Photovoltaic direct-current access bus system for electrolytic cell of electrolytic aluminum factory

Abstract

The utility model relates to a photovoltaic direct-current access bus system for an electrolytic cell of an electrolytic aluminum factory, and belongs to the technical field of new energy power supply of the electrolytic aluminum factory, one end of the photovoltaic direct-current access bus system is connected with a photovoltaic power generation system, and the other end is connected with a power supply system of the electrolytic cell. Output ends of a positive bus protection cabinet and a negative bus protection cabinet of a photovoltaic power generation system are connected with an aluminum rectangular bus through output end flexible connection devices, all bus sections are connected through bus flexible connection devices and / or bus hard connection devices, and the aluminum rectangular bus is connected with an input end of a direct-current isolating switch at the access position of a direct-current bus bar. The input end of the direct-current isolating switch is connected with an aluminum rectangular bus; and the aluminum rectangular bus is connected with a direct-current bus bar of an electrolytic bath power supply system through a bus flexible connection device. According to the utility model, reliable connection between the photovoltaic power generation system and the electrolytic bath power supply system of the electrolytic aluminum factory is ensured, and the electric energy utilization efficiency of photovoltaic power generation is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of new energy power supply for aluminum electrolysis plants, and in particular relates to a photovoltaic direct current access busbar system for electrolytic cells in aluminum electrolysis plants. Background Art

[0002] my country is the world's largest coal producer and consumer, with nearly 76% of its energy supplied by coal. This over-reliance on fossil fuels has caused significant negative environmental, economic and social impacts. As a high-energy-consuming enterprise, aluminum smelters have always been large electricity consumers in various regions. Green new energy power generation represented by photovoltaic power generation has gradually become the electricity choice of aluminum smelters.

[0003] The traditional photovoltaic power generation process mainly involves the inverter and step-up transformer converting the DC power generated by the photovoltaic panel into AC power, and then regulating the voltage to supply it to the load side. If the photovoltaic power generation system supplies electricity to the electrolytic cell in the traditional way, there is a link of first inversion (converting DC to AC) and then rectification (converting AC to DC), which reduces the efficiency of electricity use. More and more aluminum plants are trying to directly apply the DC power generated by the photovoltaic power generation system to the power supply of the electrolytic cell, while ensuring the reliability and safety of the connection between the two systems, so as to maximize the advantages of green electricity. Therefore, it is very important to achieve a reliable connection between the photovoltaic power generation system and the power supply system of the electrolytic cell of the aluminum smelter. Utility Model Content

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a photovoltaic DC access busbar system for the electrolytic cell of an aluminum smelter, which ensures that the photovoltaic power generation system is reliably connected to the power supply system of the electrolytic cell of the aluminum smelter, thereby improving the energy utilization efficiency of photovoltaic power generation.

[0005] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0006] A photovoltaic DC access busbar system for an electrolytic cell of an aluminum smelter, wherein one end of the photovoltaic DC access busbar system is connected to a photovoltaic power generation system, and the other end is connected to a power supply system of the electrolytic cell; the output ends of the positive and negative busbar protection cabinets of the photovoltaic power generation system are connected to an aluminum rectangular busbar through an output end soft connection device; each busbar section is connected through a busbar soft connection device and / or a busbar hard connection device; at a DC busbar access point, the aluminum rectangular busbar is connected to an input end of a DC isolating switch; the input end of the DC isolating switch is connected to the aluminum rectangular busbar; and the aluminum rectangular busbar is connected to a DC busbar of a power supply system of an electrolytic cell through a busbar soft connection device.

[0007] Furthermore, a DC current sensor is provided on the busbar section where the input end of the DC isolating switch is connected to the aluminum rectangular busbar.

[0008] Furthermore, the output end soft connection device makes the contact current density at the connection not higher than 0.1A / mm 2 The output end soft connection device includes two aluminum connecting plates and two groups of aluminum thin plates. One end of the connecting plate is connected to the output end busbar of the busbar protection cabinet, and the other end is connected to the aluminum rectangular busbar through the aluminum thin plate group. The connecting plate is provided with bolt holes that match the output end busbar of the busbar protection cabinet.

