Compact low-voltage cabinet

Abstract

A compact low-voltage cabinet, comprising a cabinet body, vertical busbar modules and feeder busbar modules, wherein each vertical busbar module comprises a multi-phase first vertical busbar, and each feeder busbar module comprises a multi-phase feeder busbar; a multi-phase incoming contact configured to be correspondingly connected to a multi-phase first vertical busbar and a multi-phase outgoing contact configured to be correspondingly connected to a multi-phase feeder busbar are provided at the rear of a switchgear; each vertical busbar module and each feeder busbar module are arranged at the rear of the corresponding switchgear; the direction of the width of each first vertical busbar extends in a front-rear direction, and the direction of the length thereof extends in a vertical direction; the direction of the width of each feeder busbar extends in the vertical direction, and the direction of the length thereof extends in the front-rear direction; and multi-phase first vertical busbars and multi-phase feeder busbars are alternately arranged in a left-right direction. The compact low-voltage cabinet in the present application is used for mounting switchgears, and by means of the alternating arrangement, the vertical busbar modules and the feeder busbar modules can be uniformly arranged at the rear of the switchgears, thereby forming a unique staggered compact busbar system and reducing the occupied space.

Description

Compact low-voltage cabinet

[0001] The present application claims priority to Chinese patent application No. CN202420803734.2, filed on April 17, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of low-voltage electrical apparatus, in particular to a compact low-voltage cabinet. BACKGROUND

[0003] At present, in the low-voltage complete cabinet on the market, the main problem of the multi-circuit feeder cabinet scheme is that the cabinet size is large, the busbar consumption is large, and the heat dissipation is poor. The traditional scheme: the circuit breaker contact is symmetrical and equal in length. The vertical bus is placed on the left or right side of the circuit breaker, and the width direction of the side vertical bus is parallel to the plane of the circuit breaker panel. The connection between the circuit breaker and the vertical bus is realized through the transfer bus. Since the vertical bus is far away from the circuit breaker contact, the bus connection path is long, which is called the side vertical bus scheme. The feeder bus is connected to the circuit breaker contact, and the feeder bus end is provided with a cable connection hole. The cable is fixed by bolts to transmit power to the next level of power equipment. Since the feeder bus and the vertical bus are relatively independent in space, the two bus modules occupy a large cabinet space. SUMMARY

[0004] The present application aims to overcome at least one of the deficiencies of the prior art and provide a compact low-voltage cabinet.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] The compact low-voltage cabinet is used for installing multiple switch devices, comprising a cabinet body, a vertical bus module and a feeder bus module. The vertical bus module comprises a multi-phase first vertical bus, and the feeder bus module comprises a multi-phase feeder bus. The rear of the switch device is provided with a multi-phase incoming line contact for corresponding connection with the multi-phase first vertical bus and a multi-phase outgoing line contact for corresponding connection with the multi-phase feeder bus. The vertical bus module and the feeder bus module are arranged behind the switch device. The width direction of the first vertical bus extends along the front-rear direction and the length direction along the up-down direction. The width direction of the feeder bus extends along the up-down direction and the length direction along the front-rear direction. The multi-phase first vertical bus and the multi-phase feeder bus are arranged alternately in the left-right direction.

[0007] Optionally, the incoming line contact is arranged in the width direction of the incoming line end of the first vertical busbar in the up-down direction and the length direction in the front-rear direction, the outgoing line contact is arranged in the width direction of the outgoing line end of the outgoing line contact in the up-down direction and the length direction in the front-rear direction, the incoming line end of the multi-phase incoming line contact and the outgoing line end of the multi-phase outgoing line contact are arranged in the up-down direction between the corresponding phases, and the outgoing line end of the multi-phase outgoing line contact and the incoming line end of the multi-phase incoming line contact are arranged in the left-right direction between the corresponding phases and are stacked on the side of the corresponding phase of the outgoing busbar.

[0008] Optionally, the incoming line end of the incoming line contact protrudes backward in the front-rear direction from the outgoing line end of the outgoing line contact and is stacked on the side of the corresponding phase of the first vertical busbar.

[0009] Optionally, the outer surface of the incoming line contact and the outgoing line contact is provided with a graphene coating.

[0010] Optionally, the vertical busbar module further comprises a plurality of second vertical busbars of the same number of phases as the first vertical busbars, the second vertical busbars are arranged in the width direction in the front-rear direction and the length direction in the up-down direction, the length of the second vertical busbars is less than the length of the first vertical busbars, the second vertical busbars are arranged in the mounting gap between the current start end of the corresponding phase of the first vertical busbar and the corresponding incoming line contact is arranged in the mounting gap.

[0011] Optionally, a plurality of switch devices and a plurality of outgoing busbar modules are provided, the plurality of switch devices are arranged in the up-down direction, and the plurality of outgoing busbar modules are arranged in the up-down direction and correspond to the plurality of switch devices.

[0012] Optionally, the vertical busbar module further comprises an insulating supporting plate and at least one first busbar clamp, the insulating supporting plate is provided with a busbar slot, the first busbar clamp is provided with a plurality of first clamping grooves, the current end of the first vertical busbar is inserted into the busbar slot, and the side edge of each phase of the first vertical busbar is inserted into the corresponding first clamping groove.

[0013] Optionally, the outgoing busbar module further comprises at least one second busbar clamp, the second busbar clamp is provided with a plurality of second clamping grooves, and the side edge of each phase of the outgoing busbar is inserted into the corresponding second clamping groove.

[0014] Optionally, the incoming line ends of the incoming line contacts are laminated on the side of the first vertical bus bars of the corresponding phase and are fixed by incoming line fixing bolts, the multi-phase first vertical bus bars include A-phase first vertical bus bars, B-phase first vertical bus bars, C-phase first vertical bus bars and N-phase first vertical bus bars arranged in sequence and spaced in the left-right direction, and the multi-phase incoming line contacts include A-phase incoming line contacts, B-phase incoming line contacts and C-phase incoming line contacts arranged in sequence and spaced in the left-right direction; the outgoing line ends of the outgoing line contacts are laminated on the side of the feeder bus bars of the corresponding phase and are fixed by outgoing line fixing bolts, the multi-phase feeder bus bars include A-phase feeder bus bars, B-phase feeder bus bars, C-phase feeder bus bars and N-phase feeder bus bars arranged in sequence and spaced in the left-right direction, and the multi-phase outgoing line contacts include A-phase outgoing line contacts, B-phase outgoing line contacts and C-phase outgoing line contacts arranged in sequence and spaced in the left-right direction.

[0015] Optionally, the N-phase feeder bus bar is laminated on the side of the N-phase first vertical bus bar and is fixed by an N-phase fixing bolt.

[0016] Optionally, the size of the cabinet body in the left-right direction is W, and 400mm≤W≤600mm.

[0017] Optionally, the size W of the cabinet body in the left-right direction is 400mm, or 450mm, or 500mm, or 550mm, or 600mm.

[0018] Optionally, the vertical bus bar module and / or the feeder bus bar module include a bus bar fixing device, and the bus bar fixing device includes:

[0019] A third bus bar clamp is provided with a fixing channel, and a plurality of clamping pieces are arranged on the inner side wall of the fixing channel in the height direction of the fixing channel.

