CN216390051U - Busbar device and power distribution cabinet - Google Patents

Abstract

The present disclosure relates to a busbar device and a power distribution cabinet. A busbar arrangement (1410) is adapted to be mounted to a power distribution cabinet and configured for connecting a circuit breaker. The female device that arranges includes: at least two phase bus bars (1415) arranged parallel to each other, each phase bus bar (1415) of the at least two phase bus bars (1415) comprising a substantially sheet-like body; and a plurality of insulating plates arranged one on top of the other with each of the at least two-phase bus bars (1415) such that each of the at least two-phase bus bars (1415) is electrically insulated from each other, the plurality of insulating plates including: a first insulating plate (1417a), a second insulating plate (1417b), at least one third insulating plate (1417 c). The busbar device according to the embodiment of the present disclosure simplifies the connection between the power distribution cabinet and the circuit breaker in a cost-effective manner, and reduces the functional space occupied by the connection between the power distribution cabinet and the circuit breaker.

Description

Busbar device and power distribution cabinet

Technical Field

Embodiments of the present disclosure generally relate to a busbar device, and more particularly, to a busbar device adapted to fixedly mount a circuit breaker.

Background

Low voltage distribution cabinets are usually fixedly equipped with a large number of Molded Case Circuit Breakers (MCCBs) for the safe control of the circuits. In many application scenarios, the installation density of the MCCB in the power distribution cabinet is high. Every MCCB needs to be connected with the inlet wire of switch board, leads to female big, female row of size of arranging many, and the wiring is complicated, and the wiring is some many to female arranging exposes outside. Traditional female device of arranging not only the wiring is complicated, and female arranging exposes in a large number, and this not only causes huge potential safety hazard to installation and maintenance are complicated. In addition, the current busbar structure occupies a large amount of space in the power distribution cabinet, and the installation capacity and the function expansion of the power distribution cabinet are limited. It is desirable to improve the conventional bus bar structure.

Disclosure of Invention

Embodiments of the present disclosure provide a busbar device and a power distribution cabinet, which are intended to solve one or more of the above problems and other potential problems.

According to a first aspect of the present disclosure, there is provided a busbar device adapted to be mounted to a power distribution cabinet and configured for connecting a circuit breaker, comprising: at least two phase bus bars arranged in parallel with each other, each phase bus bar of the at least two phase bus bars comprising a substantially sheet-shaped body; and a plurality of insulating plates, the insulating plates and the bus bars in the at least two bus bars being arranged in a stacked manner such that the bus bars in the at least two bus bars are electrically insulated from each other, wherein the plurality of insulating plates include: a first insulating plate arranged on a top side of a topmost busbar of the at least two busbar rows; a second insulating plate disposed at a bottom side of a bottommost bus bar of the at least two bus bars; and at least one third insulating plate arranged between adjacent busbars of the at least two busbar rows.

According to female device of arranging of this disclosed embodiment, simplified the connection between switch board and the circuit breaker with cost-effective mode to the functional space that the connection between switch board and the circuit breaker occupied has been reduced.

In an embodiment according to the present disclosure, each of the at least two phase busbars includes a first through hole extending through the sheet-shaped main body of the busbar, wherein an electrical connection between the each phase busbar and a line inlet end for supplying power to the each phase busbar is provided via the first through hole.

In an embodiment according to the present disclosure, the line inlet end comprises a line inlet post comprising a conductor core and an insulating layer surrounding the conductor core, the conductor core comprising a threaded bore at the terminal end to threadedly engage a fastener passing through the first through hole.

In an embodiment according to the present disclosure, all of the insulating plates in front of the bus bar where the first through hole is located include a first opening and a first insulator at a position corresponding to the first through hole, wherein the first opening provides a first passage for the fastener to pass through the first through hole from the first insulating plate side, and the first insulator is configured to provide electrical insulation between the fastener and the bus bar.

In an embodiment according to the present disclosure, each of the at least two phase busbars comprises a plurality of second through holes extending through the sheet-like body of the respective busbar, wherein the respective busbar is provided for electrical connection with a respective phase terminal of the circuit breaker via the second through holes.

In an embodiment according to the present disclosure, the busbar device further comprises a plurality of terminals corresponding to a plurality of second through holes, wherein a distal end of each terminal of the plurality of terminals is configured to abut a surface of the sheet-like body of the respective busbar at a periphery of the second through hole, and a proximal end of the terminal is configured to be attached to a respective phase terminal of the circuit breaker.

In an embodiment according to the present disclosure, a distal end of each of the plurality of posts includes a first threaded hole extending in a longitudinal direction of the post to enable the bus bar to be fastened with the post by means of a first fastener.

In an embodiment according to the present disclosure, the proximal end of each of the plurality of posts comprises a second threaded hole extending in a longitudinal direction of the post to enable fastening of the post with a respective phase terminal of the circuit breaker by means of a second fastener.

In an embodiment according to the present disclosure, all of the insulating plates behind the busbar where the second through-hole is located include a second opening at a position corresponding to the second through-hole, where the second opening provides a second passage for the first fastener to pass through the second through-hole from the second insulating plate side.

In an embodiment according to the present disclosure, the busbar arrangement further comprises a second insulator arranged around the second channel to electrically insulate the first fastener from the busbar.

In an embodiment according to the present disclosure, each busbar of the at least two busbar rows and each insulation plate of the plurality of insulation plates comprises a third opening disposed therethrough at a corresponding location, wherein the third opening provides a third passage for a third fastener to fasten the at least two busbar rows and the plurality of insulation plates to each other in a stacked relationship.

In an embodiment according to the present disclosure, the busbar arrangement further comprises a third insulator arranged around the third channel, such that the third fastener is electrically insulated from the busbar.

In an embodiment according to the present disclosure, the busbar arrangement further comprises a carrier plate arranged on a bottom side of the third insulating plate and configured to support a layered stack formed by the at least two phase busbars and the plurality of insulating plates.

In an embodiment according to the present disclosure, each of the at least two phase busbar is substantially flat; each of the plurality of insulating plates is formed as an alternate concave-convex surface at a surface opposite to the each phase bus bar.

In an embodiment according to the present disclosure, the circuit breaker includes an MCCB.

In an embodiment according to the present disclosure, each of the at least two bus bars has a length and a width smaller than respective lengths and widths of the plurality of insulating plates.

According to a second aspect of the present disclosure, a power distribution cabinet is provided. The power distribution cabinet can comprise a frame body; and a busbar arrangement according to any one of the preceding aspects, adapted to be mounted to the frame body.

