A high-efficiency heat-dissipation feeder bus duct

Abstract

The utility model relates to the field of electrical technology especially, it relates to a high -efficient heat dissipation's feeder bus duct, it includes with from top to bottom in turn of A phase, B phase, C phase and N phase wire conductor and respectively located wire conductor both sides left side plate and right side plate, feeder bus duct still includes: heat conduction plate, part between C phase and N phase of wire conductor, heat conduction plate both ends respectively extend to with two side plate contact. The utility model has improved the heat dissipation effect of the role of the existing feeder bus duct.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, and in particular to a feeder busbar trunking with high efficiency in heat dissipation. Background Technology

[0002] Busbar trunking is a high-efficiency, high-current power distribution device that replaces traditional cables. Its core function is to reliably transmit electrical energy from the power source to the load. Typical applications include power transmission from transformers to low-voltage distribution cabinets, and power distribution from distribution cabinets to floor distribution units or large electrical equipment. Compared to cables with the same current carrying capacity, busbar trunking offers significant advantages such as high current carrying capacity, compact structure, modular installation, convenient maintenance, and high reliability. It is particularly suitable for high-current-density power distribution applications such as factories, data centers, large commercial buildings, and airports.

[0003] Feeder busbars serve as the main transmission lines in power distribution systems, undertaking the task of transmitting large-capacity electrical energy. They draw power from the main transformer or main low-voltage switchgear and deliver it to regional distribution centers, floor-level switchgear, or the incoming lines of large equipment. This structure is specifically designed to carry high rated currents, with typical applications covering currents ranging from hundreds to thousands of amperes, making it a core component supporting high-current power distribution networks.

[0004] Because feeder bus trunking needs to continuously carry extremely high currents, the heat generated by its internal conductors is also enormous. Therefore, "efficient heat dissipation" is a very critical performance indicator for feeder bus trunking to ensure safe operation, temperature rise that meets standards, and extended lifespan. Utility Model Content

[0005] In view of this, this application provides a high-efficiency heat dissipation feeder bus trunking, mainly used to improve the heat dissipation effect of existing feeder bus trunking.

[0006] The present invention provides a high-efficiency heat dissipation feeder busbar trunking with the following technical solution:

[0007] A high-efficiency heat dissipation feeder busbar trunking includes a line conductor having an A phase, a B phase, a C phase, and an N phase stacked from top to bottom, and a left side plate and a right side plate located on both sides of the line conductor. The feeder busbar trunking also includes a heat-conducting plate, which is partially located between the C phase and the N phase of the line conductor, and the two ends of the heat-conducting plate extend to contact the two side plates.

[0008] By adopting the above technical solution, a highly efficient heat dissipation path is constructed from the core heating area of ​​the conductor to the side plates by setting a partially extended heat-conducting plate between the C and N phases in the conductor of the feeder busbar, with both ends of the heat-conducting plate directly contacting the left and right side plates. This design utilizes the relatively low electromagnetic interference environment between the C and N phases to avoid the eddy current loss problem caused by adding heat-conducting structures between the A / B / C phases. At the same time, the direct contact between the heat-conducting plate and the side plates quickly conducts heat to the external heat dissipation surface, significantly reducing the temperature rise of the conductor and improving its current carrying capacity. In addition, the local arrangement of the heat-conducting plate between the C and N phases takes into account the insulation safety distance requirements inside the busbar, without the need to increase the interphase spacing. While achieving efficient heat dissipation, it maintains the compact structure of the feeder busbar, extends the service life of the insulation material, and reduces energy consumption.

[0009] Optionally, the feeder busbar trunking further includes an upper cover plate covering the outer side of phase A of the conductor and a lower cover plate covering the outer side of phase N, wherein the two ends of the upper cover plate extend and are respectively connected to the left side plate and the right side plate, and the two ends of the lower cover plate extend and are respectively connected to the left side plate and the right side plate; wherein the heat-conducting plate is configured with a preset shape so that the end of the heat-conducting plate can be closer to the left side plate or the right side plate and cover the end of the conductor.

