JPS63209410A - Gas insulated switchgear - 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 [Object of the Invention] (Industrial Application Field) The present invention relates to a gas insulated switchgear in which the arrangement of a grounding device housed in a circuit breaker container is improved.

(Prior Art) In recent years, gas-insulated switchgears in which a plurality of devices are housed in one container have been employed. This gas insulated switchgear has a configuration shown in, for example, Japanese Patent Laid-Open No. 187217/1983. This gas insulated switchgear has a configuration as shown in FIG.

That is, in the circuit breaker container 21, each phase interrupting part 2 has a fixed side electrode 201 and a movable side type pA202 in parallel with the axial direction.
It stores 00. Further, the circuit breaker container 21 has two outlet terminal portions 27.28 and one outlet terminal portion 29 on both sides, and the main FFI line new line switch 30.31 and the outlet terminal portion 27.28. The fixed side electrode 201 of each different disconnection section 200 connects the line side equipment 4o.
A current-carrying conductor 203 arranged parallel to the axis of the circuit breaker container 21
is connected. This current-carrying conductor 203 is branched into two and led out from the lead terminal portions 27 and 28. Further, each phase current-carrying conductor 203 has a ground contact portion 301 at the lower end thereof. On the other hand, the movable side electrode 202 has the circuit breaker container 2
A current-carrying conductor 204 arranged parallel to one axis is connected,
The inside of this current-carrying conductor 204 is led out from the lead terminal portion 29 . Each phase conductor 204 has a ground contact portion 302 at its lower end. Further, a movable ground contact 30 is provided opposite the ground contact parts 301 and 302.
3.304 are arranged so as to be able to freely approach and separate. The movable ground contacts 303 and 304 are connected to operating mechanisms 401 and 402, respectively.
are individually driven.

By the way, in the gas insulated switchgear having such a configuration, when the interrupting section 200 is inspected or an accident occurs, the interrupting section 200 is
With the exception of
3 and 304 to the ground contacts 301 and 302, respectively, to remove the residual charge before carrying out the work.

However, in the conventional gas insulated switchgear, it is necessary to provide two movable side ground contacts 303, 304 and an operating device VT401, 402 to ground both sides of the interrupting part 200, which reduces the cost of the equipment and It was not possible to make it smaller.

In addition, current-carrying conductors 203 and 204 are provided on both sides of the interrupting part 200.
, it is necessary to provide sufficient insulation distance between the insulating current-carrying conductor 203 and the circuit breaker case 21 and between the current-carrying conductor 204 and the circuit breaker case 21 . For this reason, the circuit breaker container 210 has become larger, and the entire gas insulated switchgear has also become larger.

(Problems to be Solved by the Invention) In this way, the conventional gas insulated switchgear
An operating mechanism 401 is provided at each of the ground contact portions 301 and 302 provided at the ends of the current-carrying conductors 203 and 204 arranged parallel to one axis.
．． Movable ground contact 303, 30 driven by 402
4 were placed close to each other and separated from each other, making it impossible to reduce the size.

The present invention was made in order to eliminate the above-mentioned problems, and an object of the present invention is to provide a small and highly reliable gas-insulated switchgear.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, in the present invention, both ground contact portions are arranged on the track side equipment side of the fixed side electrode and the movable side electrode, respectively, and this ground contact portion The operating mechanism collectively drives the surface contactors that move toward and away from each other.

(Function) With this configuration, it is possible to ensure a sufficient insulation distance between the current-carrying conductor of the circuit breaker 1 and the circuit breaker container, and it is also possible to reduce the diameter of the circuit breaker container.

(Example) An embodiment of the present invention will be described below with reference to FIG.

Note that parts equivalent to the conventional components shown in FIG. 2 will be described with the same reference numerals. On the surface side of the circuit breaker container 21, which houses a three-phase interrupting section 200 having a fixed side electrode 201 and a movable side electrode 202 in parallel with the axial direction, there are two lead-out terminal sections 27 and 28 spaced apart from each other vertically. It has one lead terminal portion 29. Then, the output terminal part 27
．． 28, the main bus 3 is connected via the main bus disconnector 30.31.
2. Connect 33 respectively.

On the other hand, the outlet terminal section 29 is equipped with a track side equipment 40 in which a disconnector, a grounding switch, and a cable connection section are housed in the same container.
Connect.

Furthermore, one side of a current-carrying conductor 205 arranged parallel to the axis of the circuit breaker container 21 is fixed to the movable electrode 202 of each different cutting section 200 . This current-carrying conductor 205 is arranged between the cutoff part 200 and the lead terminal parts 27 and 28. The other side of the current-carrying conductor 205 is branched into two, leading to terminal portions 27 and 28.
Each is derived from

On the other hand, one side of a current-carrying conductor 206 extending in the axial direction of the cutoff part 200 is fixed to the fixed electrode 201 of each different cutoff part 200 . The other side of this current-carrying conductor 206 is fixed to a current-carrying conductor 207. This current-carrying conductor 207 is connected to the circuit breaker container 21.
It is arranged in a plane perpendicular to the axis and led out from the one-output terminal portion 29.

