CN204068136U - Solid insulated transfer busbars and gas insulated switchgear - Google Patents

Abstract

The utility model provides a solid insulation transfer busbar (2), which has an internal conductor (24), including an outlet terminal (21), used for connecting with a cabinet body or a casing on a solid body; and a cable connection terminal (23 , 25) and used for connecting with cables or other outlets; the outside of the solid insulation transfer busbar (2) is wrapped by layers of solid insulation material (22). Its main function is to convert the front, middle and rear phase sequence ABC of the main bus in the Y-axis direction to the left-middle-right phase sequence on the feeder side in the X-axis direction, and this conversion is performed outside the gas chamber of the gas insulated switchgear. The purpose is to reduce the insulation risk in the gas chamber of the switchgear and improve the safety and reliability of the gas insulated switchgear.

Description

Solid insulated transfer busbars and gas insulated switchgear

technical field

The utility model belongs to the technical field of electric power products, in particular to a solid insulated transfer bus applied to gas insulated switchgear

Background technique

The phase sequence of gas insulated switchgear is generally specified as front, middle, rear and left, middle, and right, that is, the phase sequence of front, middle, and rear is generally on the side of the main busbar, and the phase sequence is left, middle, and right on the side of the feeder. installation.

At present, most gas-insulated switchgears are converted from the front, middle, and rear phase sequences to the left, middle, and right phase sequences in the gas chamber. In this way, the insulation conditions in different directions need to be considered in the gas chamber, which is prone to insulation problems and reduces the safety of the switchgear. and reliability, increasing the difficulty of switchgear design.

As a new type of busbar, solid insulated transfer busbar has been commonly used in gas insulated switchgear. The solid insulated transfer bus is electrically insulated by epoxy resin, silicone rubber, etc., which makes it require a very small space, easy to arrange, and easy to replace, while reducing the insulation risk of gas insulated switchgear.

The utility model analyzes the layout of most of the gas insulated switch cabinets, and at the same time through some tests and simulations, designs a solid insulated transfer bus that converts the front, middle and rear phase sequence of the main bus side into the left, middle and right phase sequence. Through this The solid-insulated transfer bus realizes the above-mentioned commutation outside the gas chamber, reduces the insulation risk of the gas-insulated switchgear, and enhances the operation safety and reliability of the gas-insulated switchgear.

Utility model content

One aspect of the utility model provides a solid insulated transfer busbar, the inside of which is a metal conductor, including an outlet end for connecting with a casing or a solid body; and a cable connection end for connecting with cables or other outlets Connection; the exterior of the solid insulation transfer busbar is wrapped by layers of solid insulation material.

According to the best embodiment of the present utility model, the outlet end has an inner cone structure or an outer cone structure.

According to the best embodiment of the utility model, the cable connection end has an inner cone structure or an outer cone structure.

According to a preferred embodiment of the present invention, the solid insulating material layer adopts soft insulating material or hard insulating material. Layers of solid insulating material are silicone rubber, epoxy, or nylon.

According to a preferred embodiment of the present invention, the solid insulated transfer bus includes two or three, which are respectively used for two-phase or three-phase gas insulated switchgear. The solid insulation transfer busbar also includes a support plate.

According to a preferred embodiment of the present invention, the solid insulated transfer bus further includes a flange for enhancing the insulation reliability of the solid insulated transfer bus. Solid insulated transfer busbars have a grounded shield.

According to a preferred embodiment of the present invention, the solid insulating material layer includes a soft insulating material layer and a hard insulating material layer.

According to a preferred embodiment of the present invention, when there are three solid insulated transfer bus bars, the outlet ends of the three solid insulated transfer bus bars are arranged in parallel or triangular shape. When there are three solid insulated transfer busbars, the cable connection ends of the three body insulated transfer busbars are arranged in a parallel or triangular shape.

According to a preferred embodiment of the present utility model, the solid insulated transfer bus further includes an installation part, which is integrated with the solid insulated transfer bus. Also included is an air chamber connection end with an outer tapered structure.

Another aspect of the present utility model provides a gas insulated switchgear, including the solid insulated transfer busbar as described in any one of the preceding items.

Description of drawings

Figure 1 is a schematic diagram of the position of the solid insulation transfer busbar;

Fig. 2 is the first best embodiment and layout of the solid insulated transfer busbar;

Fig. 3 is the second best embodiment and layout of the solid insulated transfer busbar;

Fig. 4 is the third best embodiment and arrangement of the solid insulated transfer bus bar;

Fig. 5 is the fourth best embodiment and arrangement of the solid insulated transfer bus bar;

Fig. 6 is the fifth preferred embodiment and arrangement of the solid insulated transfer busbar.

Detailed ways

Hereinafter, with reference to the accompanying drawings, a specific description of alternative embodiments of the present invention is given.

As shown in Figure 1, the XYZ three coordinate axes stipulate that the direction of the X axis is the width direction of the gas insulated switchgear 1, and also the direction of the main bus 11, the direction of the Y axis is the direction of the depth of the gas insulated switchgear 1, and the direction of the Z axis is the direction of the gas insulated switchgear. The height direction of the switchgear. The function of the solid insulated transfer busbar 2 of the present invention is to convert the phase sequence ABC on the main busbar 11 side into the phase sequence ABC on the feeder 12 side outside the gas chamber 10 of the gas insulated switchgear 1 .

