Main loop plugging assembly and power distribution cabinet

Abstract

The embodiment of the utility model provides a main loop plugging assembly and a power distribution cabinet. The main loop plugging assembly comprises a cover body, a clamping head and a supporting piece. The cover body comprises a first opening and a second opening which are arranged on two opposite sides. The clamping head penetrates through the cover body, and the two ends of the clamping head extend out of the first opening and the second opening respectively. The support member is detachably coupled to the cover body. The supporting piece comprises a third opening, a limiting groove and a heat dissipation hole. The third opening is disposed on a side of the support adjacent to the second opening and is in communication with an interior of the support. The limiting groove is formed in the side, away from the second opening, of the supporting piece and is suitable for a connector bar to be inserted so as to be electrically connected with the chuck. The heat dissipation holes are formed in the side, away from the second opening, of the supporting piece so that air in the supporting piece can exchange heat with the outside through the heat dissipation holes. By means of the arrangement, heat generated at the position of the chuck can be discharged through the heat dissipation holes in the supporting piece, so that energy loss is reduced, and reliability of electrical connection is improved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure generally relate to the field of electrical equipment, and in particular, to a main circuit plug-in assembly and a power distribution cabinet. BACKGROUND

[0002] Power distribution cabinets of drawer type structure are particularly common. By arranging two or more withdrawable drawer assemblies in the same layer, the modularity and standardization of power distribution units can be achieved. The drawer assemblies can contain electrical elements such as circuit breakers, contactors, relays, electric energy meters, fuses, and transformers. Each drawer functions as an independent unit and can be conveniently installed, replaced, or repaired without affecting the normal operation of other drawers. In some conventional drawer-type power distribution cabinets, the drawer assemblies can be connected to the vertical power supply in the cabinet body through a main circuit plug-in assembly. SUMMARY

[0003] In a first aspect of the present disclosure, a main circuit plug-in assembly is provided. The main circuit plug-in assembly includes a cover body including a first opening and a second opening arranged on opposite sides, a collet penetrating the cover body, and two ends of the collet extending from the first opening and the second opening, respectively, and a support member detachably coupled to the cover body and including a third opening, a limiting slot, and a heat dissipation hole. The third opening is arranged on a side of the support member adjacent to the second opening and communicates with the interior of the support member. The limiting slot is arranged on a side of the support member away from the second opening and is adapted for a wiring strip to be inserted to electrically connect with the collet. The heat dissipation hole is arranged on the side of the support member away from the second opening to allow air in the support member to exchange heat with the outside through the heat dissipation hole.

[0004] In some embodiments, the support member further includes a limiting portion arranged on the side of the support member away from the second opening and extending away from the second opening, and the limiting slot is arranged in the limiting portion.

[0005] In some embodiments, the support member further includes an insulating rib arranged on at least one side of the limiting portion and coupled to the limiting portion, and the limiting portion and the insulating rib surround the heat dissipation hole.

[0006] In some embodiments, the support member further includes a reinforcing portion coupled to the limiting portion on at least one side of the limiting portion.

[0007] In some embodiments, the support member further includes a first through hole penetrating opposite sides of the limiting portion, the first through hole corresponding to a second through hole on the wiring strip, and the main circuit plug-in assembly further includes a connecting member adapted to penetrate the first through hole and the second through hole and detachably coupled to the limiting portion and the wiring strip.

[0008] In some embodiments, the cover includes a pair of clamping slots disposed at the edge of the second opening, and the support includes a pair of connecting portions disposed at the edge of the third opening, the pair of connecting portions being respectively detachably coupled to the pair of clamping slots.

[0009] In some embodiments, the cover includes a first mounting portion disposed at the edge, and the support includes a second mounting portion disposed at the edge, the first mounting portion corresponding to the second mounting portion and being adapted to be detachably coupled to the drawer assembly.

[0010] In some embodiments, the support further includes a partition portion disposed inside the support and adapted to partition the inside of the support into multiple layers of areas for placing the collets.

[0011] In some embodiments, the partition portion includes a step disposed at the surface to form a heat dissipation channel between the collet and the surface of the partition portion.