Drawings

The above and other objects, features and advantages of the embodiments of the present disclosure will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. In the drawings, several embodiments of the present disclosure are shown by way of example and not limitation.

Fig. 1 shows a partial schematic view of a power distribution cabinet according to a first embodiment of the present disclosure.

Fig. 2 shows an overall structural schematic diagram of a busbar device according to a first embodiment of the present disclosure.

Fig. 3 illustrates a schematic structural view of a busbar device according to a first embodiment of the present disclosure.

Fig. 4 shows a schematic structural diagram of a housing of a busbar device according to a first embodiment of the present disclosure.

Fig. 5 shows a schematic cross-sectional view of a busbar arrangement according to a first embodiment of the present disclosure.

Fig. 6 shows an installation schematic of a busbar device and a circuit breaker according to a first embodiment of the present disclosure.

Fig. 7 shows a schematic structural view of a set of connecting studs according to a first embodiment of the present disclosure.

Fig. 8 shows a partial schematic view of a power distribution cabinet according to a second embodiment of the present disclosure.

Fig. 9 shows an overall structural schematic diagram of a busbar device according to a second embodiment of the present disclosure.

Fig. 10 shows a schematic cross-sectional view of a busbar arrangement according to a second embodiment of the present disclosure.

Fig. 11 illustrates a schematic structural view of a busbar device according to a second embodiment of the present disclosure.

Fig. 12 shows a schematic structural view of a set of connecting studs according to a second embodiment of the present disclosure.

FIG. 13 shows a schematic cross-sectional view of a connection column according to a second embodiment of the present disclosure.

Fig. 14 shows a partial schematic view of a power distribution cabinet according to a third embodiment of the present disclosure.

Fig. 15 shows an overall structural schematic diagram of a busbar device according to a third embodiment of the present disclosure.

Fig. 16 shows an exploded schematic view of a third embodiment according to the present disclosure.

Fig. 17 is a schematic view showing an overall structure of a bus bar device according to a third embodiment of the present disclosure, in which a portion of an insulator is removed to facilitate the illustration of other structures.

Fig. 18 shows a schematic cross-sectional view of a busbar arrangement according to a third embodiment of the present disclosure.

Fig. 19 shows an installation schematic diagram illustrating a busbar device and a circuit breaker according to a third embodiment of the present disclosure.

Fig. 20 shows a schematic structural view of a busbar according to a third embodiment of the present disclosure.

Like or corresponding reference characters designate like or corresponding parts throughout the several views.

Detailed Description

Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The term "include" and variations thereof as used herein is meant to be inclusive in an open-ended manner, i.e., "including but not limited to". Unless specifically stated otherwise, the term "or" means "and/or". The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "upper," "lower," "front," "rear," and the like, refer to placement or positional relationships based on the orientation or positional relationship shown in the drawings, merely for convenience in describing the principles of the disclosure, and do not indicate or imply that the referenced elements must be in a particular orientation, constructed or operated in a particular orientation, and therefore should not be taken as limiting the disclosure.

As mentioned before, low voltage distribution cabinets are usually fixedly equipped with a large number of MCCBs. The MCCB of big density is installed in the finite space of switch board and is realized the connection of distribution lines, and this puts forward very high design requirement to female device of arranging. The traditional busbar device of the low-voltage power distribution cabinet has large size and large number and is exposed outside; resulting in complicated wiring and bus bars being exposed. In view of the above, the busbar device according to the embodiment of the present disclosure provides an integrated modular busbar device to solve some or all of the above problems.

The power distribution cabinet and the busbar device according to the embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It is worth mentioning that although in the illustrated embodiment, the inventive concept according to the present disclosure is illustrated with a three-phase power as an example; it should be noted that the busbar device according to the embodiment of the present disclosure may be used for two-phase, three-phase, or four-phase power. Similarly, in the illustrated embodiment, the inventive concept according to the present disclosure is illustrated with an MCCB as an example of a circuit breaker. It is worth mentioning that the busbar device according to the embodiment of the present disclosure may be similarly applied to other types of circuit breakers.

A power distribution cabinet 100 and a busbar device 10 according to an embodiment of the present disclosure will be described with reference to fig. 1 to 7.

As shown in fig. 1, the power distribution cabinet 100 includes a frame body 40 and a busbar device 10. The frame body 40 may be arranged, for example, in a power distribution room, and the busbar device 10 may be arranged in the form of an assembly body or an integrated body. One end or one side of the busbar device 10 can be connected with a wire inlet end from a power distribution cabinet; and the other end or side of the busbar device 10 may be connected to a terminal from the circuit breaker 20. Since the busbar device 10 is arranged in the form of an assembly body or an integrated body, the line connection of the power distribution cabinet 100 and the circuit breaker 20 can be conveniently realized through the integrated busbar device 10. Compared with the traditional wiring mode of the power distribution cabinet 100 and the circuit breaker 20, the connection between the power distribution cabinet 100 and the circuit breaker 20 is greatly simplified, and the functional space occupied by the connection between the power distribution cabinet 100 and the circuit breaker 20 is compressed.

In the illustrated embodiment, the busbar arrangement 10 comprises three connection terminals in the form of lugs 12 on the upper side, which can be electrically connected to the three-phase incoming lines from the switchgear cabinet 100, respectively. The busbar arrangement 10 includes a plurality of sets of terminals on the underside (not shown but hidden by the circuit breaker 20). The posts are good electrical conductors and can be made of copper, for example. Each set of terminals may include three terminals that may be respectively connected with three terminals of the MCCB. Therefore, the power distribution cabinet 100 can be conveniently connected with the circuit breaker 20 by means of the busbar device 10.

In the illustrated embodiment, the busbar device 10 may include a housing 14. The three-phase bus bars of the bus bar arrangement 10 are arranged in the housing 14 in an insulated manner. The case 14 not only provides insulation between the bus bars, but also prevents the bus bars from being exposed, thereby improving safety.

In the illustrated embodiment, the busbar device 10 and the circuit breaker 20 are electrically connected by a terminal. Furthermore, the power distribution cabinet 100 may further comprise a support plate 30. The support plate 30 is configured to support the circuit breaker at a lower side of the circuit breaker 20, whereby the mounting strength of the circuit breaker can be improved. In some embodiments, the bottom side of the circuit breaker 20 may also include a small mounting plate (not shown in the figures) via which the circuit breaker is mounted to the support plate 30. This can further improve the mounting strength of the circuit breaker.

In the illustrated embodiment, the MCCBs are three-phase, with each MCCB occupying three outlet holes. It is worth noting that this is merely exemplary. In some cases, the MCCB may be two-phase or four-phase. Similarly, in the illustrated embodiment, each busbar device 10 includes a total of 12 outlet holes, so that 4 MCCBs can be installed. This is merely exemplary. The busbar device 10 may have other suitable number of sizes according to the size of the power distribution cabinet 100.

