High-voltage plastic shell isolating switch

Abstract

The utility model relates to a high-voltage plastic shell isolation switch. The high-voltage plastic shell isolation switch comprises a contact assembly and an arc extinguishing assembly. The contact assembly comprises a fixed contact and a moving contact, the fixed contact is fixedly arranged, the moving contact can be movably arranged relative to the fixed contact, and the moving contact and the fixed contact are electrically connected when being in contact; the arc extinguishing assembly comprises an arc extinguishing shell and gas generating parts, an arc extinguishing space is arranged in the arc extinguishing shell, the moving path of the moving contact is located in the arc extinguishing space, the two gas generating parts are located in the arc extinguishing space and arranged at intervals, the static contact and the moving contact are located between the two gas generating parts, and the spacing distance between the two gas generating parts is 8-12 mm. According to the scheme, when the moving contact and the static contact are disconnected, the exhaust speed is increased, airflow is equally divided, arc extinguishing is efficient, and then zero flashover is achieved.

Description

Technical Field

[0001] This application relates to the field of disconnecting switch technology, and in particular to high-voltage molded case disconnecting switches. Background Technology

[0002] With the booming development of new energy sources, DC power systems are being widely applied in numerous scenarios, such as photovoltaic power plants and energy storage facilities. As two core pillars of future new power systems, photovoltaic and energy storage systems are experiencing explosive growth, significantly expanding the boundaries of the low-voltage electrical appliance market. In this process, DC circuit breakers and molded housing disconnect switches, as key supporting equipment ensuring the safe and stable operation of the system, play a crucial role. They can promptly disconnect faulty circuits, ensuring the reliability and safety of the entire power system and safeguarding the stable operation of photovoltaic and energy storage systems.

[0003] Currently, the design and manufacture of most DC circuit breakers and disconnectors in the industry are based on traditional AC switches, derived from them using multi-pole series connections. This design approach draws on mature AC switch technology to some extent, attempting to meet the disconnection requirements of DC circuits under different polarities and voltage levels by connecting multiple switching units in series.

[0004] However, the high energy density and challenging DC interruption characteristics of photovoltaic-energy storage systems pose significant risks to existing DC circuit breakers and disconnectors based on multi-pole series connections of traditional AC switches, failing to fully meet the industry's development needs. On one hand, traditional designs often struggle to extinguish high-voltage DC short-circuit faults quickly and effectively, leading to prolonged arc burning and potentially causing equipment damage or even fires. On the other hand, the high-density mixed installation of components complicates the internal structure of the product, worsening heat dissipation and reducing reliability and stability while increasing size and cost, making it difficult to adapt to the future development trend of compact and high-performance photovoltaic-energy storage systems. Utility Model Content

[0005] Therefore, it is necessary to provide a high-voltage molded case disconnect switch to address the problems of low applicable voltage, low safety, and large product size of existing disconnect switches.

[0006] A high-voltage molded case disconnect switch includes a contact assembly and an arc-extinguishing assembly. The contact assembly includes a stationary contact and a moving contact. The stationary contact is fixedly disposed, while the moving contact is movably disposed relative to the stationary contact, and the moving contact and the stationary contact are electrically connected when in contact. The arc-extinguishing assembly includes an arc-extinguishing housing and gas-generating components. The arc-extinguishing housing has an arc-extinguishing space inside, and the moving contact's movement path is within the arc-extinguishing space. Two gas-generating components are located within the arc-extinguishing space and spaced apart. Both the stationary contact and the moving contact are located between the two gas-generating components, with a spacing of 8 mm to 12 mm between them.

[0007] In one embodiment, the arc extinguishing assembly further includes an arc extinguishing grid group, which is connected to the gas generating element and at least partially located between the two gas generating elements. The arc extinguishing grid group includes a plurality of arc extinguishing grids, with adjacent arc extinguishing grids spaced apart in a distribution direction that is perpendicular to the spacing direction between the two gas generating elements.

[0008] In one embodiment, the arc-extinguishing space includes a first cavity and a second cavity connected together. The first cavity is located above the second cavity, and the length of the second cavity in the distribution direction of the arc-extinguishing grid is greater than the length of the first cavity. The moving path of the moving contact and the stationary contact are both located in the first cavity.

[0009] In one embodiment, the arc-extinguishing housing has an air outlet that connects the arc-extinguishing space to the outside.

[0010] In one embodiment, there are two air outlets, which are located on opposite sides of the distribution direction of the arc-extinguishing grid, and the projections of the two air outlets along the distribution direction at least partially overlap.

[0011] In one embodiment, the arc extinguishing assembly further includes a de-detached mesh that covers the air outlet.

