Installation structure of current transformer of gas insulation switch cabinet

Abstract

The utility model discloses a mounting structure of a current transformer of a gas insulation switch cabinet, which comprises a cabinet body, a gas chamber partition plate is arranged in the cabinet body, a current transformer is arranged on one side of the gas chamber partition plate, and a connecting plate is fixed on the other end face of the gas chamber partition plate. The current transformer and the connecting plate are fixed on the air chamber partition plate through fasteners, a static contact is fixed at the other end of the current transformer, an upper copper bar and a lower copper bar are arranged in the cabinet body, plum blossom contacts are fixed at one end of the upper copper bar and one end of the lower copper bar, the plum blossom contacts are connected with the static contact in a sleeved mode, and the plum blossom contacts are connected with the static contact in a sleeved mode. According to the utility model, the current transformer is moved to the inner side of the air chamber partition plate, meanwhile, the static contact fixed on the current transformer can be quickly plugged with the tulip contact on the copper bar, finally, the current transformer and the connecting plate are fixed on the air chamber partition plate through the fastener, and the air chamber partition plate is sealed by adopting the three-way one-C sealing ring; the installation of the current transformer is completed, and the installation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of switch cabinets, in particular to an installation structure of a current transformer of a gas-insulated switch cabinet. Background Technique

[0002] As Figure 1 shown, the current transformers of existing switch cabinets are generally connected by fasteners. The copper busbar and the current transformer are connected together by fasteners. Moreover, due to the small internal structure of the switch cabinet and the large weight of the current transformer, the current transformer needs to be connected to the copper busbar while being installed and fixed, making the installation of the current transformer difficult.

[0003] The existing current transformer is installed inside the circuit breaker gas chamber. When replacing the current transformer on site, it is necessary to first pull out the circuit breaker from the switch cabinet, remove the copper busbar connected to the current transformer, and then replace the current transformer. The on-site working procedures are complex, the workload is large, and the maintenance time is about 4.5 hours, seriously affecting the on-site work efficiency. Therefore, an installation structure of the current transformer of the switch cabinet is designed, which improves the installation and maintenance efficiency of the current transformer. Content of the Utility Model

[0004] The purpose of the utility model is to provide an installation structure of a current transformer of a gas-insulated switch cabinet. By first moving the current transformer to the inner side of the gas chamber partition, and then fixing the current transformer and the connecting plate on the gas chamber partition through fasteners, and sealing the connecting plate and the gas chamber partition with a sealing ring, the fixation of the current transformer is realized. At the same time, the static contact of the current transformer can be quickly connected with the plum blossom contact on the copper busbar, so as to realize the circuit connection between the current transformer and the copper busbar, improve the installation and disassembly efficiency of the current transformer, further shorten the maintenance time of the current transformer, and greatly improve the maintenance efficiency.

[0005] The utility model provides the following technical solution: an installation structure of a current transformer of a gas-insulated switch cabinet, including a cabinet body. A gas chamber partition is arranged inside the cabinet body. A current transformer is arranged on one side of the gas chamber partition. A connecting plate is fixed on the other end surface of the gas chamber partition. The current transformer and the connecting plate are fixed on the gas chamber partition through fasteners. A static contact is fixed on the other end of the current transformer. An upper copper busbar and a lower copper busbar are arranged inside the cabinet body. Plum blossom contacts are fixed on one ends of the upper copper busbar and the lower copper busbar respectively. The plum blossom contact is sleeved with the static contact.

[0006] A lightning arrester and a tubular busbar are installed on the top surface of the inner wall of the cabinet body. The lower ends of the lightning arrester and the tubular busbar are both connected to the upper copper busbar. By using the connection between the upper copper busbar and the lightning arrester and the tubular busbar, the insulation performance of the cabinet body is improved.

[0007] A circuit breaker and a three-position main knife switch are also fixed inside the cabinet. The lower terminal of the circuit breaker and the three-position main knife switch are connected through a wall bushing. The circuit breaker is connected to the current transformer through a lower copper bar, improving the insulation performance of the circuit breaker and the three-position main knife switch.

