Switch cabinet protection grounding structure

Abstract

The utility model relates to the technical field of switch cabinets, in particular to a protection grounding structure of a switch cabinet. The switch cabinet protection grounding structure comprises an air chamber, a mechanism chamber and a cable chamber below the mechanism chamber are arranged in the air chamber, a partition plate is arranged between the mechanism chamber and the cable chamber, a primary loop installation plate is installed on the inner wall of the mechanism chamber, a grounding column is arranged below the right side of the primary loop installation plate, and the primary loop installation plate is further connected with a main grounding system. The switch cabinet protection grounding structure can be suitable for various switch cabinets and ring main units, the design structure of the grounding mode is simple, operation is convenient, safety and reliability are achieved, and simultaneous grounding protection of multiple cabinets can be achieved.

Description

Technical Field

[0001] The utility model relates to a switch cabinet, in particular to a protection grounding structure of a switch cabinet. Background Art

[0002] During the power distribution process, electric shock accidents often occur, mostly due to the lack of effective grounding of equipment. In the high-voltage complete switch industry, the protection grounding of equipment is particularly crucial. The primary circuit of the switch is 10 kV high voltage. If the shell is not effectively grounded, when the insulation between the high voltage and the shell breaks down and discharges, the shell will be electrified, posing risks of fire and explosion, and even endangering personal safety. Similarly, both primary components and secondary components require reliable protection grounding. For gas-insulated switchgear, the main parts that need to be grounded in the primary part include main circuit grounding, gas chamber grounding, cabinet grounding, and primary components such as transformers. The secondary grounding is mainly for the enclosures and protective grounding of instruments, protection devices, switches, etc. Summary of the Utility Model

[0003] The utility model aims to solve the above defects and provides a protection grounding structure of a switch cabinet.

[0004] To overcome the defects in the background art, the technical solution adopted by the utility model to solve its technical problems is: this protection grounding structure of the switch cabinet includes a gas chamber, which includes a mechanism chamber and a cable chamber below the mechanism chamber. A partition is provided between the mechanism chamber and the cable chamber. An installation plate for the primary circuit is installed on the inner wall of the mechanism chamber. A grounding post is provided below the right side of the installation plate for the primary circuit, and a main grounding system is also connected to the installation plate for the primary circuit.

[0005] According to another embodiment of the utility model, it further includes that the main grounding system includes a grounding bent row. One end of the grounding bent row is installed on the end face of the grounding post, and the other end of the grounding bent row is connected to a vertical grounding row. The vertical grounding row longitudinally penetrates the partition and extends to the bottom of the cable chamber. A transfer row is provided at the bottom of the cable chamber. The vertical grounding row is overlapped with one end of the transfer row. Side plates are provided on both sides of the cable chamber, and grounding row brackets are provided on the two side plates. A main grounding row is horizontally arranged in the cable chamber, and both ends of the main grounding row are connected to the grounding row brackets on both sides. The other end of the transfer row is overlapped with the main grounding row.

[0006] According to another embodiment of the utility model, it further includes that a disconnector and a circuit breaker of the primary circuit are installed inside the installation plate for the primary circuit, and an operating mechanism is installed outside.

[0007] According to another embodiment of the utility model, it further includes that the grounding post is made of red copper.

[0008] According to another embodiment of the utility model, it further includes that the grounding bent row is L-shaped.

[0009] According to another embodiment of the present utility model, it further includes that a through groove is provided on the side of the cable chamber, a cabinet splicing row is connected in the through groove, one end of the cabinet splicing row is connected to the main grounding row of the main grounding system inside the cabinet, and the other end extends out of the cabinet body and is connected to another cabinet.

[0010] The beneficial effects of the present utility model are as follows: This switch cabinet protection grounding structure can be applicable to various switch cabinets and ring main units. The design structure of its grounding method is simple, the operation is convenient, and it is safe and reliable, and it can realize simultaneous grounding protection for multiple cabinets. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0012] Figure 1 is a schematic structural diagram of an exploded view of the present utility model;

[0013] Wherein: 1. Primary circuit mounting plate, 2. Grounding post, 3. Side plate, 4. Grounding bent row, 5. Vertical grounding row, 6. Adapter row, 7. Cabinet splicing row, 8. Main grounding row, 9. Cabinet splicing hole, 10. Grounding row bracket, 11. Partition board, 12. Gas chamber. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present utility model belong to the scope of protection of the present utility model.

[0015] As Figure 1 shown, this structure is mainly applied to the grounding of the gas chamber of gas-insulated switchgear. When selecting a grounding bus for high-voltage switchgear, not only the magnitude of the equipment current needs to be considered, but also the rated short-time withstand current needs to be considered. According to the national standard regulations, the cross-sectional area of the grounding conductor required for a short-time withstand current of 25 kA / 4S shall not be less than 260 mm2 / . If it is lower than this value, there will be certain risks.

[0016] The figure includes a gas chamber 12. The gas chamber 12 includes a mechanism chamber and a cable chamber below the mechanism chamber. A partition board 11 is provided between the mechanism chamber and the cable chamber. A primary circuit mounting plate 1 is installed on the inner wall of the mechanism chamber. A grounding post 2 is provided below the right side of the primary circuit mounting plate 1, and the primary circuit mounting plate 1 is also connected to the main grounding system.