It should be noted that, in the illustrated embodiment, the busbar device 10 is provided with a terminal connected to a terminal from the circuit breaker 20 on the upper side; and an outlet terminal connected to a terminal from the circuit breaker 20 is provided on the lower side of the busbar device 10. This is merely exemplary and the wire terminals and outlet terminals may be arranged in other suitable locations. For example, the busbar device 10 may include a terminal and/or an outlet terminal on the side. Such variations are also within the scope of the present disclosure based on the teachings of the present disclosure.

In the illustrated embodiment, as shown in fig. 2-4, the busbar device 10 may include a three-phase busbar 15 and a housing 14. Each of the three-phase bus bars 15 includes a substantially sheet-shaped body. The busbar 15 is generally made of copper material to satisfy good electrical conductivity and heat dissipation performance. The housing 14 is typically constructed of an insulating material and may include three compartments 16 arranged side by side in its thickness direction. Each compartment 16 of the three compartments 16 is configured to receive a respective busbar of the three busbars 15. Adjacent compartments 16 of the three compartments 16 are separated from each other by a partition 17 having a predetermined thickness. Insulation between adjacent busbars is provided by an insulating spacer 17 of a predetermined thickness. In some embodiments, the housing 14 may be formed in one piece by injection molding. This may reduce manufacturing complexity, but requires the design of a corresponding mold.

In the illustrated embodiment, as shown in fig. 2-4, each phase busbar 15 of the three-phase busbar 15 includes one first lug 12 protruding from the outer periphery of the sheet-like body of the busbar 15. By providing the first lug 12, the first lug 12 is configured as a first connection terminal electrically connected to the incoming line of the busbar. The busbar 15 is typically of sheet construction, in which case the terminal takes the form of a lug which can facilitate manufacture of the terminal. In addition, even if the case 14 for the busbar device is provided, the busbar 15 can be electrically connected to the incoming line terminal from the power distribution cabinet. In the illustrated embodiment, the busbar arrangement 10 is for three-phase power, so that the busbar arrangement 10 comprises a total of three first lugs 12. In other embodiments, where the busbar arrangement 10 is for two-phase electrical, the busbar arrangement 10 comprises a total of two first lugs. Similarly, in case the busbar arrangement 10 is used for four-phase electrical, the busbar arrangement 10 comprises a total of four first lugs. The first lug 12 may comprise a through hole, for example for fastening purposes. It is worth noting that the shape of the first lug 12 is not limited in any way, and any other suitable shape may be adopted.

In the illustrated embodiment, as shown in fig. 2-4, each phase busbar 15 of the three-phase busbars 15 is embedded in a respective compartment 16. Thus, by wrapping the busbars 15 by the insulating walls of the compartments 16, it is possible to ensure that the busbars 15 have sufficient insulation from each other.

In the illustrated embodiment, as shown in fig. 2-4, each phase busbar 15 of the three-phase busbar 15 includes a plurality of second lugs 13 protruding from an outer periphery of the sheet-like body of the busbar, wherein each second lug 13 is configured to electrically connect with a respective phase terminal of the circuit breaker 20. In the illustrated embodiment, each phase bus bar 15 of the bus bar arrangement 10 comprises four second lugs, whereby four sets of circuit breakers 20 may be attached. It is worth noting that this is merely exemplary. Each busbar 15 may comprise another number of second lugs. The second lug 13 may comprise a through hole for fastening purposes. It is to be noted that the shape of the second lug 13 is not limited at all, and any other suitable shape may be adopted.

Similar to the first lug, since the busbar 15 is generally of a sheet structure, in which case the terminal takes the form of a lug, it may be convenient to manufacture the terminal, for example by directly forming the busbar by stamping. In addition, since the lug is protrudingly provided from the outer peripheral edge of the busbar, the electrical connection of the busbar 15 and the connection terminal of the circuit breaker 20 can be conveniently achieved. Adjacent second lugs 13 of the plurality of second lugs 13 are spaced apart from each other by a predetermined gap corresponding to a gap between terminals of the circuit breaker 20. Each set of second lugs 13 is spaced apart from each other by a gap corresponding to a mounting gap between adjacent circuit breakers 20. On this basis, the user can conveniently arrange and design the position of the second lug on the busbar device. In the illustrated embodiment, four busbars 15 are provided per busbar.

In the illustrated embodiment, as shown in fig. 2-4, the busbar device 10 further includes a plurality of posts 50 corresponding to the plurality of second lugs 13. A distal end of each lug 50 of the plurality of lugs 50 is configured to be attached to the second lug 13 and a proximal end of the lug 50 is configured to be attached to a respective phase terminal of the circuit breaker 20. It is worth noting that the terms "proximal" and "distal" are with respect to the installation direction of the busbar device 10 with respect to the circuit breaker 20; "proximal" is the side of the circuit breaker 20 that is closer to the user when mounted to the busbar device 10; the "far end" is the side of the circuit breaker 20 that is away from the user when mounted to the busbar device 10. By the terminal 50, even if the case 14 is formed in an enclosing structure, the electrical connection of the bus bar device 10 and the circuit breaker 20 is conveniently achieved without disassembling the case 14.

In the illustrated embodiment, as shown in fig. 2-4, the front surface of the housing 14 of the busbar device 10 further includes a through hole 18. The proximal ends of the posts 50 may protrude from the through holes 18 to facilitate attachment of the respective phase terminals of the circuit breaker 20. It is worth mentioning that although the through hole 18 is provided on the front surface of the housing 14 in the illustrated embodiment. In other embodiments, the through-holes 18 may be disposed on other surfaces of the housing 14, such as side surfaces.

Fig. 5 and 6 show installation schematic diagrams of the busbar device 10 and the circuit breaker 20 according to the first embodiment of the present disclosure.

In some embodiments, as shown in fig. 5 and 6, the distal end of each post 50 of the plurality of posts 50 includes a first threaded hole extending in a longitudinal direction of the post 50. The first fastener 60 may fasten the second lug 13 and the post 50 together. Thus, the electrical connection between the terminal 50 and the busbar 15 can be conveniently achieved.

