Bus bar for switchgear and switchgear

Abstract

The embodiment of the invention relates to a bus bar (100, 200, 300) for a switch device and the switch device (10). The bus bar comprises: connection segments (120, 220, 320) extending in a first direction; and a terminal base (110, 210, 310) extending in a second direction perpendicular to the first direction and electrically connected to the connection section, the terminal base (110, 210, 310) comprising at least one terminal mounting surface (112, 212, 312), the at least one terminal mounting surface being arranged along the first direction, the terminal mounting surface comprising a plurality of connection portions (114, 214, 314), the plurality of connection portions are arranged along the second direction and adapted to receive a plurality of cable terminals (152). With the bus bar of the present disclosure, the heat dissipation area of the terminal base can be enlarged, and the air convection efficiency can be improved.

Description

Technical Field

[0001] Embodiments of the present disclosure generally relate to the field of switchgear, and more particularly to a busbar for a switchgear. Background Art

[0002] Switchgear is widely used in power distribution systems and is used to switch the state of the main power circuit, such as connecting / disconnecting the circuit. Switchgear generally uses a conductive rod (such as a copper busbar) as an electrical conductor to conduct current. The busbar is generally manufactured as a flat profile, such as 80mm x 10mm, which is cut to the required length. One end of the busbar is connected to the outlet terminal of the main switch (such as a circuit breaker), and the other end of the busbar is configured to receive a cable terminal, which is in turn connected to various load devices so that power can be supplied to the load devices.

[0003] Typically, for each phase, a plurality of cable connection points for connecting cable terminals are arranged on the busbar within a narrow space in the switchgear. During the operation of the switchgear, the busbar generates a large amount of heat. For switchgear, such as air-insulated switchgear, the busbar is mainly cooled by air flowing in the gaps formed between different busbars. Conventional busbar arrangements are not satisfactory in terms of heat dissipation performance, which is crucial to the operation of the switchgear. The structure of the busbar needs to be modified to improve the heat deficiency. Summary of the invention

[0004] Example embodiments of the present disclosure provide a disconnect switch that can enhance operational performance with a simplified structure.

[0005] In a first aspect of the present disclosure, a busbar for a switchgear is provided. The busbar includes: a connecting section extending at least partially along a first direction; and a terminal base extending in a second direction perpendicular to the first direction and electrically connected to the connecting section, the terminal base including at least one terminal mounting surface, the at least one terminal mounting surface arranged along the first direction, the terminal mounting surface including a plurality of connecting portions, the plurality of connecting portions arranged along the second direction and suitable for receiving a plurality of cable terminals. According to the present disclosure, the terminal mounting surface includes a plurality of connecting portions arranged along the second direction, so that the entire terminal mounting surface can be used as a heat dissipation area. The heat dissipation area is enlarged. During operation of the switchgear, the first direction corresponds to a horizontal direction, and the second direction corresponds to a vertical direction. When the terminal mounting surface for receiving the cable is oriented vertically, the air flow for cooling the busbar can flow vertically without any obstruction. The air convection efficiency can be improved.

[0006] In some embodiments, the terminal base may include an integrally formed terminal base section, the side surface of which forms the terminal mounting surface. With this arrangement, the integrally formed terminal base section reduces contact resistance and can easily form the terminal mounting surface.

[0007] In some embodiments, the terminal base segment may include a first end, a second end opposite to the first end, and a bend at the second end, the terminal base segment being fixed to the connecting segment via the bend. With this arrangement, the terminal base segment has a simplified structure and can be manufactured in a cost-effective manner.

[0008] In some embodiments, the cross-sectional area or thickness of the terminal base segment may decrease from the first end toward the second end. With this arrangement, the material used for the busbar may be reduced without compromising the performance of the busbar.

[0009] In some embodiments, the connecting section may include a support portion adjacent to the first end and adapted to receive a support insulator, the support insulator supporting the busbar. With this arrangement, the strength of the connecting section may be increased and the cable may be fixed in a robust manner.

[0010] In some embodiments, the terminal base may include two terminal base segments, the two terminal base segments are integrally formed and extend in the second direction, each of the terminal base segments includes a side surface forming a terminal mounting surface. With this arrangement, the number of cables to be fixed can be increased with a simplified structure.

