High-strength connectorless dual-power bus duct

Abstract

The application discloses a high-strength connector-free dual-power bus duct and relates to the technical field of bus ducts. The high-strength connector-free dual-power bus duct comprises a tray, a main power supply, a standby power supply, an N-phase conductor and a PE-phase conductor, wherein the tray is provided with a plurality of placement grooves distributed at intervals; the main power supply comprises a first A-phase conductor, a first B-phase conductor and a first C-phase conductor; the standby power supply comprises a second A-phase conductor, a second B-phase conductor and a second C-phase conductor; the N-phase conductor and the PE-phase conductor are sequentially placed in the corresponding placement grooves; and an insulation clamping piece is arranged above the main power supply, the standby power supply, the N-phase conductor and the PE-phase conductor, and the insulation clamping piece is provided with a plurality of insulation clamping blocks, and every two adjacent conductors are separated by the insulation clamping blocks. The high-strength connector-free dual-power bus duct can improve the stability and safety of the bus duct.

Description

Technical Field

[0001] This invention relates to the field of busbar technology, and in particular to a high-strength connectorless dual-power busbar. Background Technology

[0002] Currently, for low-voltage power distribution systems with currents exceeding 100A, power transmission trunk lines primarily utilize cables or busbars. Cables and traditional busbars present the following problems: For cables, most projects currently use enclosed cable trays. There is no ventilation inside the cable trays, so heat cannot be dissipated, resulting in a decrease in current carrying capacity. In many projects, the heat causes the insulation material of the cable to age faster, shortening the service life of the cable and seriously causing short circuits and electrical fires.

[0003] Compared to cables, busbar trunking has a higher current-carrying capacity, up to 6300A, and this capacity is verified through full-load testing. Therefore, most buses with a capacity of 400A or higher use busbar trunking. However, in recent years, there have been many accidents involving busbar trunking in engineering projects. More than 80% of these accidents are related to the busbar trunking connections. The main causes include water ingress, overheating, insufficient current-carrying capacity of the connectors, moisture, condensation, loose bolts, and damage to the insulation layer during installation, all of which can lead to short circuits at the connections.

[0004] Furthermore, with the advent of the era of artificial intelligence, industrial production, hospitals, offices, and homes have increasingly higher requirements for the stability of low-voltage power distribution. Current low-voltage power distribution systems are all powered by a single power source. If an accident occurs, the power outage will last for at least a few hours, or even 2 to 3 days, which will seriously affect production and people's work and life. Summary of the Invention

[0005] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a high-strength connectorless dual-power busbar trunking, which can improve the stability and safety of the busbar trunking.

[0006] The high-strength connectorless dual-power busbar trunking according to an embodiment of the present invention includes: The tray is provided with multiple spaced-apart placement slots; The main power supply includes a first phase A conductor, a first phase B conductor, and a first phase C conductor; Backup power supply, including second phase A conductor, second phase B conductor and second phase C conductor; N-phase conductor; The PE phase conductor, wherein the first A phase conductor, the first B phase conductor, the first C phase conductor, the N phase conductor, the second A phase conductor, the second B phase conductor, the second C phase conductor, and the PE phase conductor are placed sequentially in the corresponding placement slots; An insulating clip is fitted over the main power supply, the backup power supply, the N-phase conductor, and the PE-phase conductor. The insulating clip has multiple insulating blocks, and each pair of adjacent conductors is separated by the insulating blocks.

[0007] According to some embodiments of the present invention, a shock-absorbing pad is also included, which is disposed in the tray. The main power supply, the backup power supply, the N-phase conductor, and the PE-phase conductor are all placed on the shock-absorbing pad, and the shock-absorbing pad is connected to the insulating clip by fasteners.

[0008] According to some embodiments of the present invention, the first phase A conductor comprises: Multilayer copper strip conductors stacked together; The first copper strip wrapping layer wraps the multi-layer copper strip conductor; The first insulating layer wraps around the first copper strip wrapping layer; A first metal armor protective layer surrounds the first insulating layer; The first protective layer encloses the first metal armor protective layer.

