Primary contact for movable switch cabinet and movable switch cabinet with primary contact

Abstract

The utility model relates to a primary contact for a movable switch cabinet and the movable switch cabinet with the primary contact. The primary contact comprises a supporting shell which is arranged on the transverse side of the power distribution bus in the cabinet body, the supporting shell comprises a bottom plate, a pair of transverse side plates and a pair of longitudinal side plates, a mounting space is defined by the pair of transverse side plates and the pair of longitudinal side plates, and each transverse side plate is provided with a connecting opening penetrating in the transverse direction; the limiting plate extends in the mounting space in the longitudinal direction and is provided with a limiting opening penetrating in the transverse direction, and the limiting opening is aligned with the center of the connecting opening of each transverse side plate; the contact part is transversely placed in the mounting space and penetrates through the limiting opening of the limiting plate, and the end, close to the power distribution bus, of the contact part is connected to the power distribution bus through the adjacent connecting opening; wherein the longitudinal size of a section, opposite to the limiting plate in the longitudinal direction, of the contact component is smaller than the longitudinal size of the limiting opening, and the vertical size of the section is smaller than the vertical size of the mounting space.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a primary contact for a withdrawable switchgear and a withdrawable switchgear having the same. Background Technology

[0002] Removable switchgear, such as drawer-type switchgear or handcart-type switchgear, is widely used in power systems due to its advantages such as convenient maintenance and reliable power supply. It typically includes a cabinet and removable components that are movable relative to the cabinet. When the removable components are moved to the working position relative to the cabinet, the connection terminals on the removable components can be electrically connected to the distribution busbar fixed in the cabinet to conduct the main circuit and ensure the safe and reliable operation of the switchgear.

[0003] However, in the prior art, the primary contact arranged on the removable part and electrically connected to the connection terminal is usually used to connect to the distribution bus. When the removable part moves to the distribution bus, it is difficult to avoid the situation that the primary contact and the distribution bus are not completely aligned. This may lead to defects such as loose and unreliable contact between the distribution bus and the primary contact, which in turn leads to increased contact resistance, excessive temperature rise, or even burnout of the primary contact.

[0004] Therefore, there is a demand in this field for primary contacts with high reliability. Utility Model Content

[0005] The present invention aims to provide a single contact that can at least solve some of the problems mentioned above.

[0006] This utility model also aims to provide a removable switch cabinet that applies the above-mentioned improved primary contact.

[0007] According to one aspect of the present invention, a primary contact for a withdrawable switchgear is provided. The withdrawable switchgear includes a cabinet and a removable component that can move laterally relative to the cabinet. A power distribution busbar is provided inside the cabinet, and the removable component has connection terminals. The primary contact includes: a support housing arranged in the cabinet on the lateral side of the power distribution busbar; the support housing includes a base plate, a pair of lateral side plates located on both lateral sides of the base plate, and a pair of longitudinal side plates located on both longitudinal sides of the base plate; the pair of lateral side plates and the pair of longitudinal side plates enclose an installation space, and each lateral side plate has a transversely penetrating connection opening; and a limiting plate extending longitudinally within the installation space and having a transversely penetrating limiting opening. The center of the limiting opening is aligned with the center of the connection opening of each transverse side plate; the contact component is placed transversely within the mounting space and passes through the limiting opening of the limiting plate, the end of the contact component adjacent to the power distribution busbar is connected to the power distribution busbar via an adjacent connection opening; wherein, the longitudinal dimension of the portion of the contact component opposite to the limiting plate in the longitudinal direction is smaller than the longitudinal dimension of the limiting opening and the vertical dimension of the portion is smaller than the vertical dimension of the mounting space, so that when the removable component moves toward the cabinet and the connection terminal is connected to the end of the contact component adjacent to the connection terminal via an adjacent connection opening, the end of the contact component adjacent to the connection terminal is movable relative to the end of the contact component adjacent to the power distribution busbar.