[0011] In some embodiments, the terminal base may further include a heat sink disposed between the two terminal base sections to be in thermal contact with the terminal mounting surface. With this arrangement, the heat generated by the busbar may be transferred through the heat sink.

[0012] In some embodiments, the heat sink may include a body and a plurality of fins extending from the body, wherein a surface area of ​​a fin in the plurality of fins decreases from a top side to a bottom side. With this arrangement, the configuration of the fins may improve air convection efficiency.

[0013] In some embodiments, the terminal base may further include an extension extending across the two terminal base sections, and the connecting section is attached to the terminal base at the extension. With this arrangement, the connecting section can be easily attached to the terminal base without including dielectric properties and cooling properties.

[0014] In some embodiments, the extension portion may further include at least one through hole, and the at least one through hole penetrates the extension portion to circulate air. With this arrangement, the air convection efficiency may be further improved.

[0015] In some embodiments, the connecting section may include a hollow tube that is in air communication with the open spacing between the two terminal base sections, the hollow tube forming a flue extending from the terminal base. With this arrangement, the cooling effect of the terminal base can be improved through the flue effect.

[0016] In some embodiments, the hollow tube may include a vertically oriented opening to form an outlet for a flue. With the vertically oriented opening, the heated air flow from the terminal base may be easily discharged via the flue.

[0017] In some embodiments, the terminal base may further include a support portion between the two terminal base sections, the support portion being adapted to receive a support insulator, the support insulator supporting the busbar. With this arrangement, the strength of the connection section may be increased, and the cable may be supported in a robust manner.

[0018] In some embodiments, the ends of the terminal mounting surfaces are rounded. With this arrangement, the dielectric field and dielectric performance can therefore be further improved.

[0019] In a second aspect of the present disclosure, a switchgear is provided. The switchgear comprises a main switch and a busbar according to any one of the first aspects, the busbar being connected to an outlet terminal of the main switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other objects, features and advantages of the example embodiments disclosed herein will become more readily understood by the following detailed description with reference to the accompanying drawings, in which several example embodiments disclosed herein will be illustrated in an example and non-limiting manner, in which:

[0021] Figure 1 is a schematic perspective view of a switchgear according to an example embodiment of the present disclosure;

[0022] Figure 2 is a schematic perspective view of a busbar having a plurality of cables secured thereto according to an example embodiment of the present disclosure;

[0023] Figure 3 is a schematic perspective view of a busbar according to an example embodiment of the present disclosure;

[0024] Figure 4 is a schematic perspective view of a terminal base of a busbar according to an example embodiment of the present disclosure;

[0025] Figure 5 is a schematic perspective view of a heat sink according to an example embodiment of the present disclosure;

[0026] Figure 6 is a schematic perspective view of a busbar according to another example embodiment of the present disclosure;

[0027] Figure 7 is a schematic perspective view of a terminal base of a busbar according to another example embodiment of the present disclosure;

[0028] Figure 8 is a schematic perspective view of a terminal base of a busbar according to yet another example embodiment of the present disclosure; and

[0029] Fig. 9 is a schematic perspective view of a bus bar according to another example embodiment of the present disclosure.

[0030] Throughout the drawings, the same or similar reference symbols are used to refer to the same or similar elements. DETAILED DESCRIPTION

[0031] The principles of the present disclosure will now be described with reference to several example embodiments shown in the accompanying drawings. Although example embodiments of the present disclosure are illustrated in the accompanying drawings, it is to be understood that the description of the embodiments is only to facilitate those skilled in the art to better understand and implement the present disclosure, and is not intended to limit the scope of the present disclosure in any way.

[0032] The terms "including" or "comprising" and variations thereof should be understood as open terms, which mean "including but not limited to". Unless the context clearly indicates otherwise, the term "or" should be understood as "and / or". The term "based on" should be understood as "based at least in part on". The term "operable" refers to a function, action, movement or state that can be achieved through operation induced by a user or an external mechanism. The terms "one embodiment" and "embodiment" should be understood as "at least one embodiment". The term "another embodiment" should be understood as "at least one other embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other definitions (explicit and implicit) may be included below. Unless the context clearly indicates otherwise, the definitions of terms are consistent throughout the description.