[0009] According to some embodiments of the present invention, the first phase A conductor comprises: Flexible aluminum conductor; A second insulating layer encapsulates the flexible aluminum conductor; A second metal armor protective layer surrounds the second insulating layer; The second protective layer encases the second metal armor protective layer.

[0010] According to some embodiments of the present invention, a plurality of protrusions are provided on the upper part of the insulating card, a plurality of card slots are provided on the bottom of the tray, the card slots are staggered with the placement slots, and the protrusions are adapted to the card slots.

[0011] According to some embodiments of the present invention, a plug-in box is further included. The bottom of the plug-in box has an inlet hole. Inside the plug-in box are a main power connection bus and a backup power connection bus. The main power connection bus passes through the corresponding inlet hole via a first connector and is connected to the main power supply. The backup power connection bus passes through the corresponding inlet hole via a second connector and is connected to the backup power supply. The plug-in box also includes a power switching switch and a circuit breaker or fuse. The first input terminal of the power switching switch is connected to the main power connection bus, the second input terminal of the power switching switch is connected to the backup power connection bus, and the output terminal of the power switching switch is connected to the input terminal of the circuit breaker or the fuse.

[0012] According to some embodiments of the present invention, the side wall of the plug box is provided with a cable outlet hole.

[0013] According to some embodiments of the present invention, the plug-in box is provided with a viewing window.

[0014] According to some embodiments of the present invention, the plug-in box is a modular structure assembled from multiple aluminum alloy profiles.

[0015] According to some embodiments of the present invention, when the load distribution between the main power supply and the backup power supply is uneven, the power switching switch switches part of the load of the circuit with a larger load to the circuit with a smaller load.

[0016] The high-strength connectorless dual-power busbar trunking according to embodiments of the present invention has at least the following beneficial effects: The tray adopts a non-enclosed structure, which facilitates heat dissipation inside the busbar trunking, preventing accidents caused by excessive temperature or a decrease in current carrying capacity. Any two adjacent conductors are separated by insulating blocks, ensuring sufficient insulation distance and facilitating heat dissipation, thus preventing problems such as phase-to-phase short circuits and combustion. By setting up a main power supply and a backup power supply, the two power supplies can be switched, ensuring power supply stability. Simultaneously, a PE phase conductor is placed inside the tray to ensure the dissipation of single-phase-to-ground fault current.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the high-strength connectorless dual power supply busbar trunking according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the tray according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the tray from another perspective according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the insulating card and the shock-absorbing pad according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the first phase A conductor according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the first phase A conductor according to another embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of a double-layered, high-strength, connectorless dual-power busbar trunking according to an embodiment of the present invention. Figure 8 This is a schematic diagram of the plug-in box according to an embodiment of the present invention; Figure 9 This is a circuit schematic diagram of power switching according to an embodiment of the present invention; Figure 10 This is an exploded view of the plug-in box according to an embodiment of the present invention. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. The step numbers in the following embodiments are set only for ease of explanation, and there is no limitation on the order between the steps. The execution order of each step in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0020] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0021] The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0022] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] Currently, for low-voltage power distribution systems with currents exceeding 100A, power transmission trunk lines primarily utilize cables or busbars. Cables and traditional busbars present the following problems: For cables, most projects currently use enclosed cable trays. There is no ventilation inside the cable trays, so heat cannot be dissipated, resulting in a decrease in current carrying capacity. In many projects, the heat causes the insulation material of the cable to age faster, shortening the service life of the cable and seriously causing short circuits and electrical fires.

[0024] Compared to cables, busbar trunking has a higher current-carrying capacity, up to 6300A, and this capacity is verified through full-load testing. Therefore, most buses with a capacity of 400A or higher use busbar trunking. However, in recent years, there have been many accidents involving busbar trunking in engineering projects. More than 80% of these accidents are related to the busbar trunking connections. The main causes include water ingress, overheating, insufficient current-carrying capacity of the connectors, moisture, condensation, loose bolts, and damage to the insulation layer during installation, all of which can lead to short circuits at the connections.