[0008] Compared with the prior art, the primary contact in this invention is arranged on a relatively fixed cabinet side and connected to the power distribution bus. This avoids repeated engagement and disengagement with the power distribution bus during the opening and closing of the switchgear, thereby preventing wear on the power distribution bus. Furthermore, the contact components of the primary contact are spaced apart longitudinally and vertically relative to the limiting plate on the support housing. This allows the end of the contact component adjacent to the connecting terminal to still move relative to the end of the contact component connected to the power distribution bus after the primary contact is installed to the cabinet and connected to the power distribution bus. This provides positional compensation during the connection between the contact component and the connecting terminal, thus ensuring a reliable connection between the contact component and the connecting terminal.

[0009] Preferably, the contact component includes: a pair of contact pieces extending laterally through the limiting opening and longitudinally symmetrical about each other, the two lateral ends of the pair of contact pieces being respectively configured to clamp the power distribution bus and the connection terminal; and a clamping member that clamps at least the longitudinally opposite portions of the pair of contact pieces to the limiting opening together.

[0010] Preferably, the clamping member extends laterally beyond both ends of the limiting opening; the support housing further includes a pair of limiting protrusions arranged on both sides of the clamping member to restrict the clamping member from moving laterally relative to the support housing.

[0011] Preferably, the limiting plate includes a pair of limiting plate members extending longitudinally from the pair of longitudinal side plates to cooperate in forming the limiting opening, the pair of limiting plate members being arranged parallel to the base plate; the clamping member includes a support section placed on the base plate and a pair of clamping sections located on both longitudinal sides of the support section, the pair of clamping sections having abutment portions extending laterally and protruding toward each other, so as to allow the pair of limiting plate members to be vertically located within adjacent abutment portions.

[0012] Preferably, the surface of each contact piece facing another contact piece at the end adjacent to the distribution busbar is centrally arranged with a flat surface.

[0013] Preferably, the sections of the pair of longitudinal side plates and the pair of contact pieces adjacent to the ends of the connecting terminals are provided with a pair of snap-fit ​​structures on the sides facing away from each other for engaging with the cabinet snap-fit.

[0014] Preferably, the section of the base plate opposite to the pair of snap-fit ​​structures is provided with a vertically penetrating clearance, the clearance extending laterally inside the longitudinal direction of the pair of contact pieces and communicating with an adjacent connection opening; the support housing is designed to be elastic so that the sections of the pair of longitudinal side plates opposite to the ends of the pair of contact pieces near the connection terminals can move toward the clearance under the action of external force until the pair of snap-fit ​​structures are released from the cabinet.

[0015] Preferably, the base plate is further provided with a heat dissipation vent that runs vertically through the base plate and communicates with the clearance opening.

[0016] Preferably, each snap-fit ​​structure includes a pair of snap-fit ​​protrusions protruding from the longitudinal side plate, wherein the surface of the first snap-fit ​​protrusion adjacent to the power distribution busbar is configured as a guide slope, and the second snap-fit ​​protrusion away from the power distribution busbar extends beyond the first snap-fit ​​protrusion from the longitudinal side plate.

[0017] According to another aspect of the present invention, a removable switch cabinet is also provided, which includes a cabinet body and a removable component that can move laterally relative to the cabinet body. The cabinet body is provided with a power distribution busbar and the removable component is provided with a connection terminal. The removable switch cabinet also includes the aforementioned primary contact.

[0018] Other features and advantages of this invention will partly be apparent to those skilled in the art upon reading this application, and partly will be described below in conjunction with the accompanying drawings in the detailed description. Attached Figure Description

[0019] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings, wherein:

[0020] Figure 1 This is an exploded view of a primary contact for a withdrawable switchgear according to the present invention;

[0021] Figure 2 This is a perspective view of a primary contact for a retractable switchgear according to the present invention;

[0022] Figure 3 This is a cross-sectional view of a primary contact for a withdrawable switchgear according to the present invention;

[0023] Figure 4 This is a top view of a primary contact for a retractable switchgear according to the present invention;