[0012] In a second aspect of the present disclosure, a power distribution cabinet is provided. The power distribution cabinet includes a cabinet body, a plurality of vertical rows disposed inside the cabinet body, a drawer assembly detachably coupled to the cabinet body and including a plurality of wiring rows, and a plurality of main circuit plug-in assemblies according to the first aspect of the present disclosure coupled to the drawer assembly on a side of the drawer assembly facing the plurality of vertical rows, the plurality of main circuit plug-in assemblies being respectively electrically connected to the plurality of wiring rows and adapted to be respectively electrically connected to the plurality of vertical rows.

[0013] In embodiments of the present disclosure, the main circuit plug-in assembly includes a cover, a collet, and a support. The cover includes a first opening and a second opening disposed at opposite sides. The collet penetrates the cover, and two ends of the collet respectively protrude from the first opening and the second opening. The support is detachably coupled to the cover. The support includes a third opening, a limiting slot, and a heat dissipation hole. The third opening is disposed at a side of the support adjacent to the second opening and communicates with the inside of the support. The limiting slot is disposed at a side of the support away from the second opening and is adapted to allow the wiring row to be inserted to be electrically connected to the collet. The heat dissipation hole is disposed at a side of the support away from the second opening to allow the air inside the support to exchange heat with the outside through the heat dissipation hole. With this arrangement, the collet of the main circuit plug-in assembly can be electrically connected to the wiring row inside the drawer assembly. During the process of energized operation, the heat generated by the collet and the position where the collet contacts the wiring row can be dissipated through the heat dissipation hole on the support, which can reduce the temperature of the collet, thereby reducing energy loss and improving the reliability of electrical connection.

[0014] It should be understood that the content described in this content part is not intended to limit the key features or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become apparent through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0015] The above and other features, advantages, and aspects of embodiments of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which:

[0016] Figure 1 A perspective view of a main circuit plug-in assembly of an embodiment of the present disclosure is shown, wherein a first opening is shown;

[0017] Figure 2 A perspective view of a main circuit plug-in assembly of an embodiment of the present disclosure is shown, wherein a heat dissipation hole is shown;

[0018] Figure 3 An exploded schematic view of a main circuit plug-in assembly of an embodiment of the present disclosure is shown, wherein a heat dissipation hole is shown;

[0019] Figure 4 An exploded schematic view of a main circuit plug-in assembly of an embodiment of the present disclosure is shown, wherein a first opening is shown;

[0020] Figure 5 A sectional view of a main circuit plug-in assembly of an embodiment of the present disclosure is shown;

[0021] Figure 6 A perspective view of a main circuit plug-in assembly of another embodiment of the present disclosure is shown; and

[0022] Figure 7 A perspective view of a drawer assembly of an embodiment of the present disclosure is shown.

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 100, main circuit plug-in assembly;

[0025] 10, cover; 11, first opening; 12, second opening; 13, clamping groove; 14, first mounting portion;

[0026] 20, collet;

[0027] 30, support; 31, limiting portion; 310, limiting groove; 311, first through hole; 32, heat dissipation hole; 33, third opening; 34, insulating protruding rib; 35, reinforcing portion; 36, connecting portion; 37, second mounting portion; 38, partition portion; 381, step;

[0028] 41, connecting piece; 411, blocking portion; 412, bifurcation; 42, threaded member;

[0029] 210, drawer assembly; 211, wiring harness; 212, second through hole. DETAILED DESCRIPTION

[0030] Preferred embodiments of the present disclosure will be described in greater detail below, with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms without being limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0031] The term "comprising" and variations thereof as used herein are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising" and variations thereof as used herein are not used as limitations in this respect. The term "or" as used herein is intended to mean an inclusive "or" rather than an exclusive "or". That is, unless specified otherwise, or clear from the context, the phrase "X employs A or B" is intended to mean that the process, method, article, or apparatus can employ A, or B, or both A and B. The term "based on" does not mean "based only on" unless otherwise specified. The terms "a" and "an" are defined as one or more unless otherwise specified. The term "another" is defined as at least a second or at least one, unless otherwise specified.