In the illustrated embodiment, the first fastener 60 is insertable into the housing 14 from the rear side of the busbar assembly 10. As shown in fig. 5 and 6, the housing 14 may include a plurality of channels 18 extending through the thickness of the housing below the compartment 16. The second lug 13 extends down through the upper wall 19 of the channel 18 to emerge in the channel 18, i.e. the second lug 13 extends in the channel 18. The first fastener 60 may pass through the channel 18 from the rear side of the busbar arrangement 10 to the location of the busbar 15 to be electrically connected. The second lug 13 may comprise a through hole. The first fastener 60 is fitted with the post 50 through the through hole of the second lug 13. The first fastener 60 may comprise a screw or other suitable fastener. The channel 18 may provide reliable electrical insulation for the first fastener 60. Further, with such a structure, after the busbar 15 is inserted into the compartment 16 of the busbar device 10, electrical connection can be conveniently achieved without moving the busbar 15. In some embodiments, the upper wall 19 of the channel 18 may also at least partially support the busbar 15. Therefore, support can be provided for the busbar. In some embodiments, the distal end of the post 50 makes electrical contact by abutting the blade surface of the second lug 13. For example, the diameter of the distal end of the post may be larger than the size of the through hole of the second lug 13. Such a structure can ensure a sufficient electrical contact area. It should be noted that this is merely an exemplary manner of electrical contact, and other suitable manners of electrical contact may be used.

In some embodiments, as shown in fig. 5 and 6, the proximal end of each post 50 of the plurality of posts 50 includes a second threaded hole extending in a longitudinal direction of the post 50. The terminal 50 can be fastened to the corresponding phase terminal of the circuit breaker 20 by means of a second fastener 70. For example, the second fastener 70 may pass through a corresponding phase terminal of the circuit breaker 20 from the front side of the busbar device 10 and be fastened to the proximal end of the terminal 50. Thereby, the bus bar 15 of the bus bar device 10 to be electrically connected may be electrically connected with the corresponding terminal of the circuit breaker 20 by means of the second fastener 70.

It should be noted that the principle of connecting one terminal of the circuit breaker 20 with one busbar of the busbar arrangement 10 is illustrated by taking one busbar 15 as an example in the embodiment of fig. 5 to 6. For a three-phase circuit breaker 20, the circuit breaker 20 may include three terminals, with the other two terminals being connected using substantially the same structure and principles. Although illustrated in the illustrated embodiment as a three-phase circuit breaker 20, it may be similarly implemented in cases where the circuit breaker includes two or four phases.

Since the bus bars in the bus bar device according to the embodiment of the present disclosure are arranged in a stacked manner along the thickness of the bus bar device, the terminals used therefor have similar structures but have different lengths.

Fig. 7 illustrates a view of a lug kit according to an embodiment of the present disclosure. The terminal kit may include: a first terminal 510 having a first end of a predetermined first predetermined length and a second end of a first second predetermined length, the first terminal 510 being configured for electrically connecting a first phase busbar of a busbar arrangement with a corresponding phase terminal of a circuit breaker; a second terminal 520 having a first end of a second first predetermined length and a second end of a second predetermined length, the second terminal 520 being configured for a second phase bus bar of the bus bar arrangement to be electrically connected with a corresponding phase terminal of the circuit breaker; and a third terminal 530 having a first end of a third first predetermined length and a second end of a third second predetermined length, the third terminal 530 being configured for a third phase busbar of the busbar arrangement to be electrically connected with a corresponding phase terminal of the circuit breaker.

In the illustrated embodiment, the first predetermined length differs from the second first predetermined length by a first predetermined distance, the second first predetermined length differs from the third first predetermined length by a second predetermined distance, the first predetermined distance being equal to the second predetermined distance; the first second predetermined length, the second predetermined length, and the third second predetermined length are equal to each other. In the illustrated embodiment, the first end may be a proximal end, i.e., the end that extends from the through-hole 18 in the embodiment of FIGS. 5-6; while the second end is the distal end, i.e. the end inserted into the housing 14 and attached with the first fastener 60 inserted from the rear side of the busbar arrangement 10. In the illustrated embodiment, the first and second predetermined distances may be equal to a distance in a thickness direction between adjacent bus bars 15. Through the length setting, the electric connection between the laminated busbars and the corresponding wiring terminals of the circuit breaker can be realized by utilizing the wiring terminals

A power distribution cabinet 800 and a busbar arrangement 810 according to an embodiment of the present disclosure are illustrated with reference to fig. 8-13. The embodiment of fig. 8-13 is similar to that of fig. 1-7, except that the embodiment of fig. 8-13 provides a direct plug-in attachment between the circuit breaker 820 and the busbar device 810. It is worth noting that the various variants described for the busbar arrangement 10 of the previous embodiment may equally be applied in the busbar arrangement 810.

As shown in fig. 8, the power distribution cabinet 800 includes a frame body 840 and a busbar device 810. The frame body 840 may be arranged, for example, in a power distribution room, and the busbar device 10 may be arranged in the form of an assembly or an integrated body. In the illustrated embodiment, the busbar arrangement 810 comprises three connection terminals in the form of lugs 812 on the upper side, which can be electrically connected to the three-phase incoming lines from the switchgear cabinet 100, respectively. The busbar arrangement 810 includes a plurality of sets of terminals on the underside (not shown but hidden by the circuit breaker 20). Each set of terminals may include three terminals that may be respectively connected with three terminals of the MCCB. Therefore, the power distribution cabinet 100 can be conveniently connected with the circuit breaker 20 by means of the busbar device 10.

In the illustrated embodiment, the busbar assembly 810 may include a housing 814. The three-phase bus bars of the bus bar device 810 are disposed in the case 814 while being insulated from each other. The case 814 not only provides insulation between the bus bars, but also prevents the bus bars from being exposed to improve safety.

In the illustrated embodiment, the busbar device 810 and the circuit breaker 820 are electrically connected by a terminal. In addition, the power distribution cabinet 100 can further include a support plate 830. The support plate 830 is configured to support the circuit breaker at a lower side of the circuit breaker 20, whereby the mounting strength of the circuit breaker can be improved. In some embodiments, the bottom side of the circuit breaker 820 may also include a mounting plate (not shown in the figures) via which the circuit breaker is mounted to the support plate 830. This can further improve the mounting strength of the circuit breaker.

In the illustrated embodiment, as shown in fig. 9-11, the busbar assembly 810 may include a three-phase busbar 815 and a housing 814. Each of the three-phase busbars 815 includes a substantially sheet-shaped body. The busbar 15 is generally made of copper material to satisfy good electrical conductivity and heat dissipation performance. The housing 814 is typically constructed of an insulating material and may include three compartments 816 arranged side by side in a thickness direction thereof. Each compartment 816 of the three compartments 816 is configured to receive a respective busbar of the three busbars 815. Adjacent compartments 816 of the three compartments 816 are separated from each other by a partition 817 having a predetermined thickness. Insulation between adjacent busbars is provided by insulating spacers 817 of a predetermined thickness. In some embodiments, the housing 814 may be formed in one piece by injection molding. This may reduce manufacturing complexity, but requires the design of a corresponding mold.