[0024] Figure 5 This is a current path diagram for the primary contact of a retractable switchgear according to the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 100 - Primary contact; 10 - Support housing; 11 - Base plate; 111 - Clearance opening; 112 - Heat dissipation vent; 12 - Lateral side plate; 121 - Connection opening; 13 - Longitudinal side plate; 14 - Limiting protrusion; 15 - Snap-fit ​​structure; 151 - Snap-fit ​​protrusion; 152 - Guide slope; 20 - Limiting plate; 21 - Limiting opening; 22 - Limiting plate component; 30 - Contact component; 31 - Contact piece; 311 - Straight section; 312 - Curved section; 313 - Guide section; 314 - Flat surface; 32 - Clamping component; 321 - Support section; 322 - Clamping section; 323 - Abutment part. Detailed Implementation

[0027] The schematic scheme of the primary contact for a withdrawable switchgear disclosed in this utility model is now described in detail with reference to the accompanying drawings. Although the drawings are provided to illustrate some embodiments of this utility model, the drawings are not necessarily drawn to the dimensions of the specific embodiments, and certain features may be enlarged, removed, or partially cut to better illustrate and explain the disclosure of this utility model. Some components in the drawings may be repositioned according to actual needs without affecting the technical effect. The phrase "in the drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0028] Certain directional terms used in the description of the accompanying drawings below, such as “inner,” “outer,” “above,” “below,” and other directional terms, will be understood to have their normal meaning and refer to those directions as normally viewed in the accompanying drawings. Unless otherwise specified, the directional terms used in this specification are generally in accordance with the conventional directions understood by those skilled in the art.

[0029] The terms “first,” “first,” “second,” “second,” and similar terms used in this utility model do not indicate any order, quantity, or importance, but are used to distinguish one component from other components.

[0030] The terms "joining", "connection" and similar terms used in this utility model include both indirect connection of two components with the aid of an intermediate layer (e.g., adhesive, welding agent, etc.) or intermediate parts (e.g., connector, transition piece, etc.) and direct connection of two components without the aid of any intermediate layer (e.g., adhesive, welding agent, etc.) or intermediate parts (e.g., connector, transition piece, etc.).

[0031] Figures 1 to 5 The present invention provides a primary contact 100, which can be installed into the cabinet of a withdrawable switchgear and electrically connected to the distribution busbar on the cabinet side. When the withdrawable component of the switchgear moves laterally into position towards the cabinet, the primary contact 100 can electrically connect to the connection terminal on the withdrawable component side. This allows the main circuit to be connected via the primary contact 100 to the distribution busbar and the connection terminal, while also preventing wear on the distribution busbar. Understandably, "lateral" as used herein refers to... Figure 4 The left and right directions in the attached diagram are shown, while the "vertical" direction is... Figure 4 The vertical direction in the attached diagram, and the "vertical" direction are... Figure 4 The page orientation shown in the attached diagram is both inside and outside.

[0032] The distribution busbar can extend vertically within the cabinet and may be equipped with a busbar clamp extending horizontally, for fixing the distribution busbar to the cabinet via the busbar clamp. A primary contact 100 can be fixedly installed to the busbar clamp, thereby being fixedly arranged on the horizontal side of the distribution busbar facing the removable component and electrically connected to the distribution busbar. For example... Figure 1 and Figure 2 As shown, the primary contact 100 may include a support housing 10, a limiting plate 20, and a contact component 30.

[0033] Specifically, the support housing 10 can be generally designed as a hollow cuboid structure, which may include a base plate 11, a pair of transverse side plates 12, and a pair of longitudinal side plates 13. The transverse side plates 12 extend longitudinally and are arranged on the transverse side of the base plate 11, while the longitudinal side plates 13 extend transversely and are arranged on the longitudinal side of the base plate 11, so that the pair of transverse side plates 12 and the pair of longitudinal side plates 13 enclose the periphery of the base plate 11 to form an installation space for installing subsequent components. The transverse side plates 12 may be provided with transversely penetrating connection openings 121, so that the installation space of the support housing 10 can communicate with the outside through the connection openings 121 of the two transverse side plates 12.