[0020] A fixing piece includes a fixing portion and a first clamping portion arranged on the opposite sides of the fixing portion, the fixing portion is located in the fixing channel and can move in the height direction of the fixing channel, and the first clamping portion can be clamped to the corresponding clamping piece.

[0021] Optionally, the bus bar fixing device further includes a clamping piece, the clamping piece is detachably connected to the fixing portion, and the clamping piece is used for clamping the bus bar of the vertical bus bar module or the feeder bus bar module in the width direction of the fixing channel.

[0022] Optionally, the clamping member comprises a clamping portion, a sliding portion and a third clamping portion, the opposite sides of the clamping portion are respectively provided with the third clamping portion, the third clamping portion can be clamped to the corresponding clamping piece, the sliding portion is arranged at one end of the clamping portion, the end of the fixing portion is provided with a sliding groove, the sliding portion is inserted into the sliding groove, the other end of the clamping portion is provided with a clamping groove, the groove width of the clamping groove is matched with the width of the busbar of the vertical busbar module or the feeder busbar module, and the busbar of the vertical busbar module or the feeder busbar module is inserted into the clamping groove.

[0023] Optionally, the busbar fixing device further comprises a pad, the pad is clamped between the busbar of the vertical busbar module or the feeder busbar module and the inner side wall of the fixing channel in the width direction of the fixing channel, the pad is provided with a fourth clamping portion, and the fourth clamping portion is clamped and matched with the clamping piece.

[0024] Optionally, the vertical busbar module and / or the feeder busbar module comprise a fourth busbar clamp, the fourth busbar clamp comprises a busbar clamp body and a busbar through hole arranged on the busbar clamp body, the busbar clamp further comprises a protruding structure, a plurality of protruding structures are arranged at intervals on the hole wall of the busbar through hole in the first direction and / or the second direction, the busbar through hole is used for penetrating the busbar of the vertical busbar module or the feeder busbar module, and the plurality of protruding structures are used for abutting against the busbar of the vertical busbar module or the feeder busbar module.

[0025] Optionally, the protruding structure is detachably arranged on the hole wall of the busbar through hole.

[0026] The hole wall of the busbar through hole is provided with a limiting hole.

[0027] The protruding structure comprises an adjusting column and a protruding platform, one end of the adjusting column is connected with the protruding platform, the other end of the adjusting column is inserted into the limiting hole, and the adjusting column is screwed with the limiting hole.

[0028] The compact low-voltage cabinet of the application is used for installing switch devices, and the vertical busbar module and the feeder busbar module are alternately arranged, so that the vertical busbar module and the feeder busbar module can be uniformly arranged behind the switch devices, a unique staggered compact busbar system is formed, the space occupied by the busbar in the cabinet body is greatly reduced, the problem of the width of the traditional side vertical busbar occupying the cabinet body is solved, the space is maximally saved, the size of the low-voltage cabinet is reduced, and meanwhile, electrical isolation between the two busbar modules can be realized by increasing the electrical clearance and the creepage distance.

[0029] In addition, the inlet and outlet contacts are arranged in the same direction and are arranged in left-right staggered arrangement, the structure is compact, the occupied space is saved, direct connection between the busbar and the busbar can be realized, the transfer busbar structure is cancelled, and the amount of busbar is saved.

[0030] In addition, the first vertical bus is directly connected with the lengthened incoming line contact without the need of an adapter bus extending towards the incoming line contact, thus shortening the bus path, reducing the amount of bus, lowering the production cost, and on the other hand, reducing the bus adapter points, i.e. the number of heat points, which is beneficial to lower the temperature rise of the cabinet.

[0031] In addition, the second vertical bus is set to be shorter than the first vertical bus, which conforms to the principle of economy and practicability, and saves the amount of bus.

[0032] In addition, the third bus clamp is provided with a fixing channel for fixing the bus, and the inner side wall of the fixing channel is provided with a clamping piece in the height direction of the fixing channel. The fixing piece includes a fixing part and a first clamping part arranged on the opposite sides of the fixing part. The fixing part is placed in the fixing channel and can move in the height direction of the fixing channel. After adjusting the position of the fixing part in the fixing channel, the first clamping part is clamped on the corresponding clamping piece to fix the bus in the height direction, and the installation stability is high. Adjusting the position of the fixing part can be suitable for the installation of buses of different heights, improving the universality of the fixing piece, reducing the number of bus clamps, and reducing the mold cost, thereby reducing the cost of the entire fixing device

[0033] In addition, the fourth bus clamp includes a bus clamp body and a protruding structure. The bus clamp body is provided with a bus hole, and the hole wall of the bus hole is spaced apart from the protruding structure in the first direction and / or the second direction. The bus hole is used for the bus to pass through, and the protruding structure is used for abutting against the bus. The bus clamp body is an insulating piece. When the bus is inserted into the bus hole, the outer peripheral wall of the bus abuts against the protruding structure in the bus hole, reducing the abutting area between the bus and the inner peripheral wall of the bus hole, and thereby facilitating heat dissipation of the bus. BRIEF DESCRIPTION OF DRAWINGS

[0034] FIG. 1 is a front view of the low-voltage cabinet of the present application;

[0035] FIG. 2 is a perspective view of the low-voltage cabinet of the present application;

[0036] FIG. 3 is a one-view diagram of the switchgear, vertical bus module and feeder bus module of the present application;

[0037] FIG. 4 is another view of the switchgear, vertical bus module and feeder bus module of the present application;

[0038] FIG. 5 is a structural schematic diagram of the switchgear of the present application;

[0039] FIG. 6 is a structural schematic diagram of the vertical bus module of the present application;

[0040] FIG. 7 is a structural schematic diagram of the feeder bus module of the present application, which lacks the N-phase feeder bus;

[0041] Figure 8 is an exploded view of the fixing member, clamping member, first sliding member and second sliding member of the present application;

[0042] Figure 9 is a structural schematic view of the third busbar clamp of the present application;

[0043] Figure 10 is a partial enlarged view of I in Figure 9;

[0044] Figure 11 is a partial enlarged view of II in Figure 9;

[0045] Figure 12 is a structural schematic view of the cushion block, boss and buckle of the present application;

[0046] Figure 13 is a structural schematic view of the busbar fixing device of the present application;

[0047] Figure 14 is a partial enlarged view of III in Figure 13;

[0048] Figure 15 is a structural schematic view of the fourth busbar clamp of the present application;

