Compact low-voltage cabinet

Abstract

The compact low-voltage cabinet comprises a cabinet body, a vertical bus module and a feed bus module, the vertical bus module comprises a multi-phase first vertical bus, and the feed bus module comprises a multi-phase feed bus. A multi-phase inlet wire contact used for being correspondingly connected with the multi-phase first vertical bus and a multi-phase outlet wire contact used for being correspondingly connected with the multi-phase feed bus are arranged behind the switch device, and the vertical bus module and the feed bus module are arranged behind the switch device. The width direction of the first vertical buses extends in the front-back direction, the length direction of the first vertical buses extends in the up-down direction, the width direction of the feed buses extends in the up-down direction, the length direction of the feed buses extends in the front-back direction, and the multi-phase first vertical buses and the multi-phase feed buses are alternately arranged in the left-right direction. The compact low-voltage cabinet is used for installing the switch equipment, and the vertical bus modules and the feed bus modules are alternately arranged, so that the vertical bus modules and the feed bus modules can be uniformly arranged behind the switch equipment, a unique staggered compact bus system is formed, and the occupied space is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of low-voltage electrical apparatus, in particular to a compact low-voltage cabinet. BACKGROUND

[0002] At present, the main problem of the low-voltage complete cabinet in the market is that the multi-circuit feeder cabinet scheme generally has the disadvantages of large cabinet size, large amount of busbars and poor heat dissipation. The traditional scheme: the circuit breaker contacts are symmetrical and equal in length. The vertical bus is arranged 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 contacts, the bus connection path is long, which is called the side vertical bus scheme. The feeder bus is connected to the circuit breaker contacts, and the feeder bus has a cable connection hole at the end, which is fixed by a bolt 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

[0003] The present application aims to overcome at least one of the defects of the prior art and provide a compact low-voltage cabinet.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0005] The compact low-voltage cabinet is used for installing multiple switch devices, and includes a cabinet body, a vertical bus module and a feeder bus module. The vertical bus module includes a multi-phase first vertical bus, and the feeder bus module includes a multi-phase feeder bus. The rear of the switch device is provided with multi-phase incoming line contacts for corresponding connection with the multi-phase first vertical bus and multi-phase outgoing line contacts 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.

[0006] Optionally, the width direction of the incoming line end of the incoming line contact for connecting with the first vertical bus extends along the up-down direction and the length direction along the front-rear direction. The width direction of the outgoing line end of the outgoing line contact for connecting with the feeder bus extends along the up-down direction and the length direction along 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 one above another between corresponding phases. 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 staggered positions between corresponding phases in the left-right direction and are stacked one by one on the side surface of the corresponding phase of the feeder bus.

[0007] Optionally, the incoming line end of the incoming line contact protrudes backward in the front-back direction from the outgoing line end of the outgoing line contact and is stacked on the side of the first vertical busbar of the corresponding phase.

[0008] Optionally, the outer surfaces of the incoming line contact and the outgoing line contact are provided with graphene plating.

[0009] 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 and extended in the front-back direction as the width direction and in the up-down direction as the length direction, the length of the second vertical busbar is smaller than the length of the first vertical busbar, the second vertical busbar is arranged and stacked with the current start end of the corresponding first vertical busbar to form a mounting gap, and the corresponding incoming line contact is arranged in the mounting gap.

[0010] Optionally, a plurality of switch devices and a plurality of feeder busbar modules are provided, the plurality of switch devices are arranged in sequence in the up-down direction, and the plurality of feeder busbar modules are arranged in sequence in the up-down direction and correspond to the plurality of switch devices.

[0011] 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, and 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 edges of the first vertical busbar of each phase are inserted into the corresponding first clamping grooves.

[0012] Optionally, the feeder 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 edges of the feeder busbar of each phase are inserted into the corresponding second clamping grooves.

[0013] Optionally, the incoming line end of the incoming line contact is stacked on the side of the first vertical busbar of the corresponding phase and is fixed by an incoming line fixing bolt, the plurality of first vertical busbars comprise an A-phase first vertical busbar, a B-phase first vertical busbar, a C-phase first vertical busbar and an N-phase first vertical busbar arranged and spaced in sequence in the left-right direction, and the plurality of incoming line contacts comprise an A-phase incoming line contact, a B-phase incoming line contact and a C-phase incoming line contact arranged and spaced in sequence in the left-right direction; the outgoing line end of the outgoing line contact is stacked on the side of the feeder busbar of the corresponding phase and is fixed by an outgoing line fixing bolt, the plurality of feeder busbars comprise an A-phase feeder busbar, a B-phase feeder busbar, a C-phase feeder busbar and an N-phase feeder busbar arranged and spaced in sequence in the left-right direction, and the plurality of outgoing line contacts comprise an A-phase outgoing line contact, a B-phase outgoing line contact and a C-phase outgoing line contact arranged and spaced in sequence in the left-right direction.