[0025] Furthermore, with the advent of the era of artificial intelligence, industrial production, hospitals, offices, and homes have increasingly higher requirements for the stability of low-voltage power distribution. Current low-voltage power distribution systems are all powered by a single power source. If an accident occurs, the power outage will last for at least a few hours, or even 2 to 3 days, which will seriously affect production and people's work and life.

[0026] To address this, this invention provides a high-strength connectorless dual-power busbar trunking system. The tray employs a non-enclosed structure, which facilitates heat dissipation within the busbar trunking, preventing overheating and potential accidents or reduced current-carrying capacity. Any two adjacent conductors are separated by insulating blocks, ensuring sufficient insulation distance and facilitating heat dissipation to prevent phase-to-phase short circuits, combustion, and other problems. By setting up a main power supply and a backup power supply, switching between the two power sources can be achieved, ensuring power supply stability. Simultaneously, a PE phase conductor is placed within the tray to ensure the dissipation of single-phase-to-ground fault current.

[0027] The high-strength connectorless dual power busbar trunking of the present invention will now be described in detail with reference to the accompanying drawings.

[0028] This invention proposes a high-strength connectorless dual-power busbar trunking, such as... Figures 1 to 3As shown, the high-strength connectorless dual-power busbar trunking includes: a tray 100, a main power supply 200, a backup power supply 300, an N-phase conductor 400, a PE-phase conductor 500, and an insulating clip 600; wherein, the tray 100 is provided with multiple spaced placement slots 110 for placing each phase conductor; the main power supply 200 includes a first A-phase conductor 210, a first B-phase conductor 220, and a first C-phase conductor 230, and the backup power supply 300 includes a second A-phase conductor 310, a second B-phase conductor 320, and a second C-phase conductor 330; The first A-phase conductor 210, the first B-phase conductor 220, the first C-phase conductor 230, the N-phase conductor 400, the second A-phase conductor 310, the second B-phase conductor 320, the second C-phase conductor 330, and the PE-phase conductor 500 are placed sequentially in their respective placement slots 110. The insulating clip 600 is sleeved above the main power supply 200, the backup power supply 300, the N-phase conductor 400, and the PE-phase conductor 500. The insulating clip 600 is provided with multiple insulating clips 610, and each pair of adjacent conductors is separated by an insulating clip 610.

[0029] like Figure 1 As shown in this application, seven phase conductors are placed in the tray 100: a first A-phase conductor 210, a first B-phase conductor 220, a first C-phase conductor 230, an N-phase conductor 400, a second A-phase conductor 310, a second B-phase conductor 320, and a second C-phase conductor 330. The first A-phase conductor 210, the first B-phase conductor 220, and the first C-phase conductor 230 form a first three-phase power supply, serving as the main power supply 200. The second A-phase conductor 310, the second B-phase conductor 320, and the second C-phase conductor 330 form a second three-phase power supply, serving as a backup power supply 300. The N-phase conductor 400 forms a loop with both three-phase power supplies. When the main power supply 200 experiences a short circuit or other fault, the backup power supply 300 can replace the main power supply 200, preventing power outages. Simultaneously, a PE phase conductor 500 is also placed in the tray 100 to ensure the dissipation of single-phase-to-ground fault current.

[0030] The tray 100 itself has a non-enclosed structure, which is beneficial for heat dissipation of the busbar trunking. In addition, any two adjacent conductors are separated from each other by insulating blocks 610 to ensure sufficient insulation distance, while also facilitating heat dissipation and preventing problems such as phase-to-phase short circuits and combustion.