[0049] Figure 16 is a structural schematic view of the protruding structure of the present application. Cabinet 1; faceplate 11; vertical busbar module 2; first vertical busbar 21; A-phase first vertical busbar 211; B-phase first vertical busbar 212; C-phase first vertical busbar 213; N-phase first vertical busbar 214; second vertical busbar 22; A-phase second vertical busbar 221; B-phase first vertical busbar 222; C-phase second vertical busbar 223; N-phase second vertical busbar 224; installation gap 23; insulating support plate 24; busbar slot 241; first busbar clamp 25; first clamping groove 251; first clamping strip 252; first connecting rod 253; feeder busbar module 3; feeder busbar 31; A-phase feeder busbar 311; B-phase feeder busbar 312; C-phase feeder busbar 313; N-phase feeder busbar 314; second busbar clamp 32; second clamping groove 321; second clamping strip 322; second connecting rod 323; cable fixing bolt 33; current transformer 34; N-phase fixing bolt 35; switchgear 4; incoming line contact 41; A-phase incoming line contact 411; B-phase incoming line contact 412; C-phase incoming line contact 413; outgoing line contact 42; A-phase outgoing line contact 421; B-phase outgoing line contact 422; C-phase outgoing line contact 423; incoming line fixing bolt 43; outgoing line fixing bolt 44; third busbar clamp 5; fixing channel 51; clamping member 52; mounting hole 53; connecting groove 54; fixing groove 55; fixing member 6; fixing portion 61; sliding groove 611; first clamping portion 62; clamping member 7; clamping portion 71; clamping groove 711; sliding portion 72; third clamping portion 73; fourth busbar clamp 8; busbar clamp body 81; busbar perforation 811; protruding structure 82; adjusting column 821; protruding platform 822; first direction X; second direction Y; cushion block 9; fourth clamping portion 91; boss 92; buckle 93. DETAILED DESCRIPTION

[0050] The following embodiments of the compact low-voltage cabinet of the present application are further illustrated with reference to the accompanying drawings. The compact low-voltage cabinet of the present application is not limited to the description of the following embodiments.

[0051] As shown in FIGS. 1-4, the compact low-voltage cabinet of the present embodiment, for installing one or more switching devices 4, comprises a cabinet 1, a vertical busbar module 2 comprising a multi-phase first vertical busbar 21, and a feeder busbar module 3 comprising a multi-phase feeder busbar 31, the switching device 4 is provided with multi-phase incoming line contacts 41 for corresponding connection with the multi-phase first vertical busbar 21 and multi-phase outgoing line contacts 42 for corresponding connection with the multi-phase feeder busbar 31, the vertical busbar module 2 and the feeder busbar module 3 are arranged behind the switching device 4, the width direction of the first vertical busbar 21 extends along the front-rear direction and the length direction extends along the up-down direction, the width direction of the feeder busbar 31 extends along the up-down direction and the length direction extends along the front-rear direction, and the multi-phase first vertical busbar 21 and the multi-phase feeder busbar 31 are arranged alternately in the left-right direction. The compact low-voltage cabinet of the present embodiment, for installing switching devices 4, achieves unified arrangement behind the switching device 4 by alternating arrangement of the vertical busbar module 2 and the feeder busbar module 3, forming a unique staggered compact busbar system, which greatly reduces the space occupied by the busbar in the cabinet 1, solves the problem of the width occupied by the traditional side vertical busbar in the cabinet 1, maximizes space saving, reduces the size of the low-voltage cabinet, and also ensures electrical isolation between the two busbar modules by increasing the electrical clearance and creepage distance.

[0052] The low-voltage cabinet of the present embodiment is a multi-circuit feeder cabinet, electrical energy is input from the vertical busbar module 2, transferred through the switching device 4, and finally distributed to the multi-circuit feeder busbar module 3. Of course, the low-voltage cabinet of the present embodiment can also be a multi-circuit incoming line cabinet, an incoming line and feeder hybrid cabinet, etc. The switching device shown in the drawings of the present embodiment is a frame circuit breaker, but it can also be a miniature air circuit breaker, a molded case circuit breaker, a universal circuit breaker, a disconnector, a knife switch, etc. It should be noted that the orientation description in the present embodiment is based on the front panel 11 in front, as shown in FIGS. 1-2, the height direction of the cabinet 1 is the up-down direction, the width direction of the cabinet 1 is the left-right direction, and the depth direction of the cabinet 1 is the front-rear direction.

[0053] As shown in FIG. 5, the incoming line contact 41 for connecting with the first vertical busbar 21 is arranged in the width direction of the incoming line end extending along the up-down direction and the length direction along the front-back direction, the outgoing line contact 42 for connecting with the feeder busbar 31 is arranged in the width direction of the outgoing line end extending along the up-down direction and the length direction along the front-back direction, that is, the incoming line end of the incoming line contact 41 and the outgoing line end of the outgoing line contact 42 are arranged in parallel, the incoming line end of the multi-phase incoming line contact 41 and the outgoing line end of the multi-phase outgoing line contact 42 are arranged in up-down direction between corresponding phases, the outgoing line end of the multi-phase outgoing line contact 42 and the incoming line end of the multi-phase incoming line contact 41 are arranged in left-right direction between corresponding phases, and are stacked one by one on the side of the feeder busbar 31 of the corresponding phase. The same direction extension arrangement and left-right staggered arrangement of the incoming line contact 41 and the outgoing line contact 42 are compact in structure, save space, and also facilitate direct connection with the busbar, cancel the transfer busbar structure, and save the amount of busbar. Specifically, the three-phase incoming line contact 41 and the three-phase outgoing line contact 42 are arranged behind the switchgear 4, the incoming line contact 41 and the outgoing line contact 42 of the same phase circuit (corresponding phase) are arranged in left-right staggered arrangement and one-to-one correspondence. In some embodiments, the outgoing line contact 42 is arranged above the incoming line contact 41 of the same phase circuit. In some embodiments, as shown in FIG. 5, the outgoing line contact 42 is arranged on the left side of the incoming line contact 41 of the same phase circuit, that is, the outgoing line contact 42 is arranged on the left upper side of the corresponding incoming line contact 41; in other embodiments, the outgoing line contact 42 can be arranged below the incoming line contact 41 of the same phase circuit, and the outgoing line contact 42 can be arranged on the right side of the incoming line contact 41 of the same phase circuit. The three-phase incoming line contacts 41 can be arranged in the same height position in a row, or can be arranged in staggered arrangement in the up-down direction; the three-phase outgoing line contacts 42 can be arranged in the same height position in a row, or can be arranged in staggered arrangement in the up-down direction. The interval between each phase incoming line contact 41 and its adjacent incoming line contact 41 in the left-right direction, and the interval between each phase incoming line contact 41 and its corresponding outgoing line contact 42 in the left-right direction, are greater than the safe electrical clearance.

[0054] As shown in FIG. 5, the structure of the incoming line contact 41 and the outgoing line contact 42, one end of the incoming line contact 41 is an incoming line end for connecting with the first vertical busbar 21, the fixed end of the other end of the incoming line contact 41 is fixed on the body of the switch device 4, the fixed end and the incoming line end of the incoming line contact 41 are integrally connected in T shape; one end of the outgoing line contact 42 is an outgoing line end for connecting with the feeder busbar 31, the fixed end of the other end of the outgoing line contact 42 is fixed on the body of the switch device 4, the fixed end and the outgoing line end of the outgoing line contact 42 are integrally connected in L shape. Of course, the incoming line contact 41 can also be straight, L-shaped, etc. The fixed end of the outgoing line contact 42 can also be straight, T-shaped, etc. The fixed end of the incoming line contact 41 and the fixed end of the outgoing line contact 42 corresponding to the same phase circuit are arranged up and down, and the incoming line end of the incoming line contact 41 and the outgoing line end of the outgoing line contact 42 corresponding to the same phase circuit are arranged left and right.

