JPH02174504A - Compressed gas-insulated switchgear - Google Patents

Abstract

PURPOSE:To exchange a fixed side electrode easily in a short time by removing a disconnecting conductor 12 provided to a horizontal conductor 10 in exchanging the fixed side electrode 5 of a line side disconnector 2 and by removing a moving side electrode 11 constituted in an integrated block from the horizontal conductor 10. CONSTITUTION:A moving side electrode 11 is formed into a disconnectable integrated block 12 to a horizontal conductor 10. It is constituted so that a moving side conductor 11 as mentioned above can be removed by removing a disconnectable disconnecting conductor 12 arranged to the horizontal conductor 10. Before a fixed side electrode 5 of a line side disconnector 2 is exchanged, a lid 9 above a line side container 6 is removed and the disconnecting conductor 12 arranged to the horizontal conductor 10 is removed. Then the moving side electrode 11 is removed from the horizontal conductor 10. The exchange of a fixed side electrode 5 can be thereby be facilitated and without cutting off control cables of a line side disconnector 2, a line side earth switch 3, etc., the exchange work of the fixed side electrode 5 can be performed.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides a gas-insulated switchgear in which the structure of a line unit in which a disconnector and a cable cone are housed in a cable head container is improved. It is related to.

(Prior Art) Gas-insulated switchgears have been widely used in recent years as switchgears for high-voltage circuits used in substations.

This gas-insulated switchgear has a busbar, circuit breaker, disconnect switch, and other attached equipment housed in a grounded metal container, which is highly stable, inert, and nonflammable. It is odorless and harmless, and is insulated and maintained with an insulating gas such as SF6 gas, which has a dielectric strength 2 to 3 times that of air, and is used as a switchgear for high voltage circuits.

FIG. 3 is a side view showing the internal arrangement of a typical conventional three-phase box type gas insulated switchgear. That is, the track side container 6
A track unit 1 is configured by housing a track-side disconnector 2, a track-side grounding switch 3, and a cable cone 4 therein. A horizontal conductor 7 is connected between the branches 5a and 6b provided horizontally with respect to the track side container 6 of the vertically arranged line unit 1, and the movable side electrode 8 of the disconnector is connected to this horizontal conductor 7. A fixed electrode 5 is disposed at a position facing the movable electrode 8. Further, the fixed side N pole 5 is connected to a cable cone 4 arranged below the line side container 6 of the line unit 1.

In such a line-side disconnector 2, it becomes necessary to replace the contact point of the fixed-side electrode 5 due to wear caused by switching on and off of a small current or due to long-term use. As for the general method of replacing this fixed side electrode 5, what is the line side disconnector? , control cables such as the track-side earthing switch 3 were disconnected from each operating mechanism, and the track-side container 6 was removed.

(Problem to be solved by the invention) However, in the conventional gas insulated switchgear as described above, each time the fixed side electrode 5 is replaced, the control cables of the line side disconnector 2, line side earthing switch 3, etc. After the replacement work was completed, it was necessary to conduct wiring checks, interlock tests, opening/closing characteristics tests, etc.

In addition, since the track side container 6 is completely removed, the internal equipment is exposed to the outside air for a long time, resulting in a deterioration of the quality of the equipment.Furthermore, debris can enter the container, making dust control extremely difficult. It became.

The present invention was proposed in order to eliminate the above-mentioned drawbacks, and its purpose is to make it possible to replace the fixed side electrode in a short time,
Another object of the present invention is to provide a cass insulation switchgear that improves the quality of the equipment.

[Structure of the Invention] (Means for Solving the Problems) The present invention is characterized in that a line unit container configured by storing a disconnector, a cable cone, and a grounding switch inside is arranged vertically, and horizontal walls are arranged on both sides of the container. A branch part that branches in the direction is formed, both branches are connected by a horizontal conductor, a movable side electrode of a disconnector is disposed on the horizontal conductor, and a fixed side electrode is provided at a position opposite to this movable side electrode. The gas insulated switchgear is characterized in that a detachable conductor is disposed on at least one of the horizontal conductors disposed on both sides of the movable N pole of the disconnector.