[0014] Optionally, the N-phase feeder busbar is stacked on the side of the N-phase first vertical busbar and is fixed by an N-phase fixing bolt.

[0015] Optionally, the dimension of the cabinet in the left and right directions is W, 400mm≤W≤600mm.

[0016] Optionally, the dimension W of the cabinet in the left-right direction is 400 mm, 450 mm, 500 mm, 550 mm or 600 mm.

[0017] The compact low-voltage cabinet of the present invention is used for installing switchgear. By arranging vertical busbar modules and feeder busbar modules alternately, they can be uniformly arranged behind the switchgear to form a unique staggered compact busbar system. This system greatly reduces the space occupied by the busbars in the cabinet, solves the problem of traditional side vertical busbars occupying the width of the cabinet, saves space to the maximum extent, reduces the external dimensions of the low-voltage cabinet, and at the same time ensures that the two busbar modules can be electrically isolated by increasing the electrical gap and creepage distance.

[0018] In addition, the incoming contacts and outgoing contacts are extended in the same direction and arranged in a staggered manner to the left and right, which makes the structure compact and saves space. It also facilitates direct connection with the busbar, eliminates the transfer busbar structure, and saves busbar usage.

[0019] In addition, the first vertical busbar is directly connected to the extended incoming contact, and there is no need for a transfer busbar extending toward the incoming contact, which shortens the busbar path, thereby reducing the amount of busbar used and lowering production costs. On the other hand, it reduces the number of busbar transfer points, that is, reduces the number of heat points, which is beneficial to reducing the temperature rise of the cabinet.

[0020] In addition, setting the second vertical busbar to be shorter than the first vertical busbar conforms to the principle of economy and practicality and saves the number of busbars. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of the low-voltage cabinet of the present invention;

[0022] Figure 2 It is a three-dimensional diagram of the low-voltage cabinet of the present invention;

[0023] Figure 3 This is a one-view diagram of the switchgear, vertical busbar module, and feeder busbar module of the present invention;

[0024] Figure 4 This is another perspective view of the switchgear, vertical busbar module and feeder busbar module of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the switchgear of the present invention;

[0026] Figure 6 It is a structural diagram of the vertical busbar module of the present invention;

[0027] Figure 7is a structural schematic view of a feeding busbar module lacking N-phase feeding busbar of the present application;

[0028] Cabinet 1; panel 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; insulation supporting plate 24; busbar slot 241; first busbar clamp 25; first clamping groove 251; first clamping strip 252; first connecting rod 253; feeding busbar module 3; feeding busbar 31; A-phase feeding busbar 311; B-phase feeding busbar 312; C-phase feeding busbar 313; N-phase feeding 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; switch device 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. DETAILED DESCRIPTION

[0029] The embodiments of the compact low-voltage cabinet of the present application are further illustrated in the following description in conjunction with the accompanying drawings. The compact low-voltage cabinet of the present application is not limited to the description of the following embodiments.

[0030] As Figures 1-4As shown, the compact low-voltage cabinet of the embodiment is used for installing one or more switch devices 4, and includes a cabinet body 1, a vertical busbar module 2 including a multi-phase first vertical busbar 21, and a feeder busbar module 3 including a multi-phase feeder busbar 31. The switch 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 switch device 4. The width direction of the first vertical busbar 21 extends in the front-rear direction and the length direction extends in the up-down direction. The width direction of the feeder busbar 31 extends in the up-down direction and the length direction extends in the front-rear direction. The multi-phase first vertical busbar 21 and the multi-phase feeder busbar 31 are alternately arranged in the left-right direction. The compact low-voltage cabinet of the embodiment is used for installing the switch device 4. The vertical busbar module 2 and the feeder busbar module 3 are alternately arranged, which can be uniformly arranged behind the switch device 4, forming a unique staggered compact busbar system. The system greatly reduces the space occupied by the busbar in the cabinet body 1, solves the problem of the width of the traditional side vertical busbar occupying the cabinet body 1, maximizes the space saving, reduces the size of the low-voltage cabinet, and also ensures that the electrical clearance and creepage distance between the two busbar modules can be increased to achieve electrical isolation.