[0009] Furthermore, the length of each section of the aluminum rectangular busbar is not longer than 6 meters, and a busbar soft connection device is provided within every 30 meters of the busbar length between each busbar section, and the rest are busbar hard connection devices.

[0010] Furthermore, the busbar hard connection device includes a plurality of aluminum plates arranged from top to bottom, and the left and right sides of the aluminum plates are connected to the aluminum rectangular busbar.

[0011] Furthermore, the busbar flexible connection device includes two groups of aluminum sheet groups, and the aluminum sheet groups are composed of a plurality of 1 mm thick aluminum sheets.

[0012] Furthermore, each aluminum rectangular busbar is provided with a busbar support fixture every 4 to 6 meters, and the busbar support fixture includes a busbar live fixing fixture and a busbar dead fixing fixture.

[0013] Furthermore, busbar fixed fixtures are arranged at the starting point and the end point of the busbar connection, and busbar movable fixtures are arranged at the remaining positions.

[0014] Furthermore, the busbar movable fixing fixture includes a channel steel a, a steel plate a, a support insulator a, a channel steel b, and a steel plate b connected in sequence from the direction away from the busbar to the direction of the busbar. The steel plate b is provided with a steel plate c and a steel plate d vertically connected to each other. The steel plate d is an L-shaped steel plate, and the steel plate c is a triangular steel plate. The steel plate c and the steel plate d are vertically connected to form a supporting structure. The steel plate c and the steel plate d are perpendicular to the steel plate b at the same time. A busbar trough a is formed between the two groups of supporting structures and the steel plate b, and the busbar is inserted into the busbar trough a.

[0015] Furthermore, the busbar fixed fixture includes a channel steel c, a steel plate e, a support insulator b, a channel steel d, and a steel plate f connected in sequence from the direction away from the busbar to the direction of the busbar. A pair of channel steels e perpendicular to the steel plate f is provided above the steel plate f. The pair of channel steels e and the steel plate f form a busbar trough b. The busbar is placed in the busbar trough b. An angle steel busbar clamp is provided on the top of the busbar. The angle steel busbar clamp is fixedly connected to the channel steel e by long bolts to fix the busbar.

[0016] The beneficial effects of the utility model are:

[0017] 1. The photovoltaic DC access busbar system for the electrolytic cell of the electrolytic aluminum plant of the utility model can improve the energy utilization efficiency of photovoltaic power generation, directly apply the DC power output by photovoltaic power generation to the power supply of the electrolytic cell, and reduce equipment investment;

[0018] 2. The utility model of the photovoltaic DC access busbar system for the electrolytic cell of the aluminum smelter does not need to change the original power supply system configuration of the electrolytic cell, and is not only suitable for the construction of new aluminum smelters, but also for the upgrading and reconstruction of existing aluminum smelters;

[0019] 3. The utility model of the photovoltaic DC busbar access system for the electrolytic cell of the electrolytic aluminum plant comprehensively considers the problems of thermal expansion stress and construction deviation of the busbar, and solves the problem of difficult construction of hard busbar connection by combining the application of busbar live fixing fixtures and dead fixing fixtures and busbar soft connection devices;

[0020] 4. The utility model sets an isolating switch at the busbar access point to separate the photovoltaic power generation system from the electrolyzer DC power supply system when the power generation system is shut down, thereby ensuring the safety of maintenance;

[0021] 5. The utility model realizes the electricity metering of the photovoltaic DC access system by setting a current sensor at the bus access point. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the photovoltaic DC access busbar system of the electrolytic cell of the electrolytic aluminum plant of the utility model;

[0023] Figure 2 This is a schematic diagram of the main structure of the output end soft connection device;

[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of the output end soft connection device at AA;

[0025] Figure 4 It is a schematic diagram of the structure of the busbar soft connection device;

[0026] Figure 5 for Figure 4 Schematic diagram of the middle BB direction;

[0027] Figure 6 It is a schematic diagram of the structure of the busbar hard connection device;

[0028] Figure 7 for Figure 6 Schematic diagram of CC direction;

[0029] Figure 8 for Figure 7 Enlarged view of point D in the middle;

[0030] Fig. 9 This is a schematic diagram of the main structure of the busbar movable fixing fixture;

[0031] Fig.10 This is a schematic diagram of the side view of the busbar movable fixing fixture;

[0032] Fig.11 This is a schematic diagram of the side view of the busbar dead fixing fixture;

[0033] Fig.12 This is a schematic diagram of the side view of the busbar dead fixation fixture.

