CN207896532U - A kind of mounting structure of metal-clad moveable high-voltage switchgear current transformer - Google Patents

Abstract

The utility model provides a kind of mounting structure of metal-clad moveable high-voltage switchgear current transformer, including the bus-bar room and current transformer being located in switchgear, the current transformer is lifted on the bottom of the bus-bar room, one terminals of the current transformer are connected to mouth under the breaker in the switchgear by busbar, and another terminals are connected with the busbar extended to outside the switchgear cabinet top.Busbar length needed for the utility model connection current transformer integrally shortens, and reduces cost, and do not interfere with performance and the safety of switchgear.

Description

An installation structure of a metal-clad removable high-voltage switchgear current transformer

technical field

The utility model relates to a high-voltage switch cabinet, in particular to an installation structure of a metal armored removable current transformer of a high-voltage switch cabinet.

Background technique

At present, in the power system, the high-voltage switchgear mostly adopts metal armored removable high-voltage switchgear with vacuum circuit breakers. The metal armored removable high-voltage switchgear includes a busbar room and a circuit breaker room equipped with a vacuum circuit breaker. The lower opening of the vacuum circuit breaker passes through the partition from the side and extends into the cable chamber below the busbar chamber.

In the power distribution system, the busbar is extended from the cable room to the outside of the switchgear cabinet through overhead incoming lines. The current transformer (CT) is now installed on the column behind the cabinet. One terminal of the current transformer is connected to the lower port of the circuit breaker through the busbar, and the other terminal is connected to the busbar extending to the outside of the cabinet top. However, this installation method will use more busbars, and the production cost is higher.

Utility model content

The utility model provides an installation structure of a metal armored removable high-voltage switch cabinet current transformer which can save busbars, reduce costs and ensure that the performance and safety of the switch cabinet do not change.

In order to achieve the above object, the technical scheme that the utility model takes is:

The installation structure of the metal armored removable high-voltage switchgear current transformer includes a busbar room and a current transformer arranged in the switchgear, the current transformer is hoisted at the bottom of the busbar room, and the current One terminal of the transformer is connected to the lower opening of the circuit breaker in the switch cabinet through a bus bar, and the other terminal is connected to a bus bar extending outside the top of the switch cabinet.

The bus bar extending to the outside of the switchgear cabinet includes a vertical section parallel to the outdoor side of the busbar, a horizontal section parallel to the bottom surface of the busbar chamber and a bent part connecting the two.

It also includes an insulator vertically installed on the outdoor side of the busbar, and the vertical section is vertically connected with the insulator.

The terminal of the current transformer is at the same height as the lower opening of the circuit breaker.

By adopting the above technical scheme, the distance from the terminal of the improved current transformer to the lower opening of the circuit breaker is shortened, and the length of the busbar extending to the outside of the top of the switch cabinet is taken into account. This structure connects the busbar required by the current transformer. The overall length is shortened, which reduces the cost without affecting the performance and safety of the switchgear.

The busbars extending to the outside of the top of the switchgear contain sections parallel to the sides and bottom of the busbar compartment, respectively. In this way, the length of the busbar can be minimized while maintaining the distance between the busbar and the busbar room, and the height of the terminal of the current transformer is consistent with that of the lower opening of the circuit breaker, and the length of the busbar connecting the two can also be minimized. The busbar extending to the outside of the switchgear cabinet is long and needs to be bent. Therefore, it is supported and positioned by the insulator installed outside the busbar room to improve the stability of the busbar for overhead incoming lines.

Description of drawings

Fig. 1 is the structural representation of the utility model.

The markings in the figure are:

1. Busbar room, 2. Circuit breaker room, 3. Lower port of circuit breaker, 4. Current transformer, 5. Large bent plate in busbar room, 6. Insulator, 7. Busbar.

Detailed ways

The specific implementation of the utility model will be described in further detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concepts and technical solutions of the utility model.

The high-voltage switchgear has a busbar room 1, a circuit breaker room 2 and a cable room. The busbar room 1 is a space separated by the large curved plate 5 of the busbar room, the partition and the cabinet top plate. Outside the busbar room 1 is a cable room for incoming lines. In the prior art, the current transformer 4 is installed on the column behind the cabinet, and is also located in the cable room.

As shown in Fig. 1, the utility model provides an installation structure of a metal-clad removable high-voltage switchgear current transformer, including a busbar room 1 and a current transformer 4 in the switchgear. The current transformer 4 is hoisted on the bottom of the large curved plate 5 in the bus room, and the terminal of the current transformer 4 faces downward. One terminal of the current transformer 4 is connected to the lower port 3 of the circuit breaker in the switch cabinet through the bus bar 7 , and the other terminal is connected to the bus bar 7 extending outside the top of the switch cabinet.

The busbar 7 extending to the outside of the switchgear cabinet includes a vertical section parallel to the outer side of the busbar chamber 1, a horizontal section parallel to the bottom surface of the busbar chamber 1, and a bent part. The bent part connects the horizontal section and the bent part. An insulator 6 is installed vertically on the outer surface of the large curved plate 5 in the busbar room. There are at least two insulators 6 . All insulators 6 are of equal length and are connected perpendicularly to said vertical section. In this way, the length of the busbar 7 extending to the outside of the switchgear cabinet can be ordered to be the shortest on the premise of maintaining the distance between the busbar 7 and the large curved plate 5 of the busbar room.

After the improvement, the distance from the terminal of the current transformer 4 to the lower port 3 of the circuit breaker is shortened. Because the current transformer 4 is located between the bus bar 7 entering from the top of the switch cabinet and the lower port 3 of the circuit breaker, after taking into account the bus bar 7 extending to the outside of the switch cabinet top, the bus bar connected to the current transformer 4 7 The overall length is also shortened. This structure reduces the cost of the required busbar 7 without affecting the performance and safety of the switchgear.

As a further improvement, the height of the terminal of the current transformer 4 and the lower port 3 of the circuit breaker can be consistent. In this way, the distance from the terminal to the lower port 3 of the circuit breaker is the shortest, which can further reduce the length of the busbar 7 connecting the two.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned method, as long as various insubstantial improvements are adopted in the concept of the utility model and technical solutions, or there is no Directly applying the ideas and technical solutions of the utility model to other occasions through improvement is within the protection scope of the utility model.

Claims (4)

1. An installation structure of a metal armored removable high-voltage switchgear current transformer, comprising a busbar compartment and a current transformer located in the switchgear, a terminal of the current transformer is connected to the switch by a busbar The lower port of the circuit breaker in the cabinet is connected to the bus bar extending to the outside of the top of the switch cabinet, and the other terminal is connected, and the feature is that the current transformer is hoisted at the bottom of the bus bar room. 2. The installation structure of a metal armored removable high-voltage switchgear current transformer according to claim 1, characterized in that: the busbar extending to the outside of the switchgear cabinet includes a busbar parallel to the outside of the busbar. The vertical section of the side, the horizontal section parallel to the bottom surface of the busbar chamber and the bending part connecting the two. 3. The installation structure of a metal-armored removable high-voltage switchgear current transformer according to claim 2, characterized in that: it also includes an insulator vertically installed on the outdoor side of the busbar, and the vertical section is connected to the The insulators are connected vertically. 4. The installation structure of a metal-clad removable high-voltage switchgear current transformer according to claim 1, characterized in that: the terminal of the current transformer is at the same height as the lower opening of the circuit breaker.