[0031] The low-voltage cabinet of the embodiment is a multi-circuit feeder cabinet. Electric energy is input from the vertical busbar module 2, transferred through the switch device 4, and finally distributed to the multi-circuit feeder busbar module 3. Of course, the low-voltage cabinet of the embodiment can also be a multi-circuit incoming line cabinet, an incoming line and feeder mixed cabinet, etc. The switch device shown in the 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 embodiment is based on the front panel 11 in the front, such as Figures 1-2 As shown, the height direction of the cabinet body 1 is the up-down direction, the width direction of the cabinet body 1 is the left-right direction, and the depth direction of the cabinet body 1 is the front-rear direction.

[0032] As shown, the height direction of the cabinet body 1 is the up-down direction, the width direction of the cabinet body 1 is the left-right direction, and the depth direction of the cabinet body 1 is the front-rear direction. Figure 5As shown, the incoming line contact 41 is arranged in the width direction of the incoming line end connected with the first vertical bus 21 extending in the up-down direction and the length direction, and the outgoing line contact 42 is arranged in the width direction of the outgoing line end connected with the feeder bus 31 extending in the up-down direction and the length 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 the up-down direction between corresponding phases, and 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 the left-right direction between corresponding phases and are stacked on the side of the feeder bus 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 facilitate direct connection with the bus, cancel the transfer bus structure, and save the amount of bus. 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 the left-right staggered manner 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 Figure 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 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 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.

[0033] As shown in Figure 5As shown in the drawings, the structure of the incoming line contact 41 and the outgoing line contact 42 of the embodiment, 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, and 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, and 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., and 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 of the same phase circuit are arranged in correspondence on the upper and lower sides, and the incoming line end of the incoming line contact 41 and the outgoing line end of the outgoing line contact 42 of the same phase circuit are arranged in correspondence on the left and right sides.

[0034] Preferably, as shown in the drawings, Figure 3 and Figure 5 As shown in the drawings, the incoming line end of the incoming line contact 41 protrudes backward in the front-back direction from the outgoing line end of the outgoing line contact 42, 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 the incoming line end of the incoming line contact 41 is stacked on the side surface 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, thereby shortening the busbar path, reducing the amount of busbar used, and reducing production costs. On the other hand, the number of busbar adapter points is also reduced, that is, the number of heat generation points is reduced, which is beneficial to reducing the temperature rise of the cabinet 1. In addition, the outer surfaces of the incoming line contact 41 and the outgoing line contact 42 have a graphene plating layer. The graphene plating layer on the outer surface of the switch device 4 contact improves the electrical conductivity and reduces the amount of heat generated, 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 embodiment is made by a graphene electroplating process, of course, other processes can also be used. It should be noted that the graphene electroplating process used in the embodiment is prior art.

[0035] As shown in the drawings, Figures 1-4 The compact low-voltage cabinet of the embodiment is used for installing multiple switch devices 4 and is provided with multiple feeder busbar modules 3. The multiple switch devices 4 are arranged in sequence in the up-down direction, the multiple feeder busbar modules 3 are arranged in sequence in the up-down direction and are arranged in correspondence with the multiple 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 multiple switch devices 4 and is connected with the incoming line contacts 41 of the multiple switch devices 4. The planes on which the multi-phase first vertical busbar 21 and the multi-phase feeder busbar 31 are located are substantially parallel to each other, and according to needs, there can be some bending and some bent protrusions on the side edges, but the side surfaces corresponding to the connection positions of the incoming line contacts 41 and the outgoing line contacts 42 are substantially parallel to each other.

[0036] 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.

[0037] As shown in Figures 3-4 and Figure 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 are arranged in the front-rear direction in the width direction and in the up-down direction in the length direction, the length of the second vertical busbars 22 is less than the length of the first vertical busbars 21, the second vertical busbars 22 are arranged in layers with the current start end of the corresponding phase first vertical busbar 21 to form a mounting gap 23, and the corresponding incoming line contact 41 is arranged 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 Figures 3-4 and Figure 6 The current start end has the largest current, and 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 to be 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 arranged in 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.