[0055] Preferably, as shown in FIG. 3 and FIG. 5, the incoming line end of the incoming line contact 41 protrudes backward from the outgoing line end of the outgoing line contact 42 in the front-back direction, that is, the length of the incoming line end of the incoming line contact 41 is greater than the length of the outgoing line end of the outgoing line contact 42, and is stacked on the side of the first vertical busbar 21 of the corresponding phase. The first vertical busbar 21 is directly connected with the lengthened incoming line contact 41, without the need for an adapter busbar extending towards the incoming line contact 41, shortening the busbar path, thereby reducing the amount of busbar, reducing production costs, on the other hand, reducing the busbar adapter point, that is, reducing the number of heat points, which is beneficial to reduce the temperature rise of the cabinet 1. In addition, the outer surface of the incoming line contact 41 and the outgoing line contact 42 has a graphene plating layer. The graphene plating layer on the outer surface of the switch device 4 contact improves the conductivity and reduces the heat generation, thereby reducing the overall cabinet temperature rise. The graphene plating layer on the outer surface of the incoming line contact 41 and the outgoing line contact 42 of the present embodiment is made by electroplating graphene process, of course, other processes can also be used, it should be noted that the electroplating graphene process used in the present embodiment is prior art.

[0056] As shown in FIG. 1-4, the compact low-voltage cabinet of the present embodiment is used for installing a plurality of switch devices 4, and is provided with a plurality of feeder busbar modules 3, the plurality of switch devices 4 are arranged in sequence in the up-down direction, the plurality of feeder busbar modules 3 are arranged in sequence in the up-down direction and correspond to the plurality of switch devices 4, and each feeder busbar module 3 is located behind the corresponding switch device 4; each feeder busbar module 3 includes a multi-phase feeder busbar 31; the multi-phase first vertical busbar 21 extends to the rear of the plurality of switch devices 4 at the same time, and is connected with the incoming line contact 41 of the plurality of switch devices 4. The planes where the multi-phase first vertical busbar 21 and the multi-phase feeder busbar 31 are located are basically parallel to each other, and according to needs, there can be some bending, and the side edges can also have some bending protrusions, but the side surfaces corresponding to the connection positions of the incoming line contact 41 and the outgoing line contact 42 are basically parallel to each other.

[0057] The embodiment preferably provides three circuit breakers, and of course two, four or more can also be provided. The size of the cabinet 1 in the left-right direction, i.e. the width of the cabinet 1, is W, 400mm≤W≤600mm. The size W of the cabinet 1 in the left-right direction is preferably 400mm or 450mm or 500mm or 550mm or 600mm.

[0058] As shown in Figs. 3-4 and 6, the vertical busbar module 2 of the embodiment further comprises a plurality of phase second vertical busbars 22 equal in number to the first vertical busbars 21, the second vertical busbars 22 extending in the width direction along the front-rear direction and in the length direction along the up-down direction, the length of the second vertical busbars 22 being less than the length of the first vertical busbars 21, the second vertical busbars 22 being arranged in layers with the current start end of the corresponding phase first vertical busbar 21 spaced apart to form a mounting gap 23, and the corresponding incoming line contact 41 being disposed in the mounting gap 23. It should be noted that one end of the vertical busbar module 2 connected to the power supply device is the current start end (i.e. the top end as shown in Figs. 3-4 and 6). Since the current start end has the largest current, after the electrical energy is gradually distributed by the load, the current becomes smaller and smaller, and the current carried by the end is relatively the smallest, so the total cross section of the busbar at the end of the vertical busbar can be set smaller, and the second vertical busbar 22 is set shorter than the first vertical busbar 21, which conforms to the principle of economy and practicality and saves the number of busbars. Of course, according to actual needs, the second vertical busbar 22 can also be provided with the same length as the first vertical busbar 21. In addition, the vertical busbar module 2 of the embodiment can also be provided with a vertical busbar module shell, and the first vertical busbar 21 and the second vertical busbar 22 are arranged in the vertical busbar module shell to improve the electrical isolation performance between the vertical busbar module 2 and the feeder busbar module 3.

[0059] As shown in FIGS. 3-4 and 6, the vertical busbar module 2 of the present embodiment further comprises an insulating supporting plate 24 provided with busbar slots 241 and at least one first busbar clamp 25 provided with a plurality of first clamping slots 251, the current end (i.e. the bottom end as shown in FIGS. 3-4 and 6) of the first vertical busbar 21 is inserted into the busbar slots 241 of the insulating supporting plate 24, the side edges of each phase of the first vertical busbar 21 are inserted into the corresponding first clamping slots 251, and the side edges of each phase of the second vertical busbar 22 are also inserted into the corresponding first clamping slots 251. The busbar clamp clamps and fixes the busbar, ensures the busbar gap and the phase-to-phase distance, and prevents the busbar from shifting; the insulating supporting plate 24 supports the weight of the busbar and prevents the busbar from shifting. Specifically, the first busbar clamp 25 comprises two first clamping strips 252 and at least two first connecting rods 253, the two first clamping strips 252 are symmetrically arranged and correspondingly provided with the first clamping slots 251 on the opposite sides, and the two ends of the two first clamping strips 252 are connected by the first connecting rods 253 to form a frame-shaped space for accommodating the first vertical busbar 21 and the second vertical busbar 22, correspondingly, the two side edges of the first vertical busbar 21 or the second vertical busbar 22 are clamped to the first clamping slots 251 on the opposite sides of the two first clamping strips 252 to realize the clamping and fixing of the busbar by the busbar clamp. The gap between the two adjacent first vertical busbars 21 is also provided with the first connecting rod 253 to reinforce the first busbar clamp 25. The connection between the first connecting rod 253 and the first clamping strip 252 can be realized by inserting the two ends of the first connecting rod 253 into the insertion holes of the two first clamping strips 252.

[0060] As shown in FIGS. 3-4 and 7, the feeder busbar module 3 of the present embodiment further comprises at least one second busbar clamp 32 provided with a plurality of second clamping slots 321, and the side edges of each phase of the feeder busbar 31 are inserted into the corresponding second clamping slots 321. The second busbar clamp 32 supports the weight of the busbar, ensures the busbar gap and the phase-to-phase distance, and prevents the busbar from shifting. The second busbar clamp 32 comprises two second clamping strips 322 and at least two second connecting rods 323, the two second clamping strips 322 are symmetrically arranged and correspondingly provided with the second clamping slots 321 on the opposite sides, and the two ends of the two second clamping strips 322 are connected by the second connecting rods 323 to form a frame-shaped space for accommodating each phase of the feeder busbar 31, correspondingly, the two side edges of the feeder busbar 31 are clamped to the second clamping slots 321 on the opposite sides of the two second clamping strips 322 to realize the clamping and fixing of the busbar by the busbar clamp. The gap between the two adjacent feeder busbars 31 is also provided with the second connecting rod 323 to reinforce the second busbar clamp 32. The connection between the second connecting rod 323 and the second clamping strip 322 can be realized by inserting the two ends of the second connecting rod 323 into the insertion holes of the two second clamping strips 322.