[0034] In the figure: 1 is a photovoltaic power generation system, 1-1 is a photovoltaic module, 1-2 is a boost energy router, 1-3 is a step-down energy router, 1-4 is a negative bus protection cabinet, 1-5 is a positive bus protection cabinet, 2 is a photovoltaic DC access bus system, 2-1 is an output end soft connection device, 2-1-1 is a connection plate, 2-1-2 is an aluminum sheet group A, 2-1-3 is a bolt hole, 2-2 is a bus hard connection device, 2-2-1 is an aluminum plate, 2-3 is a bus soft connection device, 2-3-1 is an aluminum sheet group B, 2-4 is an aluminum rectangular bus, 2-5 is a DC disconnector, 2-6 is a DC current sensor, 3 is a power supply system for an electrolyzer, 3 -1 is the DC busbar, 3-2 is the rectifier cabinet, 3-3 is the rectifier transformer, 3-4 is the voltage regulating transformer, 3-5 is the busbar II, 3-6 is the busbar I, 3-7 is the power grid incoming line, 4 is the electrolytic cell, 5 is the busbar movable fixing fixture, 5-1 is the channel steel a, 5-2 is the steel plate a, 5-3 is the support insulator a, 5-4 is the channel steel b, 5-5 is the steel plate b, 5-6 is the steel plate c, 5-7 is the steel plate d, 6 is the busbar fixed fixing fixture, 6-1 is the channel steel c, 6-2 is the steel plate e, 6-3 is the support insulator b, 6-4 is the channel steel d, 6-5 is the steel plate f, 6-6 is the channel steel e, 6-7 is the angle steel busbar clamp, and 6-8 is the long bolt. DETAILED DESCRIPTION

[0035] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0036] In order to realize the direct current generated by the photovoltaic power generation system to be directly used for the power supply of the electrolytic cell, while ensuring the reliability and safety of the connection between the two systems, the utility model proposes a photovoltaic direct current access busbar system for the electrolytic cell of the electrolytic aluminum plant, such as Figure 1As shown, one end of the photovoltaic DC access busbar system 2 is connected to the photovoltaic power generation system 1, and the other end is connected to the power supply system 3 of the electrolyzer. The output end of the photovoltaic module 1-1 in the photovoltaic power generation system 1 is connected to the boost energy router 1-2 and the step-down energy router 1-3 in sequence, and then the output end is connected to the negative busbar protection cabinet 1-4 and the positive busbar protection cabinet 1-5. The output ends of the negative busbar protection cabinet 1-4 and the positive busbar protection cabinet 1-5 are connected to the aluminum rectangular busbar 2-4 through the output end soft connection device 2-1, and each busbar section is connected through the busbar soft connection device 2-3 and / or the busbar hard connection device 2-2. At the DC busbar 3-1 access point, the aluminum rectangular busbar 2-4 is connected to the input end of the DC disconnector 2-5, and the input end of the DC disconnector 2-5 is connected to the aluminum rectangular busbar 2-4, so that when the power generation system is shut down, the photovoltaic power generation system 1 is separated from the power supply system 3 of the electrolyzer to ensure the safety of maintenance. The aluminum rectangular busbar 2-4 is connected to the DC busbar 3-1 of the electrolyzer power supply system 1 through the busbar soft connection device 2-3. The setting of soft connection and hard connection is to avoid the busbar section length being too long, which is convenient for transportation and construction. The design of soft connection and hard connection both considers the current sharing at the connection. In addition, the soft connection can also alleviate the thermal expansion and contraction of the busbar and eliminate the influence caused by errors during construction.

[0037] The power supply system 3 of the electrolytic cell is usually equipped with 7 to 10 sets of rectifiers according to the requirements of the electrolytic cell series current, etc. Each set of rectifiers is mainly composed of a distribution device, a voltage regulating transformer 3-4, a rectifier transformer 3-3, a rectifier cabinet 3-2, a DC bus 3-1, etc., which converts the AC power on the grid side into DC power and provides DC power for the electrolytic aluminum plant. The grid incoming line 3-7 is connected to the power supply bus, namely the II bus 3-5 and the I bus 3-6, through a circuit breaker and an isolating switch, and converts the AC power into DC power through the voltage regulating transformer 3-4, the rectifier transformer 3-3, and the rectifier 3-2, which is converged through the bus 3-1 and supplied to the electrolytic cell through the bus 4.