[0034] The limiting plate 20 can be arranged longitudinally within the installation space and has a limiting opening 21 extending laterally. The limiting opening 21 is aligned with the center of the connecting openings 121 located on both sides of the limiting opening 21, so as to a certain extent, the power distribution bus, contact component 30, and connecting terminal are arranged coaxially. The contact component 30 can be placed laterally within the installation space and passes through the limiting opening 21 of the limiting plate 20, so that the portion of the contact component 30 opposite to the limiting plate 20 is limited by the limiting plate 20, while the portions of the contact component 30 located on both sides of the limiting plate 20 are used for electrical connection to the power distribution bus and the connecting terminal, respectively. In practical applications, the limiting plate 20 can be integrally formed with the support housing 10.

[0035] Combination Figure 3 As shown, the longitudinal dimension of the section of the contact component 30 opposite to the limiting plate 20 is smaller than the longitudinal dimension of the limiting opening 21, thereby allowing this section to move longitudinally relative to the support housing 10 within the limiting opening 21. The top side of the support housing 10, which is fixed to the cabinet via a busbar clamp, is closed by the busbar clamp or the cabinet. With the top surfaces of the longitudinal side plate 13 and the transverse side plate 12 of the support housing 10 substantially flush, the vertical dimension of the installation space of the support housing 10 is essentially equal to the dimensions of the longitudinal side plate 13 and the transverse side plate 12 of the support housing 10. The section of the contact component 30 opposite to the limiting plate 20 is also configured such that its vertical dimension is smaller than the vertical dimension of the installation space, thereby allowing this section to move vertically relative to the support housing 10 within the limiting opening 21 and even deflect.

[0036] In this manner, when the end of the contact component 30 adjacent to the power distribution bus is connected to the power distribution bus via the adjacent connection opening 121, when the removable component moves toward the cabinet and the connection terminal is connected to the end of the contact component 30 adjacent to the connection terminal via the adjacent connection opening 121, even if the connection terminal and the contact component 30 connected to the power distribution bus are slightly misaligned due to manufacturing and installation errors or deviations caused by long-term use, the end of the contact component 30 adjacent to the connection terminal can move relative to the end of the contact component 30 adjacent to the power distribution bus during the connection with the connection terminal, thereby providing a certain positional compensation to ensure reliable contact between the contact component 30 and the connection terminal.

[0037] like Figure 1 and Figure 2 As shown, the contact component 30 may include a pair of contact pieces 31 extending laterally and arranged symmetrically about each other longitudinally, and a clamping member 32, such as a snap ring, for clamping the pair of contact pieces 31. Figure 4 As shown, the contact piece 31 may include a straight section 311 extending laterally and curved sections 312 extending from both sides of the straight section 311. The straight section 311 of the contact piece 31 abuts against the straight section 311 of another contact piece 31, while the curved section 312 protrudes away from the other contact piece 31, so that the curved sections 312 of a pair of contacts 31 adjacent to the power distribution bus can be used to clamp the power distribution bus, and the curved sections 312 adjacent to the connection terminal can be used to clamp the connection terminal.

[0038] Optionally, a guide section 313 may be provided on the side of the curved segment 312 of the contact piece 31 away from the straight segment 311. The guide section 313 may also be constructed as a curved shape extending away from the guide section 313 of the other contact piece 31 and smoothly transitioning with the curved segment 312, so that the guide sections 313 on both sides of the pair of contact pieces 31 can respectively guide the power distribution bus and the connection terminal into the corresponding curved segment 312 and be clamped by the corresponding curved segment 312.

[0039] Advantageously, a portion of the surface of the contact piece 31 facing the other contact piece 31 at the end of the curved section 312 of the distribution busbar, i.e., the intersection of the guide section 313 of the contact piece 31 and the curved section 312, is designed as a flat surface 314. For example, this flat surface 314 is generally located in the middle of the curved section 312 in the vertical direction. Thus, the surface of the curved section 312 facing the other contact piece 31 may include the flat surface 314 and curved surfaces located on both sides of the flat surface 314 in the vertical direction. This not only increases the contact area between the contact piece 31 and the distribution busbar to ensure reliable connection, but also divides the contact surface of the contact piece 31, thereby avoiding possible point contact between the contact piece 31 and the distribution busbar due to unevenness in single-sided processing.