[0008] The cabinet also includes two gas chambers. A bushing is fixed inside the gas chamber. One end of the bushing is connected to a bus bar. Both the circuit breaker and the three-position main knife switch are connected to the bus bar. By rotating the knife switch clockwise or counterclockwise, the connection or disconnection between the circuit breaker and the three-position main knife switch and the bus bar is controlled, thereby controlling different working states of the switch cabinet.

[0009] An inner tapered sleeve is sleeved on the lower end of the tubular bus bar. The lower end of the tubular bus bar is connected to the copper bar inside the switch cabinet through the inner tapered sleeve. The upper end of the tubular bus bar is located above the cabinet. By inserting the tubular bus bar into the inner tapered sleeve, the installation of the tubular bus bar is completed, and the tubular bus bar is installed on the cabinet.

[0010] The cabinet also includes a lower cabinet, which is located at the lower end of the gas chamber.

[0011] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:

[0012] (1) By first moving the current transformer to the inner side of the gas chamber partition and then fixing the current transformer and the connecting plate to the gas chamber partition through fasteners, the fixation of the current transformer is realized. At the same time, the static contact of the current transformer can be quickly connected to the plum blossom contact on the copper bar, thereby realizing the connection between the current transformer and the copper bar, improving the installation efficiency of the current transformer.

[0013] (2) During maintenance, it is no longer necessary to disassemble and assemble the circuit breaker. The current transformer can be replaced independently. After deflating the gas chamber, the current transformer can be directly withdrawn, greatly improving the maintenance efficiency and shortening the maintenance time to within 2.5 hours. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0015] Figure 1 is a schematic diagram of the installation structure of the current transformer of the existing switch cabinet;

[0016] Figure 2 is a schematic diagram of the installation structure of the current transformer of the switch cabinet of the present utility model;

[0017] Figure 3 is a schematic diagram when the current transformer of the present utility model is installed;

[0018] In the figure: 1. Cabinet body; 11. Gas chamber partition; 2. Current transformer; 21. Static contact; 22. Plum blossom contact; 23. Slide rail; 3. Connecting plate; 4. Tubular busbar; 41. Inner taper sleeve; 51. Upper copper bar; 52. Lower copper bar; 6. Lightning arrester; 7. Bushing; 8. Busbar; 9. Three-position main knife head; 10. Lower cabinet body; 101. Circuit breaker; 102. Gas chamber. Specific implementation mode

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0020] Please refer to Figure 2 , the present invention provides a technical solution: an installation structure of a current transformer of a gas-insulated switchgear, including a cabinet body 1, a gas chamber partition 11 is arranged inside the cabinet body 1, a current transformer 2 is arranged on one side of the gas chamber partition 11, a through hole is opened on the gas chamber partition 11 to facilitate the current transformer 2 to move from the through hole to the inner side of the gas chamber partition 11, and when the current transformer 2 moves, auxiliary tools such as a slide rail 23 can be used, such as Figure 3As shown in the figure, the height position of the current transformer 2 is ensured. After installation, auxiliary tools such as the slide rail 23 can be drawn out. A connecting plate 3 is fixed on the other end face of the gas chamber partition 11 through fasteners. The current transformer 2 and the connecting plate 3 are fixed on both sides of the gas chamber partition 11 through fasteners. A static contact 21 is fixed on the other end of the current transformer 2. An upper copper bus 51 and a lower copper bus 52 are arranged in the cabinet body 1. Plum blossom contacts 22 are fixed on one end of both the upper copper bus 51 and the lower copper bus 52. When the current transformer 2 moves into place, the plum blossom contact 22 is sleeved with the static contact 21 to complete the connection of the circuit. To sum up, first, use auxiliary tools such as the slide rail 23 to move the current transformer 2 to the inside of the gas chamber partition 11 to ensure the installation height of the current transformer 2. Through the quick insertion structure of the static contact 21 and the plum blossom contact 22, the current transformer 2 can be quickly connected to the upper copper bus 51 or the lower copper bus 52. Subsequently, the current transformer 2 and the connecting plate 3 are respectively fixed on both sides of the gas chamber partition 11 through fasteners, and a ternary ethylene propylene rubber sealing ring is used for sealing with the gas chamber partition 11 to complete the installation of the current transformer 2, improving the installation efficiency of the current transformer 2. After installation, the auxiliary tools such as the slide rail 23 are drawn out. At the same time, when replacing the current transformer 2 on site in this installation method, the current transformer 2 can be independently disassembled and assembled without pulling out the circuit breaker. After deflating the gas chamber, the current transformer 2 can be directly drawn out from the back of the cabinet, improving the maintenance efficiency of the current transformer 2 and shortening the maintenance time from the previous 4.5 hours to the current 2.5 hours, greatly improving the maintenance efficiency.

