Bus duct grounding system

Abstract

The utility model belongs to the field of bus ducts, in particular to a bus duct grounding system, which comprises a plurality of connectors, a plurality of sections of buses, bus ducts and bus duct side plates, bus duct side lugs are arranged on the bus ducts, the connectors are arranged between two connected sections of buses through detachable structures, the bus ducts are connected through the connectors, and the bus duct side plates are arranged on the bus ducts. The bus duct side plates are connected with the bus duct side lugs, the connectors are connected with PE grounding bars, the PE grounding bars are connected with the corresponding bus duct side plates, and one end of each PE grounding bar is connected with a cable PE phase grounding copper bar. According to the utility model, the non-magnetic material aluminum alloy shell with good conductivity is adopted as the protective ground wire and surrounds the conducting bar, and the protective ground wire is close to the three-phase busbar as far as possible, so that the reactance is minimum, and the protective ground wire and the three-phase busbar are equal in distance and reactance, and therefore, no matter a short-time fault or a continuous relative-to-ground short-circuit fault occurs, the fault can be prevented from being damaged. The grounding mode is better than the mode of independently arranging the PE bar.

Description

Technical Field

[0001] This utility model relates to the field of busbar technology, and in particular to a busbar grounding system. Background Technology

[0002] Busbar trunking is a closed metal device composed of copper or aluminum busbar columns, used to distribute large amounts of power to various components in a distributed system. It is increasingly replacing electrical wires and cables in indoor low-voltage power transmission trunk line projects. However, busbar trunking grounding typically uses a single copper busbar as the PE busbar, which wastes resources and labor, and reduces product competitiveness.

[0003] In addition, the traditional protective earth (PE) conductor is placed inside the busbar trunking on one side. Due to electromagnetic induction, the fault current induced in the protective earth is 50% higher than the theoretical calculation, as measured. At the same time, the distance between the three-phase conductors and the PE conductor is not equal, and the inductance is also not equal. When the line is long, the three phases are severely unbalanced under the fault current. Due to long-term corrosion, the connection between the outer shell and the PE conductor is poor, resulting in poor grounding continuity. Therefore, we proposed a busbar trunking grounding system to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a busbar grounding system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The busbar grounding system includes multiple connectors, multiple busbar sections, busbar trunking, and busbar trunking side plates. The busbar trunking is equipped with busbar trunking side lugs. Connected busbar sections are connected via a detachable connector, and the busbar trunking is connected to the connectors. The busbar trunking side plates are connected to the busbar trunking side lugs. A PE grounding busbar is connected to each connector, and the PE grounding busbar is connected to the corresponding busbar trunking side plate. One end of the PE grounding busbar is connected to a cable PE phase grounding copper busbar. A four-phase main busbar is installed on the connector.

[0007] Preferably, multiple heat sinks are fixedly installed on the side plate of the busbar trunking, and the multiple heat sinks are arranged at equal intervals.

[0008] Preferably, the busbar trunking side plate is provided with a busbar trunking cover plate, a guide mechanism is provided between the busbar trunking side plate and the busbar trunking cover plate, and a positioning mechanism for positioning the busbar trunking side plate is provided on the busbar trunking cover plate.

[0009] Preferably, the guiding mechanism includes a dovetail groove and a dovetail seat. A dovetail groove with an open top is provided on one side of the busbar cover plate, and a dovetail seat is installed at the bottom of the busbar side plate, and the dovetail seat can be installed in the corresponding dovetail groove.

[0010] Preferably, the positioning mechanism includes a hemispherical groove, a movable groove, and a protrusion. The hemispherical groove is formed on the bottom of the busbar trunking side plate, and the movable groove is formed on the top of the busbar trunking cover plate. A protrusion adapted to the hemispherical groove is slidably installed in the movable groove.

[0011] Preferably, a fixing spring is fixedly installed at the bottom of the protrusion, and the bottom end of the fixing spring is fixedly installed on the bottom inner wall of the moving groove.

[0012] Preferably, the bottom of the busbar trunking cover plate is provided with a groove, the bottom of the busbar trunking side plate is provided with a mounting hole, and the mounting hole is connected to the groove, and a mounting mechanism is provided between the mounting hole and the groove.

[0013] Preferably, the mounting mechanism includes a fixing nut and a fixing screw. The fixing nut is fixedly mounted on the top inner wall of the groove, and the fixing screw, which is threadedly connected to the fixing nut, is installed in the mounting hole.

[0014] The beneficial effects of this utility model are:

[0015] 1. The busbar trunking side plates and busbar trunking cover plates are made of aluminum-magnesium alloy profiles. The busbar trunking side plates are installed into the dovetail grooves on the busbar trunking cover plates through dovetail seats. At the same time, heat sinks and dovetail seats are designed on the busbar trunking side plates, which not only facilitates the heat dissipation of the busbar trunking, but also strengthens the rigidity of the outer shell, facilitates installation, and reduces the weight of the busbar trunking. This allows for large-span design and reduces the number of installation supports.