[0010] By adopting the above technical solution, by adding an upper cover plate covering the outside of phase A of the conductor and a lower cover plate covering the outside of phase N, and extending both ends of the upper cover plate to connect the left and right side plates, a fully enclosed heat dissipation shell structure is formed, which significantly improves the overall heat diffusion efficiency of the busbar trunking. At the same time, the heat-conducting plate is designed with a preset shape, so that its end is closer to the left or right side plate and completely covers the end of the conductor, which specifically enhances the heat conduction capacity between the end of the conductor and the left and right side plates. This collaborative design forms a three-dimensional heat dissipation structure through the axial heat conduction of the upper and lower cover plates and the radial heat conduction of the preset shaped heat-conducting plate. While maintaining the original compact layout of the busbar trunking, it improves its heat dissipation efficiency and effectively solves the problem of accelerated aging of the end insulation material due to local high temperature.

[0011] Optionally, the heat-conducting plate has a preset shape of I-beam and includes: a heat-conducting support plate located between the C phase and the N phase of the wire conductor; a left heat-conducting support plate located between the left side plate and the wire conductor; and a right heat-conducting support plate located between the right side plate and the wire conductor.

[0012] By adopting the above technical solution, a three-dimensional heat dissipation frame is formed by coordinating the left and right heat-conducting support plates located between the C and N phases of the conductor: the heat-conducting support plates directly dissipate heat between the C and N phases, while the left and right heat-conducting support plates bridge the left and right side plates to the end areas of the conductors, respectively, and dissipate heat from those areas. This I-shaped structure increases the surface area of ​​the heat-conducting plate. Furthermore, the mechanical interlocking between the I-shaped heat-conducting plate and the left and right heat-conducting support plates enhances the vibration resistance of the busbar trunking and prevents contact failure due to thermal expansion and contraction.

[0013] Optionally, the heat-conducting plate includes an upper heat-conducting plate and a lower heat-conducting plate; the upper heat-conducting plate has a preset shape of U-shape and includes an upper heat-conducting support plate located between the C phase and N phase of the conductor, and two upper heat-conducting support plates located between the A phase, B phase, and C phase of the conductor, and the left and right side plates, respectively; the lower heat-conducting plate has a preset shape of U-shape and includes a lower heat-conducting support plate located between the C phase and N phase of the conductor, and two lower heat-conducting support plates located between the N phase of the conductor, and the left and right side plates, respectively.

[0014] By adopting the above technical solution, the upper heat-conducting support plate is precisely positioned between the C phase and N phase of the conductor. At the same time, two upper heat-conducting support plates cover the axial space between the A phase, B phase, C phase and the left and right side plates, respectively. The synchronously configured lower heat-conducting support plate works in conjunction with the lower heat-conducting support plates located on both sides of the N phase to form a three-dimensional heat dissipation system that echoes each other. The upper heat-conducting support plate strengthens the axial heat dissipation path for the high-heat-generating three-phase conductors, while the lower heat-conducting support plate focuses on heat removal from the N phase area, realizing zoned temperature control of the three-phase conductors and the neutral line.

[0015] Optionally, the wire conductor may further include a PE wire located between the N phase and the lower cover plate.

[0016] Optionally, an insulating layer is filled between phase A and phase B of the conductor, as well as between phase B and phase C.

[0017] Optionally, the A, B, and C phases of the conductor are copper or aluminum layers.

[0018] Optionally, the heat-conducting plate is a copper plate or an aluminum alloy plate.

[0019] Optionally, the space between the C phase and N phase of the wire conductor and the heat-conducting plate is filled with a highly thermally conductive insulating film made of at least one of aluminum nitride ceramic sheets, thermally conductive silicone pads, and thermally conductive silicone grease.

[0020] Optionally, the PE wire is made of the same material as phases A, B, and C of the wire conductor.