[0031] Furthermore, such as Figure 1 and Figure 4As shown, the high-strength connectorless dual-power busbar trunking also includes anti-vibration pads 700. The anti-vibration pads 700 are positioned within the tray 100. The main power supply 200, backup power supply 300, N-phase conductor 400, and PE-phase conductor 500 are all placed on the anti-vibration pads 700. The anti-vibration pads 700 are connected to the insulating clips 600 via fasteners 800. By incorporating the anti-vibration pads 700, the vibration resistance of the busbar trunking can be improved, ensuring the electrical connection reliability, mechanical structural integrity, and safety stability of the busbar trunking during long-term operation. The fasteners 800 can employ common structures such as bolts to secure the insulating clips 600 and the anti-vibration pads 700.

[0032] Furthermore, such as Figure 5 As shown, the first phase A conductor 210 includes a multi-layer copper strip conductor 211, a first copper strip wrapping layer 212, a first insulation layer 213, a first metal armor protective layer 214, and a first protective layer 215. The first copper strip wrapping layer 212 wraps the multi-layer copper strip conductor 211, the first insulation layer 213 wraps the first copper strip wrapping layer 212, the first metal armor protective layer 214 wraps the first insulation layer 213, and the first protective layer 215 wraps the first metal armor protective layer 214. Because copper is relatively hard, the copper strip conductor 211 is very thin, approximately 0.2-0.5 mm. By using multiple thin copper sheets, flexibility is increased, making the conductor flexible overall, facilitating the formation of conductors hundreds of meters long, thus eliminating the need for connectors. This structure avoids short-circuit accidents at the connector joints caused by water ingress, overheating, insufficient current carrying capacity, moisture, condensation, and loose bolts in traditional busbar trunking systems. Among them, the first copper strip wrapping layer 212 plays the role of electric field homogenization and preventing partial discharge; the first insulation layer 213 plays the role of insulation; the first metal armor protective layer 214 plays the role of electromagnetic shielding, mechanical protection, heat dissipation and other functions; the first protective layer 215 plays the role of insulation and protecting the internal structure from environmental factors such as moisture, water accumulation, dust, oil, and chemical corrosion.

[0033] It should be noted that the structures of the first B-phase conductor 220, the first C-phase conductor 230, the second A-phase conductor 310, the second B-phase conductor 320, and the second C-phase conductor 330 are the same as the structure of the first A-phase conductor 210.

[0034] Furthermore, such as Figure 6As shown, in some embodiments of this application, the first A-phase conductor 210 includes: a flexible aluminum conductor 216, a second insulating layer 217, a second metal armor protective layer 218, and a second protective layer 219. The second insulating layer 217 encloses the flexible aluminum conductor 216, the second metal armor protective layer 218 encloses the second insulating layer 217, and the second protective layer 219 encloses the second metal armor protective layer 218. It should be noted that compared to copper, aluminum is less hard and more flexible. Therefore, unlike copper, it does not require multiple layers of copper strip conductor 211. Only a single layer of flexible aluminum conductor 216 is needed to form a flexible conductor several hundred meters long, thus eliminating the need for connectors for connection.

[0035] Furthermore, such as Figure 1 , Figure 3 and Figure 7 As shown, in some embodiments of this application, the insulating card 600 has multiple protrusions 620 on its upper surface, and the tray 100 has multiple slots 120 on its bottom surface. The slots 120 and the placement slots 110 are staggered, and the protrusions 620 are adapted to the slots 120. In this application, the high-strength connectorless dual-power busbar trunking can be a single-layer, double-layer, or multi-layer structure, such as... Figure 7 The diagram shows a double-layer structure with two busbars stacked on top of each other. The protrusion 620 of the lower busbar is engaged in the slot 120 of the upper busbar, thus achieving a secure fit between the two.

