Busbar interconnection structure

Abstract

The utility model discloses a busbar interconnection structure, which comprises at least two groups of low-voltage power supply incoming lines, a plurality of incoming line frame circuit breakers and a plurality of neutral line mutual inductors, and is characterized in that each group of low-voltage power supply incoming lines is provided with at least two incoming line frame circuit breakers, and a neutral line loop of each incoming line frame circuit breaker is connected with a corresponding neutral line mutual inductor; wherein the plurality of inlet wire frame circuit breakers corresponding to the same group of low-voltage power supply inlet wires are in short circuit with the input side of the neutral wire mutual inductor, the plurality of inlet wire frame circuit breakers corresponding to different groups of low-voltage power supply inlet wires are in short circuit with the output side of the neutral wire mutual inductor, and the neutral wires of the plurality of groups of low-voltage power supply inlet wires are interconnected through a busbar.

Description

Technical Field

[0001] This application relates to the field of low-voltage switchgear technology, and more specifically to a busbar interconnection structure. Background Technology

[0002] Currently, in low-voltage power distribution systems, dual-power supply schemes are widely used in industrial, commercial, and residential scenarios due to their ability to significantly improve power supply reliability. The mainstream dual-power distribution schemes mainly include two types: single-busbar segmented type and double-busbar independent type.

[0003] However, both solutions have significant drawbacks in neutral current monitoring and control logic. The existing single-busbar segmented solution connects two power supplies to a single busbar via isolating switches, with a segmented circuit breaker in the middle of the busbar and mechanical or electrical interlocks to prevent parallel connection of the two power supplies. The core advantage of this solution is its simple structure and low cost, but its core drawback is the inability to monitor the neutral current in real time. The dual-busbar independent solution connects the main and backup power supplies to independent busbars, achieving redundancy through bus tie circuit breakers and relying on a PLC control module for automatic power switching. However, the dual-busbar independent solution suffers from complex control logic and high debugging costs. The PLC control module needs to integrate complex programs such as power priority judgment, fault detection, and interlocking logic. During system operation, the PLC module needs to collect multiple current and voltage signals in real time and perform logical operations, placing extremely high demands on hardware performance and software stability. Subsequent maintenance requires dedicated programming equipment, resulting in high operation and maintenance costs. Utility Model Content

[0004] The purpose of this application is to provide a busbar interconnection structure to solve the problems of monitoring deficiencies in single busbar configurations and control complexity in dual busbar configurations in low-voltage switchgear.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a busbar interconnection structure is provided, comprising: at least two sets of low-voltage power supply incoming lines, multiple incoming line frame circuit breakers, and multiple neutral line transformers. Each set of low-voltage power supply incoming lines is configured with at least two of the incoming line frame circuit breakers, and the neutral line circuit of each incoming line frame circuit breaker is connected to the corresponding neutral line transformer. Specifically, multiple incoming line frame circuit breakers corresponding to the same set of low-voltage power supply incoming lines are short-circuited to the input side of the neutral line transformer, and multiple incoming line frame circuit breakers corresponding to different sets of low-voltage power supply incoming lines are short-circuited to the output side of the neutral line transformer. Furthermore, the neutral lines of multiple sets of low-voltage power supply incoming lines are interconnected via busbars.

[0006] As a preferred embodiment, the system further includes: a support bracket, wherein the low-voltage power supply line is disposed within the support bracket, the incoming line frame circuit breaker is fixedly connected to the support bracket, and the neutral line transformer is fixedly connected to the support bracket.

[0007] Alternatively, the incoming line frame circuit breaker is fixed by the bracket to be raised relative to the ground.

[0008] More preferably, the low-voltage power supply line includes a first group of low-voltage power supply lines and a second group of low-voltage power supply lines, with the first group of low-voltage power supply lines and the second group of low-voltage power supply lines located on opposite sides of the bracket.

[0009] Further preferably, the incoming line frame circuit breaker includes a first set of frame circuit breakers and a second set of frame circuit breakers. Both the first set of frame circuit breakers and the second set of frame circuit breakers are connected to the bracket. The first set of frame circuit breakers is used to electrically connect to the first set of low-voltage power supply incoming lines, and the second set of frame circuit breakers is used to electrically connect to the second set of low-voltage power supply incoming lines.

[0010] Further preferably, the first group of frame circuit breakers and the second group of frame circuit breakers are arranged on the same axis.