A current transformer 34 for current measurement is arranged outside the current-carrying conductor 206.

Further, a ground contact portion 305 is provided on the line side equipment 40 side of the movable side electrode 202. Similarly, fixed side electrode 201
A ground contact portion 306 is provided on the track side equipment 40 side.

In addition, a ground contact 307 that moves in a plane orthogonal to the axis of the circuit breaker container 21 and can freely come into contact with and separate from the ground contact portion 305 is disposed in the circuit breaker container 21 facing the ground contact portion 305 .

A predetermined insulation distance is maintained between the ground contact portion 305 and the ground contact 307 when separated. Similarly, in the circuit breaker container 21 facing the ground contact portion 306, the circuit breaker container 2
A ground contact 308 that moves in a plane orthogonal to one axis and can freely come into contact with and separate from the ground contact portion 306 is provided.

A predetermined insulation distance is maintained between the ground contact portion 306 and the ground contact 308 when separated.

And the surface ground contacts 307 and 308 are connected to the circuit breaker container 2.
They are collectively driven by an operating mechanism 403 disposed on one side.

Next, the operation of the configuration of this embodiment will be explained.

In the energized state, the interrupter 200 is closed and the ground contacts 307, 308 are disconnected from the ground contacts 305, 306. At this time, 1 energizing current is raw mother & 1i32v
33, Main bus disconnector 30.31, 4 energized bodies 205. It flows through the path of the movable electrode 202, the current-carrying conductor 201, the current-carrying conductor 2065, the current-carrying conductor 207, the line-side equipment 40, or the opposite path. Then, the magnitude of the applied current is measured by the current transformer 34.

On the other hand, in the event of an inspection of the interrupting section 200 or an accident, the interrupting section 200 is tripped, and the grounding contacts 307 and 308 are simultaneously connected to the grounding contact section 305゜3 by driving the operation mechanism 403.
06 respectively.

In this embodiment, ground contact portions 305 and 306 are provided on the fixed side electrode 201 and the movable side 11t4i202.

That is, since only the current-carrying conductor 205 is disposed between the interrupter 200 and the circuit breaker container 21, a sufficient insulation distance can be provided between the interrupter 200 and the circuit breaker container 21. Thereby, the reliability of insulation can be improved and the diameter of the circuit breaker container 21 can be reduced.

Further, since the ground contacts 307 and 308 are commonly driven by the operating device [403, the number of parts can be reduced.

Note that the present invention can also be applied to single-phase and single-bus type gas insulated devices.

〔Effect of the invention〕

As explained above, in the present invention, both ground contact parts are arranged on the line side equipment side of the fixed side electrode and the movable side electrode, respectively, and the surface ground contact that connects and separates from this ground contact part is operated. Since it is driven all at once by the mechanism, it is possible to secure a sufficient insulation distance between the current-carrying conductor of the interrupter 2 and the circuit breaker container, and to reduce the diameter of the circuit breaker container.A small and highly reliable gas-insulated switchgear. can be provided. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a gas insulated switchgear according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional gas insulated switchgear. 21... Breaker container 200... Breaking part 201
...Fixed side electrode 202...Movable side electrode 205,
206.207... Continuous conductors 30, 31... Main bus disconnector 32.33... Main bus 34... Current transformer
305. :106...Ground contact part 307, 3
08... Ground contact 4o... Track side equipment 403.
...Operating mechanism agent Patent attorney Nori Chika Yudo Hirofumi Mitsumata

Claims (1)

[Claims] Outlet terminals are provided on both sides of the circuit breaker container housing the interrupting section parallel to the axial direction, and the main bus is connected to one outlet terminal via a main bus disconnect switch, and the line side equipment is connected to the other outlet terminal. In the gas-insulated switchgear, the movable electrode of the interrupting section and the main bus disconnector are connected to each other, and the first current-carrying conductor is arranged parallel to the axis of the circuit breaker container, and the fixed electrode of the interrupting section is connected to the main bus disconnector. a second current-carrying conductor connected to the line-side equipment and disposed in a plane orthogonal to the breaker container axis; and a first grounding contact portion disposed on the line-side equipment side of the movable electrode; a second grounding contact portion disposed on the track side equipment side of the fixed side electrode; and a second grounding contact portion that moves in a plane orthogonal to the breaker container axis and is movable toward and away from the first grounding contact portion. a second ground contact that moves in a plane perpendicular to the breaker container axis and is movable toward and away from the second ground contact portion; A gas-insulated switchgear characterized by comprising an operation mechanism for collectively driving ground contacts.