In the illustrated embodiment, as shown in fig. 9-11, each phase busbar 815 of the three-phase busbar 815 includes a first lug 812 protruding from an outer periphery of the sheet-like body of the busbar 815. By providing the first lug 812, the first lug 812 is configured to serve as a first wire terminal electrically connected to the incoming wire of the busbar. The busbar 815 is typically of sheet construction, in which case the terminal takes the form of a lug projecting from the outer periphery to facilitate manufacture of the terminal. In addition, even if the case 814 for the busbar device is provided, the busbar 815 can be electrically connected to the incoming line terminal from the distribution cabinet with ease. In the illustrated embodiment, the busbar arrangement 8 is 10 for three-phase power, so the busbar arrangement 810 comprises a total of three first lugs 812. In other embodiments, where the busbar arrangement 810 is for two-phase power, the busbar arrangement 810 includes a total of two first lugs. Similarly, in the case where the busbar arrangement 810 is for four-phase power, the busbar arrangement 810 includes a total of four first lugs. The first lug 812 may include a through hole for fastening purposes. It is noted that the shape of the first lug 812 is not limited in any way and may take any other suitable shape.

In the illustrated embodiment, as shown in fig. 9-11, each phase busbar 815 of the three-phase busbars 815 is embedded in a respective compartment 816. Thus, by wrapping the busbars 815 with the insulating walls of the compartments 816, sufficient insulation between the busbars 815 may be ensured.

In the illustrated embodiment, as shown in fig. 9-11, each phase busbar 815 of the three-phase busbar 815 includes a plurality of second lugs 813 protruding from an outer periphery of the blade body of the busbar, wherein each second lug 813 is configured to electrically connect with a respective phase terminal of the circuit breaker 820. In the illustrated embodiment, each phase of the busbar 815 of the busbar arrangement 10 includes four second lugs, whereby four sets of circuit breakers 820 are attachable. It is worth noting that this is merely exemplary. Each busbar 815 may include other numbers of second lugs. Similarly, the second lug 813 may include a through hole for fastening purposes. It is noted that the shape of the second lug 813 is not limited in any way, and any other suitable shape may be adopted.

Similar to the first tab, since the busbar 815 is generally of a sheet structure, in which case the terminal takes the form of a tab, it may be convenient to manufacture the terminal. In addition, even if the case 814 for the busbar device is provided, the electrical connection between the busbar 815 and the connection terminal of the circuit breaker 820 can be easily achieved. Adjacent second lugs 813 of the plurality of second lugs 813 are spaced apart from each other by a predetermined gap corresponding to a gap between terminals of the circuit breaker 820. Each set of the second bosses 813 are spaced apart from each other by a gap corresponding to a mounting gap between adjacent circuit breakers 20. On this basis, the user can conveniently arrange and design the position of the second lug on the busbar device. In the illustrated embodiment, four busbars 15 are provided per busbar.

In the illustrated embodiment, as shown in fig. 9-11, the busbar assembly 810 further includes a plurality of posts 850 corresponding to the plurality of second lugs 813. A distal end of each lug 850 of the plurality of lugs 850 is configured to be attached to the second lug 813, and a proximal end of the lug 850 is configured to be attached to a respective phase terminal of the circuit breaker 820. The post 850 is configured as a pluggable connector configuration. Thus, the pluggable terminals of the circuit breaker 820 can be directly plugged into the terminals 850 or unplugged from the terminals 50.

As shown in fig. 9, the busbar assembly 810 may include a plurality of protective covers 880, and the protective covers 880 may be configured to cover the proximal ends of the terminals 850, i.e., the portions of the terminals 850 protruding from the front surface of the busbar assembly 810. The shield 880 may provide insulation protection for the electrical contact between the circuit breaker 820 and the terminal 850 on the one hand; on the other hand, it can play a role of positioning and maintaining the orientation of the post 850. This is achieved, in particular, by the shape of the base portion of the boot 880 matching the shape of the post 850.

In some embodiments, the boot 880 may comprise two parts, the first part being a base part, which may be mounted to the front surface of the housing 814. The second component is a socket that can be mounted to the base portion and is configured such that the pluggable contacts of the terminal 850 provide structural support and are shaped to receive the contacts of the circuit breaker 820. The base portion may be mounted to a front surface of the housing 814.

For example, in some embodiments, the base portion may be inserted into the front surface of the housing 814 by a snap fit. The base portion may include a through hole passing therethrough. The post 850 may be inserted into the base portion from the front side of the base portion and extend through the front surface of the housing 814 into the housing 814 where the second lug 813 to be electrically connected is located (as shown in fig. 10). As shown in fig. 10, a distal end of each post 850 of the plurality of posts 850 includes a threaded hole 858 (see fig. 12) extending in a longitudinal direction of the post 850. A fastener such as a screw or the like may fasten the second lug 813 with the post 850. Thus, the electrical connection between the terminal 850 and the busbar 815 can be conveniently achieved.

In the illustrated embodiment, as shown in fig. 10, a fastener (not shown) may be inserted into the housing 814 from the rear side of the busbar assembly 810. The housing 814 may include a plurality of channels 818 extending through the thickness of the housing below the compartment 816. The second lug 813 extends downwardly through the upper wall 819 of the channel 818 to project into the channel 818. Fasteners may pass from the rear side of the busbar arrangement 810 through the channels 818 to the location of the busbar 815 to be electrically connected. The second lug 813 may include a through hole. The fastener is installed with the post 850 through the through hole in the second lug 813. The fasteners may include screws or other suitable fasteners. The channel 818 may provide reliable electrical insulation for the fastener. Further, with such a structure, after the busbar 815 is inserted into the compartment 816 of the busbar device 810, the electrical connection can be conveniently achieved without moving the busbar 815. In some embodiments, the distal end of the post 850 makes electrical contact by abutting the tab surface of the second lug 813. For example, the diameter of the distal end of the post may be larger than the size of the through hole of the second lug 13. Such a structure can ensure a sufficient electrical contact area.