[0036] Furthermore, such as Figures 8 to 10As shown, in some embodiments of this application, the high-strength connectorless dual power busbar trunking also includes a plug-in box 800. The bottom of the plug-in box 800 is provided with an inlet hole 891. The plug-in box 800 is provided with a main power connection bus 810 and a backup power connection bus 830. The main power connection bus 810 is connected to the main power supply 200 through the corresponding inlet hole via a first connector 820. The backup power connection bus 830 is connected to the backup power supply 300 through the corresponding inlet hole via a second connector 840. The plug-in box 800 is provided with a power switching switch 900 and a circuit breaker or fuse 1000. The first input terminal of the power switching switch 900 is connected to the main power connection bus 810, the second input terminal of the power switching switch 900 is connected to the backup power connection bus 830, and the output terminal of the power switching switch 900 is connected to the input terminal of the circuit breaker or fuse 1000. In this example, the three-phase conductors of the main power supply 200 are connected to the main power supply bus 810 via the first connector 820, thus creating a circuit. The main power supply bus 810 is then connected sequentially to the power switching switch 800 and the circuit breaker / fuse 1000. Similarly, the three-phase conductors of the backup power supply 300 are connected to the backup power supply bus 830 via the second connector 840, thus creating a circuit. The backup power supply bus 830 is then connected sequentially to the power switching switch 800 and the circuit breaker / fuse 1000. Thus, the operating states of the main power supply 200 and the backup power supply 300 can be automatically or manually switched via the power switching switch 800. When the main power supply 200 fails, the backup main power supply 200 can be shut down and the backup power supply 300 activated via the power switching switch 800; conversely, when the backup power supply 300 fails, the backup power supply 300 can be shut down and the main power supply 200 activated via the power switching switch 800, improving the reliability of the power supply. In addition, the entire device can be shut down by the circuit breaker / fuse 1000 in the event of a malfunction.

[0037] The plug-in box 800 can be equipped with a fuse 1000, along with current transformers and multi-functional power data acquisition instruments to achieve real-time monitoring of the busbar trunking; or, the plug-in box 800 can be equipped with a circuit breaker, along with current transformers and multi-functional power data acquisition instruments; or, the plug-in box 800 can be equipped with a fuse, along with multiple branch switches.

[0038] like Figure 8 As shown, in some embodiments of this application, the side wall of the plug-in box 800 is provided with a cable outlet hole 860 to facilitate the routing of the wiring inside the plug-in box 800 to the outside of the box. A sealing ring 880 is provided at the cable outlet hole 860 to improve the sealing performance of the plug-in box 800.

[0039] like Figure 8As shown, in some embodiments of this application, the plug box 800 is provided with a viewing window 850, which can be provided on the cover plate 890 or the side wall of the plug box 800, so as to facilitate viewing the inside of the plug box 800 from the outside.

[0040] like Figure 10 As shown, in some embodiments of this application, the plug-in box 800 is assembled from multiple aluminum alloy profiles 870 or color-coated steel through stamping. Traditional plug-in boxes 800 are usually formed by welding and electrostatic spraying of steel plates, which pollutes the air and water. However, the plug-in box 800 of this application is a modular structure, which is directly assembled after pre-treatment of the surface, and does not pollute the environment, thus meeting the requirements of environmental protection.

[0041] Furthermore, in some embodiments of this application, when the main power supply 200 and the backup power supply 300 operate simultaneously, and the load distribution between the main power supply 200 and the backup power supply 300 is uneven, a power switching switch 900 switches part of the load of the circuit with a larger load to the circuit with a smaller load. By rationally distributing the load, the service life is improved.

[0042] The high-strength connectorless dual-power busbar trunking according to an embodiment of the present invention has the following characteristics: 1. Multiple copper or aluminum sheets of 0.2-0.5 mm are used to form a conductor, which facilitates the production of flexible, jointless busbars. The total length can be 2000 meters without joints. 2. The structural characteristics of the tray 100 give it high strength. The flexible busbar is installed in the high-strength tray 100 of the U-shaped channel and the phases are separated by insulating clips 600, thereby ensuring ventilation and heat dissipation.

[0043] 3. The high-strength tray 100 has seven flexible busbars laid inside, forming two three-phase power supplies, and one neutral N line to carry the loop current.

[0044] 4. The PE line is located on one side inside the tray 100 to ensure the evacuation of single-phase-to-ground fault current.

[0045] 5. A power switching switch 800 is installed on the dual circuit, which can be set to automatic or manual switching. When one power supply fails, it will automatically or manually switch to the other power supply, thereby improving the reliability of power supply.