[0021] In summary, this utility model has at least one of the following beneficial technical effects: 1. By installing a partially extended heat-conducting plate between the C-phase and N-phase conductors in the feeder busbar trunking, and ensuring that both ends of the heat-conducting plate directly contact the left and right side plates, an efficient heat dissipation path is constructed from the core heating area of ​​the conductor to the side plates. This design utilizes the relatively low electromagnetic interference environment between the C-phase and N-phase, avoiding the eddy current loss problem caused by adding heat-conducting structures between the three-phase conductors. At the same time, the direct contact between the heat-conducting plate and the side plates rapidly conducts heat to the external heat dissipation surface, significantly reducing the temperature rise of the conductor and improving its current carrying capacity. In addition, the local arrangement of the heat-conducting plate between the C-phase and N-phase also takes into account the insulation safety distance requirements inside the busbar trunking, without the need to increase the interphase spacing. This achieves efficient heat dissipation while maintaining the compact structure of the feeder busbar trunking, extending the service life of the insulation material and reducing energy consumption. 2. By adding an upper cover plate on the outside of phase A of the conductor and a lower cover plate on the outside of phase N, and extending both ends of the upper cover plate to connect the left and right side plates, a fully enclosed heat dissipation shell structure is formed, which significantly improves the overall heat diffusion efficiency of the busbar trunking. At the same time, the heat-conducting plate is designed with a preset shape so that its end is closer to the left or right side plate and completely covers the end of the conductor, which specifically enhances the heat conduction capacity between the end of the conductor and between the left and right side plates. This collaborative design forms a three-dimensional heat dissipation structure through the axial heat conduction of the upper and lower cover plates and the radial heat conduction of the preset shaped heat-conducting plate. While maintaining the original compact layout of the busbar trunking, it improves its heat dissipation efficiency and effectively solves the problem of accelerated aging of the end insulation material due to local high temperature. 3. A three-dimensional heat dissipation frame is formed by connecting the left and right heat-conducting support plates via a heat-conducting support plate located between the C and N phases of the conductor. The heat-conducting support plate directly dissipates heat between the C and N phases, while the left and right heat-conducting support plates bridge the left and right side plates to the end areas of the conductor, respectively, and dissipate heat from those areas. This I-shaped structure increases the surface area of ​​the heat-conducting plate. Furthermore, the mechanical interlocking between the I-shaped heat-conducting plate and the left and right heat-conducting support plates enhances the busbar's vibration resistance and prevents contact failure due to thermal expansion and contraction. 4. The upper thermally conductive support plate is precisely positioned between the C-phase and N-phase conductors. At the same time, two upper thermally conductive support plates cover the axial space between the A-phase, B-phase, C-phase and the left and right side plates, respectively. The lower thermally conductive support plate, which is configured synchronously, works in conjunction with the lower thermally conductive support plates located on both sides of the N-phase to form a three-dimensional heat dissipation system that echoes each other. The upper thermally conductive support plate strengthens the axial heat dissipation path for the high-heat-generating three-phase conductors, while the lower thermally conductive support plate focuses on heat removal from the N-phase region, realizing zoned temperature control of the three-phase conductors and the neutral line. Attached Figure Description

[0022] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application are illustrated by way of example and not limitation, and the same or corresponding reference numerals denote the same or corresponding parts, wherein: Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application; Figure 2 This is a schematic diagram illustrating the structure of the conductor in this application; Figure 3 This is a cross-sectional view of the heat-conducting plate in Embodiment 1 of this application; Figure 4 This is a cross-sectional view of the heat-conducting plate in Embodiment 2 of this application.

[0023] Explanation of reference numerals in the attached figures: 1. Heat-conducting plate; 11. Heat-conducting support plate; 12. Left heat-conducting support plate; 13. Right heat-conducting support plate; 14. Upper heat-conducting main plate; 141. Upper heat-conducting support main plate; 142. Upper heat-conducting support plate; 15. Lower heat-conducting main plate; 151. Lower heat-conducting support main plate; 152. Lower heat-conducting support plate; 2. Top cover plate; 3. Lower cover plate; 100. Feeder busbar trunking; 110. Line conductor; 111. Phase A; 112. Phase B; 113. Phase C; 114. Phase N; 115. PE line; 120. Left side plate; 130. Right side plate. Detailed Implementation

[0024] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0025] This utility model discloses a feeder busbar trunking with high-efficiency heat dissipation.