Fig. 11 shows a schematic block diagram of a post 850 according to an embodiment of the present disclosure. Instead of the threaded bore of the proximal end of the terminal 50, as shown in fig. 11, the proximal end of the terminal 850 may include a plurality of blades, each of the plurality of blades including a longitudinal first end, a longitudinal second end, and an outwardly bulged intermediate portion 856 between the first and second ends, wherein the respective first ends of the plurality of blades are enclosed into an opening adapted to removably receive a respective phase terminal of the circuit breaker, wherein the first and second ends include spring clips 854, 852, respectively, to tightly band the plurality of blades to one another. Such a configuration may ensure the proximal durability of the post 850. Even after thousands of insertions and removals, the post 850 can still ensure adequate electrical contact performance.

It should be noted that the principle of connecting one terminal of the circuit breaker 820 with one busbar of the busbar device 810 is illustrated by taking one busbar 815 as an example in the embodiment of fig. 10. For a three-phase circuit breaker 820, the circuit breaker 820 may include three terminals, with the other two terminals connected using substantially the same structure and principles. Although illustrated in the illustrated embodiment as a three-phase circuit breaker 20, it may be similarly implemented in cases where the circuit breaker includes two or four phases.

Since the bus bars in the bus bar device according to the embodiment of the present disclosure are arranged in a manner of being stacked along the thickness of the bus bar device, the posts used therefor have different lengths although having similar structures.

Fig. 13 illustrates a view of a lug kit according to an embodiment of the present disclosure. The terminal kit may include: a first terminal 1310 having a first end of a predetermined first predetermined length and a second end of a first second predetermined length, the first terminal 1320 being configured for electrically connecting a first phase bus bar of the bus bar arrangement with a corresponding phase terminal of the circuit breaker; a second terminal 1320 having a first end of a second first predetermined length and a second end of a second predetermined length, the second terminal 1320 being configured for a second phase bus bar of the bus bar arrangement to be electrically connected with a corresponding phase terminal of the circuit breaker; and a third terminal 1330 having a first end of a third first predetermined length and a second end of a third second predetermined length, the third terminal 1330 configured for a third phase bus bar of the bus bar arrangement to electrically connect with a corresponding phase terminal of the circuit breaker.

In the illustrated embodiment, the first predetermined length differs from the second first predetermined length by a first predetermined distance, the second first predetermined length differs from the third first predetermined length by a second predetermined distance, the first predetermined distance being equal to the second predetermined distance; the first second predetermined length, the second predetermined length, and the third second predetermined length are equal to each other. In the illustrated embodiment, the first end may be a proximal end, i.e., the end that is covered by the protective cover 880 in the embodiment of fig. 10; while the second end is a distal end, i.e. the end inserted into the housing 814 and attached with fasteners inserted from the rear side of the busbar arrangement 810. In the illustrated embodiment, the first and second predetermined distances may be equal to a spacing in a thickness direction between adjacent busbars 815.

Fig. 14-19 illustrate a power distribution cabinet 1400 and a busbar arrangement 1410 according to an embodiment of the present disclosure. The embodiment of fig. 14-19 is similar to the embodiment of fig. 1-7, except that instead of the integrated housing 14 of the embodiment of fig. 1-7, the busbar device 1410 employs a laminated configuration of plates, which has significant benefits in reducing the consumables of the busbar device.

As shown in fig. 14, the power distribution cabinet 1400 includes a frame 1440 and a busbar device 1410. The frame 1440 may be disposed in a power distribution room, and the busbar 1410 may be disposed in an assembled or integrated form. One end or one side of the busbar device 1410 can be connected with a wire inlet end from a power distribution cabinet; and the other end or side of the bus bar 1410 may be connected to a terminal from the circuit breaker 1420. Since the bus bar device 1410 is arranged in the form of an assembly body or an integrated body, the line connection between the power distribution cabinet 1400 and the circuit breaker 1420 can be conveniently realized through the integrated bus bar device 1410. Compared with the traditional wiring mode of the power distribution cabinet 1400 and the circuit breaker 1420, the connection between the power distribution cabinet 1400 and the circuit breaker 1420 is greatly simplified, and the functional space occupied by the connection between the power distribution cabinet 1400 and the circuit breaker 1420 is compressed.

As shown in fig. 15 and 16, the bus bar device 1410 may include: a three-phase bus bar 1415 and a plurality of insulating plates arranged in parallel with each other. Each of the three-phase bus bars 1415 includes a substantially sheet-shaped body. The plurality of insulating plates and the busbars of the three-phase busbars 1415 are arranged to be stacked on each other, so that the busbars of the three-phase busbars 1415 are electrically insulated from each other.

In the illustrated embodiment, the plurality of insulating plates includes: a first insulation plate 1417a disposed at a top side of a topmost (i.e., front) busbar among the three-phase busbars 1415; a second insulation plate 1417b disposed at a bottom side of a bottommost (i.e., rear) bus bar among the three-phase bus bars 1415; and two third insulating plates 1417c disposed between adjacent bus bars of the three-phase bus bars 1415. Although in the illustrated embodiment, the inventive concept according to the present disclosure is illustrated with a three-phase power as an example; it should be noted that the busbar device according to the embodiment of the present disclosure may be used for two-phase, three-phase, or four-phase power. In this case, the third insulating plate 1417c may be adaptively modified. For example, in case of the two-phase bus bar device, the number of the third insulating plates 1417c may be one; in the case of the four-phase bus bar device, the number of the third insulating plates 1417c may be three.

In the illustrated embodiment, each of the bus bars 1415 of the three-phase bus bars 1415 of the bus bar arrangement 1410 includes a first through hole 14152 extending through the sheet-like body of the bus bar. Via the first through-hole 14152, an electrical connection between the bus bar per phase 1415 and a line inlet terminal (i.e., to a power supply wire of a power distribution cabinet) supplying power to the bus bar per phase 1415 can be provided.

In the illustrated embodiment, as shown in fig. 16-18, the line inlet end for powering each phase of the busbar 1415 may include a line inlet stub 14114. The lead-in post 14114 may include a conductor core including a threaded hole at a terminal end to threadably engage the screw 14112 through the first through hole and an insulating layer surrounding the conductor core. It is worth noting that the inlet leg 14114 may be implemented in a variety of suitable forms. For example, the incoming string 14114 may comprise the form of a conductor core and an insulating sleeve surrounding the conductor core. The wire column 14114 may extend from the rear side of the busbar arrangement 1410 to the location of the busbar 1415 to be electrically connected. In some embodiments, a proximal end face of the terminal post 14114 may abut a flat surface of the busbar 1415 to make conductive contact between the terminal post 14114 and the busbar 1415, as shown in fig. 18.

Fig. 17 illustrates a state in which a fastener such as a screw is not inserted into the bus bar 1410 in order to more clearly show the structural relationship between the respective components. In the state shown in fig. 17, a screw 14112 may be inserted from the front side of the busbar arrangement 1410 into a threaded hole at the proximal end of the wire column 14114, thereby fastening the wire column 14114 and the busbar arrangement 1410 to each other.