[0032] As described above, in some conventional drawer-type switchgear, the drawer assembly can be electrically connected with the vertical busbar in the cabinet through the main circuit plug-in assembly. During operation, the temperature inside the main circuit plug-in assembly can rise due to the resistance of the collet of the main circuit plug-in assembly and the position where the collet contacts the busbar, which can cause the energy loss to increase, and the high temperature can cause the material to deform, oxidize, or other forms of damage, thereby reducing the stability of the electrical connection.

[0033] Embodiments of the present disclosure provide a main circuit plug-in assembly and a switchgear. In the main circuit plug-in assembly, the cover includes a first opening and a second opening disposed on opposite sides. The collet penetrates the cover, and the two ends of the collet respectively extend out of the first opening and the second opening. The support is detachably coupled to the cover. The support includes a third opening, a limiting slot, and a heat dissipation hole. The third opening is disposed on the side of the support adjacent to the second opening and communicates with the inside of the support. The limiting slot is disposed on the side of the support away from the second opening and is adapted for the busbar to be inserted to electrically connect with the collet. The heat dissipation hole is disposed on the side of the support away from the second opening to allow the air inside the support to exchange heat with the outside through the heat dissipation hole. With this arrangement, the collet of the main circuit plug-in assembly can be electrically connected with the busbar in the drawer assembly. During operation, the heat generated by the collet and the position where the collet contacts the busbar can be dissipated through the heat dissipation hole on the support, which can reduce the temperature of the collet, thereby reducing energy loss and improving the reliability of the electrical connection of the main circuit plug-in assembly. The principles of the present disclosure will be described in detail below with reference to the accompanying drawings. Figures 1 to 7

[0034] As Figures 1 to 4 ​As shown, the main circuit plug-in assembly 100 includes a cover 10, a clamp 20, and a support 30. The cover 10 and the support 30 are detachably connected, allowing the clamp 20 to be fixed between them. The cover 10 and the support 30 can also be mounted on the outer frame of the drawer assembly 210, thereby fixing the entire main circuit plug-in assembly 100 onto the drawer assembly 210. The clamp 20 serves as a current transmission connection component; one end of the clamp 20 is electrically connected to the terminal block 211 inside the drawer assembly 210, while the other end of the clamp 20 is electrically connected to the vertical busbar inside the distribution cabinet when the drawer assembly 210 is installed. In this way, even under frequent plugging and unplugging operations, good contact can be maintained between the terminal block 211 inside the drawer assembly 210 and the vertical busbar inside the distribution cabinet, thus establishing a stable and reliable circuit path.

[0035] like Figures 1 to 5 As shown, the cover 10 includes a first opening 11 and a second opening 12. The first opening 11 and the second opening 12 are located on opposite sides of the cover 10 and communicate with the interior of the cover 10. The cover 10 has a hollow structure, allowing the clamp 20 to pass through the entire cover 10. The two ends of the clamp 20 can extend from the first opening 11 and the second opening 12 respectively, and then make electrical connections with the vertical bar and the terminal block 211 in the drawer assembly 210 of the distribution cabinet.

[0036] As an example, such as Figures 1 to 4 As shown, the number of clamps 20 can be multiple. For example, three clamps 20 can be arranged side by side. With this arrangement, multiple clamps 20 increase the conductivity of the main circuit plug-in assembly 100, making it suitable for distribution cabinets with large rated operating currents.

[0037] As another example, such as Figure 6 As shown, the number of clamps 20 can also be one. The two ends of a single clamp 20 can be electrically connected to the vertical bar inside the distribution cabinet and the terminal block 211 inside the drawer assembly 210, respectively. With this arrangement, a single clamp 20 can be used in distribution cabinets with relatively low rated operating current.

[0038] It should be understood that in other embodiments, the number of chucks 20 can be set as needed, and the size of the chucks 20 can also be adjusted as needed. This disclosure is not intended to limit the specific number or specifications.

[0039] like Figures 1 to 4As shown, the support 30 is detachably coupled to the cover 10. When the support 30 and the cover 10 are fixed together, the collet 20 can be fixed inside the support 30 and the cover 10. The support 30 includes a third opening 33, a limiting slot 310, and a heat dissipation hole 32. The third opening 33 is arranged on a side of the support 30 adjacent to the second opening 12 and communicates with the inside of the support 30. An end of the collet 20 protruding from the second opening 12 is inserted into the inside of the support 30. The limiting slot 310 is arranged on a side of the support 30 away from the second opening 12, and the limiting slot 310 also communicates with the inside of the support 30. The wiring harness 211 in the drawer assembly 210 can be inserted into the limiting slot 310 and electrically connected to the collet 20. In addition, the limiting slot 310 can also limit the wiring harness 211 of the drawer assembly 210, avoiding relative displacement between the wiring harness 211 and the collet 20, thereby ensuring the stability of the electrical connection.

