Busbar with structure capable of accessing higher incoming current and busbar binding post

Abstract

The utility model discloses a busbar with a structure capable of accessing higher incoming current and a busbar binding post, the busbar comprises an insulating shell and more than one busbar, the more than one busbar is embedded in the insulating shell, the busbar mainly comprises a transverse trunk, a vertical tooth trunk and a vertical tooth tip, the vertical tooth trunk is fixedly connected to the transverse trunk, the vertical tooth tip is fixedly connected to the vertical tooth trunk, and the vertical tooth tip is fixedly connected to the vertical tooth trunk. Each transverse trunk is connected with more than one vertical tooth trunk, the vertical tooth tips are fixedly connected to the ends of the vertical tooth trunks, the busbar binding post is used in cooperation with the busbar, the busbar binding post comprises a binding post shell, a protective cover, a screw and a metal fastener, the metal fastener is arranged in the binding post shell, and the protective cover is arranged on the binding post shell. The number and the relative distance of the metal fasteners are matched with those of vertical tooth tips on the busbar, the screws are fixedly mounted on the metal fasteners, and the protective cover is mounted at the position, corresponding to the screws, of the binding post shell.

Description

Technical Field

[0001] The utility model discloses a busbar and a terminal, in particular a busbar and a busbar terminal with a structure capable of receiving a higher incoming current. The busbar and the busbar terminal can receive a higher incoming current and are compatible with instruments or circuit breakers with a standard 18mm wiring hole spacing, thereby enabling more instruments or switches to be connected to a busbar, and the incoming cables and instruments can be easily connected by loosening or tightening the terminal screws. Background Art

[0002] A busbar is a connection accessory used in multi-line power distribution equipment such as low-voltage power cabinets, distribution boxes, and lighting boxes to connect the main incoming line switch with the equipment on each feeder branch. These devices include instruments or air switches, and are safe, reliable, and time-saving to use.

[0003] According to industry practice, rail-mounted meters and circuit breakers utilize a top-inlet and bottom-outlet configuration, with the standard width of each P-type switch being 18mm. Consequently, the spacing between the upper and lower wiring holes of similar and derived electrical equipment is also 18mm. Busbars are compatible with the standard 18mm wiring hole spacing, and the busbar pitch also uses 18mm.

[0004] The busbar structure in current technology mainly includes:

[0005] Part 1 – Horizontal Trunk: In the current industry, the horizontal trunk and vertical tooth trunk use the same width of 7mm;

[0006] Part 2 – Vertical Tooth Stem: In today’s busbar industry, the vertical tooth stem and vertical tooth tip have the same function;

[0007] Part 3 – Vertical tooth tip: In the current industry, the incoming line is directly connected to the wiring hole of the equipment, that is, the incoming line and the vertical tooth tip of the bus share the equipment wiring hole.

[0008] Therefore, in the prior art, the contact width of the incoming line and the vertical tooth tip of the busbar and the thickness of the copper bar determine the maximum total current that can be connected to the busbar, which is the bottleneck. Due to the limitation of the standard interval of 18mm per P, after removing the metal fastener and the insulating isolation shell, the size of the wiring hole that can be used for wiring is 8mm in maximum width and 9mm in maximum height. According to the half-and-half distribution of the incoming line and the busbar, the maximum available thickness is 4.5mm, while in the industry, the vertical tooth tip part of the common busbar is 3mm (thick) x 5.5mm (wide), therefore, the total current that can be connected to the busbar is about 63A, so a busbar can only connect up to two 63A three-phase meters. In the prior art, some manufacturers widen the width of the vertical tooth tip to the maximum limit of 8mm of the device wiring hole, and increase the overall thickness of the copper bar to increase the thickness of the tooth tip to increase the total current connected to the device. Limited by the maximum width of 8mm of the wiring hole, when the device wiring hole is full, 8mm (maximum width) x 4mm (maximum thickness), the maximum total current that can be connected is 96A, so a busbar can connect up to three 63A three-phase meters. SUMMARY

[0009] In view of the small current that can be connected to the busbar in the prior art mentioned above, the utility model provides a busbar and a busbar terminal post with a higher incoming line current structure, which improves the structure of the busbar and adds a busbar terminal post to increase the width of the incoming line and the thickness of the copper bar, thereby greatly increasing the total current value that can be connected to the busbar. In particular, a single-phase 2P busbar can connect three-phase incoming lines, and three-phase balance can be achieved more simply, thereby increasing the stability of the connection and the service life.