[0040] Further integration Figure 5As shown, after the main circuit of the withdrawable switchgear is turned on, the current flows from the distribution busbar through the contact piece 31 to the connection terminal along the direction of current i. A pair of contact pieces 31 are installed symmetrically about each other longitudinally. According to the right-hand rule, the magnetic fields in the middle region of the pair of contact pieces 31 cancel each other out longitudinally, while the magnetic fields on the side of each contact piece 31 facing away from the other contact piece 31 are in opposite directions, as shown by letter B in the figure. According to the left-hand rule, the direction of the Ampere force on each contact piece 31 in the magnetic field is longitudinally towards the other contact piece 31, as shown by letter F in the figure, so that the pair of contact pieces 31 can clamp the distribution busbar and connection terminal located between the pair of contact pieces 31. Especially when a short-circuit fault occurs in the withdrawable switchgear, the clamping force of the pair of contact pieces 31 used to clamp the distribution busbar and connection terminal will increase accordingly, avoiding contact repulsion between the pair of contact pieces 31, and at this time the contact resistance is small, which helps to reduce temperature rise.

[0041] like Figure 3 As shown, the clamping member 32 may include a support section 321 and a pair of clamping sections 322 located on both sides of the longitudinal direction of the support section 321. The support section 321 is placed on the base plate 11 and its longitudinal dimension exceeds the longitudinal dimension of the limiting opening 21. The clamping sections 322 are provided with abutment portions 323 that extend laterally and protrude toward the other clamping section 322, such that the pair of clamping sections 322 have a minimum longitudinal distance at the abutment portions 323 and the longitudinal distance is less than the longitudinal dimension of the limiting opening 21.

[0042] The limiting plate 20 may include a pair of limiting plates 22, which extend longitudinally from a pair of longitudinal side plates 13 to form a limiting opening 21. The limiting plates 22 may be arranged parallel to the base plate 11 so that the limiting plates 22 can easily extend into the abutment portion 323 of the clamping section 322 of the adjacent contact piece 31. That is, the limiting plates 22 are arranged longitudinally and vertically spaced from the clamping sections 322 of the adjacent contact piece 31, and the limiting plates 22 located in the abutment portion 323 of the clamping section 322 of the contact piece 31 in the vertical direction can prevent the clamping member 32 from vertically disengaging from the support housing 10 after the clamping member 32 is installed to the support housing 10.

[0043] Combination Figure 2 and Figure 4As shown, the clamping member 32 is arranged longitudinally opposite to the limiting plate 20 and extends laterally beyond both ends of the limiting plate 20. Therefore, the support housing 10 may also provide a pair of limiting protrusions 14 on both lateral sides of the clamping member 32 to laterally confine the clamping member 32 within the support housing 10. The straight section 311 of the contact piece 31 may extend laterally beyond the pair of limiting protrusions 14, so the limiting protrusions 14 may correspondingly have openings extending laterally to allow the contact piece 31 to pass through. The limiting protrusions 14 are also spaced apart from the straight section 311 of the contact piece 31, and the distance between the limiting protrusions 14 and the contact piece 31 is preferably greater than the distance between the clamping member 32 and the limiting plate 20 to allow positional compensation when the contact piece 31 is connected to the connecting terminal.

[0044] like Figure 4 As shown, the curved segment 312 of the contact piece 31 adjacent to the distribution busbar can extend from the straight segment 311 away from another curved segment 312 beyond the adjacent limiting protrusion 14, thereby preventing the contact piece 31 from moving away from the distribution busbar when it is inserted into the distribution busbar. In this case, the connection opening 121 on the transverse side plate 12 adjacent to the distribution busbar can be designed to be large enough to allow the curved segment 312 of the contact piece 31 adjacent to the distribution busbar to extend directly from the support housing 10, or even the transverse side plate 12 adjacent to the distribution busbar can be ignored.