[0038] As shown in Figures 3-4 and Figure 6 The vertical busbar module 2 of the embodiment further comprises an insulating supporting plate 24 and at least one first busbar clamp 25, the insulating supporting plate 24 is provided with a busbar slot 241, and the first busbar clamp 25 is provided with a plurality of first clamping grooves 251, and the current end of the first vertical busbar 21 (i.e. the bottom end as shown in Figures 3-4 and Figure 6The bottom end of the bus is inserted into the bus slot 241 of the insulating support plate 24, the side edges of the first vertical bus 21 are inserted into the corresponding first clamping slot 251, and the side edges of the second vertical bus 22 are also inserted into the corresponding first clamping slot 251. The bus clamp clamps and fixes the bus, ensures the bus gap and the phase-to-phase distance, and prevents the bus from shifting; the insulating support plate 24 supports the weight of the bus and prevents the bus from shifting. Specifically, the first bus clamp 25 includes two first clamping strips 252 and at least two first connecting rods 253, the two first clamping strips 252 are symmetrically arranged, corresponding first clamping slots 251 are arranged on the opposite sides, and the two ends of the two first clamping strips 252 are connected by the first connecting rod 253 to form a frame-shaped space for accommodating the first vertical bus 21 and the second vertical bus 22. Correspondingly, the two side edges of the first vertical bus 21 or the second vertical bus 22 are clamped in the first clamping slots 251 on the opposite sides of the two first clamping strips 252, so as to clamp and fix the bus by the bus clamp. The gap between the two adjacent first vertical buses 21 is also provided with a first connecting rod 253 to reinforce the first bus clamp 25. The connection between the first connecting rod 253 and the first clamping strip 252 can be achieved by inserting the two ends of the first connecting rod 253 into the insertion holes of the two first clamping strips 252.

[0039] As shown in Figures 3-4 and Figure 7 The power bus module 3 of the embodiment further includes at least one second bus clamp 32, the second bus clamp 32 is provided with a plurality of second clamping slots 321, and the side edges of each phase power bus 31 are inserted into the corresponding second clamping slots 321. The insulating support plate 24 supports the weight of the bus, ensures the bus gap and the phase-to-phase distance, and prevents the bus from shifting. The second bus clamp 32 includes two second clamping strips 322 and at least two second connecting rods 323, the two second clamping strips 322 are symmetrically arranged, corresponding second clamping slots 321 are arranged on the opposite sides, and the two ends of the two second clamping strips 322 are connected by the second connecting rod 323 to form a frame-shaped space for accommodating each phase power bus 31. Correspondingly, the two side edges of the power bus 31 are clamped in the second clamping slots 321 on the opposite sides of the two second clamping strips 322, so as to clamp and fix the bus by the bus clamp. The gap between the two adjacent power buses 31 is also provided with a second connecting rod 323 to reinforce the second bus clamp 32. The connection between the second connecting rod 323 and the second clamping strip 322 can be achieved by inserting the two ends of the second connecting rod 323 into the insertion holes of the two second clamping strips 322.

[0040] As shown in Figures 3-4 and Figure 7As shown, the cable connection hole is provided on the current end of the feeder busbar 31 away from the outgoing contact 42, and 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 feeder busbar module 3 further comprises a current transformer 34 for detecting the current condition of the feeder busbar 31 during operation. Further, the current transformer 34 is provided in multiple, and each current transformer 34 is in the form of a ring structure, sleeved on the single-phase feeder busbar 31, and the adjacent two current transformers 34 are arranged in a staggered manner in the front-rear direction. Preferably, as shown in the figure, Figure 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 feeder busbar 31, and the layout is compact, saving space.

[0041] In a specific embodiment, the incoming end of the incoming contact 41 is laminated on the side surface of the corresponding phase of the first vertical busbar 21, and is fixed by the incoming line 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 line fixing bolt 43. The multi-phase first vertical busbar 21 comprises an A-phase first vertical busbar 211, a B-phase first vertical busbar 212, a C-phase first vertical busbar 213 and an 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 an A-phase second vertical busbar 221, a B-phase first vertical busbar 222, a C-phase second vertical busbar 223 and an 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 an A-phase incoming contact 411, a B-phase incoming contact 412 and a 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 corresponding phase of the feeder busbar 31, and is fixed by the outgoing line fixing bolt 44, the multi-phase feeder busbar 31 comprises an A-phase feeder busbar 311, a B-phase feeder busbar 312, a C-phase feeder busbar 313 and an N-phase feeder busbar 314 arranged in sequence and spaced apart in the left-right direction, and the multi-phase outgoing contact 42 comprises an A-phase outgoing contact 421, a B-phase outgoing contact 422 and a C-phase outgoing contact 423 arranged in sequence and spaced apart in the left-right direction. The N-phase feeder 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.