[0012] In one embodiment, the second cavity covers the arc-extinguishing housing in the distribution direction of the arc-extinguishing grid.

[0013] In one embodiment, the arc-extinguishing housing includes a first housing and a second housing that are interlocked, the installation direction of the first housing and the second housing being in the same direction as the spacing direction of the two gas-generating components, and at least one of the first housing and the second housing having a recess along the edge of the arc-extinguishing space and facing the other of the first housing and the second housing, so that the other part of the first housing and the second housing can be inserted into the recess.

[0014] In one embodiment, the high-voltage molded case disconnect switch further includes an operating mechanism rotatably configured to move the moving contact relative to the stationary contact.

[0015] In one embodiment, the number of contact assemblies and the arc-extinguishing assemblies are equal and arranged in a one-to-one correspondence. The high-voltage molded case disconnect switch also includes a transmission mechanism, one end of which is connected to the operating mechanism and the other end of which is connected to each of the contact assemblies, so that all the contact assemblies are controlled by the operating mechanism.

[0016] The high-voltage molded case disconnector provided in the above solution incorporates an arc-extinguishing assembly with a spacing of 8 to 12 mm between the two gas-generating components. This reduces the space between the two components, thereby minimizing the volume restriction on gas flow and diffusion in the arc-generating area. This allows gas to accumulate rapidly in a localized area, creating higher pressure between the components and increasing the gas pressure within the arc-extinguishing space. This increases the pressure difference between the moving and stationary contacts and the external environment, allowing the arc to pass through quickly. The high-pressure gas helps compress the arc, reducing its diameter and accelerating its cooling and extinguishing. This ensures rapid arc extinguishing when the circuit breaker disconnects the circuit, preventing damage to equipment and personnel. It improves arc-extinguishing capability, solves the critical load current problem, and accelerates exhaust speed and evenly distributes airflow during moving and stationary contact disconnection, achieving efficient arc extinguishing and ultimately zero arc flash. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a high-voltage molded case disconnect switch in one embodiment of this application.

[0018] Figure 2 for Figure 1 A cross-sectional schematic diagram of a medium-to-high voltage molded case disconnector.

[0019] Figure 3 for Figure 1 Exploded view of the arc extinguishing component.

[0020] Figure 4 for Figure 1 A cross-sectional view of a medium-to-high voltage molded case disconnector from another perspective.

[0021] Explanation of reference numerals in the attached figures:

[0022] 100. Disconnecting switch; 110. Contact assembly; 111. Stationary contact; 112. Moving contact; 120. Arc extinguishing assembly; 121. Arc extinguishing housing; 1211. First housing; 1212. Second housing; 1213. Groove; 1214. Raised strip; 122. Arc extinguishing space; 1221. First cavity; 1222. Second cavity; 123. Gas generating component; 124. Arc extinguishing grid assembly; 1241. Arc extinguishing grid; 125. Gas outlet; 126. Anti-freezing mesh; 127. Partition plate; 130. Operating mechanism; 131. Handle; 140. Transmission mechanism. Detailed Implementation

[0023] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0024] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application.

[0025] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0029] See Figure 1 , Figure 1 A schematic diagram of a high-voltage molded case disconnect switch 100 according to an embodiment of this application is shown. The high-voltage molded case disconnect switch 100 provided in an embodiment of this application is used to cut off the circuit in the event of a short circuit and protect the circuit. The high-voltage molded case disconnect switch 100 includes a contact assembly 110 and an arc extinguishing assembly 120.

[0030] Combination Figure 2 As shown, Figure 2 A cross-sectional schematic diagram of a high-voltage molded case disconnector 100 according to an embodiment of this application is shown. The contact assembly 110 includes a stationary contact 111 and a moving contact 112. The stationary contact 111 is fixedly disposed, and the moving contact 112 is movably disposed relative to the stationary contact 111. When the moving contact 112 and the stationary contact 111 are in contact, they are electrically connected. When the stationary contact 111 and the moving contact 112 are in contact, a conductive circuit is formed. When the stationary contact 111 and the moving contact 112 are disconnected, the circuit is broken.

[0031] In this embodiment, the moving contact 112 can stand independently. That is, when the high-voltage molded case disconnector 100 encounters a short-circuit current, the moving contact 112 is repelled by the electric repulsive force and stands upright at the dead point to break the circuit, thereby improving the breaking capacity.