[0033] Configuring and / or placing busbars in conventional switchgear may lead to several problems. For example, the mounting surface of the terminal base is arranged perpendicular to the extension direction of the connecting section of a typical busbar. This may result in the busbar being oriented approximately horizontally in the switchgear. The horizontal orientation is less efficient in terms of air convection, because the flowing air only extracts heat from a small area of ​​the busbar. Another disadvantage is related to the skin effect of conductors (such as busbars). Due to the skin effect, the current mainly flows through the edges of the busbar, which reduces the effective cross-section for current flow, so the horizontal orientation of the busbar tends to generate more heat. In addition, the horizontal orientation of the busbar reduces the air gap between adjacent phases, which increases the impact of the skin effect.

[0034] According to the present disclosure, a novel busbar that can eliminate the above disadvantages is proposed. In an exemplary embodiment, the mounting surface of the terminal base is arranged parallel to the extension direction of the connecting section of the typical busbar. For example, the connecting section extends along a first direction (hereinafter also referred to as a vertical direction), and the terminal base including at least one mounting surface extends along a second direction perpendicular to the first direction. The terminal mounting surface includes a plurality of connecting portions, which are arranged along the second direction and are configured to receive a plurality of cable terminals. With this configuration, it is possible to improve the efficiency of the terminal base in terms of air convection, because the flowing air only acquires heat from a large area of ​​the busbar.

[0035] The above features and advantages of example embodiments disclosed herein will become more readily understood through the following detailed description with reference to the accompanying drawings.

[0036] Figure 1 is a schematic perspective view of a switchgear 10 according to an example embodiment of the present disclosure. Figure 1 As shown, the switchgear 10 includes a main switch 12, such as a circuit breaker. The main switch 12 is connected to a power source (not shown) via an inlet bus 14. The main switch 12 is also connected to a load (not shown) via an outlet bus 100 (also referred to as a bus). Using the switchgear 10, the load can be selectively connected to the power source by turning on / off the main switch 12. In the example shown, the power source has three phases. It is to be understood that this is only illustrative and not limiting, and the switchgear may include two phases or four phases.

[0037] Figure 2 A close-up view of a busbar 100 for a switchgear is shown. Figure 2 As shown, the outlet bus 100 may include a plurality of connections 114 configured to receive a plurality of cable terminals of cables 150. In the example shown, six cables 150 are secured to the bus 100 for each phase. The six cables 150 may be connected to corresponding loads. Thus, the bus 100 may supply power to six loads via a single main switch 12. It is to be understood that this is merely illustrative and not limiting, and the bus 100 may include any other number of connections, such as 2, 4, 5, 8, 10, 12 or more connections. In some embodiments, as Figure 1 As shown, for each phase, a sensing device 17 (such as a current transformer) is arranged adjacent to the busbar 100 and is configured to detect electrical parameters in the corresponding busbar. These electrical parameters (such as current values) can be used to control the operation of the main switch 12.

[0038] In some embodiments, Figure 2As shown, the busbar 100 includes a connecting section 120 and a terminal base 110. The connecting section 120 extends at least partially along a first direction. When the busbar is arranged in the switchgear and during the use of the switchgear, the first direction corresponds to the vertical direction, that is, the direction of gravity. The connecting section 120 is configured to connect the terminal base 110 to different positions of the switchgear, for example, to the outlet terminal of the main switch 12. The terminal base 110 is configured to receive a plurality of cables 150. The terminal base 110 includes at least one terminal mounting surface 112, which is arranged along a second direction perpendicular to the first direction. During the use of the switchgear, the second direction corresponds to the vertical direction. This means that the terminal mounting surface is vertically oriented. A plurality of connecting portions 114 are provided in sequence on the terminal mounting surface 112 and are configured to receive a plurality of cable terminals of the cable 150.

[0039] By vertically orienting the terminal mounting surface 112 for receiving the cable, the following technical advantages can be achieved. The terminal mounting surface 112 is configured to receive a plurality of connection portions 114. Due to the skin effect, the current tends to flow along the surface of the terminal mounting surface 112. Therefore, the generated heat can be distributed along the entire terminal mounting surface, which is beneficial in terms of heat dissipation. Since the entire terminal mounting surface can therefore be used as a heat dissipation area, the heat dissipation area is enlarged compared to the horizontal arrangement of the terminal base. Moreover, due to the fact that the terminal mounting surface 112 for receiving the cable is vertically oriented, the air flow for cooling the busbar can flow vertically without any obstruction. Therefore, the air convection efficiency can be greatly improved.