As shown in FIG. 2 , the first preferred embodiment of the solid insulated transfer bus 2 , the solid insulated transfer bus 2 has a metal conductor 24 inside and is wrapped by layers 22 of solid insulating material. The solid insulated transfer busbar includes a cable connection end 23 and an outlet end 21; the outlet end 21 is used to connect with the casing on the cabinet body or a solid body, and the cable connection end 23 is used to connect with a cable or other outlet wires; the cable connection end 23 and the outlet wire The end 21 can be an inner cone structure or an outer cone structure. The layer 22 of solid insulating material can be soft insulating material such as silicon rubber, or hard insulating material such as epoxy resin or nylon.

For the three-phase gas insulated switchgear, the solid insulation transfer busbar 2 is composed of three solid insulation transfer busbars, the three solid insulation transfer busbars are metal conductors 24 inside, and the outside is wrapped by layers of solid insulating material 22; The transfer busbar 2 can also be made of three metal conductors 24 through a layer 22 of solid insulating material to be integrated. The solid insulated transfer busbar 2 may also have a ground shield 20 . The outlet end 21 of the air chamber 10 of the solid insulated transfer busbar 2 is connected with the cabinet body or the bushing on the solid body, which is an inner cone structure. The cable connection end 23 of the solid insulation transfer busbar 2 is connected with cables or other outgoing lines, and has an outer cone structure.

The solid insulation transfer busbar 2 and the cable connection end 23 can be arranged in a triangular arrangement such as three holes on the triangular support plate 3, or in a simple straight line arrangement as shown in FIG. 3 in the second preferred embodiment.

For single-phase or two-phase gas insulated switchgear, one or two solid insulation transfer busbars 2 are required. At this time, the support plate can be a triangular support plate 3 , or a support plate of other shapes, such as an ellipse, with a corresponding number of holes.

As shown in FIG. 4, the third preferred embodiment of the solid insulated transfer bus bar 2 has all the features of the first preferred embodiment except the flange 26 and the outer cone structure 25 of the cable or outlet connection end. The flange 26 is the fixed support plate position of the solid insulation transfer bus 2 , which enhances the insulation reliability of the solid insulation transfer bus 2 .

As shown in Figure 5, the fourth preferred embodiment of the solid insulated transfer busbar 2 has the features of its first preferred embodiment, the solid insulating material layer 22 comprises a composite solid insulating layer of different insulating materials, including a hard insulating material layer 221 and soft insulating material layer 222.

As shown in Figure 6, the fifth preferred embodiment of the solid insulated transfer bus bar 2 has all the features of the first preferred embodiment except the connection end 21 of the air chamber, and at the same time has a direct connection with the air chamber as a solid An integral installation part 27 of the insulating transfer busbar. Different from the first preferred embodiment of the solid insulated transfer busbar 2, its fifth preferred embodiment has an air chamber connection end 28 with an outer cone structure.

The solid insulated transfer busbar 2 of the above embodiments of the present invention reduces the insulation risk in the gas chamber of the switchgear and improves the safety and reliability of the gas insulated switchgear.

Although the preferred embodiment of the utility model and accompanying drawings are disclosed for the purpose of illustration, those skilled in the art can make various replacements, Variations and retouching. Therefore, the utility model should not be limited to the content disclosed in the preferred embodiments and drawings, and the scope of protection of the utility model should be defined by the appended claims.

Claims (15)

1. A solid insulation transfer busbar (2), the inside of which is a metal conductor (24), is characterized in that: it includes an outlet end (21), which is used to connect with a casing or a solid body; and a cable connection end ( 23, 25) and used to connect with cables or other outlets; the outside of the solid insulation transfer busbar (2) is wrapped by layers of solid insulation material (22). 2. The solid insulated transfer busbar according to claim 1, characterized in that: the outlet end (21) is an inner cone structure or an outer cone structure. 3. The solid insulated transfer bus according to claim 1, characterized in that: the cable connection end (23) has an inner cone structure or an outer cone structure. 4. The transfer bus bar with solid insulation according to claim 1, characterized in that: the solid insulation material layer (22) is made of soft insulation material or hard insulation material. 5. The solid insulated transfer busbar according to claim 4, characterized in that: the layers (22) of solid insulating material are silicone rubber, epoxy resin or nylon. 6. The solid insulated transfer bus according to any one of claims 1-5, characterized in that: the solid insulated transfer bus comprises two or three, which are respectively used for two-phase or three-phase gas insulated switchgear. 7. The solid insulated transfer bus according to claim 6, characterized in that: the solid insulated transfer bus further comprises a support plate (3). 8. The solid insulated transfer busbar according to any one of claims 1-5, characterized in that: the solid insulated transfer busbar (2) also includes a flange (26) for strengthening the solid insulated transfer busbar (2) ) insulation reliability. 9. The solid insulated transfer bus according to any one of claims 1-5, characterized in that: the solid insulated transfer bus (2) has a ground shielding layer (20). 10. The solid insulated transfer bus according to any one of claims 1-3, characterized in that the solid insulating material layer (22) comprises a soft insulating material layer (222) and a hard insulating material layer (221). 11. The solid insulated transfer bus according to claim 6, characterized in that: when there are three solid insulated transfer buses, the outlet ends (21) of the three solid insulated transfer buses are arranged in parallel or in a triangle. 12. The solid insulated transfer busbar according to claim 6, characterized in that: when there are three solid insulated transfer busbars, the cable connection ends (23) of the three solid insulated transfer busbars are arranged in parallel or triangular shape. 13. The solid insulated transfer busbar according to any one of claims 1-3, characterized in that it further comprises a mounting part (27), which is integrated with the solid insulated transfer busbar. 14. The solid insulated transfer bus according to claim 10, characterized in that it further comprises an air chamber connection end (28) with an outer cone structure. 15. A gas insulated switchgear, characterized in that it comprises the solid insulated transfer busbar (2) according to any one of claims 1-14.