[0021] On the inner wall top surface of the cabinet body 1, a lightning arrester 6 and a tubular bus 4 are installed. The lower ends of the lightning arrester 6 and the tubular bus 4 are both connected to the upper copper bus 51. By connecting the lightning arrester 6 and the tubular bus 4 to the upper copper bus 51, the insulation performance of the cabinet body 1 is improved.

[0022] A circuit breaker 101 and a three-position main knife head 9 are also fixed in the cabinet body 1. The circuit breaker 101 and the three-position main knife head 9 are connected through a through-wall bushing. The circuit breaker 101 is connected to the current transformer 2 through the lower copper bus 52, further improving the insulation performance of the circuit breaker 101 and the three-position main knife head 9 and protecting the circuit breaker 101 and the three-position main knife head 9.

[0023] There are also two gas chambers 102 in the cabinet body 1. A bushing 7 is fixed in the gas chamber 102. One end of the bushing 7 is connected to a bus bar 8. The circuit breaker 101 and the three-position main knife head 9 are connected to the bus bar 8. By rotating the three-position main knife head 9 clockwise or counterclockwise, the connection or disconnection between the bus bar 8 and the circuit breaker 101 and the three-position main knife head 9 is controlled, and different working states of the switch cabinet are controlled.

[0024] An inner conical sleeve 41 is sleeved on the lower end of the tubular busbar 4. The lower end of the tubular busbar 4 is connected to the copper bar inside the switch cabinet through the inner conical sleeve 41. The tubular busbar 4 is inserted into the upper end of the cabinet body 1, making the installation of the tubular busbar 4 convenient.

[0025] The cabinet body 1 also includes a lower cabinet body 10, and the lower cabinet body 10 is located at the lower end of the gas chamber 102.

[0026] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An installation structure of a current transformer for a gas-insulated switchgear, including a cabinet body, wherein a gas chamber partition is arranged in the cabinet body, and it is characterized in that: A current transformer is provided on one side of the gas chamber partition board. A connecting plate is fixed on the other end face of the gas chamber partition board. The current transformer and the connecting plate are fixed on the gas chamber partition board by fasteners. A static contact is fixed on the other end of the current transformer. An upper copper busbar and a lower copper busbar are arranged in the cabinet. Plum blossom contacts are fixed on one end of each of the upper copper busbar and the lower copper busbar. The plum blossom contacts are sleeved on the static contacts.

2. The installation structure of the current transformer of a gas-insulated switchgear according to claim 1, characterized in that: A lightning arrester and a tubular busbar are installed on the top surface of the inner wall of the cabinet. The lower ends of the lightning arrester and the tubular busbar are both connected to the upper copper busbar.

3. The installation structure of the current transformer of a gas-insulated switchgear according to claim 1, characterized in that: A circuit breaker and a three-position main knife switch are also fixed in the cabinet. The lower terminal of the circuit breaker and the three-position main knife switch are connected through a wall bushing. The circuit breaker is connected to the current transformer through the lower copper busbar.

4. The installation structure of the current transformer of a gas-insulated switchgear according to claim 3, characterized in that: The cabinet also includes two gas chambers. A bushing is fixed in the gas chamber. One end of the bushing is connected to a busbar. Both the circuit breaker and the three-position main knife switch are connected to the busbar.

5. The installation structure of a current transformer of a gas-insulated switchgear according to claim 2, wherein: An inner taper sleeve is sleeved on the lower end of the tubular busbar. The lower end of the tubular busbar is connected to the copper busbar inside the switch cabinet through the inner taper sleeve. The upper end of the tubular busbar is located above the cabinet.

6. The mounting structure of the current transformer of a gas-insulated switchgear according to claim 1, wherein: The cabinet also includes a lower cabinet, which is located at the lower end of the gas chamber.

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