[0032] The arc-extinguishing component 120 is used to prevent the splashing of conductive particles generated when the stationary contact 111 and the moving contact 112 split during connection and disconnection, which could reduce dielectric performance or even cause short-circuit breakdown, thus greatly improving the dielectric performance of the product. Combined with... Figure 3 and Figure 4 As shown, the arc-extinguishing assembly 120 includes an arc-extinguishing housing 121 and gas-generating components 123. An arc-extinguishing space 122 is provided inside the arc-extinguishing housing 121. The moving contact 112's movement path is within the arc-extinguishing space 122. Two gas-generating components 123 are located within the arc-extinguishing space 122 and spaced apart. The stationary contact 111 and the moving contact 112 are both located between the two gas-generating components 123. When the moving contact 112 and the stationary contact 111 break apart and an arc is generated, the high-temperature arc will cause the gas-generating components 123 to rapidly vaporize, generating a large amount of gas. Figure 4 As shown, the distance L between the two gas generating components 123 is 8mm to 12mm. By reducing the space between the two gas generating components 123, the volume restriction of the arc-generating area is reduced, limiting the flow and diffusion of gas. This allows the gas to accumulate rapidly in a local area, thereby creating a higher pressure between the gas generating components 123. This increases the gas pressure within the arc-extinguishing space 122, raising the gas pressure near the moving contact 112 and the stationary contact 111 and generating a higher pressure difference with the outside. This allows the arc to pass through quickly. The high-pressure gas helps to compress the arc, reducing its diameter and accelerating its cooling and extinguishing. This ensures that the arc is extinguished quickly when the circuit breaker disconnects the circuit, preventing damage to equipment and personnel from the arc. This improves the arc-extinguishing capability and solves the critical load current problem.

[0033] In this embodiment, the interval L between the two gas generating components 123 is 10mm, which was determined through a large number of arc simulations and experiments. It has a higher arc extinguishing capability and takes into account the difficulty of production and installation.

[0034] In this embodiment, the high-voltage molded case disconnect switch 100 also includes an outer molded case made of insulating resin material. The contact assembly 110 and the arc extinguishing assembly 120 are both located inside the molded case to provide better insulation protection for the disconnect switch 100, increase the insulation performance of the product, avoid leakage, simplify assembly, enable automated production, and improve production efficiency and consistency.

[0035] like Figures 2 to 4As shown, in one embodiment, the arc-extinguishing assembly 120 further includes an arc-extinguishing grid assembly 124. The arc-extinguishing grid assembly 124 is connected to the gas-generating element 123 and is at least partially located between the two gas-generating elements 123. The arc-extinguishing grid assembly 124 includes a plurality of arc-extinguishing grids 1241, with adjacent arc-extinguishing grids 1241 spaced apart in a distribution direction perpendicular to the spacing direction of the two gas-generating elements 123. When an electric arc enters the arc-extinguishing grid assembly 124, it is divided into multiple short arcs connected in series. This increases the voltage drop of each short arc, thereby increasing the total voltage drop of the arc. When the arc voltage is greater than the power supply voltage, the arc will extinguish due to insufficient energy.

[0036] like Figure 2 and Figure 3 As shown, in one embodiment, the arc-extinguishing space 122 includes a first cavity 1221 and a second cavity 1222 connected to each other. The first cavity 1221 is located above the second cavity 1222, and the length of the second cavity 1222 in the distribution direction of the arc-extinguishing grid 1241 is greater than the length of the first cavity 1221. The moving path of the moving contact 112 and the stationary contact 111 are both located in the first cavity 1221. The portion of the arc-extinguishing grid group 124 between the two gas generating elements 123 is located in the second cavity 1222 to accommodate more arc-extinguishing grids 1241, thereby ensuring high connection and disconnection capabilities.

[0037] like Figure 2 As shown, in one embodiment, the arc-extinguishing housing 121 has an air outlet 125, which connects the arc-extinguishing space 122 and the outside, so that the airflow in the arc-extinguishing space 122 can flow to the outside of the high-voltage plastic case disconnect switch 100, thereby realizing heat dissipation of the high-voltage plastic case disconnect switch 100.

[0038] like Figure 2 As shown, in one embodiment, there are two air outlets 125. The two air outlets 125 are located on both sides of the distribution direction of the arc-extinguishing grid plate 1241, and the projections of the two air outlets 125 along the distribution direction at least partially overlap, forming a double air outlet structure that runs vertically through the grid. When the moving contact 112 and the stationary contact 111 break, the exhaust speed is accelerated, the airflow is evenly distributed, and the arc is extinguished efficiently. When the moving contact 112 and the stationary contact 111 are in contact, gas convection is used to reduce the overall operating temperature rise.