[0045] like Figure 1 , Figure 2 and Figure 4 As shown, the curved segment 312 of the contact piece 31 adjacent to the connecting terminal can be housed within the support housing 10 and supported by the base plate 11 of the support housing 10 to improve the stability of the contact piece 31 and the connecting terminal connection device. The side plate of the longitudinal side plate 13 facing away from the other longitudinal side plate 13 may be provided with a snap-fit ​​structure 15 to snap-fit ​​with the busbar clamp on the cabinet side and facilitate subsequent removal from the busbar clamp. The snap-fit ​​structure 15 may include a pair of snap-fit ​​protrusions 151 protruding longitudinally from the longitudinal side plate 13, the pair of snap-fit ​​protrusions 151 being arranged laterally spaced on the longitudinal side plate 13 and forming a recess therebetween, so as to engage with the corresponding protrusion on the busbar clamp. Preferably, the surface of the first snap-fit ​​protrusion 151a adjacent to the distribution busbar in the pair of snap-fit ​​protrusions 151 facing the distribution busbar may be designed as a guide slope 152 to facilitate guiding the support housing 10 to connect to the busbar clamp. The second snap protrusion 151b of the pair of snap protrusions 151, which is farther away from the distribution bus and is adjacent to the connection terminal, extends longitudinally beyond the first snap protrusion 151a to form a stop when the support housing 10 is installed to the bus clamp, thereby limiting the maximum insertion depth of the support housing 10 relative to the bus clamp.

[0046] Furthermore, the base plate 11 may be provided with a vertically penetrating clearance opening 111 and a heat dissipation opening 112. The clearance opening 111 is arranged on the section of the base plate 11 opposite to the snap-fit ​​structure 15 and communicates with the adjacent connection opening 121. Based on this, the support housing 10 may be made of a flexible material such as plastic. In this way, when it is necessary to remove the support housing 10 from the bus clamp, the operator can grasp the snap-fit ​​protrusion 151 of the adjacent connection terminal to force a pair of side plates to deform and move towards each other, i.e., towards the clearance opening 111. The snap-fit ​​structure 15 on the longitudinal side plate 13 is thus disengaged from the bus clamp, and the user can then remove the primary contact 100 from the bus clamp and the distribution bus. In addition, the clearance opening 111 may also be arranged between the curved ends of a pair of contact pieces 31 to ensure the support housing 10 supports the contact pieces 31.

[0047] The heat dissipation vent 112 can be arranged on the side of the clearance opening 111 adjacent to the limiting plate 20 and connected to the clearance opening 111, thereby potentially increasing the perforated area on the base plate 11, which can reduce temperature rise and improve heat dissipation. Figure 4 As can be seen, the heat dissipation vent 112 is roughly formed into a quadrilateral opening to provide support for the contact piece 31, and the clearance opening 111 is connected to the heat dissipation vent 112 with a basically constant longitudinal dimension, while it is connected to the adjacent connection opening 121 with a gradually increasing longitudinal dimension, so as to increase the degree to which the longitudinal side plate 13 can deform under external force.

[0048] It should be understood that although this specification describes various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0049] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes, modifications, and combinations made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A primary contact (100) for a withdrawable switchgear, the withdrawable switchgear comprising a cabinet and a removable component that is laterally movable relative to the cabinet, the cabinet housing having a power distribution busbar and the removable component having connecting terminals, characterized in that, The primary contact (100) includes: A support housing (10) is arranged in the cabinet on the transverse side of the power distribution busbar. The support housing (10) includes a base plate (11), a pair of transverse side plates (12) located on the transverse sides of the base plate (11), and a pair of longitudinal side plates (13) located on the longitudinal sides of the base plate (11). The pair of transverse side plates (12) and the pair of longitudinal side plates (13) enclose an installation space, and each transverse side plate (12) is provided with a connecting opening (121) that runs through the transverse side. A limiting plate (20) extends longitudinally within the installation space and has a limiting opening (21) that extends transversely, the limiting opening (21) being aligned with the center of the connecting opening (121) of each transverse side plate (12). A contact component (30) is placed laterally within the mounting space and passes through the limiting opening (21) of the limiting plate (20). The end of the contact component (30) adjacent to the distribution busbar is connected to the distribution busbar via an adjacent connection opening (121). Wherein, the longitudinal dimension of the section of the contact member (30) that is opposite to the limiting plate (20) in the longitudinal direction is smaller than the longitudinal dimension of the limiting opening (21), and the vertical dimension of the section is smaller than the vertical dimension of the installation space, so that when the removable component moves toward the cabinet and the connecting terminal is connected to the end of the contact member (30) near the connecting terminal via the adjacent connecting opening (121), the end of the contact member (30) near the connecting terminal can move relative to the end of the contact member (30) connected to the power distribution bus.