[0040] As shown in Figure 2 and Figure 3 The heat dissipation hole 32 is arranged on a side of the support 30 away from the second opening 12, and the air in the support 30 can exchange heat with the outside through the heat dissipation hole 32. In this way, the heat generated at the collet 20 and the position where the collet 20 contacts the wiring harness 211 can be discharged from the inside of the support 30, reducing the temperature rise problem caused by the current passing through the collet 20.

[0041] With this arrangement, during the power-on operation, the heat generated at the collet 20 and the position where the collet 20 contacts the wiring harness 211 can be discharged through the heat dissipation hole 32 on the support 30, which can reduce the temperature of the collet 20, thereby reducing the energy loss at the main circuit plug-in assembly 100 and improving the reliability of the electrical connection.

[0042] In some embodiments, as shown in Figures 1 to 4 The support 30 also includes a limiting portion 31. The limiting portion 31 is arranged on a side of the support 30 away from the second opening 12, and the limiting portion 31 extends away from the second opening 12. The limiting slot 310 is arranged in the limiting portion 31. As an example, the limiting portion 31 can be a rectangular middle frame, and the rectangular limiting slot 310 is arranged in the rectangular middle frame. With this arrangement, the wiring harness 211 in the drawer assembly 210 can be inserted into the rectangular limiting slot 310. The limiting portion 31 can surround the wiring harness 211, thereby supporting and limiting the wiring harness 211. The wiring harness 211 can be inserted into the support 30 from the limiting slot 310 and electrically connected to the collet 20 inside the support 30.

[0043] In addition, the limiting portion 31 also has insulation protection performance. The outer frame of the drawer assembly 210 can be a metal conductive structure. When the support 30 is installed on the outer frame of the drawer assembly 210, the limiting portion 31 is wrapped outside the wiring row 211. The limiting portion 31 can form an insulation protection layer outside the wiring row 211, thereby increasing the insulation performance between the wiring row 211 and the outer frame of the drawer assembly 210, and improving the safety of the drawer assembly 210.

[0044] In some embodiments, the greater the length of the extension of the limiting portion 31, the more the area of the wiring row 211 surrounded by the limiting portion 31, and the stronger the insulation performance provided by the limiting portion 31. In other embodiments, the insulation performance between the wiring row 211 and the outer frame of the drawer assembly 210 can also be increased by adjusting the thickness and material of the limiting portion 31. It should be understood that the insulation performance of the limiting portion 31 is related to its extension length, thickness, and material, and the operator can select appropriate dimensions and materials as needed, and the present disclosure is not intended to limit the specific dimensions and materials.

[0045] In some embodiments, as shown in Figure 2 and Figure 3 , the support 30 also includes an insulation protruding rib 34. The insulation protruding rib 34 is disposed on at least one side of the limiting portion 31, and the insulation protruding rib 34 is coupled to the limiting portion 31. The limiting portion 31 and the insulation protruding rib 34 surround the heat dissipation hole 32. With this arrangement, the insulation protruding rib 34 and the limiting portion 31 can form a continuous annular insulation barrier outside the heat dissipation hole 32, and the safety distance between the chuck 20 and the outer frame of the drawer assembly 210 can be increased at the heat dissipation hole 32, thereby avoiding the discharge phenomenon between the chuck 20 and the outer frame of the drawer assembly 210 at the heat dissipation hole 32.

[0046] In some embodiments, as shown in Figure 2 and Figure 3 , the support 30 includes a pair of heat dissipation holes 32 and a pair of insulation protruding ribs 34. The limiting portion 31 is located between the pair of heat dissipation holes 32, and the limiting portion 31 can provide insulation protection on one side of each heat dissipation hole 32. Each insulation protruding rib 34 surrounds the remaining three sides of the corresponding heat dissipation hole 32, and can surround the corresponding heat dissipation hole 32 with the limiting portion 31, thereby forming a continuous insulation barrier outside the heat dissipation hole 32.