[0038] The output end of the negative bus protection cabinet 1-4 and the positive bus protection cabinet 1-5 is the starting end of the bus connection for photovoltaic DC access. The positive and negative DC busbars of the electrolyzer power supply system are selected as the terminal access end to complete the connection of the busbar. The output end of the positive bus protection cabinet 1-5 is connected to the positive DC busbar of the electrolyzer power supply system through the busbar connection, and the output end of the negative bus protection cabinet 1-4 is connected to the negative DC busbar of the electrolyzer power supply system through the busbar connection system.

[0039] Specifically, a DC current sensor 2-6 is provided on the busbar section where the input end of the DC disconnector 2-5 is connected to the aluminum rectangular busbar 2-4 to measure the current of the photovoltaic DC access busbar system 2, thereby realizing electricity metering.

[0040] Specifically, the output end flexible connection device 2-1 should ensure that the contact current density at the connection is not higher than 0.1A / mm 2 , two connecting plates 2-1-1 are used to clamp the output busbar. More specifically, Figure 2-3 As shown, the output end soft connection device 2-1 includes two aluminum connecting plates 2-1-1 and two groups of aluminum sheet groups A2-1-2. The length of the aluminum sheet group A2-1-2 can be 300 mm, and the specific length can be adjusted according to actual conditions. One end of the connecting plate 2-1-1 is connected to the output end busbar of the busbar protection cabinet, and the other end is connected to the aluminum rectangular busbar 2-4 through the aluminum sheet group A2-1-2. The connecting plate 2-1-1 is provided with bolt holes 2-1-3 that match the output end busbar of the busbar protection cabinet. The height h of the connecting plate 2-1-1 is consistent with the height of the output end busbar of the busbar protection cabinet, the length L1 is adjusted according to actual needs, the thickness is d (the thickness of the aluminum busbar) / 2, and the connecting plate 2-1-1 is provided with bolt holes 2-1-3, and the bolt holes 2-1-3 are required according to the output end busbar of the busbar protection cabinet. The aluminum sheet group A2-1-2 is composed of several aluminum sheets with a thickness of 1mm. The height h of the aluminum sheets is consistent with the height of the connecting aluminum plate. The specific number is determined according to the thickness d (mm) of the aluminum busbar, which is: 1 / 2d minus 1mm. The number is rounded down. For example, if d is 101mm, the number is 49. This setting can ensure the current density and facilitate construction.

[0041] Specifically, in order to reduce the difficulty of construction, the length of each section of the aluminum rectangular busbar 2-4 is no longer than 6 meters, and each busbar section is connected by a busbar soft connection device 2-3 or a busbar hard connection device 2-2, ensuring that a soft connection device is set within every 30 meters of busbar length, and the rest are hard connection devices. Both soft connections and hard connections are designed to avoid excessive length of busbar sections, which is convenient for transportation and construction. The design of both soft connections and hard connections takes into account the current sharing at the connection. In addition, the soft connection can also alleviate the thermal expansion and contraction of the busbar, and eliminate the impact of errors during construction.

[0042] Specifically, Figure 4-5 As shown, the busbar flexible connection device 2-3 includes two groups of aluminum sheet groups B2-3-1, and the aluminum sheet group B2-3-1 is composed of several aluminum sheets with a thickness of 1mm. The height is determined by the height h of the aluminum rectangular busbar 2-4. The height of the aluminum sheet group B2-3-1 is 1 / 2h-2mm, that is, 1 / 2h minus 2mm, and the length is 400mm. It can be adjusted according to actual conditions. The specific number is determined according to the thickness d (mm) of the aluminum busbar, which is: d-1, that is, d minus 1mm. The busbar flexible connection device 2-3 is set in this way to ensure current density and facilitate construction.