In the illustrated embodiment, all of the insulating plates in front of the busbar where the first through hole 14152 is located include a first opening and a first insulator 14110 at a portion corresponding to the first through hole. For example, a first opening on the insulating plate is formed at a position corresponding to the through-hole 14153, see fig. 20. The first opening provides the screw 14112 with a first passage passing through the first through hole from the first insulating plate 1417a side. In this case, the electrical connection between the inlet posts 14114 and the respective busbar can be achieved in a simple manner. In addition, the level of electrical insulation between the screw 14112 and the corresponding busbar can be further improved. In the illustrated embodiment, the first through hole 14152 and the first opening may be formed in different sizes. In some embodiments, different first insulators 14110 may be provided for different busbars of the busbar arrangement 1410; in some embodiments, an integrated first insulator 14110 may be provided for different busbars of the busbar arrangement 1410 to reduce the number of parts.

In the illustrated embodiment, as shown in fig. 16-18, each phase busbar 1415 of the three-phase busbar 1415 includes a plurality of second through holes 14154 extending through the sheet-like body of the respective busbar, wherein electrical connection of the respective busbar to a respective phase terminal of the circuit breaker is provided via the second through holes 14154.

The busbar arrangement 1410 may also include a plurality of terminals 1450. A distal end of each terminal 1450 of the plurality of terminals 1450 is configured to abut a surface of the blade body of the respective busbar at a periphery of the second through hole 14154, and a proximal end of the terminal 1450 is configured to be attached to a respective phase terminal of the circuit breaker. It is noted that the way in which the terminals 1450 contact the surface of the wafer-shaped body of the corresponding bus bar is merely an exemplary embodiment, and other ways may be adopted to electrically connect the terminals 1450 to the corresponding bus bar.

In the illustrated embodiment, as shown in fig. 16-20, the distal end of each post 1450 of the plurality of posts 1450 includes a first threaded hole extending along a longitudinal direction of the post 1450. This enables the busbar 1415 to be fastened together with the post 1450 by means of the first fastener 1460. In the illustrated embodiment, as shown in fig. 19, the second fasteners 1460 may sequentially pass through the second insulating plate 1417b (i.e., the insulating plate located at the bottom side of the bottommost busbar), the first phase busbar, the first third insulating plate 1417c, the second phase busbar, the second third insulating plate 1417c from the bottom side of the busbar arrangement 1410; and then fastened with the terminal 1450 through a through hole of the bus bar to be attached (i.e., a third bus bar). It is worth mentioning that the connection example according to the present disclosure is illustrated in the example shown in fig. 19 through the third busbar; the connections to other busbars are similar and the description thereof is omitted.

Similar to the embodiment of fig. 7, a plurality of posts 1450 may make up a post kit. The terminal kit includes: a first terminal having a first end of a predetermined first predetermined length and a second end of a first second predetermined length, the first terminal being configured for electrical connection of a first phase busbar of the busbar arrangement with a corresponding phase terminal of the circuit breaker; a second terminal having a first end of a second first predetermined length and a second end of a second predetermined length, the second terminal being configured for electrical connection of a second phase bus bar of the bus bar arrangement with a corresponding phase terminal of the circuit breaker; and a third terminal having a first end of a third first predetermined length and a second end of a third second predetermined length, the third terminal being configured for a third phase busbar of the busbar arrangement to be electrically connected with a respective phase terminal of the circuit breaker. The first preset length and the second first preset length are different by a first preset distance, the second first preset length and the third first preset length are different by a second preset distance, and the first preset distance and the second preset distance are equal; the first second predetermined length, the second predetermined length, and the third second predetermined length are equal to each other. In the illustrated embodiment, the first end may be the proximal end in the embodiment of FIG. 16; while the second end is the distal end, i.e. the end inserted into the housing 14 and attached with the first fastener 60 inserted from the rear side of the busbar arrangement 10. In the illustrated embodiment, the first and second predetermined distances may be equal to a distance in a thickness direction between adjacent bus bars 15.

In the illustrated embodiment, as shown in fig. 16-20, the proximal end of each terminal 1450 of the plurality of terminals 1450 includes a second threaded hole extending longitudinally of the terminal 1450 to enable the terminal 1450 to be fastened with a corresponding phase terminal of the circuit breaker 1420 with a second fastener 1470. In the illustrated embodiment, the second fastening member 1470 may be attached with the second screw hole of the terminal 1450 through the through hole of the first insulation plate 1417a from the front side of the bus bar unit 1410 through the connection terminal of the circuit breaker 1420. Thus, the connection of the circuit breaker 1420 to the terminal 1450 can be accomplished by the second fastener 1470.

In the illustrated embodiment, as shown in fig. 16-20, all of the insulation plates behind the bus bar where the second through holes 14154 are located include second openings at portions corresponding to the second through holes. For example, a second opening on the insulating plate is formed at a position corresponding to the through-hole 14155, see fig. 20. The second opening provides a second passage for the first fastener 1460 from the second insulating plate 1417b side through the second through hole. In this case, the electrical connection of the bus bar 1415 to the distal end of the terminal 1450 can be achieved in a simple manner.

In some embodiments, as shown in fig. 16-20, the busbar arrangement 1410 may further include a second insulator 14605 disposed around the second channel to electrically insulate the first fastener 1460 from the busbar. Thereby, sufficient electrical insulation between the first fasteners 1460 and the respective bus bars 1415 may be ensured.

In some embodiments, as shown in fig. 16-20, each busbar of the three-phase busbar 1415 and each insulating plate of the plurality of insulating plates includes a third opening disposed therethrough at a corresponding location. For example, a third opening on the insulating plate is formed at a position corresponding to the through-hole 14156, see fig. 20. The third opening provides a third passage for a third fastener 14192 to fasten the three-phase busbar 1415 and the plurality of insulation plates to each other in a stacked manner. From this, can realize the fastening between insulation board and the female row of three-phase with simple mode.

In some embodiments, as shown in fig. 16-20, the busbar arrangement 1410 further includes a third insulator 14190 disposed around the third channel to electrically insulate the third fastener 14192 from the busbar. Thereby, sufficient electrical insulation between the busbar and the fastener can be ensured.

In some embodiments, as shown in fig. 16-20, the busbar arrangement 1410 further includes a carrier plate 1417 d. The carrier plate 1417d may be disposed on a bottom side of the third insulation plate 1417c and configured to support a stacked body formed of the three-phase bus bar 1415 and a plurality of insulation plates. This can further improve the structural rigidity of the bus bar device 1410.