[0061] As shown in FIG. 3-4 and FIG. 7, the cable connection hole is provided on the current end of the feeding busbar 31 away from the outgoing contact 42, which cooperates with the cable fixing bolt 33 to fix the cable. The cable is fixed by screwing the cable fixing bolt in the cable connection hole, so as to deliver electric energy to the next level of electrical equipment. The feeding busbar module 3 further comprises a current transformer 34 for detecting the current condition of the feeding busbar 31 in operation. Further, the current transformer 34 is provided in multiple, and each current transformer 34 is in the form of a ring structure, which is sleeved on the single-phase feeding busbar 31, and adjacent two current transformers 34 are arranged in staggered manner in the front-rear direction. Preferably, as shown in FIG. 7, the current transformer 34 is provided in three, and the two current transformers 34 on the two sides are arranged in a row in front, and the current transformer 34 in the middle is arranged in the rear. The staggered arrangement of the current transformer 34 reduces the arrangement gap of the feeding busbar 31, and the layout is compact, saving the occupied space.

[0062] In one specific embodiment, the incoming end of the incoming contact 41 is laminated on the side surface of the first vertical busbar 21 of the corresponding phase, and is fixed by the incoming fixing bolt 43, wherein the incoming end of the incoming contact 41 of the switch device 4 arranged opposite to the current start end of the first vertical busbar 21 is arranged in the installation gap 23 between the first vertical busbar 214 and the second vertical busbar 22 of the corresponding phase, and is fixed by the incoming fixing bolt 43. The multi-phase first vertical busbar 21 comprises the A-phase first vertical busbar 211, the B-phase first vertical busbar 212, the C-phase first vertical busbar 213 and the N-phase first vertical busbar 214 arranged in sequence and spaced apart in the left-right direction, the multi-phase second vertical busbar 22 comprises the A-phase second vertical busbar 221, the B-phase first vertical busbar 222, the C-phase second vertical busbar 223 and the N-phase second vertical busbar 224 arranged in sequence and spaced apart in the left-right direction, and the multi-phase incoming contact 41 comprises the A-phase incoming contact 411, the B-phase incoming contact 412 and the C-phase incoming contact 413 arranged in sequence and spaced apart in the left-right direction. The outgoing end of the outgoing contact 42 is laminated on the side surface of the feeding busbar 31 of the corresponding phase, and is fixed by the outgoing fixing bolt 44, the multi-phase feeding busbar 31 comprises the A-phase feeding busbar 311, the B-phase feeding busbar 312, the C-phase feeding busbar 313 and the N-phase feeding busbar 314 arranged in sequence and spaced apart in the left-right direction, and the multi-phase outgoing contact 42 comprises the A-phase outgoing contact 421, the B-phase outgoing contact 422 and the C-phase outgoing contact 423 arranged in sequence and spaced apart in the left-right direction. The N-phase feeding busbar 314 is laminated on the side surface of the N-phase first vertical busbar 214, and is fixed by the N-phase fixing bolt 35.

[0063] As shown in FIGS. 8-10, the busbar fixing mode of the vertical busbar module 2 and / or the feeder busbar module 3 also has various embodiments. In one preferred embodiment, the vertical busbar module 2 and / or the feeder busbar module 3 of the present embodiment includes a busbar fixing device, which includes a third busbar clamp 5 and a fixing member 6. The third busbar clamp 5 is provided with a fixing channel 51, and the inner side wall of the fixing channel 51 is provided with a plurality of clamping members 52 in the height direction of the fixing channel 51. The fixing member 6 includes a fixing portion 61 and first clamping portions 62 provided on the opposite sides of the fixing portion 61. The fixing portion 61 is located in the fixing channel 51 and can move in the height direction of the fixing channel 51, and the first clamping portions 62 can be clamped to the corresponding clamping members 52.

[0064] Specifically, the height direction of the fixing channel 51 is the AB direction in the drawing, and the width direction of the fixing channel 51 is the CD direction in the drawing. The third busbar clamp 5 has a fixing channel 51 for fixing the busbar of the vertical busbar module 2 or the feeder busbar module 3. When the third busbar clamp 5 is used to fix the busbar (including the first vertical busbar 21 and the second vertical busbar 22) of the vertical busbar module 2, the height direction of the fixing channel 51 is the front-rear direction in FIG. 4, i.e., the width direction of the busbar of the vertical busbar module 2, and the width direction of the fixing channel 51 is the left-right direction in FIG. 4, i.e., the thickness direction of the busbar of the vertical busbar module 2. When the third busbar clamp 5 is used to fix the busbar (i.e., the feeder busbar 31) of the feeder busbar module 3, the height direction of the fixing channel 51 is the up-down direction in FIG. 4, i.e., the width direction of the busbar of the feeder busbar module 3, and the width direction of the fixing channel 51 is the left-right direction in FIG. 4, i.e., the thickness direction of the busbar of the feeder busbar module 3. The busbar of the vertical busbar module 2 or the feeder busbar module 3 has excellent conductivity as a conductor, and the thinnest thickness is only 3 mm. The improved ultra-thin structure increases the surface area while greatly reducing the cross-sectional area while ensuring the current-carrying capacity. The two side walls of the fixing channel 51 are each provided with a plurality of clamping members 52, which form a sawtooth structure to ensure the structural strength of the third busbar clamp 5 while not damaging the integrity of the third busbar clamp 5. The fixing member 6 is made of high-strength insulating materials, such as high-molecular materials such as polyethylene and polypropylene, and non-metallic materials such as glass and ceramic. The fixing member 6 has high strength, so that after the current is turned on, the fixing member 6 itself will not loosen and fall off. At the same time, the fixing member 6 has a certain plasticity, which ensures that the fixing member 6 can be smoothly clamped into the third busbar clamp 5. The opposite sides of the fixing portion 61 are each provided with a first clamping portion 62, which is an elastic structure and is integrally formed with the fixing portion 61.

[0065] The fixed part 61 is placed in the fixed channel 51 and can move along the height direction of the fixed channel 51. After adjusting the position of the fixed part 61 in the fixed channel 51, the fixed part 61 is located at the top end of the third bus bar clamp 5. The first clamping part 62 on both sides is pressed by hand or tool, and the fixed part 61 slides up and down in the fixed channel 51 along the height direction of the third bus bar clamp 5. When the fixed part 61 abuts against the bus bar of the vertical busbar module 2 or the feeder busbar module 3, the first clamping part 62 is loosened, the first clamping part 62 clamps the corresponding clamping piece 52 and is fixed relative to the third bus bar clamp 5, so as to fix the bus bar of the vertical busbar module 2 or the feeder busbar module 3 in the height direction, and the installation stability is high. Adjusting the position of the fixed part 61 can be suitable for the installation of the bus bar of the vertical busbar module 2 or the feeder busbar module 3 with different heights, improve the versatility of the fixing part 6, reduce the number of third bus bar clamps 5, reduce the mold opening cost, and thus reduce the cost of the whole fixing device. Alternatively, for the bus bar of the vertical busbar module 2 or the feeder busbar module 3 with different heights, in addition to the above-mentioned change of the installation position of the fixing part 6, the number of fixing parts 6 can also be changed to match the installation of the bus bar of the vertical busbar module 2 or the feeder busbar module 3 with different heights.