[0040] The structural details of the busbar 100 will be referred to Figures 2 to 5 In some embodiments, as Figures 2 to 4 As shown, the busbar 100 includes a connecting section 120 and a terminal base 110. The connecting section 120 includes a vertical section 124 and a horizontal section 126. The vertical section 124 extends vertically from the terminal base 110, and the horizontal section 126 is configured to be connected to the outlet terminal of the main switch (also refer to Figure 1 ). It is to be understood that this is merely illustrative and not limiting. In some embodiments, the horizontal section 126 may be omitted, or the connecting section 120 may be connected to the main switch using any other suitable component. In some embodiments, the transition between the connecting section 120 and the horizontal section 126 is rounded. This is advantageous in reducing electromagnetic intensity. Therefore, a good dielectric field and good dielectric performance may be achieved.

[0041] In some embodiments, the connecting section 120 may be solid. In this case, the heat generated by the terminal base can be transferred away by heat conduction. Figure 2 and 3As shown, the connecting section 120 is in the form of a hollow tube. The connecting section 120 is connected to the bottom air of the terminal base 110. In the case where the connecting section 120 is a hollow tube, the connecting section 120 forms a flue extending from the terminal base. In this case, in addition to heat conduction, the heat generated by the terminal base can also be transferred out by air convection. In particular, due to the flue effect of the air flow, the heat dissipation performance of the connecting section 120 can be greatly improved.

[0042] In some embodiments, Figures 2 to 4 As shown, the connecting section 120 is in the shape of a hollow cylindrical tube. Due to the cylindrical shape, this is advantageous in reducing the electromagnetic intensity. Therefore, the dielectric field and dielectric performance can be further improved. It should be understood that this is only illustrative and not limiting. The connecting section 120 can be any other suitable shape. In some embodiments, as Figure 3 As shown (also refer to Figure 1 ), the hollow tube includes a vertically oriented opening 122. The vertically oriented opening 122 is configured to form an outlet of a flue. With the vertically oriented opening 122, the flue effect formed by the connecting section 120 can be further improved. Therefore, the heat dissipation performance can be further improved.

[0043] In some embodiments, Figures 2 to 4 As shown, the terminal base 110 may include two terminal base segments formed as a whole, and respectively define a vertically oriented terminal mounting surface 112. In the example shown, the vertically oriented side surfaces of the terminal base segments form the terminal mounting surface 112. In the example shown, there are two terminal base segments extending side by side in the horizontal direction. The vertically oriented side surfaces of each terminal base segment in the terminal base segment form the terminal mounting surface. In this case, the number of cables connected to the terminal base 110 can be increased. In some embodiments, the two terminal base segments are formed as a whole. In this way, the contact resistance can be reduced. In the case where the two terminal base segments extend side by side in the horizontal direction, an open spacing can be formed between the two terminal base segments. The open spacing is vertically oriented and can be used as an air flow path for air convection.

[0044] In the example shown, each of the terminal base segments includes three connecting portions 114. In the example shown, the connecting portions 114 are in the form of holes. Figure 2 As shown, the cable terminal 152 of the cable 150 can be fixed to the connecting portion 114, for example, via a screw. It is understood that the number of connecting portions is illustrative and not limiting. It is also understood that the connecting portion is shown as a hole, which is only illustrative and not limiting, and the connecting portion can be any other suitable component.

[0045] The connecting section 120 can be fixed to the terminal base 110 by various methods. Figures 2 to 4 As shown, the terminal base 110 also includes an integrally formed extension 118, and the connecting section 120 is attached to the terminal base at the extension 118. In the example shown, the extension 118 is a horizontal extension and extends across two terminal base sections. It is to be understood that this is merely illustrative and not restrictive, and the extension 118 can be arranged at any other suitable position and can be any other suitable shape, as long as the connecting section 120 can be fixed to the terminal base 110 via the extension while ensuring that the connecting section, the extension and the terminal base section are integrally formed.