(Function) According to the gas insulated switchgear of the present invention, when replacing the fixed side electrode of the line-side disconnector, the detachable conductor provided on the horizontal conductor is removed, and the movable side configured in an integral block shape is removed. By removing the electrode from the horizontal conductor, the fixed electrode can be easily replaced in a short time.

(Example) Hereinafter, an example of the present invention will be specifically described based on FIGS. 1 and 2. Note that the same members as those of the smaller conventional type shown in FIG. 3 are denoted by the same reference numerals, and explanations thereof will be omitted.

In this embodiment, as shown in FIG. 1, a horizontal conductor 10 is connected between branches 6a and 6b provided horizontally with respect to the track side container 6 of the vertically arranged track unit 1. A movable side electrode 11 of the disconnector is connected to this horizontal conductor 10, and a fixed side electrode 5 is disposed at a position opposite to this movable side electrode 11. Further, the fixed side electrode 5 is connected to a cable cone 4 arranged below the line side container 6 of the line units 1 to 1. Roughly speaking, a top lid 9 that can be opened and closed is attached to the top of the track side container 6.

Incidentally, the movable side electrode 11 is @
It is formed as a removable integral block. Also,
At least one of the horizontal conductors 10 disposed on both sides of the movable electrode 11 is provided with a detachable conductor 12 as shown in FIG. The structure is such that the side electrode 11 can be removed.

In the gas-insulated switchgear of this embodiment having such a configuration, when it becomes necessary to replace the fixed electrode 5 of the line-side disconnector 2, the upper M9 provided on the upper part of the line-side container 6 is replaced. The detachable conductor 12 is removed and placed on the horizontal conductor 10.
The stationary electrode 5 can be easily replaced by removing the movable electrode 11, which has a body block shape, from the horizontal conductor 10.

As described above, according to this embodiment, it is not necessary to disconnect the control cables of the track side disconnector 2, the track side earthing switch 3, etc. from each operating mechanism, and the container 6 of the track unit 1
The fixed side electrode 5 can be easily replaced by opening and closing only the 10M9 without removing the whole. Furthermore, since the track side container 6 is not removed, it is possible to prevent the internal equipment from being exposed to the outside air for a long period of time.

In addition, since there is no need to disconnect control cables for track-side disconnectors, track-side earthing switches, etc. from each operation R structure, wiring checks, interlock tests, switching characteristics tests, etc. can be performed after the fixed-side electrode replacement work is completed. There is no need to do this.

[Effects of the Invention] As described above, according to the present invention, a simple means is provided in which a detachable conductor is disposed on at least one of the horizontal conductors disposed on both sides of the movable side electrode of a disconnector. By,
It is possible to provide a gas insulated switchgear in which the fixed side electrode can be replaced in a short time and the quality of the equipment is improved.

[Brief explanation of the drawing]

Fig. 1 is an internal side view showing an embodiment of the gas insulated switchgear of the present invention, Fig. 2 is an enlarged view of the main part of Fig. 1, and Fig. 3 is an internal side view showing an example of the conventional gas insulated switchgear. It is a diagram. 1... Track unit, 2... Track side disconnector, 3...
・Line side grounding switch, 4...Cable cone, 5...
・Fixed side electrode, 6... Line side container, 7... Horizontal conductor, 8... Movable side electrode, 9... Top cover, 10... Horizontal conductor, 11... Movable side electrode, 12 ...Detachable conductor.

Claims (1)

[Claims] A line unit container containing a disconnector, cable cone, and earthing switch is placed vertically, with horizontal branching sections formed on both sides, and the two branches are connected by horizontal conductors. In a gas insulated switchgear, in which a movable side electrode of a disconnector is connected to the horizontal conductor, and a fixed side electrode is arranged at a position opposite to the movable side electrode, the movable side electrode of the disconnector is connected to A gas insulated switchgear characterized in that a removable conductor is provided on at least one of the horizontal conductors.