[0066] Further, referring to FIG. 8, the bus bar fixing device further comprises a clamping part 7 which is detachably connected to the fixed part 61 and is used for clamping the bus bar of the vertical busbar module 2 or the feeder busbar module 3 in the width direction of the fixed channel 51. Specifically, the clamping part 7 is detachably connected to the fixed part 61. In some embodiments, when the thickness of the bus bar of the vertical busbar module 2 or the feeder busbar module 3 is slightly smaller than the width of the fixed channel 51, the clamping part 7 is detached from the fixing part 6, and the bus bar of the vertical busbar module 2 or the feeder busbar module 3 can be fixed only under the action of the fixing part 6. When the thickness of the bus bar of the vertical busbar module 2 or the feeder busbar module 3 is much smaller than the width of the fixed channel 51, the clamping part 7 is installed on the fixed part 61, and the two sides of the bus bar of the vertical busbar module 2 or the feeder busbar module 3 are clamped under the action of the clamping part 7. Different clamping parts 7 are replaced for fixing the bus bar of the vertical busbar module 2 or the feeder busbar module 3 with different thicknesses, which further improves the versatility of the fixing part 6, greatly reduces the number of third bus bar clamps 5, reduces the mold opening cost, and thus reduces the cost of the whole fixing device.

[0067] Further, referring to FIG. 8, the clamping piece 7 comprises a clamping portion 71, a sliding portion 72 and a third clamping portion 73. The opposite sides of the clamping portion 71 are respectively provided with the third clamping portion 73, which can be clamped to the corresponding clamping piece 52. The sliding portion 72 is arranged at one end of the clamping portion 71. The end of the fixing portion 61 of the fixing piece 6 is provided with a sliding groove 611. The sliding portion 72 is movably inserted into the sliding groove 611. The other end of the clamping portion 71 is provided with a clamping groove 711. The groove width of the clamping groove 711 is matched with the width of the busbar of the vertical busbar module 2 or the power feeding busbar module 3. The busbar of the vertical busbar module 2 or the power feeding busbar module 3 is inserted and clamped into the clamping groove 711. Specifically, the third clamping portion 73 is of an elastic structure and is integrally formed with the clamping portion 71. In some embodiments, the longitudinal cross-sectional shape of the sliding groove 611 can be T-shaped structure. The sliding portion 72 matched therewith is also T-shaped structure. The sliding portion 72 is slidably connected with the sliding groove 611 of the fixing portion 61, so that the clamping piece 7 is fixedly installed with the fixing piece 6. According to the matching requirement of the thickness of the busbar of the vertical busbar module 2 or the power feeding busbar module 3 and the width of the fixing channel 51, the clamping piece 7 is disassembled or installed to clamp and fix the busbar of the vertical busbar module 2 or the power feeding busbar module 3. The clamping portion 71 is provided with the clamping groove 711. The width of the clamping groove 711 corresponds to the thickness of the busbar of the vertical busbar module 2 or the power feeding busbar module 3, i.e. according to the thickness of the busbar of different vertical busbar modules 2 or power feeding busbar modules 3, the corresponding clamping piece 7 matched with the clamping groove 711 is selected. The sliding portion 72 is inserted into the sliding groove 611 of the fixing portion 61. Under the action of the clamping portion 71, the two sides of the busbar of the vertical busbar module 2 or the power feeding busbar module 3 are clamped and fixed. At the same time, the third clamping portion 73 on both sides of the clamping portion 71 is clamped in the corresponding clamping piece 52, which is used for clamping and fixing the busbar of the vertical busbar module 2 or the power feeding busbar module 3.

[0068] Further, referring to FIG. 9 and FIG. 11, the side wall of one end of the fixed channel 51 in the height direction is provided with a fixed groove 55 in a stepped structure, the fixed groove 55 is used for inserting one end of the busbar of the vertical busbar module 2 or the feeder busbar module 3, and the fixed part 6 or the clamping part 7 is used for connecting the other end of the busbar of the vertical busbar module 2 or the feeder busbar module 3. Specifically, the fixed groove 55 in a stepped structure is opened at the bottom of the third busbar clamp 5, when the thickness of the busbar of the vertical busbar module 2 or the feeder busbar module 3 is less than the width of the fixed channel 51, one end of the busbar of the vertical busbar module 2 or the feeder busbar module 3 is inserted into the fixed groove 55, and the other end of the busbar of the vertical busbar module 2 or the feeder busbar module 3 is clamped and fixed by the clamping part 7. For the busbar of the vertical busbar module 2 or the feeder busbar module 3 with different thicknesses, the fixed groove 55 has a plurality of stepped grooves with different widths combined to adapt to the installation of busbars of the vertical busbar module 2 or the feeder busbar module 3 with different thicknesses, reduce the number of third busbar clamps 5 and mold opening cost, and thus reduce the cost of the entire fixing device.

[0069] Further, referring to FIG. 12 and FIG. 13, the busbar fixing device further comprises a spacer 9, the spacer 9 is clamped between the busbar of the vertical busbar module 2 or the feeder busbar module 3 and the inner side wall of the fixing channel 51 in the width direction of the fixing channel 51, the spacer 9 is provided with a fourth clamping part 91, and the fourth clamping part 91 is clamped and matched with the clamping piece 52. Specifically, the fourth clamping part 91 is provided with a plurality of fourth clamping parts 91, the plurality of fourth clamping parts 91 form a sawtooth structure, and the fourth clamping part 91 and the opening direction of the clamping piece 52 are oppositely arranged, so that the fourth clamping part 91 can be clamped and matched with the clamping piece 52. The spacer 9 is provided with a boss 92 and a buckle 93, the number of the buckle 93 is at least two, the two buckles 93 are respectively arranged at the upper and lower edges of the spacer 9 in the height direction of the fixing channel 51, and the boss 92 is located between the two buckles 93 of the spacer 9. The boss 92 can increase the strength of the whole spacer 9, the inner side wall of the fixing channel 51 is provided with a mounting hole 53 and a connecting groove 54, the connecting groove 54 is communicated between the adjacent two clamping pieces 52 in the width direction of the fixing channel 51, the number of the connecting groove 54 is two, the two connecting grooves 54 are respectively corresponding to the two buckles 93 on the spacer 9 one by one, and the mounting hole 53 is located between the two connecting grooves 54 and corresponds to the boss 92. The boss 92 is inserted into the mounting hole 53, and the buckle 93 is clamped in the connecting groove 54, so that the installation of the spacer 9 is more reliable. According to the thickness of the busbar of the vertical busbar module 2 or the feeder busbar module 3, whether to install the spacer 9 and select the spacer 9 of different sizes are selected, when the thickness of the busbar of the vertical busbar module 2 or the feeder busbar module 3 is equal to the width of the fixing channel 51, the spacer 9 and the clamping piece 7 are not needed, and only the busbar of the vertical busbar module 2 or the feeder busbar module 3 is fixed and clamped by the action of the fixing piece 6. When the thickness of the busbar of the vertical busbar module 2 or the feeder busbar module 3 is less than the width of the fixing channel 51, the clamping piece 7 and the stepped structure fixing groove 55 are used for clamping the busbar of the vertical busbar module 2 or the feeder busbar module 3 in the vertical direction, and at the same time, the spacer 9 is fixed between the inner side wall of the fixing channel 51 and the side wall of the busbar of the vertical busbar module 2 or the feeder busbar module 3 by the action that the boss 92 is inserted into the mounting hole 53 and the buckle 93 is clamped in the connecting groove 54, so as to fix and clamp the busbar of the vertical busbar module 2 or the feeder busbar module 3. Preferably, a plurality of spacers 9 are arranged between the busbar of the vertical busbar module 2 or the feeder busbar module 3 and the inner side wall of the fixing channel 51 in the height direction of the fixing channel, so as to further improve the stability of the busbar of the vertical busbar module 2 or the feeder busbar module 3 relative to the third busbar clamp 5. By replacing the spacer 9 and the clamping piece 7 of different sizes, the busbar of the vertical busbar module 2 or the feeder busbar module 3 of different thicknesses is fixed, and the number and mold opening cost of the third busbar clamp 5 are greatly reduced.