[0047] In some embodiments, as shown in Figure 2 and Figure 3 , each heat dissipation hole 32 can include a plurality of sub-heat dissipation holes 32, and the plurality of sub-heat dissipation holes 32 are adjacently disposed. The insulation protruding rib 34 and the limiting portion 31 can surround the plurality of sub-heat dissipation holes 32, thereby providing an insulation barrier outside the plurality of sub-heat dissipation holes 32.

[0048] In some embodiments, as shown in Figure 2and Figure 3 As shown, the support 30 further comprises a reinforcing portion 35. The reinforcing portion 35 is coupled to the limiting portion 31 at at least one side of the limiting portion 31. With this arrangement, the reinforcing portion 35 can provide lateral support to the limiting portion 31, increasing the lateral bending strength of the limiting portion 31, and thus the overall structural strength of the support 30.

[0049] In some embodiments, as shown in Figure 2 and Figure 3 As shown, the support 30 comprises a pair of reinforcing portions 35. For example, four reinforcing portions 35, two on each side of the limiting portion 31. As an example, the reinforcing portion 35 can be triangular or trapezoidal in shape. As mentioned earlier, the limiting portion 31 can form a cantilever structure on the support 30, and the pair of reinforcing portions 35 can increase the bending strength of the limiting portion 31, preventing the limiting portion 31 from breaking at the root under external force, and thus increasing the overall strength of the support 30.

[0050] In some embodiments, as shown in Figure 2 and Figure 3 As shown, the support 30 further comprises a first through hole 311 that extends through opposite sides of the limiting portion 31. The wiring strip 211 in the drawer assembly 210 is provided with a second through hole 212. After the wiring strip 211 is inserted into the limiting slot 310 and electrically connected to the chuck 20, the first through hole 311 corresponds to the second through hole 212 on the wiring strip 211. The main circuit plug-in assembly 100 further comprises a connecting member 41. The connecting member 41 can extend through the first through hole 311 and the second through hole 212, and the connecting member 41 is detachably coupled to the limiting portion 31 and the wiring strip 211. With this arrangement, after the wiring strip 211 is inserted into the limiting slot 310, the connecting member 41 can be inserted into the first through hole 311 and the second through hole 212, thereby fixing the wiring strip 211 and the main circuit plug-in assembly 100 together, and the connecting member 41 can maintain the stable connection between the wiring strip 211 and the chuck 20.

[0051] As an example, as shown in Figure 3 and Figure 4 As an example, the connecting member 41 can be a pin. In this way, the pin can be inserted into the first through hole 311 and the second through hole 212, thereby fixing the wiring strip 211 and the main circuit plug-in assembly 100 together.

[0052] In some embodiments, one end of the pin includes a blocking portion 411, and the other end of the pin can include two prongs 412 spaced apart from each other, and the two prongs 412 are flexible. When the two prongs 412 are close to each other, the pin can be inserted into the first through hole 311 and the second through hole 212. After the pin is fully inserted into the first through hole 311 and the second through hole 212, the two prongs are separated under the action of elasticity, so that the pin can be fixed in the first through hole 311 and the second through hole 212. With this arrangement, the efficiency of installation and disassembly of the pin is improved.

[0053] As another example, the connecting member 41 can be a threaded member. In this way, the threaded member can be inserted into the first through hole 311 and the second through hole 212, and then the wiring panel 211 and the main circuit patch assembly 100 can be fixed together through the cooperation of the threaded member and the nut.

[0054] In some embodiments, as shown in Figure 3 and Figure 4 The cover 10 includes a pair of clamping grooves 13 arranged at the edge of the second opening 12. The support 30 includes a pair of connecting portions 36 arranged at the edge of the third opening 33, and the pair of connecting portions 36 are respectively detachably coupled to the pair of clamping grooves 13. With this arrangement, when the cover 10 and the support 30 are aligned, the pair of clamping grooves 13 respectively correspond to the pair of connecting portions 36. By pressing the cover 10 and the support 30 towards each other, the pair of connecting portions 36 can be respectively inserted into the pair of clamping grooves 13, thereby achieving the connection between the cover 10 and the support 30. When disassembling the cover 10 and the support 30, pressing the pair of connecting portions 36 to slightly deform can make the pair of connecting portions 36 exit from the corresponding clamping grooves 13, thereby disassembling the cover 10 from the support 30.