[0010] The utility model solves its technical scheme adopting the technical scheme: a busbar with a higher incoming line current structure, the busbar includes an insulating shell and one or more busbars, one or more busbars are embedded in the insulating shell, the busbar mainly has a horizontal main stem, a vertical tooth stem and a vertical tooth tip, the vertical tooth stem is fixedly connected to the horizontal main stem, one or more vertical tooth stems are connected to each horizontal main stem, and the vertical tooth tip is fixedly connected to the end of the vertical tooth stem.

[0011] A busbar terminal post with a higher incoming line current structure, the busbar terminal post is used with the busbar as described above, the busbar terminal post includes a terminal post shell, a protective cover, a screw and a metal fastener, the metal fastener is arranged in the terminal post shell, the number and relative distance of the metal fasteners are consistent with the vertical tooth tips on the busbar, the screw is fixedly installed on the metal fastener, and the protective cover is installed at the position corresponding to the screw of the terminal post shell.

[0012] The total current a busbar can handle depends on two factors: the width of the contact between the incoming wires and the busbar, and the thickness of the conductors. This new design improves the busbar structure and adds a busbar terminal to the vertical teeth that connect the incoming wires and busbar, shifting the contact surface between the incoming wires and busbar from the vertical tooth tips to the vertical teeth. As a result, the maximum contact width between the new three-phase 4P busbar and the new single-phase 2P busbar and the incoming wires is no longer limited by the width of the wiring hole. The maximum width of the contact surface between the incoming wires and the busbar can reach the maximum width of the vertical teeth, 12mm. This increases the maximum contact surface width between the incoming wires and the busbar from the current 7mm to 12mm. Furthermore, since the equipment wiring hole does not require an incoming wire, the entire 9mm height of the equipment wiring hole can be used for the busbar. The maximum thickness of the terminal hole is 17mm. If the incoming wires and the busbar each occupy half, the maximum thickness of the incoming wires and the busbar can each be increased to 8.5mm. Copper busbar thicknesses can be customized to meet customer needs. Thicker busbars increase the total current that can be handled. Copper busbar thicknesses range from 4.00 to 8.50mm. The maximum acceptable thickness of 8.50mm is 88% thicker than the 4.5mm maximum acceptable thickness offered by other manufacturers. Because both the width of the busbars contacting the incoming cables and the acceptable thickness have been increased, the total current that can be handled by the busbars has been significantly increased.

[0013] The technical solution adopted by the utility model to solve its technical problems further includes:

[0014] The three parts of the horizontal trunk, the vertical tooth trunk and the vertical tooth tip are all made by stamping and bending from a copper plate of the same thickness, and the copper bars of the three parts have the same thickness.

[0015] The width of the transverse trunk is 12.00±0.20mm and the thickness is 4.00~8.50mm.

[0016] The width of the vertical tooth stem is 12.00±0.20mm and the thickness is 4.00~8.50mm.

[0017] The width of the vertical tooth tip is 8.00±0.20mm and the thickness is 4.00~8.50mm.

[0018] Four busbars are embedded in parallel in the insulating housing, wherein one busbar is used to connect the A-phase line, one busbar is used to connect the B-phase line, one busbar is used to connect the C-phase line, and one busbar is used to connect the N-phase ground line; the A-phase line, the B-phase line, the C-phase line and the N-phase ground line form a three-phase 4P structure, and the center distance between adjacent vertical teeth on the busbar is 72.00±0.20mm.

[0019] Four busbars are embedded in parallel in the insulating housing, wherein the four busbars represent the A-phase line, the B-phase line, the C-phase line and the N-phase grounding line, respectively. A single-phase 2P structure is formed between the A-phase line, the B-phase line and the C-phase line and the N-phase grounding line, respectively. The center distance between adjacent vertical teeth on the busbars of the A-phase line, the B-phase line and the C-phase line is 108.00±0.20mm, and the center distance between adjacent vertical teeth on the busbar of the N-phase grounding line is 36.00±0.20mm.

[0020] The screws are M8 hexagon socket screws.

[0021] The beneficial effects of the present invention are as follows: the present invention provides a busbar and busbar terminals that can accommodate higher incoming currents and are compatible with instruments or circuit breakers with standard 18mm wiring hole spacing, thereby enabling the connection of more instruments or switches to a single busbar. Incoming cables and instruments can also be easily connected by loosening or tightening the terminal screws. Wider busbar copper teeth and larger screws increase the contact surface, thereby reducing problems such as poor contact and copper busbar heating, and can effectively improve the safety, stability, and service life of the busbar. The new structure can connect three-phase incoming lines to the same single-phase 2P busbar, making it easier to design and install when achieving three-phase balance.