[0070] Further, referring to FIG. 13 and FIG. 14, the number of the fixing channels 51 is multiple, and the multiple fixing channels 51 are distributed in a matrix. Specifically, the third bus bar clamp 5 can fix the bus bars of the vertical bus module 2 or the feeder bus module 3 with different heights and different thicknesses through the multiple fixing channels 51, and is suitable for a wide range of applications.

[0071] Further, referring to FIG. 9, the material of the third bus bar clamp 5 is a piezochromic material. When the third bus bar clamp 5 is damaged, such as cracking, the third bus bar clamp 5 will change color obviously, which facilitates the timely discovery of the damaged position of the third bus bar clamp 5 and facilitates timely maintenance or replacement. Alternatively, materials that can satisfy high strength, high temperature resistance, and obvious color change at the damaged position can be used.

[0072] As shown in FIG. 15-FIG. 16, another preferred way of fixing the bus bars of the vertical bus module 2 and / or the feeder bus module 3 is that the vertical bus module 2 and / or the feeder bus module 3 of the present embodiment includes a fourth bus bar clamp 8, which includes a bus bar clamp body 81 and a protruding structure 82. The bus bar clamp body 81 is provided with a bus bar through hole 811, and the hole wall of the bus bar through hole 811 is provided with multiple protruding structures 82 in the first direction X and / or the second direction Y. The bus bar through hole 811 is used for the vertical bus module 2 or the feeder bus module 3 to pass through the bus bar, and the multiple protruding structures 82 are used for abutting with the bus bar of the vertical bus module 2 or the feeder bus module 3. The bus bar clamp body 81 is an insulating piece, and the first direction X and the second direction Y are perpendicular. When the bus bar of the vertical bus module 2 or the feeder bus module 3 is inserted into the bus bar through hole 811, the outer peripheral wall of the bus bar of the vertical bus module 2 or the feeder bus module 3 abuts with the protruding structure 82 in the bus bar through hole 811, which reduces the abutting area between the bus bar of the vertical bus module 2 or the feeder bus module 3 and the inner peripheral wall of the bus bar through hole 811, and further facilitates the heat dissipation of the bus bar of the vertical bus module 2 or the feeder bus module 3.

[0073] Specifically, when the bus bar is inserted into the bus bar through hole, the first direction X is consistent with the thickness direction of the bus bar, and the second direction Y is consistent with the width direction of the bus bar. That is, when the fourth bus bar clamp 8 is used to fix the bus bars of the vertical bus module 2 (including the first vertical bus 21 and the second vertical bus 22), the first direction X is the left-right direction in FIG. 4, that is, the thickness direction of the bus bar of the vertical bus module 2, and the second direction Y is the front-back direction in FIG. 4, that is, the width direction of the bus bar of the vertical bus module 2; when the fourth bus bar clamp 8 is used to fix the bus bar of the feeder bus module 3 (i.e. the feeder bus 31), the first direction X is the left-right direction in FIG. 4, that is, the thickness direction of the bus bar of the feeder bus module 3, and the second direction Y is the up-down direction in FIG. 4, that is, the width direction of the bus bar of the feeder bus module 3.

[0074] Optionally, the plurality of protruding structures 82 are detachably arranged on the two side walls of the busbar perforation 811 along the first direction X. In the embodiment, the protruding structures 82 are detachably connected, and thus, according to the thickness of the busbar of the vertical busbar module 2 or the feeder busbar module 3, different thicknesses of the protruding structures 82 can be selected, so that the fourth busbar clamp can be applied to busbars of different thickness specifications of the vertical busbar module 2 or the feeder busbar module 3. Specifically, the protruding structures 82 are made of insulating materials.

[0075] Optionally, the two side walls of the busbar perforation 811 along the first direction X are respectively provided with limiting holes at intervals; the protruding structure 82 comprises an adjusting column 821 and a protruding platform 822, one end of the adjusting column 821 is connected with the protruding platform 822, the other end of the adjusting column 821 is correspondingly inserted into the plurality of limiting holes, and the adjusting column 821 is screwed with the limiting hole. In the embodiment, since the protruding structure 82 is arranged on the two side walls of the busbar perforation 811 along the first direction X, by adjusting the relative position of the adjusting column 821 along the axial direction of the limiting hole and the busbar clamp body 81, the spacing of the protruding structure 82 on the two side walls of the busbar perforation 811 along the first direction X can be adjusted, so as to adapt to the installation and fixation of busbars of different thicknesses of the vertical busbar module 2 or the feeder busbar module 3. Specifically, the limiting hole can be a threaded hole, and the adjusting column 821 can be a threaded column, by screwing the adjusting column 821 in the adjusting hole, the relative position of the protruding platform 822 and the busbar clamp body 81 can be adjusted. Specifically, the protruding platform 822 can be made of insulating rubber material, which can improve the pressure and friction force of the protruding platform 822 on the busbar of the vertical busbar module 2 or the feeder busbar module 3. In other embodiments, the protruding platform 822 can also be made of insulating hard plastic material.

[0076] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when in use, and are only for the convenience of description, and cannot be understood as indicating that the devices or elements referred to must have a specific orientation, therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating relative importance.

[0077] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can also be made, which should be regarded as falling within the protection scope of the present application.

Claims

1. A compact low-voltage cabinet for mounting a plurality of switching devices (4), comprising a cabinet body (1), a vertical busbar module (2) comprising a multiphase first vertical busbar (21), and a feeder busbar module (3) comprising a multiphase feeder busbar (31), the switching devices (4) being provided with a multiphase incoming line contact (41) for corresponding connection to the multiphase first vertical busbar (21) and a multiphase outgoing line contact (42) for corresponding connection to the multiphase feeder busbar (31) behind the switching devices (4), characterized in that: The vertical bus module (2) and the feeder bus module (3) are arranged behind the switchgear (4), the width direction of the first vertical bus (21) extends along the front-rear direction and the length direction extends along the up-down direction, the width direction of the feeder bus (31) extends along the up-down direction and the length direction extends along the front-rear direction, and the multi-phase first vertical bus (21) and the multi-phase feeder bus (31) are arranged alternately in the left-right direction.