[0046] In some embodiments, Figure 4 As shown, a hole 117 is provided in the terminal base 110 and is configured to receive the end of the hollow cylindrical tube. For example, if necessary, the connecting section 120 can be fixed to the terminal base 110 through the hole 117 in combination with a fixing device such as a screw, a bolt, etc. In some embodiments, the extension 118 can also include at least one through hole 115, and at least one through hole 115 penetrates the extension 118. During operation of the switchgear, the through hole 115 can be used for air circulation. In this way, the heat dissipation performance of the terminal base is further improved.

[0047] In some embodiments, Figure 4 As shown, the terminal base 110 also includes an integrally formed support portion 119. The support portion 119 is configured to receive a support insulator 130, which is used to support the busbar. Due to the fact that the cable is usually very heavy and the terminal base 110 itself is also very heavy, the terminal base 110 is subject to a large gravity. The support portion 119 can be used to arrange the support insulator 130 for supporting the busbar. In this way, the strength of the terminal base can be improved. The support portion 119 is integrally formed with the terminal base 110 and can connect two terminal base sections together. Due to this arrangement, the connection point does not cause power loss. In the example shown, the support portion 119 is arranged horizontally. It is to be understood that this is merely illustrative and not restrictive, for example, the support portion 119 can be arranged laterally.

[0048] In some embodiments, Figures 2 to 4 As shown, the terminal base 110 is basically open except for structural features (such as horizontal extension 118 and support portion 119). This open configuration helps to promote air convection. In some embodiments, the terminal base segment includes a circular portion 113. For example, the circular portion 113 is provided at the edge of the terminal base segment. Using these circular portions 113, the dielectric field and dielectric performance can be further improved.

[0049] In some embodiments, Figure 4 As shown, the terminal base 110 may further include a heat sink 140. When the terminal base 110 includes two terminal base sections and the cable 150 carried by the terminal base 110 increases, it is advantageous to provide the heat sink 140. In the example shown, the heat sink 140 is disposed between the two terminal base sections and is configured to be in thermal contact with the terminal mounting surface 112. In this case, the heat generated by the terminal base 110 can be absorbed by the heat sink 140, thereby reducing the temperature of the terminal base 110.

[0050] Heat sink 140 can take various forms. In some embodiments, Figure 5 As shown, the heat sink 140 includes a main body 142 and a plurality of fins 144 extending from the main body. The shape of the fins 144 is a shape that facilitates air circulation in the vertical direction. Figure 5 As shown, the surface area of ​​the fins decreases from the top side to the bottom side as viewed in a direction perpendicular to the terminal mounting surface 112. The air flow path formed by two adjacent fins widens from the bottom side to the top side. In this way, the heat absorbed by the heat sink 140 can be easily transferred out by air convection. In some embodiments, as Figure 5 As shown, the edges of the fins 144 are rounded. This is advantageous in reducing electromagnetic intensity. Therefore, the dielectric field and dielectric performance can be further improved. In some embodiments, the heat sink 140 can be made of a good thermal conductive material such as aluminum.

[0051] Figure 6 FIG. 2 is a schematic perspective view of a busbar 200 for a switchgear according to another exemplary embodiment of the present disclosure. Figure 6 As shown, the busbar 200 includes a connecting section 220 and a terminal base 210. The connecting section 220 extends substantially in a vertical direction and is connected to other components of the switchgear, such as an intermediate element, which is also connected to an outlet terminal (not shown) of the main switch. The terminal base 210 is configured to receive a plurality of cables (not shown).

[0052] like Figure 6 As shown, the terminal base 110 includes a vertically oriented terminal mounting surface 212. A plurality of connection portions 214 are provided on the terminal mounting surface 212 and are configured to receive a plurality of cable terminals. In the example shown, the connection portion 214 is in the form of a hole for receiving a fastener, such as a screw, a bolt, etc. It is to be understood that this is merely illustrative and not limiting, and the connection portion 214 may be in any other suitable form as long as the cable can be fixed to the connection portion 214.

[0053] The vertical arrangement of the terminal mounting surface 212 increases the air gap between the phases, which further reduces the impact of the skin effect. Moreover, due to the skin effect, the current mainly flows along the terminal mounting surface 212, and this means that a larger area is used for heat dissipation. The current density is lower and less heat is generated.