2. The primary contact (100) for a withdrawable switchgear according to claim 1, characterized in that, The contact component (30) includes: A pair of contact pieces (31) extending laterally through the limiting opening (21) and longitudinally symmetrical about each other, the two lateral ends of the pair of contact pieces (31) being respectively configured to clamp the power distribution bus and the connection terminal; The clamping member (32) clamps at least the portions of the pair of contact pieces (31) that are longitudinally opposite to the limiting opening (21).

3. The primary contact (100) for a withdrawable switchgear according to claim 2, characterized in that, The clamping member (32) extends laterally beyond both ends of the limiting opening (21); The support housing (10) further includes a pair of limiting protrusions (14) arranged on both sides of the clamping member (32) to restrict the clamping member (32) from moving laterally relative to the support housing (10).

4. The primary contact (100) for a withdrawable switchgear according to claim 2, characterized in that, The limiting plate (20) includes a pair of limiting plate members (22) extending longitudinally from the pair of longitudinal side plates (13) to cooperate in forming the limiting opening (21), the pair of limiting plate members (22) being arranged parallel to the bottom plate (11); The clamping member (32) includes a support section (321) placed on the base plate (11) and a pair of clamping sections (322) located on both sides of the longitudinal direction of the support section (321). The pair of clamping sections (322) are provided with abutments (323) that extend laterally and protrude toward each other, so as to allow the pair of limiting plates (22) to be located in adjacent abutments (323) in the vertical direction.

5. The primary contact (100) for a withdrawable switchgear according to claim 2, characterized in that, Each contact (31) has a flat surface (314) centrally arranged on the surface of the end of the power distribution busbar facing another contact (31).

6. The primary contact (100) for a withdrawable switchgear according to claim 2 or 3, characterized in that, The sections of the pair of longitudinal side plates (13) and the pair of contact pieces (31) adjacent to the ends of the connecting terminals are provided with a pair of snap-fit ​​structures (15) on the sides facing away from each other for engaging with the cabinet snap-fit.

7. The primary contact (100) for a withdrawable switchgear according to claim 6, characterized in that, The section of the base plate (11) opposite to the pair of snap-fit ​​structures (15) is provided with a vertical through-hole (111), which extends laterally inside the longitudinal direction of the pair of contact pieces (31) and communicates with the adjacent connection opening (121). The support housing (10) is designed to be flexible so that the sections of the pair of longitudinal side plates (13) and the pair of contact pieces (31) adjacent to the ends of the connection terminals can move toward the clearance opening (111) under the action of external force to release the pair of snap-fit ​​structures (15) from the cabinet.

8. The primary contact (100) for a withdrawable switchgear according to claim 7, characterized in that, The base plate (11) is also provided with a heat dissipation vent (112) that runs vertically through the plate and communicates with the clearance opening (111).

9. The primary contact (100) for a withdrawable switchgear according to claim 6, characterized in that, Each snap-fit ​​structure (15) includes a pair of snap-fit ​​protrusions (151) protruding from the longitudinal side plate (13) where it is located. The surface of the first snap-fit ​​protrusion (151a) of the pair of snap-fit ​​protrusions (151) adjacent to the power distribution bus is configured as a guide slope (152) facing the power distribution bus. The second snap-fit ​​protrusion (151b) of the pair of snap-fit ​​protrusions (151) away from the power distribution bus extends beyond the first snap-fit ​​protrusion (151a) from the longitudinal side plate (13) where it is located.

10. A removable switchgear, comprising a cabinet and a pull-out component that can move laterally relative to the cabinet, wherein a power distribution busbar is provided inside the cabinet and the pull-out component is provided with connection terminals, characterized in that... The withdrawable switchgear also includes a primary contact (100) according to any one of claims 1 to 9.

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