[0039] like Figures 1 to 3As shown, in one embodiment, the arc extinguishing assembly 120 further includes an anti-ionization mesh 126, which covers the gas outlet 125. The anti-ionization mesh 126 can adsorb charged particles, such as electrons and ions, generated during the arc extinguishing process, thereby reducing the free charge in the arc column, reducing the conductivity of the arc, accelerating the arc extinguishing process, and preventing high-temperature free gas from being emitted to the outside, thus preventing the arc from flying out of the arc extinguishing space 122 and causing safety accidents such as phase-to-phase breakdown, thereby improving the safety and reliability of the arc extinguishing assembly 120.

[0040] like Figure 2 As shown, in one embodiment, the second cavity 1222 covers the arc-extinguishing housing 121 in the distribution direction of the arc-extinguishing grids 1241. It occupies a larger volume in the high-voltage molded case disconnector 100, allowing it to accommodate more arc-extinguishing grids 1241, thereby ensuring high making and breaking capacity. Exemplarily, in this embodiment, there are 44 arc-extinguishing grids 1241.

[0041] like Figure 1 , Figure 3 and Figure 4 As shown, in one embodiment, the arc-extinguishing housing 121 includes a first housing 1211 and a second housing 1212 that interlock. The mounting direction of the first housing 1211 and the second housing 1212 is the same as the spacing direction of the two gas-generating components 123. At least one of the first housing 1211 and the second housing 1212 is provided with a groove 1213 recessed along the edge of the arc-extinguishing space 122 and toward the other of the first housing 1211 and the second housing 1212, so as to allow the first housing 1211 and the second housing 1212 to... Another part is inserted into the groove 1213. It is understood that in this embodiment, both the first housing 1211 and the second housing 1212 are provided with grooves 1213. Correspondingly, both the first housing 1211 and the second housing 1212 are also provided with corresponding protrusions 1214 for insertion into the grooves 1213. This ensures excellent airtightness at the connection between the first housing 1211 and the second housing 1212, preventing pressure leakage near the moving contact 112 and the stationary contact 111, thereby generating a larger internal and external pressure difference and improving arc extinguishing capability. On the other hand, this connection method of the first housing 1211 and the second housing 1212 can also reduce the size of the second cavity 1222 to a certain extent, thereby achieving a further pressurization effect within the arc extinguishing space 122, further accelerating the cooling and extinguishing of the arc.

[0042] like Figure 3 As shown, in this embodiment, the arc extinguishing assembly 120 also includes a partition 127, which is located between the gas generating component 123 and the arc extinguishing housing 121. The partition 127 is used to prevent the arc from spreading outside the arc extinguishing space 122, thereby avoiding harm to surrounding equipment and personnel. It also serves to help fix the arc extinguishing grid plate 1241.

[0043] like Figure 1 and Figure 2 As shown, in one embodiment, the high-voltage molded case disconnector 100 further includes an operating mechanism 130. The operating mechanism 130 is rotatably configured to move the moving contact 112 relative to the stationary contact 111. The operating mechanism 130 drives the transmission mechanism 140 to achieve rapid and reliable disconnection and closing of the moving contact 112 and the stationary contact 111, thereby controlling the on / off state of the circuit. Figure 1 and Figure 2 As shown, the operating mechanism 130 includes a handle 131 for easy operation.

[0044] like Figure 1 and Figure 2 As shown, in this embodiment, the operating mechanism 130 adopts a horizontal structure, which has a shorter action time than the vertical structure, and can be controlled within about 10 milliseconds. Its contact assembly 110 has higher connection and disconnection capabilities and a longer service life.

[0045] like Figure 1 As shown, in one embodiment, the number of contact components 110 and arc extinguishing components 120 are equal and arranged in a one-to-one correspondence. In this embodiment, the number of contact components 110 and arc extinguishing components 120 is two each. This is only an example and not a limitation. In other embodiments, the number of contact components 110 and arc extinguishing components 120 may be one or more than two.

[0046] like Figures 1 to 3 As shown, the high-voltage molded case disconnect switch 100 also includes a transmission mechanism 140. One end of the transmission mechanism 140 is connected to the operating mechanism 130, and the other end is connected to each contact assembly 110, so that all contact assemblies 110 are controlled by the operating mechanism 130, thereby improving reliability and facilitating operation.

[0047] Combination Figure 1 and Figure 2 As shown, in this embodiment, the operating mechanism 130 of the high-voltage molded case disconnector 100 is located above the contact assembly 110 and the arc-extinguishing assembly 120. Its vertical layout achieves a small size, high reliability, and increased mechanical lifespan. Furthermore, the different contact assemblies 110 are laterally distributed, allowing the high-voltage molded case disconnector 100 to be assembled horizontally, thus facilitating production, assembly, and maintenance, and reducing manufacturing costs.