[0043] Specifically, Figure 6-8As shown, the busbar hard connection device 2-2 includes a plurality of aluminum plates 2-2-1 arranged from top to bottom, and the left and right sides of the aluminum plates 2-2-1 are connected to the aluminum rectangular busbar 2-4. The busbar hard connection device 2-2 can be made of a 10mm thick aluminum plate, the length of the aluminum plate can be 200mm, and the width is consistent with the thickness d of the aluminum rectangular busbar 2-4. The aluminum plates 2-2-1 are separated by 1mm by argon arc welding process. This spacing can increase the conductive efficiency. The specific number is determined according to the height h (mm) of the aluminum busbar, which is: h / 10 -h / 100 (the number is rounded down). The aluminum plates 2-2-1 have slopes on both sides to facilitate weld connection during welding.

[0044] Specifically, each aluminum rectangular busbar is provided with a busbar support clamp every 4 to 6 meters, and the busbar support clamp includes a busbar live fixing clamp 5 and a busbar dead fixing clamp 6. More specifically, a busbar dead fixing clamp 6 is provided at the starting point and end point of the busbar connection, and a busbar live fixing clamp 5 is provided at the remaining positions. The length of the busbar is usually 4 to 6 meters to ensure that each section of the busbar is supported by a clamp. Usually, the busbar live fixing clamp 5 is provided, and a soft connection is usually provided at the starting point and end point. The busbar dead fixing clamp 6 is provided to ensure the stability of the connection and to avoid excessive position deviation of the connection between the starting point and the end point due to the thermal expansion force of the busbar.

[0045] Both flexible and hard connections are designed to avoid excessive length of busbar sections, and to facilitate transportation and construction. Both flexible and hard connections are designed with current sharing at the connection point in mind. In addition, flexible connections can also alleviate the thermal expansion and contraction of the busbar, and eliminate the impact of errors during construction.

[0046] Specifically, Figure 9-10 As shown, the busbar movable fixing fixture 5 includes a channel steel a5-1, a steel plate a5-2, a support insulator a5-3, a channel steel b5-4, and a steel plate b5-5 connected in sequence from the direction away from the busbar to the direction of the busbar. The steel plate b5-5 is provided with a steel plate c5-6 and a steel plate d5-7 vertically connected to each other. The steel plate d5-7 is an L-shaped steel plate, and the steel plate c5-6 is a triangular steel plate. The steel plate c5-6 and the steel plate d5-7 are vertically connected to form a support structure. The steel plate c5-6 and the steel plate d5-7 are perpendicular to the steel plate b5-4 at the same time. The busbar duct a is formed between the two groups of support structures and the steel plate b5-4, and the busbar is inserted into the busbar duct a. The various parts are connected by bolts and washers. The channel steel and the steel plate both play a supporting role. The side plates and triangular plates on both sides, namely the steel plates c5-6 and the steel plates d5-7, are used to fix the busbar so that it does not deviate left and right. 5-3 Insulators ensure the insulation between the busbar and the ground and ensure a safe distance.

[0047] Specifically, Figure 11-12As shown, the busbar fixed fixture 6 includes a channel steel c6-1, a steel plate e6-2, a support insulator b6-3, a channel steel d6-4, and a steel plate f6-5 connected in sequence from the direction away from the busbar to the direction of the busbar. A pair of channel steels e6-6 perpendicular to the steel plate f6-5 are arranged above the steel plate f6-5. The pair of channel steels e6-6 and the steel plate f6-5 form a busbar duct b. The busbar is placed in the busbar duct b. An angle steel busbar clamp 6-7 is arranged on the top of the busbar. The angle steel busbar clamp 6-7 is fixedly connected to the channel steel e6-6 by a long bolt 6-8 to fix the busbar. The various parts are connected by bolts and washers. The channel steel and the steel plate both play a supporting role. The channel steel e6-6 on both sides fix the busbar to the left and right without deviation. The angle steel busbar clamp 6-7 and the long bolt 6-8 above fix the busbar to the top and bottom without deviation. The support insulator 6-3 ensures the insulation of the busbar from the ground and ensures a safe distance.

[0048] Although the embodiments of the present invention have been shown and described above, it is understandable that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Any changes, modifications, substitutions and variations of the above embodiments by a person skilled in the art are all within the scope of the present invention.