In some embodiments, as shown in fig. 16-20, each of the three-phase busbars 1415 is substantially flat 1415; each of the plurality of insulating plates is formed as an alternate concave-convex surface at a surface opposite to each phase bus bar 1415. This can further improve the structural rigidity of the bus bar device 1410. In the illustrated embodiment, for example, the plurality of insulating plates may include three regions extending substantially in parallel, wherein the middle region may be provided to be depressed or protruded toward the thickness direction, thereby securing a clamping effect of the bus bars and increasing an attachment rigidity of the entire bus bar device when the plurality of insulating plates and the bus bars are stacked.

In some embodiments, each of the three-phase bus bars 1415 has a length and a width that are less than the respective length and width of the insulating plates. Thereby, the electrical insulation between the bus bars can be enhanced.

According to the busbar device 1410 of the embodiment of the present disclosure, since the first through hole 14154 is disposed on the busbar 1415 to achieve connection between the busbar 1415 and the terminal 1450, the amount of copper material consumed by the busbar 1415 can be greatly reduced, and the manufacturing cost of the busbar device can be reduced.

Further, while operations are depicted in a particular order, this should be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. Under certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limitations on the scope of the disclosure. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single implementation. Conversely, various features that are described in the context of a single implementation can also be implemented in multiple implementations separately or in any suitable subcombination.

Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (17)

1. A busbar arrangement (1410) adapted to be mounted to a power distribution cabinet and configured for connecting a circuit breaker, comprising:

at least two phase bus bars (1415) arranged parallel to each other, each phase bus bar (1415) of the at least two phase bus bars (1415) comprising a substantially sheet-like body; and

a plurality of insulation plates arranged one on top of the other with respect to each of the at least two phase bus bars (1415) such that each of the at least two phase bus bars (1415) is electrically insulated from each other,

wherein the plurality of insulating plates includes: a first insulation plate (1417a) arranged on a top side of a topmost bus bar of the at least two phase bus bars (1415); a second insulating plate (1417b) disposed at a bottom side of a bottommost bus bar of the at least two phase bus bars (1415); and at least one third insulating plate (1417c) arranged between adjacent ones of the at least two phase bus bars (1415).

2. The busbar device (1410) according to claim 1, wherein each phase busbar (1415) of the at least two phase busbar (1415) comprises a first through hole (14152) extending through the sheet-like body of the busbar, wherein an electrical connection between the each phase busbar (1415) and a line inlet for supplying power to each phase busbar (1415) is provided via the first through hole (14152).

3. The bus bar arrangement (1410) of claim 2, wherein the incoming line end includes an incoming line post (14114) including a conductor core and an insulating layer surrounding the conductor core, the conductor core including a threaded hole at a terminal end to threadably engage a fastener (14112) passing through the first through hole (14152).

4. The busbar arrangement (1410) according to claim 3, wherein all of the insulating plates in front of the busbar in which the first through holes (14152) are located comprise a first opening at a location corresponding to the first through holes (14152) and a first insulator (14110), wherein the first opening provides a first passage for the fastener (14112) through the first through holes (14152) from the first insulating plate (1417a) side, and the first insulator (14110) is configured to provide electrical insulation between the fastener (14112) and the busbar.

5. The busbar device (1410) according to any of claims 1-3, wherein each phase busbar (1415) of the at least two phase busbar (1415) comprises a plurality of second through holes (14154) extending through the sheet-like body of the respective busbar, wherein the respective busbar is provided for electrical connection with a respective phase terminal of the circuit breaker via the second through holes (14154).

6. The busbar arrangement (1410) according to claim 4, further comprising a plurality of terminals (1450) corresponding to a plurality of second through holes (14154), wherein a distal end of each terminal (1450) of the plurality of terminals (1450) is configured to abut a surface of the blade body of the respective busbar at a periphery of the second through hole (14154), and a proximal end of the terminal (1450) is configured to be attached to a respective phase terminal of the circuit breaker.

7. The busbar arrangement (1410) according to claim 6, wherein a distal end of each terminal (1450) of the plurality of terminals (1450) comprises a first threaded hole extending in a longitudinal direction of the terminal (1450) to enable the busbar and the terminal (1450) to be fastened together by means of a first fastener (1460).

8. The busbar arrangement (1410) according to claim 7, wherein the proximal end of each terminal (1450) of the plurality of terminals (1450) comprises a second threaded hole extending in the longitudinal direction of the terminal (1450) to enable the terminal (1450) to be fastened together with the respective phase terminal of the circuit breaker by means of a second fastener (1470).

9. The bus bar arrangement (1410) according to claim 7, wherein all of the insulator plates behind the bus bar where the second through-holes are located comprise second openings at locations corresponding to the second through-holes (14154), wherein the second openings provide the first fasteners (1460) with second passages through the second through-holes from the second insulator plate (1417b) side.

10. The bus bar arrangement (1410) of claim 9, further comprising a second insulator (14605) disposed around the second channel to electrically insulate the first fastener (1460) from the bus bar.

11. The busbar arrangement (1410) according to any of claims 1-4 and 4-10, wherein each busbar of the at least two-phase busbar (1415) and each insulating plate of the plurality of insulating plates comprises a third opening disposed therethrough at a corresponding location, wherein the third opening provides a third passage for a third fastener (14192) to fasten the at least two-phase busbar (1415) and the plurality of insulating plates together on top of each other.

12. The busbar device (1410) according to claim 11, further comprising a third insulator (14190) disposed around the third channel to electrically insulate the third fastener (14192) from the busbar.

13. The busbar arrangement (1410) according to any of claims 1-3, 4-10 and 12, further comprising a carrier plate (1417d) arranged on the bottom side of the third insulating plate (1417c) and configured to support a stack of the at least two phase busbar arrangement (1415) and the plurality of insulating plates.

14. The busbar arrangement (1410) according to any of claims 1-3, 4-10 and 12, wherein each of the at least two phase busbars (1415) is substantially flat (1415); each of the plurality of insulation plates is formed as an alternate concave-convex surface at a surface opposite to the per-phase bus bar (1415).

15. The busbar device (1410) according to any of claims 1-3, 4-10 and 12, wherein the circuit breaker comprises an MCCB.

16. The busbar arrangement (1410) according to any of claims 1-3, 4-10 and 12, wherein each of the at least two phase busbar arrangements (1415) has a length and a width smaller than the respective length and width of the plurality of insulating plates.

17. A power distribution cabinet, characterized by comprising:

a frame (1440); and

busbar arrangement (1410) according to any of claims 1-16, adapted to be mounted to the frame body.

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