[0048] The high-voltage molded case disconnector 100 provided in the above scheme, by setting an arc-extinguishing component 120, and the distance between the two gas-generating components 123 in the arc-extinguishing component 120 is 8 to 12 mm, reduces the space between the two gas-generating components 123, thereby reducing the volume restriction of gas flow and diffusion in the arc-producing area, allowing gas to accumulate rapidly in the local area, thus forming a higher pressure between the gas-generating components 123, achieving the purpose of increasing the gas pressure in the arc-extinguishing space 122, increasing the gas pressure near the moving contact 112 and the stationary contact 111 and generating a higher gas pressure difference with the outside, allowing the arc to pass through quickly. The high-pressure gas helps to compress the arc, reducing its diameter, accelerating the cooling and extinguishing of the arc, so as to quickly extinguish the arc when the circuit breaker disconnects the circuit, preventing the arc from causing damage to equipment and personnel, improving the arc-extinguishing capability, solving the critical load current problem, realizing that when the moving contact 112 and the stationary contact 111 are disconnected, the exhaust speed is accelerated, the airflow is evenly distributed, and the arc is extinguished efficiently, thereby achieving zero arc flash.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A high-voltage molded case disconnect switch, characterized in that, The high-voltage molded case disconnect switch includes: A contact assembly includes a stationary contact and a moving contact, wherein the stationary contact is fixedly disposed, and the moving contact is movably disposed relative to the stationary contact, and the moving contact and the stationary contact are electrically connected when in contact; and An arc-extinguishing assembly includes an arc-extinguishing housing and gas-generating components. The arc-extinguishing housing has an arc-extinguishing space inside. The moving path of the moving contact is within the arc-extinguishing space. Two gas-generating components are located within the arc-extinguishing space and are spaced apart. The stationary contact and the moving contact are both located between the two gas-generating components. The distance between the two gas-generating components is 8mm to 12mm.

2. The high-voltage molded case disconnector according to claim 1, characterized in that, The arc extinguishing assembly further includes an arc extinguishing grid plate group, which is connected to the gas generating element and is at least partially located between the two gas generating elements. The arc extinguishing grid plate group includes multiple arc extinguishing grid plates, with adjacent arc extinguishing grid plates spaced apart in a distribution direction, and the distribution direction is perpendicular to the spacing direction between the two gas generating elements.

3. The high-voltage molded case disconnector according to claim 2, characterized in that, The arc-extinguishing space includes a first cavity and a second cavity connected together. The first cavity is located above the second cavity, and the length of the second cavity in the distribution direction of the arc-extinguishing grid is greater than the length of the first cavity. The moving path of the moving contact and the stationary contact are both located in the first cavity.

4. The high-voltage molded case disconnector according to claim 3, characterized in that, The arc-extinguishing shell has an air outlet, which connects the arc-extinguishing space to the outside.

5. The high-voltage molded case disconnect switch according to claim 4, characterized in that, The number of air outlets is two, and the two air outlets are located on both sides of the distribution direction of the arc-extinguishing grid, and the projections of the two air outlets along the distribution direction at least partially overlap.

6. The high-voltage molded case disconnector according to claim 4, characterized in that, The arc extinguishing assembly also includes a de-detached mesh, which covers the air outlet.

7. The high-voltage molded case disconnector according to claim 3, characterized in that, The second cavity covers the arc-extinguishing shell in the distribution direction of the arc-extinguishing grid.

8. The high-voltage molded case disconnector according to claim 4, characterized in that, The arc-extinguishing housing includes a first housing and a second housing that are interlocked. The installation direction of the first housing and the second housing is the same as the spacing direction of the two gas-generating components. At least one of the first housing and the second housing is provided with a groove along the edge of the arc-extinguishing space and facing the other of the first housing and the second housing, so that the other part of the first housing and the second housing can be inserted into the groove.

9. The high-voltage molded case disconnector according to claim 1, characterized in that, The high-voltage molded case disconnect switch also includes an operating mechanism, which is rotatably configured to move the moving contact relative to the stationary contact.

10. The high-voltage molded case disconnector according to claim 9, characterized in that, The number of contact assemblies and the number of arc extinguishing assemblies are equal and they are arranged in a one-to-one correspondence. The high-voltage molded case disconnect switch also includes a transmission mechanism. One end of the transmission mechanism is connected to the operating mechanism, and the other end is connected to each of the contact assemblies, so that all the contact assemblies are controlled by the operating mechanism.

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