[0016] 2. With the positioning mechanism, when the busbar trunking side plate is installed on the busbar trunking cover plate, the fixing spring can press the protrusion upward under the action of the fixing spring, so that the protrusion can be inserted into the corresponding hemispherical groove, thereby achieving the purpose of positioning the busbar trunking side plate. The fixing screw is installed into the mounting hole and the fixing nut can be screwed in, thereby achieving the purpose of fixing the connection between the busbar trunking side plate and the busbar trunking cover plate.

[0017] 3. By using a non-magnetic aluminum alloy shell with good conductivity as the protective grounding wire, surrounding the busbar, and placing it as close as possible to the three-phase busbar, the reactance can be minimized. Furthermore, the distance between the protective grounding wire and the three-phase busbar is equal, resulting in the same reactance. Therefore, this grounding method is better than a separate PE busbar for both short-term and continuous phase-to-ground short-circuit faults. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the busbar grounding system proposed in this utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of the busbar trunking side plate and busbar trunking cover plate of the busbar trunking grounding system proposed in this utility model;

[0020] Figure 3 for Figure 2 A cross-sectional three-dimensional structural diagram;

[0021] Figure 4 for Figure 3 A schematic diagram of the structure of part A in the diagram;

[0022] Figure 5 for Figure 3 A schematic diagram of part B in the diagram.

[0023] In the diagram: 1. Connector; 2. Busbar trunking side lug; 3. Busbar trunking side plate; 4. PE grounding busbar; 5. Four-phase main busbar; 6. Busbar trunking cover plate; 7. Cable PE phase grounding copper busbar; 8. Heat sink; 901. Dovetail groove; 902. Dovetail seat; 1001. Hemispherical groove; 1002. Moving groove; 1003. Protrusion; 1004. Fixing spring; 1101. Groove; 1102. Fixing nut; 1103. Mounting hole; 1104. Fixing screw. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0025] This application discloses a busbar grounding system.

[0026] Reference Figure 1-5 The busbar grounding system includes multiple connectors 1, multiple busbar sections, busbar trunking, and busbar trunking side plates. Busbar trunking side ears 2 are installed on the busbar trunking. Connecting two busbar sections are connected by a detachable structure to install connectors 1, and the busbar trunking is connected through connectors 1. The busbar trunking side plates 3 are connected to the busbar trunking side ears 2. PE grounding busbars 4 are connected to the connectors 1, and the PE grounding busbars 4 are connected to the corresponding busbar trunking side plates 3. One end of the PE grounding busbar 4 is connected to a cable PE phase grounding copper busbar 7. Four-phase main busbars 5 are installed on the connectors 1. More specifically, the busbar trunking side plates 3 and busbar trunking cover plates 6 are made of aluminum-magnesium alloy profiles, and the non-magnetic aluminum alloy shell with good conductivity is used as the protective grounding wire.

[0027] In this embodiment, multiple heat sinks 8 are fixedly installed on the side plate 3 of the busbar trunking, and the multiple heat sinks 8 are arranged at equal intervals. The heat sinks 8 facilitate the heat dissipation of the busbar trunking.

[0028] In this embodiment, a busbar trunking cover plate 6 is provided on the busbar trunking side plate 3, and a guide mechanism is provided between the busbar trunking side plate 3 and the busbar trunking cover plate 6. The busbar trunking cover plate 6 is provided with a positioning mechanism for positioning the busbar trunking side plate 3. The guide mechanism includes a dovetail groove 901 and a dovetail seat 902. A dovetail groove 901 with an open top is provided on one side of the busbar trunking cover plate 6, and a dovetail seat 902 is installed at the bottom of the busbar trunking side plate 3. The dovetail seat 902 can be installed in the corresponding dovetail groove 901. By providing the dovetail groove 901 and the dovetail seat 902, the connection stability between the busbar trunking side plate 3 and the busbar trunking cover plate 6 can be increased, thereby increasing the rigidity of the outer shell.

[0029] In this embodiment, the positioning mechanism includes a hemispherical groove 1001, a movable groove 1002, and a protrusion 1003. The hemispherical groove 1001 is formed on the bottom of the busbar trunking side plate 3, and the movable groove 1002 is formed on the top of the busbar trunking cover plate 6. A protrusion 1003 adapted to the hemispherical groove 1001 is slidably installed in the movable groove 1002. A fixing spring 1004 is fixedly installed at the bottom of the protrusion 1003, and the bottom end of the fixing spring 1004 is fixedly installed on the bottom inner wall of the movable groove 1002. By providing the protrusion 1003 and the hemispherical groove 1001, the purpose of positioning the busbar trunking side plate 3 can be achieved.