[0054] In some embodiments, Figure 6 As shown, the connection portion 214 is a countersunk hole and a countersunk bolt can be used. In this way, a relatively "smooth" surface can be formed from the outside, thereby generating a good dielectric field and good dielectric properties.

[0055] In some embodiments, Figure 6 As shown, the terminal base 210 includes an integrally formed terminal base section, and the vertical side surface of the integrally formed terminal base section forms a terminal mounting surface. Since the terminal base section is integrally formed, the contact resistance of the terminal base 210 is reduced.

[0056] In some embodiments, Figure 6 As shown, the terminal base segment includes a first end 215, a second end 217 opposite to the first end 215, and a bent portion 218 located at the second end 217. The terminal base segment can be fixed to the connecting segment 220 via the bent portion 218. It is to be understood that the bent portion 218 is only illustrative and not limiting, and the bent portion 218 can be any other appropriate form as long as the terminal base segment can be fixed to the connecting segment 220.

[0057] In some embodiments, Figure 6 As shown, the connecting section 220 includes a support portion 219. The support portion 219 is configured to receive a support insulator 230, which is used to support the busbar. The support insulator 230 can be fixed to the frame 25 of the switchgear. In this way, the structural strength of the busbar can be improved. In the example shown, the support portion 219 is arranged adjacent to the second end 217. It is to be understood that this is merely illustrative and not limiting, and the support portion 219 can be located in any other suitable position.

[0058] Figure 7 and 8 A schematic perspective view of a terminal base 210', 210" for a busbar of a switchgear is shown. In the example shown, the cross-sectional area of ​​the terminal base segment 210', 210" decreases from a first end 215', 215" towards a second end 217', 217". Figure 7 The terminal base 210' is similar to Figure 8 The terminal base 210". Figure 7 In the embodiment, the cross-sectional area of ​​the terminal base section 210' gradually decreases, and in Figure 8In the embodiment, the cross-sectional area of ​​the terminal base segment 210' is gradually reduced. Due to the improved heat dissipation performance, the terminal base 210', 210" can be effectively cooled. This makes it possible to further reduce the material of the terminal base 210', 210". In the example shown, the cross-sectional area of ​​the terminal base segment 210', 210" decreases from the proximal end of the power supply to the distal end of the power supply. In some embodiments (not shown), the terminal base segment can be formed by a laminated conductor. In this case, the thickness of the terminal base segment can decrease from the proximal end of the power supply to the distal end of the power supply. In this way, the cost for producing the busbar can be reduced without compromising the performance of the busbar.

[0059] Fig. 9 is a schematic perspective view of a busbar 300 for a switchgear according to another example embodiment of the present disclosure. Fig. 9 The busbar 300 in is similar to Figure 6 Components denoted by similar reference numerals are substantially the same, and the following description will focus on their differences.

[0060] like Fig. 9 As shown, the busbar 300 includes a connection section 320 and a terminal base 310. The connection section 320 extends substantially in a vertical direction and is connected to other components of the switchgear, such as an outlet terminal (not shown) connected to a main switch. The terminal base 310 includes two vertically oriented terminal mounting surfaces 312. A plurality of connection portions 314 are provided on the terminal mounting surfaces 312 and are configured to receive a plurality of cable terminals.

[0061] The terminal base 210 includes two terminal base sections arranged side by side. The vertical side surface of each terminal base section forms a corresponding terminal mounting surface. Fig. 9 As shown, the terminal base segment includes a first end 315, a second end 317 opposite to the first end 315, and a bent portion 318 at the second end 317. The terminal base segment may be fixed to the connection segment 320 via the bent portion 318.

[0062] In some embodiments, Fig. 9 As shown, the connecting section 320 includes a support portion 319. The support portion 319 is configured to receive a support insulator 230, which is used to support the busbar. The support insulator 230 may be fixed to the frame 25 of the switchgear.