[0011] Further preferably, the first group of frame circuit breakers includes a first frame circuit breaker and a second frame circuit breaker, and the second group of frame circuit breakers includes a third frame circuit breaker and a fourth frame circuit breaker; wherein, the first frame circuit breaker and the third frame circuit breaker are interconnected via a busbar, and the second frame circuit breaker and the fourth frame circuit breaker are interconnected via a busbar.

[0012] Preferably, the neutral line transformer includes: a first neutral line transformer, a second neutral line transformer, a third neutral line transformer, and a fourth neutral line transformer, wherein the first neutral line transformer and the second neutral line transformer correspond to the first group of frame circuit breakers, and the third neutral line transformer and the fourth neutral line transformer correspond to the second group of frame circuit breakers.

[0013] Preferably, the first neutral line transformer, the second neutral line transformer, the third neutral line transformer, and the fourth neutral line transformer are arranged on the same axis.

[0014] Compared with the prior art, the beneficial effects of this application are as follows:

[0015] By connecting an external neutral current transformer to the neutral circuit of each incoming frame circuit breaker and using the connection method of "short-circuiting the input side of the same power supply group and short-circuiting the output side of different power supply groups", the neutral current can be directly monitored in real time, avoiding the blind spot of single busbar segmented monitoring; at the same time, by replacing the PLC control module with a hardware interconnection structure, the logic is simplified and the programming and debugging problems of dual busbar independent type are solved. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the busbar interconnection structure;

[0017] Figure 2 A schematic diagram of the busbar interconnection structure without the support frame;

[0018] Figure 3 This is a schematic diagram of the busbar interconnection structure from the front view.

[0019] Figure 4 This is a schematic diagram of the busbar interconnection structure from a side view.

[0020] In the diagram: 1. Busbar interconnection structure; 10. Low-voltage power supply incoming line; 11. First group of low-voltage power supply incoming lines; 12. Second group of low-voltage power supply incoming lines; 20. Incoming line frame circuit breaker; 21. First group of frame circuit breakers; 211. First frame circuit breaker; 212. Second frame circuit breaker; 22. Second group of frame circuit breakers; 221. Third frame circuit breaker; 222. Fourth frame circuit breaker; 30. Neutral line transformer; 31. First neutral line transformer; 32. Second neutral line transformer; 33. Third neutral line transformer; 34. Fourth neutral line transformer; 40. Support bracket. Detailed Implementation

[0021] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0022] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. They should not be construed as limiting the specific protection scope of this application.

[0023] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0024] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0025] In a preferred embodiment, see Figures 1 to 4 This application provides a busbar interconnection structure 1, including: at least two sets of low-voltage power supply incoming lines 10, multiple incoming line frame circuit breakers 20, and multiple neutral line transformers 30. Each set of low-voltage power supply incoming lines 10 is equipped with at least two incoming line frame circuit breakers 20, and the neutral line circuit of each incoming line frame circuit breaker 20 is connected to the corresponding neutral line transformer 30. Among them, the multiple incoming line frame circuit breakers 20 corresponding to the same set of low-voltage power supply incoming lines 10 are short-circuited to the input side of the neutral line transformer 30, and the multiple incoming line frame circuit breakers 20 corresponding to different sets of low-voltage power supply incoming lines 10 are short-circuited to the output side of the neutral line transformer 30. The neutral lines of the multiple sets of low-voltage power supply incoming lines 10 are interconnected through busbars.

[0026] In response to the shortcomings of the "single busbar segmented scheme" in related technologies, which cannot monitor the neutral current in real time, and the "dual busbar independent scheme", which has complex PLC control logic, this application proposes a solution that achieves real-time monitoring of the neutral current without the need for PLC programming by connecting an external neutral current transformer to the neutral circuit of the frame circuit breaker of each power supply incoming line, short-circuiting the input side of the transformer of the same power supply group and short-circuiting the output side of different power supply groups.

[0027] Specifically, by connecting an external neutral line transformer 30 to the neutral line circuit of each incoming line frame circuit breaker 20, and using the connection method of "short-circuiting the input side of the same power supply group and short-circuiting the output side of different power supply groups", the neutral line current can be directly monitored in real time, avoiding the monitoring blind spot of the single busbar segmented type; at the same time, by replacing the PLC control module with a hardware interconnection structure, the logic is simplified and the programming and debugging problem of the dual busbar independent type is solved.

[0028] As a preferred embodiment, it also includes: a bracket 40, a low-voltage power supply line 10 disposed inside the bracket 40, an incoming line frame circuit breaker 20 fixedly connected to the bracket 40, and a neutral line transformer 30 fixedly connected to the bracket 40.