[0026] Example 1 Reference Figure 1 as well as Figure 2The feeder busbar 100 of this application includes conductors 110 having A-phase 111, B-phase 112, C-phase 113, and N-phase 114 stacked sequentially from top to bottom, and a left side plate 120 and a right side plate 130 located on both sides of the conductors 110. The A-phase 111, B-phase 112, and C-phase 113 of the conductors 110 transmit three-phase alternating current, with a phase difference of 120° between them. In the following description, the A-phase 111, B-phase 112, and C-phase 113 of the conductors 110 may also be collectively referred to as the three-phase conductors. To ensure the service life of the three-phase conductors, the three-phase conductors are preferably copper or aluminum layers, and insulating layers are filled between A-phase 111 and B-phase 112, and between B-phase 112 and C-phase 113.

[0027] The N-phase 114 of conductor 110 is a neutral conductor, whose main function is to provide a return path for unbalanced current in the three-phase conductors. Ideally, the voltage of N-phase 114 to ground is approximately 0V, but in actual operation, a small voltage exists in N-phase 114 due to the unbalanced current in the three-phase conductors. The space between conductor 110's C-phase 113, N-phase 114, and the heat-conducting plate 1 is filled with a highly thermally conductive insulating film made of at least one of aluminum nitride ceramic sheets, thermally conductive silicone pads, and thermally conductive grease.

[0028] The feeder busbar trunking 100 also includes a heat-conducting plate 1 located between the C phase 113 and N phase 114 of the conductor 110, with both ends of the heat-conducting plate 1 extending to contact the two side plates. The heat-conducting plate 1 is made of copper or aluminum alloy.

[0029] By setting a partially extended heat-conducting plate 1 between the C-phase 113 and N-phase 114 in the conductor 110 of the feeder busbar 100, and ensuring that both ends of the heat-conducting plate 1 directly contact the left side plate 120 and the right side plate 130, an efficient heat dissipation path is constructed from the heat-generating core area of ​​the conductor 110 to the side plates. This design utilizes the relatively low electromagnetic interference environment between the C-phase 113 and N-phase 114 to avoid the eddy current loss problem caused by adding heat-conducting structures between the A / B / C phases 113. At the same time, the direct contact between the heat-conducting plate 1 and the side plates rapidly conducts heat to the external heat dissipation surface, significantly reducing the temperature rise of the conductor 110 and improving its current carrying capacity. In addition, the partial arrangement of the heat-conducting plate 1 between the C-phase 113 and N-phase 114 takes into account the internal insulation safety distance requirements of the busbar, without the need to increase the interphase spacing. While achieving efficient heat dissipation, it maintains the compact structure of the feeder busbar 100, extends the service life of the insulation material, and reduces energy consumption.

[0030] The feeder busbar 100 also includes an upper cover plate 2 covering the outside of the A phase 111 of the conductor 110 and a lower cover plate 3 covering the outside of the N phase 114. The two ends of the upper cover plate 2 extend and are connected to the left side plate 120 and the right side plate 130, respectively. The two ends of the lower cover plate 3 extend and are connected to the left side plate 120 and the right side plate 130, respectively. The heat-conducting plate 1 is configured with a preset shape so that the end of the heat-conducting plate 1 can be closer to the left side plate 120 or the right side plate 130 and cover the end of the conductor 110.

[0031] By adding an upper cover plate 2 covering the outside of phase A 111 of conductor 110 and a lower cover plate 3 covering the outside of phase N 114, and extending both ends of the upper cover plate 2 to connect the left side plate 120 and the right side plate 130, a fully enclosed heat dissipation shell structure is formed, which significantly improves the overall heat diffusion efficiency of the busbar trunking. At the same time, the heat-conducting plate 1 is designed with a preset shape so that its end is closer to the left side plate 120 or the right side plate 130 and completely covers the end of conductor 110, which specifically enhances the heat conduction capacity between the end of conductor 110 and the left side plate 120 and the right side plate 130. This collaborative design forms a three-dimensional heat dissipation structure through the axial heat conduction of the upper cover plate 2 and the lower cover plate 3 and the radial heat conduction of the preset shaped heat-conducting plate 1. While maintaining the original compact layout of the busbar trunking, it improves its heat dissipation efficiency and effectively solves the problem of accelerated aging of the end insulation material due to local high temperature.