[0063] In some embodiments, Fig. 9As shown, the terminal base 310 may also include a heat sink 340. When the terminal base 310 includes two terminal base sections for carrying cables, it is advantageous to provide a heat sink 340. In the example shown, the heat sink 340 is disposed between the two terminal base sections and is configured to be in thermal contact with the terminal mounting surface 312. In this case, the heat generated by the terminal base 310 can be absorbed by the heat sink 340, thereby reducing the temperature of the terminal base 310. In the example shown, the heat sink 340 includes a plurality of fins. It is to be understood that this is merely illustrative and not limiting, and the heat sink may be in any suitable form.

[0064] By the teachings provided herein in the above description and the related drawings, those skilled in the art to which the present disclosure belongs will understand many modifications and other embodiments of the present disclosure given herein. Therefore, it is to be understood that the embodiments of the present disclosure are not limited to the specific embodiments of the present disclosure, and modifications and other embodiments are intended to fall within the scope of the present disclosure. In addition, although exemplary embodiments have been described in the context of some illustrative combinations of components and / or functions in the above description and the related drawings, it should be appreciated that different combinations of components and / or functions can be provided in alternative embodiments without departing from the scope of the present disclosure. In this regard, it is expected that other combinations of components and / or functions different from those explicitly described above will also fall within the scope of the present disclosure. Although specific terms are used herein, they are only used in a general and descriptive sense, and are not restrictive.

Claims

1. A busbar (100, 200, 300) for a switchgear, comprising: A connecting section (120, 220, 320) extending at least partially in a first direction; as well as A terminal base (110, 210, 310) extends in a second direction perpendicular to the first direction and is electrically connected to the connecting section, the terminal base (110, 210, 310) comprising at least one terminal mounting surface (112, 212, 312), the at least one terminal mounting surface being arranged along the first direction, the terminal mounting surface comprising a plurality of connecting portions (114, 214, 314), the plurality of connecting portions being arranged along the second direction and being suitable for receiving a plurality of cable terminals (152).

2. The busbar according to claim 1, wherein the terminal base (110, 210, 310) comprises an integrally formed terminal base section, a side surface of the integrally formed terminal base section forming the terminal mounting surface.

3. The busbar according to claim 2, wherein the terminal base section comprises a first end (215), a second end (217) opposite to the first end, and a bent portion (218) at the second end, and the terminal base section is fixed to the connecting section (220) via the bent portion.

4. The busbar according to claim 3, wherein a cross-sectional area or thickness of the terminal base section (210) decreases from the first end (215) toward the second end (217).

5. The busbar according to claim 3 or 4, wherein the connecting section (220) comprises a support portion (219) adjacent to the first end (215) and adapted to receive a support insulator (230) supporting the busbar.

6. The busbar according to claim 1, wherein the terminal base includes two terminal base sections, which are integrally formed and extend in the second direction, and each of the terminal base sections includes a side surface that forms the terminal mounting surface.

7. The busbar according to claim 6, wherein the terminal base further comprises a heat sink (140, 340) arranged between the two terminal base sections to be in thermal contact with the terminal mounting surface.

8. The busbar of claim 7, wherein the heat sink (140) comprises a body (142) and a plurality of fins (144) extending from the body, a surface area of ​​a fin of the plurality of fins decreasing from a top side to a bottom side.

9. The busbar according to claim 6, wherein the terminal base further comprises an extension (118) extending across the two terminal base sections, and the connecting section (120) is attached to the terminal base at the extension (118).

10. The busbar according to claim 9, wherein the extension portion (118) further comprises at least one through hole (115) penetrating the extension portion to circulate air.

11. The busbar according to claim 10, wherein the connecting section (120) comprises a hollow tube, the hollow tube being in air communication with the open space between the two terminal base sections, the hollow tube forming a flue extending from the terminal base.

12. The busbar of claim 11, wherein the hollow tube comprises a vertically oriented opening (122) to form an outlet for the flue.

13. The busbar according to any one of claims 6 to 12, wherein the terminal base further comprises a support portion (119) between the two terminal base sections, the support portion being adapted to receive a support insulator (130) supporting the busbar.

14. The busbar according to any one of claims 1 to 4 and 6 to 12, wherein an end of the terminal mounting surface is rounded.

15. A switch device (10), comprising: a main switch (12), and A busbar (100, 200, 300) according to any one of claims 1 to 14, connected to an outlet terminal of the main switch (12).

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