[0042] 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 do not indicate that the device or element referred to must have a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating relative importance.

[0043] The above is a further detailed description of the present application in combination with specific preferred embodiments, and cannot be considered as limiting the specific implementation of the present application to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, a number of simple deductions or substitutions can be made without departing from the concept of the present application, and all should be considered 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 busbar module (2) and the feeder busbar module (3) are arranged at the back of the switchgear (4), the width direction of the first vertical busbar (21) extends along the front-back 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-back direction, and the multi-phase first vertical busbar (21) and the multi-phase feeder busbar (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 terminal of the incoming terminal contact (41) for connecting the first vertical busbar (21) extends along the up-down direction and the length direction extends along the front-back direction, the width direction of the outgoing terminal of the outgoing terminal contact (42) for connecting the feeder busbar (31) extends along the up-down direction and the length direction extends along the front-back direction, the outgoing terminal of the multi-phase outgoing terminal contact (42) and the incoming terminal of the multi-phase incoming terminal contact (41) are arranged alternately in the left-right direction, and the outgoing terminal of the multi-phase outgoing terminal contact (42) and the incoming terminal of the multi-phase incoming terminal contact (41) are stacked on the side of the corresponding phase feeder busbar (31).

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

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

5. The compact low voltage cabinet of claim 1, wherein: A plurality of switchgears (4) and a plurality of feeder busbar modules (3) are arranged, the plurality of switchgears (4) are arranged in sequence in the up-down direction, and the plurality of feeder busbar 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 busbar module (2) further comprises an insulating supporting plate (24) and at least one first busbar clamp (25), the insulating supporting plate (24) is provided with a busbar slot (241), and the first busbar clamp (25) is provided with a plurality of first clamping grooves (251), the current end of the first vertical busbar (21) is arranged in the busbar slot (241), and the side edge of each phase first vertical busbar (21) is arranged in the corresponding first clamping groove (251).

7. The compact low voltage cabinet of claim 1, wherein: The feeder busbar module (3) further comprises at least one second busbar clamp (32), and the second busbar clamp (32) is provided with a plurality of second clamping grooves (321), and the side edge of each phase feeder busbar (31) is arranged in the corresponding second clamping groove (321).

8. The compact low voltage cabinet of claim 1, wherein: The incoming end of the incoming contact (41) is stacked on the side of the first vertical busbar (21) of the corresponding phase and fixed by an incoming fixing bolt (43), the multi-phase first vertical busbar (21) includes an A-phase first vertical busbar (211), a B-phase first vertical busbar (212), a C-phase first vertical busbar (213) and an N-phase first vertical busbar (214) arranged in sequence in the left-right direction, and the multi-phase incoming contact (41) includes an A-phase incoming contact (411), a B-phase incoming contact (412) and a C-phase incoming contact (414) arranged in sequence in the left-right direction. (413); the outgoing line end of the outgoing line contact (42) is stacked on the side of the corresponding phase feed bus (31) and fixed by an outgoing line fixing bolt (44); the multi-phase feed bus (31) includes an A-phase feed bus (311), a B-phase feed bus (312), a C-phase feed bus (313) and an N-phase feed bus (314) arranged in sequence in the left-right direction; the multi-phase outgoing line contact (42) includes an A-phase outgoing line contact (421), a B-phase outgoing line contact (422) and a C-phase outgoing line contact (423) arranged in sequence in the left-right direction.

9. The compact low voltage cabinet of claim 8, wherein: The N-phase feeding busbar (314) is stacked on the side of the N-phase first vertical busbar (214) and fixed by N-phase fixing bolts (35).

10. The compact low voltage cabinet according to any of claims 1-9, characterized in that: The cabinet (1) has a dimension W in the left-right direction, 400 mm ≤ W ≤ 600 mm; and the outer surfaces of the incoming contact (41) and the outgoing contact (42) have a graphene coating.

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