[0032] Reference Figure 3 The heat-conducting plate 1 has a preset shape of I-beam and includes: a heat-conducting support plate 11 located between the C phase 113 and the N phase 114 of the wire conductor 110; a left heat-conducting support plate 12 located between the left side plate 120 and the wire conductor 110; and a right heat-conducting support plate 13 located between the right side plate 130 and the wire conductor 110.

[0033] A three-dimensional heat dissipation frame is formed by the thermally conductive support plate 11 located between phase C 113 and phase N 114 of conductor 110, which coordinates with the left thermally conductive support plate 12 and the right thermally conductive support plate 13. The thermally conductive support plate 11 directly conducts heat between phase C 113 and phase N 114, while the left and right thermally conductive support plates 12 and 13 respectively bridge the end regions of the left and right side plates 120 and conductor 130 and conduct heat from these regions. This I-shaped structure increases the surface area of ​​the thermally conductive plate 1. At the same time, the mechanical interlocking of the thermally conductive support plate 11 with the left and right thermally conductive support plates 12 and 13 enhances the vibration resistance of the busbar trunking and prevents contact failure due to thermal expansion and contraction.

[0034] Reference Figure 1 and Figure 2 The conductor 110 also includes a PE wire 115 located between the N phase and the lower cover plate 3. Figure 1This is a three-dimensional structural diagram of conductor 110, omitting the PE line 115. Figure 2 This is a three-dimensional structural diagram of the PE wire 115 in the conductor. The PE wire 115 is a protective grounding wire, and its material should be the same as that of the three-phase conductors.

[0035] Example 2 The difference between Embodiment 2 and Embodiment 1 lies in the arrangement of the heat-conducting plate 1 in Embodiment 2, as detailed below: Reference Figure 4 The heat-conducting plate 1 includes an upper heat-conducting plate 14 and a lower heat-conducting plate 15. The upper heat-conducting plate 14 has a preset shape of U-shape and includes an upper heat-conducting support plate 141 located between the C phase 113 and N phase 114 of the conductor 110, and two upper heat-conducting support plates 142 located between the A phase 111, B phase 112 and C phase 113 of the conductor 110, and between the left side plate 120 and the right side plate 130, respectively. The lower heat-conducting plate 15 has a preset shape of U-shape and includes a lower heat-conducting support plate 151 located between the C phase 113 and N phase 114 of the conductor 110, and two lower heat-conducting support plates 152 located between the N phase 114 of the conductor 110, and between the left side plate 120 and the right side plate 130, respectively.

[0036] The upper thermally conductive support plate 141 is precisely positioned between the C phase 113 and N phase 114 of the conductor 110. At the same time, two upper thermally conductive support plates 142 respectively cover the axial space between the A phase 111, B phase 112, C phase 113 and the left side plate 120 and right side plate 130. The lower thermally conductive support plate 151, which is configured synchronously, works in conjunction with the lower thermally conductive support plates 152 located on both sides of the N phase 114 to form a three-dimensional heat dissipation system that echoes each other from top to bottom. The upper thermally conductive support plate 14 strengthens the axial heat dissipation path for the high-heat-generating three-phase conductors, while the lower thermally conductive support plate 15 focuses on the heat dissipation of the N phase 114 area, realizing the zoned temperature control of the three-phase conductors and the neutral line.

[0037] In the foregoing description of this application, unless otherwise expressly specified and limited, the terms "fixed," "installed," "connected," or "linked" should be interpreted broadly. For example, the term "linked" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can refer to the internal communication of two components or the interaction between two components. Therefore, unless otherwise expressly limited in this application, those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] Based on the above description of this application, those skilled in the art will also understand that the terms used, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "axial," and "radial," which indicate orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings of this application. They are only for the purpose of facilitating the explanation of the solution of this application and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as a limitation on the solution of this application.

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