[0030] In this embodiment, a groove 1101 is provided at the bottom of the busbar trunking cover plate 6, and a mounting hole 1103 is provided at the bottom of the busbar trunking side plate 3. The mounting hole 1103 is connected to the groove 1101, and a mounting mechanism is provided between the mounting hole 1103 and the groove 1101. The mounting mechanism includes a fixing nut 1102 and a fixing screw 1104. The fixing nut 1102 is fixedly installed on the top inner wall of the groove 1101, and the fixing screw 1104, which is threadedly connected to the fixing nut 1102, is installed in the mounting hole 1103. By providing the fixing screw 1104 and the fixing nut 1102, the purpose of connecting the busbar trunking side plate 3 and the busbar trunking cover plate 6 can be achieved.

[0031] In this utility model, the busbar trunking side plate 3 and the busbar trunking cover plate 6 are made of aluminum-magnesium alloy profiles. The busbar trunking side plate 3 is installed into the dovetail groove 901 on the busbar trunking cover plate 6 via a dovetail seat 902. Simultaneously, the busbar trunking side plate 3 is designed with heat sinks 8 and dovetail seats 902, which not only facilitates heat dissipation of the busbar trunking but also strengthens the rigidity of the outer shell, facilitates installation, and reduces the weight of the busbar trunking. This allows for a large span design and reduces the number of mounting brackets. With a positioning mechanism, when the busbar trunking side plate 3 is installed on the busbar trunking cover plate 6, the fixing spring 1004 can engage the protrusion. The upward pressing of 1003 allows the protrusion 1003 to insert into the corresponding hemispherical groove 1001, thereby achieving the purpose of positioning the busbar side plate 3. Installing the fixing screw 1104 into the mounting hole 1103 and screwing in the fixing nut 1102 achieves the purpose of fixing the busbar side plate 3 to the busbar cover plate 6. Using a non-magnetic aluminum alloy shell with good conductivity as the protective grounding wire, surrounding the conductive busbar, and being as close as possible to the three-phase busbar, minimizes reactance. Furthermore, the protective grounding wire is equidistant from the three-phase busbar, resulting in the same reactance. Therefore, this grounding method is better than a separate PE busbar for both short-term and continuous phase-to-ground short-circuit faults.

[0032] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A busbar grounding system, characterized in that, It includes multiple connectors (1), multiple busbars, busbar troughs and busbar trough side plates (3). The busbar troughs are equipped with busbar trough side ears (2). Connectors (1) are installed between two connected busbars through a detachable structure. The busbar troughs are connected through connectors (1). The busbar trough side plates (3) are connected to the busbar trough side ears (2). The connector (1) is connected to a PE grounding busbar (4), and the PE grounding busbar (4) is connected to the corresponding busbar trunking side plate (3). One end of the PE grounding busbar (4) is connected to a cable PE phase grounding copper busbar (7). The connector (1) is equipped with a four-phase main busbar (5).

2. The busbar grounding system according to claim 1, characterized in that, Multiple heat sinks (8) are fixedly installed on the side plate (3) of the busbar trunking, and the multiple heat sinks (8) are arranged at equal intervals.

3. The busbar grounding system according to claim 1, characterized in that, The busbar trunking side plate (3) is provided with a busbar trunking cover plate (6), a guide mechanism is provided between the busbar trunking side plate (3) and the busbar trunking cover plate (6), and a positioning mechanism for positioning the busbar trunking side plate (3) is provided on the busbar trunking cover plate (6).

4. The busbar grounding system according to claim 3, characterized in that, The guiding mechanism includes a dovetail groove (901) and a dovetail seat (902). A dovetail groove (901) with an open top is provided on one side of the busbar cover plate (6). A dovetail seat (902) is installed at the bottom of the busbar side plate (3), and the dovetail seat (902) can be installed in the corresponding dovetail groove (901).

5. The busbar grounding system according to claim 3, characterized in that, The positioning mechanism includes a hemispherical groove (1001), a movable groove (1002), and a protrusion (1003). The hemispherical groove (1001) is opened on the bottom of the busbar side plate (3), and the movable groove (1002) is opened on the top of the busbar cover plate (6). A protrusion (1003) adapted to the hemispherical groove (1001) is slidably installed in the movable groove (1002).

6. The busbar grounding system according to claim 5, characterized in that, A fixing spring (1004) is fixedly installed at the bottom of the protrusion (1003), and the bottom end of the fixing spring (1004) is fixedly installed on the bottom inner wall of the moving groove (1002).

7. The busbar grounding system according to claim 3, characterized in that, The bottom of the busbar trunking cover plate (6) is provided with a groove (1101), and the bottom of the busbar trunking side plate (3) is provided with an installation hole (1103). The installation hole (1103) is connected to the groove (1101), and an installation mechanism is provided between the installation hole (1103) and the groove (1101).

8. The busbar grounding system according to claim 7, characterized in that, The mounting mechanism includes a fixing nut (1102) and a fixing screw (1104). The fixing nut (1102) is fixedly installed on the top inner wall of the groove (1101), and the fixing screw (1104) is installed in the mounting hole (1103) and threadedly connected to the fixing nut (1102).

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