2. The compact low voltage cabinet of claim 1, wherein: The width direction of the incoming line contact (41) extends along the up-down direction and the length direction extends along the front-rear direction, the width direction of the outgoing line contact (42) extends along the up-down direction and the length direction extends along the front-rear direction, the incoming line end of the multi-phase incoming line contact (41) and the outgoing line end of the multi-phase outgoing line contact (42) are arranged alternately in the up-down direction, and the outgoing line end of the multi-phase outgoing line contact (42) is arranged staggered in the left-right direction with the incoming line end of the multi-phase incoming line contact (41) and is stacked on the side of the corresponding phase feeder bus (31).

3. The compact low voltage cabinet of claim 2, wherein: The incoming line end of the incoming line contact (41) protrudes backward in the front-rear direction from the outgoing line end of the outgoing line contact (42) and is stacked on the side of the corresponding phase first vertical bus (21).

4. The compact low voltage cabinet of claim 1, wherein: The vertical bus module (2) further comprises a multi-phase second vertical bus (22) with the same number of phases as the first vertical bus (21), the width direction of the second vertical bus (22) extends along the front-rear direction and the length direction extends along the up-down direction, the length of the second vertical bus (22) is smaller than the length of the first vertical bus (21), the second vertical bus (22) is arranged staggered with the current start end of the corresponding phase first vertical bus (21) to form a mounting gap (23), and the corresponding incoming line contact (41) is arranged in the mounting gap (23).

5. The compact low voltage cabinet of claim 1, wherein: A plurality of switchgears (4) and a plurality of feeder bus modules (3) are arranged, the plurality of switchgears (4) are arranged in sequence in the up-down direction, and the plurality of feeder bus modules (3) are arranged in sequence in the up-down direction and correspond to the plurality of switchgears (4).

6. The compact low voltage cabinet of claim 1, wherein: The vertical bus module (2) further comprises an insulating supporting plate (24) and at least one first bus clamp (25), the insulating supporting plate (24) is provided with a bus slot (241), the first bus clamp (25) is provided with a plurality of first clamping grooves (251), the current end of the first vertical bus (21) is arranged in the bus slot (241), and the side edge of each phase first vertical bus (21) is arranged in the corresponding first clamping groove (251). And / or, the feeder bus module (3) further comprises at least one second bus clamp (32), the second bus clamp (32) is provided with a plurality of second clamping grooves (321), and the side edge of each phase feeder bus (31) is arranged in the corresponding second clamping groove (321).

7. The compact low voltage cabinet of claim 1, wherein: The incoming line end of the incoming line contact (41) is laminated on the side of the first vertical busbar (21) of the corresponding phase, and is fixed by an incoming line fixing bolt (43), the multi-phase first vertical busbar (21) includes A-phase first vertical busbar (211), B-phase first vertical busbar (212), C-phase first vertical busbar (213) and N-phase first vertical busbar (214) arranged in sequence and spaced in the left-right direction, and the multi-phase incoming line contact (41) includes A-phase incoming line contact (411), B-phase incoming line contact (412) and C-phase incoming line contact (413) arranged in sequence and spaced in the left-right direction; the outgoing line end of the outgoing line contact (42) is laminated on the side of the feeder busbar (31) of the corresponding phase, and is fixed by an outgoing line fixing bolt (44), the multi-phase feeder busbar (31) includes A-phase feeder busbar (311), B-phase feeder busbar (312), C-phase feeder busbar (313) and N-phase feeder busbar (314) arranged in sequence and spaced in the left-right direction, and the multi-phase outgoing line contact (42) includes A-phase outgoing line contact (421), B-phase outgoing line contact (422) and C-phase outgoing line contact (423) arranged in sequence and spaced in the left-right direction.

8. The compact low voltage cabinet of claim 7, wherein: The N-phase feeder busbar (314) is laminated on the side of the N-phase first vertical busbar (214) and is fixed by an N-phase fixing bolt (35).

9. The compact low voltage cabinet according to any of claims 1-8, characterized in that: The cabinet body (1) has a size W in the left-right direction, and 400mm≤W≤600mm; the incoming line contact (41) and the outgoing line contact (42) have a graphene plating layer on the outer surface.

10. The compact low voltage cabinet of claim 1, wherein: The vertical busbar module (2) and / or the feeder busbar module (3) include a busbar fixing device, and the busbar fixing device includes: A third busbar clamp (5) is provided with a fixing channel (51), and a plurality of clamping pieces (52) are arranged on the inner side wall of the fixing channel (51) in the height direction of the fixing channel (51); A fixing piece (6) includes a fixing portion (61) and a first clamping portion (62) arranged on the opposite sides of the fixing portion (61), the fixing portion (61) is located in the fixing channel (51) and can move in the height direction of the fixing channel (51), and the first clamping portion (62) can be clamped to the corresponding clamping piece (52).

11. The compact low voltage cabinet of claim 10, wherein: The busbar fixing device further includes a clamping piece (7), which is detachably connected to the fixing portion (61), and is used for clamping the busbar of the vertical busbar module (2) or the feeder busbar module (3) in the width direction of the fixing channel (51).

12. The compact low voltage cabinet of claim 11, wherein: The clamping part (7) comprises a clamping part (71), a sliding part (72) and a third clamping part (73), the opposite sides of the clamping part (71) are respectively provided with the third clamping part (73), the third clamping part (73) can be clamped in the corresponding clamping part (52), the sliding part (72) is arranged at one end of the clamping part (71), the end of the fixed part (61) is provided with a sliding groove (611), the sliding part (72) is inserted into the sliding groove (611), the other end of the clamping part (71) is provided with a clamping groove (711), the groove width of the clamping groove (711) is matched with the width of the busbar of the vertical busbar module (2) or the feeder busbar module (3), and the busbar of the vertical busbar module (2) or the feeder busbar module (3) is inserted into the clamping groove (711).

13. The compact low voltage cabinet of claim 10, wherein: The busbar fixing device further comprises a pad (9), the pad (9) is clamped between the busbar of the vertical busbar module (2) or the feeder busbar module (3) and the inner side wall of the fixed channel (51) in the width direction of the fixed channel (51), the pad (9) is provided with a fourth clamping part (91), and the fourth clamping part (91) is clamped in cooperation with the clamping part (52).

14. The compact low voltage cabinet of claim 1, wherein: The vertical busbar module (2) and / or the feeder busbar module (3) comprises a fourth busbar clamp (8), the fourth busbar clamp (8) comprises a busbar clamp body (81) and a busbar perforation (811) arranged on the busbar clamp body (81), the busbar clamp further comprises a protruding structure (82), a plurality of protruding structures (82) are arranged at intervals on the hole wall of the busbar perforation (811) along a first direction (X) and / or a second direction (Y), the busbar perforation (811) is used for the busbar of the vertical busbar module (2) or the feeder busbar module (3) to pass through, and the plurality of protruding structures (82) are used for abutting against the busbar of the vertical busbar module (2) or the feeder busbar module (3).

15. The compact low voltage cabinet of claim 14, wherein: The protruding structure (82) is detachably arranged on the hole wall of the busbar perforation (811); The hole wall of the busbar perforation (811) is provided with a limiting hole; The protruding structure (82) comprises an adjusting column (821) and a protruding platform (822), one end of the adjusting column (821) is connected with the protruding platform (822), the other end of the adjusting column (821) is inserted into the limiting hole, and the adjusting column (821) is screwed with the limiting hole.

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