[0055] In some embodiments, as shown in Figure 2 and Figure 3 The cover 10 includes a first mounting portion 14 arranged at the edge. The support 30 includes a second mounting portion 37 arranged at the edge. The first mounting portion 14 corresponds to the second mounting portion 37 and is adapted to be detachably coupled to the drawer assembly 210. As an example, the number of the first mounting portion 14 and the second mounting portion 37 can be three, and the three first mounting portions 14 respectively correspond to the three second mounting portions 37. Threaded holes can be arranged on the first mounting portion 14 and the second mounting portion 37, and three threaded members 42 are respectively inserted into the three threaded holes, so as to fix the first mounting portion 14 and the second mounting portion 37 together. In addition, the three threaded members 42 can be connected with the outer frame of the drawer assembly 210, so as to fix the main circuit patch assembly 100 on the outer frame of the drawer assembly 210.

[0056] In some embodiments, as shown in Figure 4As shown, the support 30 further comprises a partition 38. The partition 38 is arranged inside the support 30, and the partition 38 can divide the inside of the support 30 into multiple layers of areas for placing the collet 20. As an example, as shown in Figure 4 As shown, two partitions 38 are arranged inside the support 30, and the two partitions 38 can divide the inside of the support 30 into three layers of areas, and one collet 20 can be placed in each layer of area, so as to limit three collets 20.

[0057] In some embodiments, as shown, Figure 4 As shown, the partition 38 comprises a step 381 arranged at the surface. The step 381 can form a heat dissipation channel between the collet 20 and the surface of the partition 38. In this way, when the one end of the collet 20 is inserted into the inside of the support 30, the collet 20 and the surface of the partition 38 are not in direct contact, but form a heat dissipation channel under the support of the step 381. The heat dissipation channel helps to dissipate the heat of the collet 20 outward, thereby helping to reduce the temperature of the collet 20.

[0058] In a second aspect of the present disclosure, a power distribution cabinet is provided. As shown, Figure 7 The power distribution cabinet comprises a cabinet body, a plurality of vertical rows, a drawer assembly 210, and a plurality of main circuit plug-in assemblies 100 of any one of the above. The plurality of vertical rows are arranged in the cabinet body. A slide rail is arranged in the cabinet body, and the drawer assembly 210 is detachably coupled to the slide rail on the cabinet body. When an operator applies an external force to the drawer assembly 210, the drawer assembly 210 can be pulled out of the cabinet body. When an internal force is applied to the drawer assembly 210, the drawer assembly 210 can be pushed into the cabinet body. The drawer assembly 210 comprises a plurality of wiring rows 211. The plurality of main circuit plug-in assemblies 100 are arranged on the side of the drawer assembly 210 facing the plurality of vertical rows, and the plurality of main circuit plug-in assemblies 100 are coupled to the drawer assembly 210.

[0059] As an example, the number of vertical rows can be four, and the number of main circuit plug-in assemblies 100 can also be four, and the four vertical rows correspond to three phase lines and a neutral line of a three-phase circuit respectively. The four main circuit plug-in assemblies 100 correspond to the four vertical rows respectively.

[0060] The plurality of wiring rows 211 in the drawer assembly 210 are respectively inserted into the limiting grooves 310 of the plurality of main circuit plug-in assemblies 100, and are electrically connected with the corresponding collets 20. When the drawer assembly 210 is pushed into the cabinet body, the plurality of main circuit plug-in assemblies 100 can be electrically connected with the plurality of vertical rows respectively.

[0061] With this arrangement, the clip 20 of the main circuit plug-in assembly 100 can be electrically connected with the terminal strip 211 in the drawer assembly 210 within the switchgear cabinet. During operation, the heat generated by the clip 20 and the location where the clip 20 contacts the terminal strip 211 can be dissipated through the heat dissipation holes 32 on the support 30, which can reduce the temperature of the clip 20, thereby reducing the energy loss at the main circuit plug-in assembly 100 and improving the reliability of the electrical connection of the main circuit plug-in assembly 100.

