A vacuum switch module for nitrogen insulated ring main unit

Abstract

The invention provides a vacuum switch module for a nitrogen insulated ring main unit. The layout and installation of the vacuum switching module in the nitrogen insulated ring main unit are greatly optimized, and a small-sized and compact vacuum switch is provided under the premise of satisfying insulation and temperature rising requirement. The vacuum switch module comprises a vacuum arc extinguish chamber, a metal mounting frame, an insulating supporting plate, a supporting column insulator, a fixed frame and a contact spring system, wherein the insulating supporting plate is horizontally fixed at the upper part of the metal mounting frame; the upper end of the vacuum arc extinguish chamber is perpendicularly fixed on the lower part of the insulating supporting plate while the lower end is fixedly arranged on the fixed frame; the fixed plane of the metal mounting frame and the insulating supporting plate is lower than the upper plane where the vacuum arc extinguish chamber and the insulating supporting plate are fixed; the contact spring system is mounted in the fixed frame and used for connecting a movable contact of the vacuum arc extinguish chamber to supply operating power; and one end of the supporting column insulator is fixed on one side of the metal mounting frame while the other end is fixed on the fixed frame.

Description

technical field

[0001] The invention relates to the technical field of high-voltage electrical equipment, in particular to a vacuum switch module for a nitrogen-insulated ring network cabinet. Background technique

[0002] Nitrogen insulated ring network cabinet compared to traditional SF 6 The gas insulated ring network cabinet is environmentally friendly and is considered to be the future SF 6 Alternatives to ring main units. Since nitrogen or dry air are not as insulating as SF 6 , so the volume of the nitrogen insulated ring main unit is smaller than that of the SF 6 The ring network cabinet is slightly larger. In order to make the volume of the nitrogen insulated ring main unit smaller, it is necessary to design a compact switch, which not only needs to arrange the components and devices reasonably, but also meets the performance requirements such as insulation and temperature rise.

[0003] In the prior art, most nitrogen-insulated or dry-air-insulated ring networ...

Examples

example 1

[0030] Such as figure 1 As shown, a vacuum switch module for a nitrogen insulated ring network cabinet of the present invention adopts a frame structure, three-phase vertical arrangement, the metal mounting frame 2 of the frame structure is used to provide the installation position, and the metal mounting frame 2 is made of a metal material Front plate 21, back plate 22 and beam 23 are welded and formed.

[0031] Such as figure 2 , a vacuum switch module for nitrogen insulated ring main unit comprising: a vacuum interrupter 1, a metal mounting frame 2, an insulating support plate 3, a post insulator 4, a composite shielding cover 5, a fixing frame 6, and a contact spring system 7. Vacuum interrupter 1 can be selected as circuit breaker interrupter or load switch interrupter according to needs, suspended and fixed between the insulating support plate 3 and the fixed frame 6, and the insulating support plate 3 bears the gravity and closing of the hoisting vacuum interrupter w...

example 2

[0041] In this instance, if Figure 5 As mentioned above, the insulating support plate 3 is preferably an arched structure with only one side supported, that is, a single-sided arched structure; the height of the metal mounting frame 2 can be reduced under the premise of meeting the insulation requirements, and the vacuum switch module can be reduced At the same time, its unilateral arched structure can disperse stress downwards and outwards, making the insulating support plate 3 stronger when bearing the closing impact force. All the other structures are identical to Example 1.

technical field

[0001] The invention relates to the technical field of high-voltage electrical equipment, in particular to a vacuum switch module for a nitrogen-insulated ring network cabinet. Background technique

[0002] Nitrogen insulated ring network cabinet compared to traditional SF 6 The gas insulated ring network cabinet is environmentally friendly and is considered to be the future SF 6 Alternatives to ring main units. Since nitrogen or dry air are not as insulating as SF 6 , so the volume of the nitrogen insulated ring main unit is smaller than that of the SF 6 The ring network cabinet is slightly larger. In order to make the volume of the nitrogen insulated ring main unit smaller, it is necessary to design a compact switch, which not only needs to arrange the components and devices reasonably, but also meets the performance requirements such as insulation and temperature rise.

[0003] In the prior art, most nitrogen-insulated or dry-air-insulated ring networ...

Examples

example 1

[0030] Such as figure 1 As shown, a vacuum switch module for a nitrogen insulated ring network cabinet of the present invention adopts a frame structure, three-phase vertical arrangement, the metal mounting frame 2 of the frame structure is used to provide the installation position, and the metal mounting frame 2 is made of a metal material Front plate 21, back plate 22 and beam 23 are welded and formed.

[0031] Such as figure 2 , a vacuum switch module for nitrogen insulated ring main unit comprising: a vacuum interrupter 1, a metal mounting frame 2, an insulating support plate 3, a post insulator 4, a composite shielding cover 5, a fixing frame 6, and a contact spring system 7. Vacuum interrupter 1 can be selected as circuit breaker interrupter or load switch interrupter according to needs, suspended and fixed between the insulating support plate 3 and the fixed frame 6, and the insulating support plate 3 bears the gravity and closing of the hoisting vacuum interrupter w...

example 2

[0041] In this instance, if Figure 5 As mentioned above, the insulating support plate 3 is preferably an arched structure with only one side supported, that is, a single-sided arched structure; the height of the metal mounting frame 2 can be reduced under the premise of meeting the insulation requirements, and the vacuum switch module can be reduced At the same time, its unilateral arched structure can disperse stress downwards and outwards, making the insulating support plate 3 stronger when bearing the closing impact force. All the other structures are identical to Example 1.

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