[0022] The present invention will be further described below with reference to the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the main structure of a busbar embodiment 1 of the present invention.

[0024] Figure 2 This is a structural diagram of a first embodiment of the busbar insulating housing of the present utility model.

[0025] Figure 3 This is a schematic diagram of the structure of the busbar embodiment 1 of the present invention in an exploded state.

[0026] Figure 4 This is a schematic diagram of the main structure of the second embodiment of the busbar of the present invention.

[0027] Figure 5 This is a structural diagram of a second embodiment of the busbar insulating housing of the present utility model.

[0028] Figure 6 This is a schematic diagram of the structure of the busbar embodiment 2 of the present invention in an exploded state.

[0029] Figure 7 This is a schematic diagram of the three-dimensional structure of the busbar embodiment 1 of the present invention in use.

[0030] Figure 8This is a front view structural diagram of the first embodiment of the busbar of the present invention in use.

[0031] Figure 9 This is a schematic diagram of the exploded three-dimensional structure of the busbar embodiment 1 of the present invention in use state.

[0032] Figure 10 This is a schematic diagram of the exploded front view of the busbar embodiment 1 of the present invention in use state.

[0033] Figure 11 This is a schematic diagram of the three-dimensional structure of the busbar embodiment 2 of the present invention in use.

[0034] Figure 12 This is a front view structural diagram of the second embodiment of the busbar of the present invention in use.

[0035] Figure 13 This is a schematic diagram of the exploded three-dimensional structure of the busbar embodiment 2 of the present invention in use state.

[0036] Figure 14 This is a schematic diagram of the exploded front view of the busbar embodiment 2 of the present invention in use state.

[0037] In the figure, 11-insulating shell, 12-horizontal trunk, 13-vertical tooth trunk, 14-vertical tooth tip, 21-terminal shell, 22-protective cover, 23-screw, 24-metal fastener, 3-wire, 4-equipment. DETAILED DESCRIPTION

[0038] This embodiment is a preferred implementation of the present utility model. Other embodiments whose principles and basic structures are the same or similar to those of this embodiment are within the protection scope of the present utility model.

[0039] Please refer to the attached Figure 1 To the attached Figure 14 The utility model mainly protects a busbar with a structure that can be connected to a higher incoming current, including an insulating shell 11 and one or more busbars. The one or more busbars are embedded in the insulating shell 11. The busbar mainly consists of a horizontal trunk 12, a vertical tooth trunk 13 and a vertical tooth tip 14. The vertical tooth trunk 13 is fixedly connected to the horizontal trunk 12. Each horizontal trunk 12 is connected to one or more vertical tooth trunks 13. The vertical tooth tip 14 is fixedly connected to the end of the vertical tooth trunk 13.

[0040] In this embodiment, the busbars are made of copper bars by stamping and bending. Generally, each busbar is about 1 meter long and can be cut according to the number of devices to be connected.

[0041] In this embodiment, the transverse trunk 12, the vertical tooth trunk 13 and the vertical tooth tip 14 are all made by stamping and bending from a copper plate of the same thickness, and the copper bars of the three parts are of the same thickness.

[0042] In this embodiment, the transverse trunk 12 is a copper busbar shared by all connected instrument switches. The width and thickness of the transverse trunk 12 determine the total current that can be shared with the connected devices. Increasing the width and thickness can increase the total current carrying capacity. In this embodiment, the width of the transverse trunk 12 is preferably 12.00±0.20mm, and the thickness of the transverse trunk 12 can be selected to be 4.00±0.20mm. In actual implementation, the thickness can be determined according to actual needs, with a typical thickness ranging from 4.00 to 8.50mm.

[0043] In this embodiment, the vertical tooth stem 13 is a key component that vertically connects the transverse trunk 12 and the vertical tooth tip 13. When the copper bar thickness is the same, the width of the vertical tooth stem 13 is the same as the width of the transverse trunk 12 to avoid a new current bottleneck. In this embodiment, the width of the vertical tooth stem 13 is preferably 12.00±0.20mm, and the thickness of the vertical tooth stem 13 can be selected to be 4.00±0.20mm. In actual implementation, the thickness can be determined according to actual needs, with a typical thickness ranging from 4.00 to 8.50mm.

