CN1006111B

CN1006111B - Disconnecting switch for gas-insulated switchgear

Info

Publication number: CN1006111B
Application number: CN85105180.4A
Authority: CN
Inventors: 高桂; 竹内博; 羽马泽之
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 1985-06-29
Filing date: 1985-06-29
Publication date: 1989-12-13
Also published as: CN85105180A

Abstract

The present invention relates to an isolating switch for a three-phase intermittent gas insulated switch device. Current paths are mutually and vertically arrayed. The present invention is characterized in that an electrode on the movable side of a middle phase is fixed to a metal part which is arranged on a three-phase intermittent insulating spacer, and electrodes on the movable side of end phases are fixed to the insulating spacer and are arranged on the inner wall of a container which is provided with a main isolating switch body.

Description

Disconnecting switch for gas-insulated switchgear

The present invention relates to a kind of three-phase case type disconnecting switch for gas-insulated switchgear altogether that is used for.

Because gas-insulated switchgear device air insulation switching device than traditional aspect erection space and volume is little, therefore be widely used in many facilities, original, all gas insulated switch all is single-phase sealing (enclosure) formula.Thereafter, the someone has imagined a kind of gas-insulated switchgear device that has only the bus wire portion branch to arrange according to the common case type system of three-phase, and recently, having developed a kind of is three-phase case type gas-insulated switchgear device altogether fully.

The three-phase completely that can provide at present altogether the case type gas-insulated switchgear device applicable to 204 kilovolts rated voltage, but, can estimate, fork-like farm tool used in ancient China is total to the case type gas-insulated switchgear device to three-phase be improved, can make it to become the switching device of ultra high voltage or superhigh pressure.

Fig. 1 and Fig. 2 have shown the three-phase internal structure of the tradition cut-out switch of case type gas-insulated switchgear device altogether.In this switching device, each current path is orthogonal arranges, and Fig. 2 is the cutaway view of the II-II line along Fig. 1.As shown in the figure, in each phase, metal parts 3 is installed on the taper insulating barrier 2, and this insulating barrier is vertically placed.In a mobilizable side, in put current-collector radome 8 be fixed by bolts on the metal parts 3 by conductor 4.

In addition, be positioned at the radome 9 of fixing a side and be fixed on firmly on the metal parts 3 that is contained on the insulating barrier 2, this insulating barrier 2 is

horizontal positioned.Radome

8 and 9 mutually between fully insulation.

One insulating bar 6 cooperates with the end points of a mobilizable contactor 5, is driven by a connecting rod 7 thereby make the latter pass through operating means (not expressing fork-like farm tool used in ancient China).In Fig. 1, reference number 1 is one the container of above-mentioned each assembly to be housed, container 1 ground connection.Be full of such as SF＜` in the container 1; ; 6`〉and so on insulating gas.

When this cuts off switching manipulation, because current-collector and the frictional force between mobilizable contactor 5 of 8 li of each radomes of a movable side and the weight of radome itself will produce a moment of flexure on the insulating barrier of vertically laying 2.In addition, when fault current flows into main circuit, can form one electromagnetic repulsion force, like this, on insulating barrier 2, will be added with a big moment.

Moment of flexure is that the increase of the length of conductor 4 increases with its brachium, therefore, the moment of flexure that each end causes mutually all greater than in the moment of flexure that causes mutually.

The designed insulating barrier that goes out can bear because the stress due to the moment of flexure of the maximum that produces.Yet, be long inevitably owing to be used for respectively holding the conductor 4 of phase, as shown in Figure 2, therefore, key is to adopt firm insulating barrier.

Be called active side radome 8 when below the radome 8(of the mobilizable side of being arranged in of each end phase, quoting in addition) and be positioned at be called fixation side radome 9 when quoting below the radome 9(on the fixing side) far away than the corresponding radome of phase from fixing insulating barrier.Therefore, in the time of making active side radome 8 and fixation side radome 9 coaxial, be easy to depart from dimensionally standard.

As mentioned above, the purpose of this invention is to provide a kind of cut-out switch that is used for gas-insulated switchgear device, this switch can be eliminated many defectives of traditional same device.

The objective of the invention is to reach by following measure, a kind of three-phase cut-out switch of case type gas-insulated switchgear device altogether that is used for promptly is provided, wherein, each current path is orthogonal arranges, and it is characterized in that:

In the trolley pole of a mutually movable side be fixed on one and be installed in three-phase altogether on the metal parts on the case type gas-insulated dividing plate, and

The trolley pole of the mutually movable side of each end is fixed on the insulation spacer block, and the latter is placed on the inwall that the container that cuts off switch main body is housed.

One embodiment of the invention are described with reference to the accompanying drawings.

Fig. 3 is the working of an invention scheme, and Fig. 4 is the cutaway view that IV-the IV line drawing goes out along Fig. 3.In Fig. 3, those assemblies of having mentioned in Fig. 1 all indicate identical reference number, yet, should be noted that the radome 8 of two active side of respectively holding phase all is fixed on the inwall of container firmly by the metal parts in the block insulation spacer block 11.In addition, conductor 4 is electrically connected by the metal parts 3 on an infundibulate contactor 10 and the insulating barrier 2.Equally, as shown in Figure 1, the movable side radome 8 of middle phase links to each other with metal parts 3 on being positioned on insulation spacer 2 with a bolt.

The structure of cut-out switch invention as mentioned above.Therefore, the moment of flexure on the insulating barrier is just limited by middle phase brachium, and promptly the moment of flexure in the traditional cut-out switch of the bending moment ratio on the insulating barrier is much smaller, like this, can adopt the lower insulating barrier of price.

In addition, movable side radome 8 can be aimed at the radome 9 of fixation side at an easy rate, therefore, and the cut-out switch reliability height of making according to the present invention.

Fig. 1 is used for the three-phase tradition cut-out of case type gas-insulated switchgear device altogether

The cutaway view of switch;

Fig. 2 is the cutaway view of the II-II line along Fig. 1;

Fig. 3 is the cutaway view of one embodiment of the present of invention, and

Fig. 4 is the cutaway view of the IV-IV line along Fig. 3.

In these accompanying drawings, identical assembly indicates identical reference number.

The 1-container; The 2-insulating barrier; The 3-metal parts; The 4-conductor;

The mobilizable contactor of 5-; The radome of the movable side of 8-; 11-block insulation spacer block.

Claims

1, a kind of three-phase cut-out switch of case type gas-insulated switchgear device altogether that is used for, wherein, each current path is orthogonal, in the trolley pole of a mutually movable side be fixed on one and be contained in three-phase altogether on the metal parts in the case type insulating barrier, it is characterized in that respectively holding the trolley pole of a movable side of phase to be fixed on the insulation spacer block on the inwall that the container that cuts off switch main body is housed.