[0062] Embodiments of the present disclosure have been described above, the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles, practical applications, or technical improvements in the market of the embodiments, or to enable other ordinary skilled in the art to understand the embodiments disclosed herein.

Claims

1. A primary circuit plug-in assembly (100), characterized by, The main circuit plug-in assembly (100) comprises: a cover (10) comprising a first opening (11) and a second opening (12) arranged at opposite sides; a clamp (20) penetrating the cover (10), and two ends of the clamp (20) respectively protruding from the first opening (11) and the second opening (12); and a support (30) detachably coupled to the cover (10) and comprising a third opening (33), a limiting groove (310) and a heat dissipation hole (32), the third opening (33) being arranged at a side of the support (30) adjacent to the second opening (12) and communicating with an interior of the support (30), the limiting groove (310) being arranged at a side of the support (30) away from the second opening (12) and adapted for a wiring harness (211) to be inserted to electrically connect with the clamp (20), and the heat dissipation hole (32) being arranged at a side of the support (30) away from the second opening (12) to enable air in the support (30) to exchange heat with the outside through the heat dissipation hole (32).

2. Primary circuit plug-in assembly (100) according to claim 1, characterized in that The support (30) further comprises: a limiting portion (31) arranged at a side of the support (30) away from the second opening (12) and extending towards a direction away from the second opening (12), and the limiting groove (310) being arranged in the limiting portion (31).

3. Primary circuit plug-in assembly (100) according to claim 2, characterized in that The support (30) further comprises: an insulating protruding rib (34) arranged at at least one side of the limiting portion (31) and coupled to the limiting portion (31), the limiting portion (31) and the insulating protruding rib (34) surrounding the heat dissipation hole (32).

4. The primary circuit plug-in assembly (100) according to claim 2, characterized in that The support (30) further comprises: a reinforcing portion (35) coupled to the limiting portion (31) at at least one side of the limiting portion (31).

5. The primary circuit plug-in assembly (100) according to claim 2, characterized in that The support (30) further comprises a first through hole (311) penetrating opposite sides of the limiting portion (31), the first through hole (311) corresponding to a second through hole (212) on the wiring harness (211), and the main circuit plug-in assembly (100) further comprises: a connecting piece (41) adapted to penetrate the first through hole (311) and the second through hole (212) and detachably coupled to the limiting portion (31) and the wiring harness (211).

6. Primary circuit plug-in assembly (100) according to any one of claims 1 to 5, characterized in that The cover (10) comprises a pair of clamping grooves (13) arranged at edges of the second opening (12), the support (30) comprises a pair of connecting portions (36) arranged at edges of the third opening (33), and the pair of connecting portions (36) are respectively detachably coupled to the pair of clamping grooves (13).

7. Primary circuit plug-in assembly (100) according to any one of claims 1 to 5, characterized in that The cover (10) comprises a first mounting portion (14) arranged at an edge, the support (30) comprises a second mounting portion (37) arranged at an edge, the first mounting portion (14) corresponds to the second mounting portion (37) and is adapted to be detachably coupled to a drawer assembly (210).

8. Primary circuit plug-in assembly (100) according to any one of claims 1 to 5, characterized in that The support (30) further comprises: A partition (38) is provided inside the support (30) and is adapted to partition the inside of the support (30) into multiple layers of areas for placing the collets (20).

9. Primary circuit plug-in assembly (100) according to claim 8, characterized in that The partition (38) comprises a step (381) provided at a surface to form a heat dissipation channel between the collets (20) and the surface of the partition (38).

10. A power distribution cabinet, characterized by, Comprising: a cabinet body; a plurality of vertical rows provided inside the cabinet body; a drawer assembly (210) detachably coupled to the cabinet body and comprising a plurality of wiring rows (211); and a plurality of main loop plug-in assemblies (100) according to any one of claims 1 to 9 coupled to the drawer assembly (210) at a side of the drawer assembly (210) facing the plurality of vertical rows, the plurality of main loop plug-in assemblies (100) respectively electrically connected with the plurality of wiring rows (211) and adapted to be respectively electrically connected with the plurality of vertical rows.

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