[0044] In this embodiment, the vertical tooth tip 14 is the portion that connects to the device wiring hole. In this embodiment, the width of the vertical tooth tip 14 is preferably 8.00±0.20mm, and the thickness of the vertical tooth tip 14 can be selected to be 4.00±0.20mm. In specific implementation, the thickness can be determined according to actual needs, and the typical thickness is 4.00 to 8.50mm.

[0045] The busbar in the present invention can be used in three-phase electricity as well as single-phase electricity, and two specific implementation methods will be described below.

[0046] Example 1: Please see the attached Figure 1 To the attached Figure 3 In this embodiment, the busbar is applied to a three-phase power structure. Four busbars are required in the three-phase power structure. In this utility model, it is defined as three-phase 4P, that is, the utility model is used to connect three-phase 4P equipment. Four busbars are embedded in the insulating housing 11 in parallel, among which one busbar is used to connect the A-phase line, one busbar is used to connect the B-phase line, one busbar is used to connect the C-phase line, and one busbar is used to connect the N-phase ground line. The adjacent vertical teeth on the busbar are connected. The center distance between the stem 13 or the adjacent vertical tooth tips 14 is preferably 72.00±0.20mm. In this way, the center distance between the vertical tooth stem 13 or vertical tooth tip 14 of the A-phase bus and the vertical tooth stem 13 or vertical tooth tip 14 of the adjacent B-phase bus is preferably 18.00±0.20mm. The settings of the B-phase bus and the C-phase bus, the C-phase bus and the N-phase bus, and the N-phase bus and the adjacent A-phase bus are the same as above.

[0047] Example 2: Please see the attached Figure 4 To the attached Figure 6 This embodiment utilizes a busbar structure with a single-phase power supply. Single-phase power requires two busbars, which are defined in this utility model as a single-phase 2P busbar. This designation indicates that this utility model is used to connect single-phase 2P equipment. In this embodiment, the A, B, and C phases are connected to the N-phase ground wire to form a single-phase 2P device connection. The single-phase 2P busbar shares the same three-part copper busbar design as the three-phase 4P busbar, but adds a 2P busbar meter terminal structure, increasing the total current capacity connected to the busbar. Furthermore, the single-phase 2P busbar improves the number of phases that can be connected to the incoming power supply on the same busbar.

[0048] In this embodiment, the core of the single-phase 2P busbar is made of four copper bars stamped and bent, representing the A, B, and C phases of the three-phase four-wire system, and the N phase grounding wire. A single-phase 2P structure is formed between the A, B, and C phases and the N phase grounding wire. The four copper bars are each embedded in an insulating housing 11, which isolates the copper bars from each phase. In this embodiment, for ease of transportation and use, each busbar is generally approximately 1 meter long. The actual length of the finished product can be adjusted as needed during production; when used by the user, it can be reduced based on the number of connected devices. In this embodiment, the center-to-center distance between adjacent vertical teeth 13, or adjacent vertical tooth tips 14, on the A, B, and C phase busbars is preferably 108.00±0.20 mm. The center-to-center distance between adjacent vertical teeth 13, or adjacent vertical tooth tips 14, on the N phase grounding busbar is preferably 36.00±0.20 mm.

[0049] Conventional designs in the industry connect only one phase of the incoming power to a busbar. To achieve three-phase balance, the equipment in the distribution box needs to be divided into three buses, or multiples of three, with the same load. However, the present invention connects the three-phase incoming power to a single busbar, allowing the equipment in the distribution box to be distributed to any number of buses, while also achieving three-phase balance in the distribution box. This simplifies the design and installation of the distribution box and extends its service life.

[0050] The present invention also protects a bus terminal with a structure that can be connected to a higher incoming current. The bus terminal is used in conjunction with the above-mentioned bus. The bus terminal mainly includes a terminal housing 21, a protective cover 22, screws 23 and metal fasteners 24. The metal fasteners 24 are arranged in the terminal housing 21. The number and relative distance of the metal fasteners 24 match the vertical tooth tips 14 on the bus. The screws 23 are fixedly installed on the metal fasteners 24. The wires 3 can be fixed together with the bus by the screws 23. A protective cover 22 is installed at the position of the terminal housing 21 corresponding to the screws 23.