Claims

1. A photovoltaic DC access busbar system for an electrolytic cell of an aluminum smelter, wherein one end of the photovoltaic DC access busbar system is connected to a photovoltaic power generation system, and the other end is connected to a power supply system of the electrolytic cell, characterized in that: The output ends of the positive and negative busbar protection cabinets of the photovoltaic power generation system are connected to the aluminum rectangular busbar through the output end soft connection device, and the busbar sections are connected through the busbar soft connection device and / or the busbar hard connection device. At the DC busbar access point, the aluminum rectangular busbar is connected to the input end of the DC disconnector, and the input end of the DC disconnector is connected to the aluminum rectangular busbar. The aluminum rectangular busbar is connected to the DC busbar of the electrolytic cell power supply system through the busbar soft connection device.

2. The photovoltaic DC busbar access system for electrolytic cells of an aluminum smelter according to claim 1 is characterized in that: A DC current sensor is arranged on the busbar section where the input end of the DC isolating switch is connected to the aluminum rectangular busbar.

3. The photovoltaic DC busbar access system for electrolytic cells of an aluminum smelter according to claim 1 is characterized in that: The output end soft connection device makes the contact current density at the connection not higher than 0.1A / mm 2 The output end soft connection device includes two aluminum connecting plates and two groups of aluminum thin sheet groups. One end of the connecting plate is connected to the output end busbar of the busbar protection cabinet, and the other end is connected to the aluminum rectangular busbar through the aluminum thin sheet group. The connecting plate is provided with bolt holes that match the output end busbar of the busbar protection cabinet.

4. The photovoltaic DC access busbar system for electrolytic cells of an aluminum smelter according to claim 1 is characterized in that: The length of each section of the aluminum rectangular busbar is not longer than 6 meters. A busbar soft connection device is installed every 30 meters of busbar length between each busbar section, and the rest are busbar hard connection devices.

5. A photovoltaic DC access busbar system for electrolytic cells of an aluminum smelter according to claim 1 or 4, characterized in that: The busbar hard connection device comprises a plurality of aluminum plates arranged from top to bottom, and the left and right sides of the aluminum plates are connected to the aluminum rectangular busbar.

6. A photovoltaic DC access busbar system for electrolytic cells of an aluminum smelter according to claim 1 or 4, characterized in that: The busbar flexible connection device comprises two groups of aluminum sheet groups, each of which is composed of a plurality of 1 mm thick aluminum sheets.

7. The photovoltaic DC access busbar system for electrolytic cells of an aluminum smelter according to claim 1 is characterized in that: Each aluminum rectangular busbar is provided with a busbar support fixture every 4 to 6 meters, and the busbar support fixture includes a busbar live fixing fixture and a busbar dead fixing fixture.

8. The photovoltaic DC access busbar system for electrolytic cells of an aluminum smelter according to claim 7 is characterized in that: Busbar fixed fixtures are set at the starting point and end point of the busbar connection, and busbar movable fixtures are set at the remaining positions.

9. A photovoltaic DC access busbar system for electrolytic cells of an aluminum smelter according to claim 1, 7 or 8, characterized in that: The busbar movable fixing fixture includes a channel steel a, a steel plate a, a support insulator a, a channel steel b, and a steel plate b which are connected in sequence from a direction away from the busbar to a direction of the busbar. The steel plate b is provided with a steel plate c and a steel plate d which are vertically connected to each other. The steel plate d is an L-shaped steel plate, and the steel plate c is a triangular steel plate. The steel plate c and the steel plate d are vertically connected to form a supporting structure. The steel plate c and the steel plate d are perpendicular to the steel plate b at the same time. A busbar trough a is formed between the two groups of supporting structures and the steel plate b, and the busbar is inserted into the busbar trough a.

10. A photovoltaic DC access busbar system for electrolytic cells of an aluminum smelter according to claim 1, 7 or 8, characterized in that: The busbar fixed fixture includes a channel steel c, a steel plate e, a support insulator b, a channel steel d, and a steel plate f which are connected in sequence from the direction away from the busbar to the direction of the busbar. A pair of channel steels e perpendicular to the steel plate f are arranged above the steel plate f. The pair of channel steels e and the steel plate f form a busbar trough b. The busbar is placed in the busbar trough b. An angle steel busbar clamp is arranged on the top of the busbar. The angle steel busbar clamp is fixedly connected to the channel steel e by long bolts to fix the busbar.

Images