port 181 is open, the operating handle 17 can pass through the operating port 181 and connect to the actuating rod 16. By setting up a control component, a transmission component 31, and a blocking component 32, the control component drives the transmission component 31, and the transmission component 31 drives the blocking component 32 to move. After the operation is completed or when operation is prohibited, the blocking component 32 blocks and closes the operation port 181, which can reduce the use of parts, effectively solve the problem of misoperation, and ensure operational safety.
[0061] It is understood that the specific structure of the control component can be designed with reference to existing technology, or an interlocking control component can be designed according to the working position of the conductive rod 13, so that when the conductive rod 13 is not connected to the grounding bar 42, the interlocking control shield 32 can close the operation port 181; the specific structure of the transmission component 31 can also be designed with reference to existing technology, and may include a rope, or may be further equipped with a spring or other structure.
[0062] To restrict the movement direction of the blocking member 32, one of the blocking member 32 and the outer shell 18 is provided with a guide hole 3221, and the other is provided with a protrusion 184, which slides through the guide hole 3221. By providing matching protrusions 184 and guide holes 3221 on the outer shell 18 and the blocking member 32, the movement direction of the blocking member 32 is restricted. In this embodiment, two guide holes 3221 are arranged side by side at intervals, and the protrusions 184 are arranged one-to-one with the guide holes 3221. By providing two guide holes 3221 and two protrusions 184, the stability of the movement of the blocking member 32 is ensured. In other embodiments, a connector can be provided instead of the protrusion 184. The connector passes through the guide holes 3221 of the fixing bracket 19 and the blocking member 32 in sequence, and is threadedly connected to the outer shell 18. This can both fix the fixing bracket 19 to the outer shell 18 and restrict the movement direction of the blocking member 32 by using the sliding engagement of the connector and the guide holes 3221.
[0063] See Figure 11 and Figure 12 In this embodiment, the shielding member 32 is an integral structure; the shielding member 32 includes a connecting plate 321 and a shielding plate 322 connected to the connecting plate 321, the connecting plate 321 is perpendicular to the plane of the shielding plate 322; the shielding plate 322 is a U-shaped plate, and a guide hole 3221 is provided on each of the two sides of the U-shaped plate, and the middle part of the U-shaped plate is used to shield the operation port 181.
[0064] The following is a detailed description of the operation of the three-position switch (taking the horizontal movement of the operating lever 11 as an example):
[0065] See Figure 2 , Figure 4 and Figure 6 When the circuit breaker is tripped, rotating the operating handle 17 causes the actuating rod 16 to rotate. The rotation of the actuating rod 16 causes the operating rod 11 to move from left to right, causing the swing rod 122 to rotate counterclockwise by a certain angle. The swing rod 122 pulls the conductive rod 13 to move to the left. The first end of the conductive rod 13 gradually moves away from the busbar 41 until the second end of the conductive rod 13 contacts and connects with the grounding busbar 42 through the pin 14, thus achieving tripping. At this time, the pressure plate 15 fixed at the end of the operating rod 11 separates from the position indicator 21 and the micro switch 22. The indicating structure of the position indicator 21 moves to the corresponding position of the "tripped" marking.
[0066] See Figure 1 , Figure 3 and Figure 5When closing the circuit, rotating the operating handle 17 drives the actuating rod 16 to rotate. The rotation of the actuating rod 16 drives the operating rod 11 to move from right to left, causing the swing rod 122 to rotate clockwise by a certain angle. The swing rod 122 pushes the conductive rod 13 to move to the right. The second end of the conductive rod 13 gradually moves away from the grounding bar 42 until the first end of the conductive rod 13 contacts and connects with the bus bar 41 through the pin 14, thus closing the circuit. At this time, the pressure plate 15 fixed at the end of the operating rod 11 simultaneously presses and triggers the position indicator 21 and the micro switch 22. The indicating structure of the position indicator 21 moves to the corresponding position of the "closed" marking.
[0067] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A three-position switch, used to be installed on the cabinet (40) of a switchgear, wherein the cabinet (40) is provided with a busbar (41) and a grounding busbar (42), the three-position switch including an operating rod (11), a conductive rod (13) and a transmission assembly (12) connecting the operating rod (11) and the conductive rod (13), the operating rod (11) slidingly passing through the cabinet (40), the conductive rod (13) slidingly disposed in the inner cone (43) of a voltage transformer located in the cabinet (40), the movement of the operating rod (11) driving the conductive rod (13) to move through the transmission assembly (12) so that the conductive rod (13) communicates with the busbar (41) or the grounding busbar (42), characterized in that, The three-position switch also includes: The enclosure (18), the actuator (16), and the operating handle (17) are provided. The enclosure (18) is used to fix the enclosure (40). The actuator (16) is rotatably connected to the enclosure (18). The first end of the actuator (16) is threadedly connected to the operating rod (11). The second end of the actuator (16) is drivenly connected to the operating handle (17). The rotation of the operating handle (17) drives the actuator (16) to rotate. The rotation of the actuator (16) drives the operating rod (11) to move.
2. The three-position switch according to claim 1, characterized in that, The outer casing (18) is located outside the cabinet (40), and the connection between the actuating lever (16) and the operating lever (11) is located inside the outer casing (18).
3. The three-position switch according to claim 2, characterized in that, It also includes a pressing plate (15) and a positioning indicator (21). The pressing plate (15) is fixed to one end of the operating rod (11) located outside the cabinet (40). The positioning indicator (21) is fixed inside the outer shell (18) and at least partially exposed outside the outer shell (18). The movement of the operating rod (11) drives the pressing plate (15) to move, so that the pressing plate (15) selectively approaches and presses against the positioning indicator (21).
4. The three-position switch according to claim 3, characterized in that, It also includes a micro switch (22), which is fixed inside the housing (18). The micro switch (22) and the position indicator (21) are spaced apart so that the pressure plate (15) can synchronously press and trigger the position indicator (21) and the micro switch (22).
5. The three-position switch according to claim 1, characterized in that, It also includes a fixed bracket (19), which is fixed inside the outer shell (18), and the actuating rod (16) passes through the fixed bracket (19) and is rotatably connected to the fixed bracket (19).
6. The three-position switch according to claim 5, characterized in that, The outer casing (18) is provided with an operation port (181), and the operation handle (17) passes through the operation port (181) and is connected to the second end of the action rod (16).
7. The three-position switch according to claim 6, characterized in that, The operating handle (17) is detachably connected to the actuating rod (16). The three-position switch also includes a control component, a transmission component (31), and a shielding component (32). The shielding component (32) is slidably disposed between the housing (18) and the fixed bracket (19). The shielding component (32) is connected to the control component through the transmission component (31). The control component drives the transmission component (31) to move the blocking component (32), so that the blocking component (32) selectively closes or opens the operation port (181). When the operation port (181) is open, the operation handle (17) can pass through the operation port (181) and connect with the action rod (16).
8. The three-position switch according to claim 7, characterized in that, One of the shielding member (32) and the outer shell (18) is provided with a guide hole (3221), and the other is provided with a protrusion (184), the protrusion (184) being slidably inserted through the guide hole (3221).
9. The three-position switch according to claim 8, characterized in that, At least two guide holes (3221) are arranged side by side at intervals, and the protrusions (184) are arranged in a one-to-one correspondence with the guide holes (3221).
10. A switch cabinet, characterized in that, It includes a cabinet (40), a busbar (41), a grounding busbar (42), a voltage transformer inner cone (43), and a three-position switch as described in any one of claims 1-9.