[0051] In this embodiment, the screw 23 is an M8 hexagon socket screw. The M8 hexagon socket screw is larger than the screws in the equipment wiring hole and exerts greater pressure, which can make the wiring more secure and increase the contact surface between the incoming line and the busbar, thereby greatly improving the safety and stability of the wiring.

[0052] The busbar and busbar terminal structure of the present invention can be used not only for three-phase 4P busbars, but also for busbars of other specifications such as 2P busbars, or can also be used in busbars of other specifications.

[0053] The utility model can be widely applied to guide rail type electric meters, air switches, or similar and derived electrical equipment 4 and the like.

[0054] This utility model provides a busbar and busbar terminals that can handle higher incoming currents and are compatible with instruments or circuit breakers with standard 18mm wiring hole spacing. This allows for the connection of more instruments or switches on a single busbar, while also allowing for easy connection of incoming cables and instruments via loose or tightening terminal screws. Wider busbar copper teeth and larger screws increase the contact surface, reducing issues such as poor contact and copper busbar heating, effectively improving the busbar's safety, stability, and service life. This new structure enables the connection of three-phase incoming lines to a single single-phase 2P busbar, simplifying design and installation while achieving three-phase balancing.

Claims

1. A busbar capable of accepting a higher incoming current, characterized by: The busbar comprises an insulating shell (11) and one or more busbars, wherein the one or more busbars are embedded in the insulating shell (11), and the busbar mainly comprises a transverse trunk (12), a vertical tooth trunk (13) and a vertical tooth tip (14), wherein the vertical tooth trunk (13) is fixedly connected to the transverse trunk (12), and each transverse trunk (12) is connected to one or more vertical tooth trunks (13), and the vertical tooth tip (14) is fixedly connected to the end of the vertical tooth trunk (13).

2. The busbar capable of accepting a higher incoming current according to claim 1, wherein: The three parts of the horizontal trunk (12), the vertical tooth trunk (13) and the vertical tooth tip (14) are all made by stamping and bending from a copper plate of the same thickness, and the copper bars of the three parts have the same thickness.

3. The busbar capable of accepting a higher incoming current according to claim 1, wherein: The width of the transverse trunk (12) is 12.00±0.20 mm, and the thickness is 4.00~8.50 mm.

4. The busbar capable of accepting a higher incoming current according to claim 1, wherein: The width of the vertical tooth stem (13) is 12.00±0.20 mm and the thickness is 4.00~8.50 mm.

5. The busbar capable of accepting a higher incoming current according to claim 1, wherein: The vertical tooth tip (14) has a width of 8.00±0.20 mm and a thickness of 4.00 to 8.50 mm.

6. The busbar capable of accepting a higher incoming current according to claim 1, wherein: Four busbars are embedded in parallel in the insulating housing (11), wherein one busbar is used to connect the A-phase line, one busbar is used to connect the B-phase line, one busbar is used to connect the C-phase line, and one busbar is used to connect the N-phase ground line. The A-phase line, the B-phase line, the C-phase line and the N-phase ground line form a three-phase 4P structure, and the center distance between adjacent vertical teeth (13) on the busbar is 72.00±0.20mm.

7. The busbar capable of accepting a higher incoming current according to claim 1, wherein: Four busbars are embedded in parallel in the insulating housing (11), wherein the four busbars represent the A-phase line, the B-phase line, the C-phase line and the N-phase grounding line respectively, and a single-phase 2P structure is formed between the A-phase line, the B-phase line and the C-phase line and the N-phase grounding line respectively. The center distance between adjacent vertical teeth (13) on the busbars of the A-phase line, the B-phase line and the C-phase line is 108.00±0.20mm, and the center distance between adjacent vertical teeth (13) on the busbar of the N-phase grounding line is 36.00±0.20mm.

8. A busbar terminal having a structure capable of accepting a higher incoming current, the busbar terminal being used in conjunction with the busbar according to any one of claims 1 to 7, wherein: The bus terminal comprises a terminal housing (21), a protective cover (22), a screw (23) and a metal fastener (24). The metal fastener (24) is arranged in the terminal housing (21). The number and relative distance of the metal fasteners (24) match the vertical tooth tips (14) on the bus. The screw (23) is fixedly mounted on the metal fastener (24). The terminal housing (21) is provided with a protective cover (22) at a position corresponding to the screw (23).

9. The busbar terminal with a structure capable of accepting higher incoming current according to claim 8, characterized in that: The screw (23) is an M8 hexagon socket screw.

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