JPS63209411A - 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, inside the circuit breaker container 21, there are different cutting portions 20 having a fixed side electrode 201 and a movable side electrode 202 in parallel with the axial direction.
It stores 0. In addition, the circuit breaker container 21 has two outlet terminal portions 27 and 28 and one outlet terminal portion 29 on both sides.
The main bus disconnector 30, 31 and the track side equipment 40 are connected to the respective lead terminal portions 27, 28, 29.

A current-carrying conductor 203 arranged parallel to the axis of the circuit breaker container 21 is connected to the fixed side electrode 201 of each different disconnection section 200. 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, a current-carrying conductor 204 arranged parallel to the axis of the circuit breaker container 21 is connected to the movable electrode 202 , and the other end 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. Furthermore, the ground contact part 301
And movable side ground contacts 303, 304 opposite to 302
are arranged so that they can be freely approached and separated. This movable ground contact 3
03 and 304 are individually driven by operating mechanisms 401 and 402, respectively.

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 exception of
3 and 304 must be inserted into the ground contact portions 301 and 302, respectively, to remove residual charges 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 operating mechanisms 401, 402, respectively, to ground both sides of the interrupting part 200, which reduces the cost of five devices. 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 size of the circuit breaker container 21 has increased, and the entire gas insulated switchgear has also increased in size.

(Problems to be Solved by the Invention) In this way, the conventional gas insulated switchgear
Operating mechanisms 40 are provided at ground contact portions 301 and 302 provided at the ends of current-carrying conductors 203 and 204 arranged parallel to one axis, respectively.
Movable ground contact 303.3 driven by 1.402
Since the 04 was placed close to and separated from the other, it was not possible 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 eliminate the above-mentioned problems, in the present invention, the grounding contact portions disposed on the fixed side electrode and the movable side electrode of the interrupting section are arranged close to each other, Connect and separate the ground contact part from a common ground contact.

(Function) With this configuration, the ground contact and its operation mechanism can be shared, providing a small and highly reliable gas insulated switchgear.

(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 both sides of the circuit breaker container 21, which houses a three-phase interrupting section 200 having a fixed electrode 201 and a movable 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 two lead terminal portions 29. And one outlet terminal part 21
．． 28, the live bus 1j is connected via the main bus disconnectors 30 and 31.
132 and 33 are connected 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 section 200 and the lead terminal sections 27 and 211. The other side of the current-carrying conductor 205 is branched into two parts and an output terminal part 27.2.
8, respectively. Further, a grounding contact portion 305 is provided at the end of the single current-carrying conductor 205 on the side of the movable electrode 202 .

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 orthogonal to $111, one end is located near the ground contact part 305, and the other end is led out from the lead terminal part 29. Further, a grounding contact portion 306 is provided at the end portion of the single current-carrying conductor 207 on the anti-sunrise terminal portion 29 side. This ground contact portion 306 is arranged on the axis extension of the four current-carrying bodies 205 and spaced apart from the ground contact portion 305 by a predetermined insulation distance 111.

Furthermore, an axial extension line connecting the ground contact parts 305 and 306 -
1-, a ground contact 307 has ground contact parts 305 and 306 spaced apart from the ground contact part 306 by a predetermined insulating distance. This ground contact 307 is connected to the operating device tII403.
The ground contact portions 306 and 305 can be brought into contact with and separated from each other.

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

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

In the energized state, the interrupter 200 is closed and disconnected from the ground contact 307. At this time, 5 current flows,
Main busbars 32, 33, main bus disconnectors 30, 31. It flows through the path of the current-carrying conductor 205, the movable electrode 202, the fixed-side electrode 201, the current-carrying conductor 2061, the current-carrying conductor 207, the line-side equipment 40, or the opposite path. The magnitude of the current flowing is measured by the current transformer 34. On the other hand, when inspecting the interrupting section 200 or in the event of an accident, the interrupting section 200 is tripped, and the grounding contact 307 is connected to the grounding contact section 305. , 306.

In this embodiment, the fixed electrode 201 of the cutoff section 200
and a ground contact portion 30G fixed to the movable side current 202, respectively.
and 305 are placed close to each other, so that the ground contact part 306°3
05 can be connected and grounded by a common ground contact 3077. Moreover, the operating mechanism 403 can be used as a common component.

Further, a current-carrying conductor 2 is provided between the interrupting part 200 and the circuit breaker container 21.
Only 05 is placed. Thereby, the circuit breaker container 21 and the circuit breaker 200 can obtain a sufficient insulation distance, and the circuit breaker container 21 can also be made smaller.

Furthermore, since the current transformer 34 is placed outside the current-carrying conductor 206, it is possible to provide a sufficient distance between the current transformer 34 and the circuit breaker container 21, improving dielectric strength and making it easier to attach and detach the current transformer 34. Furthermore, the present invention can also be applied to single-phase and single-bus type gas-insulated switchgear.

[Effects of the Invention] As explained above, in the present invention, the grounding contact parts provided on the fixed side electrode and the movable side electrode of the interrupting part are arranged close to each other, so that the grounding contactor and the operating mechanism can be easily connected to each other. It is possible to provide a small and highly reliable gas insulated switchgear that can be used in common.

[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... Current-carrying conductor, 30.3
1... Main bus disconnector, 32.33... Main bus,
34...Current transformer, 305.306...Ground contact part, 307...Ground contact. 40... Track side equipment, 403... Operation mechanism. Agent Patent Attorney Noriyuki Chika Yudo Hirofumi Mitsumata Figure 1

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 connected to the circuit breaker, a first grounding contact portion is arranged on a first current-carrying conductor that connects the movable electrode of the interrupting section and the main bus disconnector and is arranged parallel to the axis of the circuit breaker container. and a second grounding contact portion is disposed on a second current-carrying conductor that connects the fixed side electrode of the interrupting portion and the line side equipment and is disposed in a plane perpendicular to the breaker container axis; A first ground contact part and a second ground contact part are disposed adjacent to each other, and the first and second ground contact parts are operated by an operating mechanism on the axial extension of the first and second ground contact parts. A gas-insulated switchgear characterized by having a grounding contact that can be connected to and separated from the outside.