[0029] As another preferred option, the incoming line frame circuit breaker 20 is fixed to the bracket 40 and raised relative to the ground. After being raised by the bracket 40, sufficient space can be reserved below the circuit breaker for cable routing, avoiding problems such as damage from trampling and insulation aging caused by cables piling up on the ground. Among them, the bracket 40, as the core load-bearing carrier, provides support for the low-voltage power incoming line 10, the incoming line frame circuit breaker 20, and the neutral line transformer 30. By pre-setting the installation points on the bracket 40, the relative positions of each component are fixed, such as maintaining a safe electrical distance between the circuit breaker and the transformer, and standardizing the busbar wiring path. This avoids the wiring chaos and space waste caused by traditional decentralized installation, and is especially suitable for compact scenarios such as distribution boxes and distribution cabinets.

[0030] Further preferably, the low-voltage power input line 10 includes a first set of low-voltage power input lines 11 and a second set of low-voltage power input lines 12, which are located on opposite sides of the bracket 40. Arranging the first and second sets of low-voltage power input lines 12 on opposite sides of the bracket 40 increases the distance between the two sets of power input lines. Since the electromagnetic fields generated by different power input lines interact, the increased distance weakens the electromagnetic coupling effect, thereby reducing electromagnetic interference between the two sets of power supplies.

[0031] Further preferably, the incoming line frame circuit breaker 20 includes a first set of frame circuit breakers 21 and a second set of frame circuit breakers 22. Both the first set of frame circuit breakers 21 and the second set of frame circuit breakers 22 are connected to the bracket 40. The first set of frame circuit breakers 21 is used to be electrically connected to the first set of low-voltage power supply incoming lines 11, and the second set of frame circuit breakers 22 is used to be electrically connected to the second set of low-voltage power supply incoming lines 12.

[0032] Further optimization involves placing the first set of frame circuit breakers 21 and the second set of frame circuit breakers 22 on the same axis, which makes the busbar arrangement connecting the circuit breakers and the power supply line more regular and orderly. The regular busbar arrangement can reduce the situation of busbar crossing and entanglement, and reduce the possibility of short circuit faults caused by busbar insulation damage.

[0033] Specifically, the two sets of low-voltage power supply lines 10 are respectively positioned on opposite sides of the bracket 40, and the two sets of frame circuit breakers are placed on the same axis. This allows construction personnel to clearly distinguish between the different sets of power supply lines and circuit breakers during installation, enabling them to install them according to the predetermined positions and sequences, reducing confusion and errors during the installation process. Moreover, this layout provides more operating space for installation tools and equipment, improving installation efficiency.

[0034] Further preferred, the first group of frame circuit breakers 21 includes a first frame circuit breaker 211 and a second frame circuit breaker 212, and the second group of frame circuit breakers 22 includes a third frame circuit breaker 221 and a fourth frame circuit breaker 222; wherein, the first frame circuit breaker 211 and the third frame circuit breaker 221 are interconnected by a busbar, and the second frame circuit breaker 212 and the fourth frame circuit breaker 222 are interconnected by a busbar.

[0035] Preferably, the neutral line transformer 30 includes: a first neutral line transformer 31, a second neutral line transformer 32, a third neutral line transformer 33, and a fourth neutral line transformer 34, wherein the first neutral line transformer 31 and the second neutral line transformer 32 correspond to the first group of frame circuit breakers 21, and the third neutral line transformer 33 and the fourth neutral line transformer 34 correspond to the second group of frame circuit breakers 22.

[0036] Preferably, the first neutral line transformer 31, the second neutral line transformer 32, the third neutral line transformer 33 and the fourth neutral line transformer 34 are arranged on the same axis to optimize the spatial arrangement of the neutral line transformer 30 within the bracket 40.

[0037] Specifically, see Figure 2 and Figure 3 The busbar interconnection structure 1 in this application consists of two sets of low-voltage power supply lines 10, four frame circuit breakers, and four neutral line transformers 30. The two sets of low-voltage power supply lines 10 are arranged on opposite sides of the bracket 40. The four frame circuit breakers are, from left to right, the first frame circuit breaker 211, the second frame circuit breaker 212, the third frame circuit breaker 221, and the fourth frame circuit breaker 222. The corresponding neutral line transformers 30 are, from left to right, the first neutral line transformer 31, the second neutral line transformer 32, the third neutral line transformer 33, and the fourth neutral line transformer 34. The first frame circuit breaker 211 and the second frame circuit breaker 212 constitute the first group of frame circuit breakers 21 near the left side of the support 40, and the third frame circuit breaker 221 and the fourth frame circuit breaker 222 constitute the second group of frame circuit breakers 22 near the right side of the support 40. The neutral line circuit of each circuit breaker is connected to the corresponding neutral line transformer 30.

