JPS5935508A - Gas insulated disconnecting switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in a gas insulated disconnect switch having a vertically downward conductor outlet.

[Technical background of the invention and its problems]

FIG. 1 shows a conventional gas insulated disconnector having a pair of current collectors, the current collectors supported by an insulating spacer, and a disconnector having a vertically downward conductor opening.

In Fig. 1≦2, 1 is a metal container, 2.3 is a movable side and fixed side current collector, 4 is a movable conductor, 5 is an opening/closing mechanism, 6ii
Operating rods 7 and 8J- are conductors, and 9.10 is an insulating spacer.

In a conventional gas insulated disconnect switch, the insulating spacer 9. has the same creepage length regardless of the exit position from which each current collector 2.3 is led out. lO was used.

However, the disconnector C2 may be required to have current switching responsibilities, such as loop current switching and small basket flow switching α-1, in response to circuit connections in a substation or switchyard. If a normal disconnector contact structure is used for a disconnector that is responsible for switching on and off the current, the contact material will melt due to the arc and the arc (2-5F (l gas decomposition products) will occur). It is known that -j, , :6) occurs.

Therefore, if a disconnector with the structure shown in Figure 1 is used as a disconnector responsible for switching current, the above-mentioned products generated due to current switching, etc. will accumulate in the insulating spacer IO at the bottom, and the above-mentioned products [
=, the 1IiPl voltage of the insulating spacer 10 decreases. Therefore, the dielectric strength of the gas insulated disconnector was determined by the withstand voltage of the insulating spacer IO attached to the above-mentioned product. For this reason, the insulating spacer 10 is used by eating up the insulating margin of the insulating spacer 9, which is used under clean conditions where products do not adhere to it, and becomes the weak point in terms of insulation of the entire gas-insulated switchgear. Purpose of the Invention The present invention has been made to eliminate the above-mentioned drawbacks, and aims to improve the insulating spacer of the vertical downward conductor sunrise part. [Summary of the Invention] The present invention provides at least one pair of clusters facing each other inside a metal container filled with an insulating gas. It has a movable connector that arranges electrons and slides between the collectors so that they can be brought into contact and separated.

The current collectors are each configured to be supported by an insulator on the metal container i, and one of the current collectors has an exposed portion connected to other equipment led out in the vertical direction of the metal container, and the other A sunrise part where the current collector is connected to other equipment is led out in the horizontal direction of the metal container, and in each sunrise part, the gas insulated disconnector is configured to partition the gas by an insulator. The gas insulated disconnect switch-2 is characterized in that the creepage length of the gas compartment insulator in the vertical sunrise part is longer than the creepage length of the gas compartment insulator in the horizontal sunrise part. .

[Embodiments of the invention]

FIG. 2 is a sectional view of an example of a gas-insulated introducer to which the present invention is applied. An embodiment of the present invention will be described below with reference to FIG. 2. In Fig. 2, a metal container 1 filled with insulating gas
A movable current collector 2 and a fixed current collector 3 are provided inside the movable conductor 4, and a contact is formed with the movable conductor 4, and the contact is opened and closed by a switch 5 and an operating rod 6 connected thereto. Each current collector leads a current path to the outside of the metal container by means of conductors 7 and 8, respectively. At this time, the conductor 7.8 is supported by an insulating spacer 9.10, and the creeping length of the insulating spacer 20 at the vertically downward conductor s is longer than the creeping length of the insulating spacer 9 at other locations. In the embodiment shown in FIG. 2, the diameter -D of the insulating spacer 9 is made larger than the diameter of the other insulating spacers 9 in order to increase the creepage length.

With such a configuration, the above-mentioned products are eliminated due to the switching of the current C1, and most of them fall on the insulating spacer 10 with the vertically downward conductor opening part (-), but the creepage length of the insulating spacer 10 By making f2 longer than the creepage length of the other insulating spacers 9, it is possible to have sufficient dielectric strength even if the withstand voltage of the insulating spacer 10 is lower than the above-mentioned product 22.Thereby, the gas insulation disconnection The dielectric strength of the entire device can also be improved.In addition, the creepage length and diameter D of the insulating spacer can be improved by designing the insulation and edges of the two insulating spacers other than those mentioned above in a static state free of the above-mentioned products.
I.

The height Hl can be made small and the gas insulation disconnect @
- The insulators 6 used in each part can be provided with sufficient tolerance, and skin spots on the insulation can be eliminated.

The present invention can also be implemented as shown in FIGS. 3 and 4.

In FIG. 3, in order to make the creeping length of the insulating spacer 10 longer than the creeping length of the other insulating spacers, the height H of the insulating spacer is set higher than the height of the other insulating spacers.

Figure 4 shows the present invention in which a gas outlet with three conductor outlets is installed.
In the example in which Ur path device≦− is applied, in order to make the creepage length of the insulating spacer 10 longer than the creepage length of other insulating spacers, C2,
The diameter of the insulating spacer is larger than the diameter of other insulating spacers.

〔Effect of the invention〕

As described above, according to the present invention, the creepage length of the gas compartment insulator in the vertical sunrise part is made longer than the creepage length of the horizontal gas compartment insulator. l It is possible to obtain a downsized gas insulated disconnector with a small voltage drop.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional gas insulated disconnector, and FIGS. 2 to 4 are sectional views of a gas insulated disconnector according to the present invention. 1...Metal container 2...Movable 1111 blank electron 3"...Fixed fill current collector 4...Movable conductor 5
...Opening/closing mechanism 6...Operation rod 7, 7a+
7bw 8'''Conductor 9+ 9a+ 9b+ 10...Insulating spacer (73
17) Agent Patent attorney Nori Atsushi Chika (and 1 other person)
Fig. 1 Fig. 2 g D Fig. 3/U Fig. 4

Claims (1)

[Scope of Claims] 1. At least one pair of collectors 1h° are disposed opposite to each other in a metal container filled with a biaxial edge gas, and the collectors are slidable so as to be able to come into contact with and separate from them. It has a movable connector. Each of the current collectors is supported by an insulating material in the metal container C, and one of the current collectors is connected to another device by leading out the sun part in the vertical direction of the metal container, and the other one is connected to the metal container C. The solar power collectors connected to other equipment are connected to two horizontal lines in the metal container (7), and the gas insulated disconnectors are connected to insulators (two gas compartments The gas insulated disconnector 12 configured as above is characterized in that the creepage length of the gas compartment insulator in the vertical sunrise part is longer than the creepage length of the gas compartment insulator in the horizontal sunrise part. gas insulated disconnect switch