[0046] 6. When the load distribution between the two circuits is uneven, and one circuit has excessive load, use a power transfer switch to switch part of the load to the busbar of the other circuit. Proper load distribution extends the service life of the circuit.

[0047] 7. The plug-in box 800 is formed by stamping and assembling pre-treated aluminum alloy profiles and color-coated steel, which will not affect the environment and is an environmentally friendly product.

[0048] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A high-strength connectorless dual-power busbar trunking, characterized in that, include: The tray is provided with multiple spaced-apart placement slots; The main power supply includes a first phase A conductor, a first phase B conductor, and a first phase C conductor; Backup power supply, including second phase A conductor, second phase B conductor and second phase C conductor; N-phase conductor; The PE phase conductor, wherein the first A phase conductor, the first B phase conductor, the first C phase conductor, the N phase conductor, the second A phase conductor, the second B phase conductor, the second C phase conductor, and the PE phase conductor are placed sequentially in the corresponding placement slots; An insulating clip is fitted over the main power supply, the backup power supply, the N-phase conductor, and the PE-phase conductor. The insulating clip has multiple insulating blocks, and each pair of adjacent conductors is separated by the insulating blocks.

2. The high-strength connectorless dual power supply busbar trunking according to claim 1, characterized in that, It also includes shock-absorbing rubber pads, which are placed inside the tray. The main power supply, the backup power supply, the N-phase conductor, and the PE-phase conductor are all placed on the shock-absorbing rubber pads. The shock-absorbing rubber pads are connected to the insulating clips by fasteners.

3. The high-strength connectorless dual-power busbar trunking according to claim 1, characterized in that, The first phase A conductor includes: Multilayer copper strip conductors stacked together; The first copper strip wrapping layer wraps the multi-layer copper strip conductor; The first insulating layer wraps around the first copper strip wrapping layer; A first metal armor protective layer surrounds the first insulating layer; The first protective layer encloses the first metal armor protective layer.

4. The high-strength connectorless dual-power busbar trunking according to claim 1, characterized in that, The first phase A conductor includes: Flexible aluminum conductor; A second insulating layer encapsulates the flexible aluminum conductor; A second metal armor protective layer surrounds the second insulating layer; The second protective layer encases the second metal armor protective layer.

5. The high-strength connectorless dual-power busbar trunking according to claim 1, characterized in that, The insulating card has multiple protrusions on its upper part, and the tray has multiple card slots on its bottom. The card slots are staggered with the placement slots, and the protrusions are adapted to the card slots.

6. The high-strength connectorless dual-power busbar trunking according to claim 1, characterized in that, It also includes a plug-in box, the bottom of which is provided with a cable inlet hole. The plug-in box contains a main power connection bus and a backup power connection bus. The main power connection bus is connected to the main power supply through a first connector passing through the corresponding cable inlet hole. The backup power connection bus is connected to the backup power supply through a second connector passing through the corresponding cable inlet hole. The plug-in box contains a power switching switch and a circuit breaker or fuse. The first input terminal of the power switching switch is connected to the main power connection bus, the second input terminal of the power switching switch is connected to the backup power connection bus, and the output terminal of the power switching switch is connected to the input terminal of the circuit breaker or the fuse.

7. The high-strength connectorless dual power supply busbar trunking according to claim 6, characterized in that, The side wall of the plug box is provided with a cable outlet hole.

8. The high-strength connectorless dual-power busbar trunking according to claim 6, characterized in that, The plug-in box is equipped with a viewing window.

9. The high-strength connectorless dual-power busbar trunking according to claim 6, characterized in that, The plug-in box has a modular structure, which is assembled from multiple aluminum alloy profiles.

10. The high-strength connectorless dual power supply busbar trunking according to claim 6, characterized in that, When the load distribution between the main power supply and the backup power supply is uneven, the power switching switch can be used to switch part of the load of the circuit with a larger load to the circuit with a smaller load.

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