[0038] Specifically, the first group of low-voltage power supply incoming lines 11 is connected to the first frame circuit breaker 211 and the second frame circuit breaker 212, and the second group of low-voltage power supply incoming lines 12 is connected to the third frame circuit breaker 221 and the fourth frame circuit breaker 222. Therefore, under the same power supply group, the first frame circuit breaker 211 and the second frame circuit breaker 212 are short-circuited with the input side of the corresponding neutral line transformer 30, and similarly, the third frame circuit breaker 221 and the fourth frame circuit breaker 222 are short-circuited with the corresponding neutral line transformer 30. When the input side of the current transformer 30 is short-circuited, under different power supply groups, that is, when the first frame circuit breaker 211 and the third frame circuit breaker 221 are short-circuited with the output side of the corresponding neutral line current transformer 30, and the second frame circuit breaker 212 and the fourth frame circuit breaker 222 are short-circuited with the output side of the corresponding neutral line current transformer 30, the neutral lines of the two power supply groups are interconnected through the busbar. Therefore, regardless of which power supply group is supplied, unified monitoring can be achieved, avoiding the blind spots of single busbar segmented monitoring, and thus real-time monitoring of the neutral line current of the branch circuit.

[0039] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A busbar interconnection structure, characterized in that, include: At least two sets of low-voltage power supply incoming lines, multiple incoming line frame circuit breakers and multiple neutral line transformers, each set of the low-voltage power supply incoming lines is equipped with at least two of the incoming line frame circuit breakers, and the neutral line circuit of each incoming line frame circuit breaker is connected to the corresponding neutral line transformer; In this configuration, multiple incoming line frame circuit breakers corresponding to the same group of low-voltage power supply incoming lines are short-circuited to the input side of the neutral line transformer, multiple incoming line frame circuit breakers corresponding to different groups of low-voltage power supply incoming lines are short-circuited to the output side of the neutral line transformer, and the neutral lines of multiple groups of low-voltage power supply incoming lines are interconnected through busbars.

2. The busbar interconnection structure as described in claim 1, characterized in that, Also includes: The bracket contains the low-voltage power supply line, the incoming line frame circuit breaker, and the neutral line transformer.

3. The busbar interconnection structure as described in claim 2, characterized in that, The incoming line frame circuit breaker is fixed by the bracket to be raised relative to the ground.

4. The busbar interconnection structure as described in claim 2, characterized in that, The low-voltage power supply line includes a first set of low-voltage power supply lines and a second set of low-voltage power supply lines, which are located on opposite sides of the bracket.

5. The busbar interconnection structure as described in claim 4, characterized in that, The incoming line frame circuit breaker includes a first set of frame circuit breakers and a second set of frame circuit breakers. Both the first set of frame circuit breakers and the second set of frame circuit breakers are connected to the bracket. The first set of frame circuit breakers is used to electrically connect to the first set of low-voltage power supply incoming lines, and the second set of frame circuit breakers is used to electrically connect to the second set of low-voltage power supply incoming lines.

6. The busbar interconnection structure as described in claim 5, characterized in that, The first group of frame circuit breakers and the second group of frame circuit breakers are arranged on the same axis.

7. The busbar interconnection structure as described in claim 5, characterized in that, The first group of frame circuit breakers includes a first frame circuit breaker and a second frame circuit breaker, and the second group of frame circuit breakers includes a third frame circuit breaker and a fourth frame circuit breaker. The first frame circuit breaker and the third frame circuit breaker are interconnected via a busbar, and the second frame circuit breaker and the fourth frame circuit breaker are interconnected via a busbar.

8. The busbar interconnection structure as described in claim 7, characterized in that, The neutral line transformer includes: a first neutral line transformer, a second neutral line transformer, a third neutral line transformer, and a fourth neutral line transformer, wherein the first neutral line transformer and the second neutral line transformer correspond to the first group of frame circuit breakers, and the third neutral line transformer and the fourth neutral line transformer correspond to the second group of frame circuit breakers.

9. The busbar interconnection structure as described in claim 8, characterized in that, The first neutral line transformer, the second neutral line transformer, the third neutral line transformer, and the fourth neutral line transformer are arranged on the same axis.

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