[0017] The main grounding system includes a grounding bent row 4. One end of the grounding bent row 4 is installed on the end face of the grounding column 2, and the other end of the grounding bent row 4 is connected to a vertical grounding row 5. The vertical grounding row 5 longitudinally penetrates through the partition 11 and extends to the bottom of the cable chamber. A transfer row 6 is provided at the bottom of the cable chamber. The vertical grounding row 5 overlaps with one end of the transfer row 6. Side plates 3 are provided on both sides of the cable chamber, and grounding row brackets 10 are provided on the two side plates 3. A main grounding row 8 is horizontally arranged in the cable chamber, and both ends of the main grounding row 8 are connected to the grounding row brackets 10 on both sides. The other end of the transfer row 6 overlaps with the main grounding row 8.

[0018] The isolating switch and circuit breaker of the primary circuit are installed inside the primary circuit mounting plate 1, and the operating mechanism is installed outside.

[0019] The grounding column 2 is made of red copper, and the red copper material can ensure good grounding performance.

[0020] In order to better facilitate the connection with the grounding column 2 and the vertical grounding row 5, the grounding bent row 4 is set in an L shape.

[0021] A through groove is provided on the side of the cable chamber, and a cabinet splicing row 7 is connected in the through groove. One end of the cabinet splicing row 7 is connected to the main grounding row 8 of the main grounding system inside the cabinet, and the other end extends out of the cabinet and is connected to another cabinet. Through the setting of the cabinet splicing row 7, the grounding performance of multiple cabinets can be achieved by one main grounding system. Embodiment

[0022] The primary circuit mounting plate 1 is a large rectangular aluminum plate installed in front of the gas chamber 12. The isolating switch and circuit breaker of the primary circuit are installed inside the primary circuit mounting plate 1, and the operating mechanism is installed outside. When the isolating mechanism operates to the grounded position, the primary circuit needs to be reliably grounded. At this time, the primary circuit mounting plate 1 is connected to the internal switch. It is only necessary to connect the primary circuit mounting plate 1 to the main grounding system. The grounding post 2 is installed at the lower right side of the primary circuit mounting plate 1. The compartment where the primary circuit mounting plate 1 is located is the mechanism compartment, and the cable compartment is below the mechanism compartment. The two compartments are separated by a partition 11. Side plates 3 are installed on both sides of the cable compartment. The grounding bent row 4 is L-shaped. One end is installed on the end face of the grounding post 2, and the other end of the grounding bent row 4 is installed with a vertical grounding row 5. The vertical grounding row 5 longitudinally passes through the partition 11 and extends to the bottom of the cable compartment, and the bottom is lapped with the transfer row 6. The lapping row 6 is installed from back to front. Grounding row brackets 10 are installed in the front lower part of the side plate 3. There are two grounding row brackets 10, which are installed symmetrically left and right. The main grounding row 8 horizontally passes through the bottom of the cabinet body and is installed together with the grounding row brackets 10 on both sides at both ends. The front end of the transfer row 6 is lapped with the main grounding row 8. The main grounding row 8 horizontally passes through the cabinet body, and neither side exceeds. One end of the cabinet splicing row 7 is connected to the main grounding row 8 inside the cabinet, and the other end extends outside the cabinet body and can be connected to another cabinet. A connection of the grounding circuit is formed in the whole system. When a system insulation breakdown fault occurs, the live body can be protected and grounded to prevent personal injury.

[0023] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A switch cabinet protective grounding structure, comprising an air chamber (12), wherein the air chamber (12) comprises a mechanism chamber and a cable chamber below the mechanism chamber, and a partition (11) is provided between the mechanism chamber and the cable chamber, wherein: A primary circuit installation plate (1) is installed on the inner wall of the mechanism room, a grounding column (2) is provided at the lower right side of the primary circuit installation plate (1), and the primary circuit installation plate (1) is also connected to a main grounding system.

2. A switch cabinet protective grounding structure according to claim 1, characterized in that: The main grounding system comprises a grounding bend (4), one end of which is mounted on the end surface of a grounding column (2), the other end of which is connected to a vertical grounding bar (5), the vertical grounding bar (5) longitudinally passes through a partition (11) and extends to the bottom of a cable chamber, a transfer bar (6) is provided at the bottom of the cable chamber, the vertical grounding bar (5) is overlapped with one end of the transfer bar (6), side panels (3) are provided on both sides of the cable chamber, grounding bar brackets (10) are provided on the side panels (3) on both sides, a main grounding bar (8) is transversely provided in the cable chamber, both ends of the main grounding bar (8) are connected to the grounding bar brackets (10) on both sides, and the other end of the transfer bar (6) is overlapped with the main grounding bar (8).

3. A switch cabinet protective grounding structure according to claim 1, characterized in that: The primary circuit installation plate (1) has an isolating switch and a circuit breaker for the primary circuit installed inside and an operating mechanism installed outside.

4. A switch cabinet protective grounding structure according to claim 1, characterized in that: The material of the grounding column (2) is copper.

5. A switch cabinet protective grounding structure according to claim 2, characterized in that: The grounding bend row (4) is L-shaped.

6. A switch cabinet protective grounding structure according to claim 1, characterized in that: A through slot is provided on the side of the cable room, and a cabinet row (7) is connected in the through slot. One end of the cabinet row (7) is connected to a main grounding bar (8) of a main grounding system in the cabinet, and the other end extends out of the cabinet body to be connected to another cabinet.

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