JPH08306277A - Gas-insulation switching device - Google Patents

Abstract

PURPOSE: To restrict the assembling work inside of a container to the minimum, and to simplify the structure, and to facilitate the work by providing an opening for insertion of a switch unit in the front surface of the container. CONSTITUTION: A container 21 is provided with an opening for insertion of a switch unit 36 in the front surface so as to house the switch unit 36 together, and the switch unit 36 is inserted into the container 21 from the opening of the front surface of the container 21 after the unit 36 is assembled, and fitting is performed. The container 21 has a front part container 22 and a rear part container 23, and since plural units 36 are housed together in the front part container 22 and the rear part container 23, the number of gas sealing position can be reduced. Furthermore, since main equipments such as the switch unit 36 and a bushing 24 are fitted to the only front part container 22, connecting work of the main circuit master line 5 or the like is possible before fitting the rear part container 23 so as to facilitate the work. Furthermore, since operating mechanisms 27, 32 and the bushing 24 are arranged in the front surface of the front part container 22, fitting work can be performed from the front surface, and the handling property is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated switchgear in which a plurality of switches are housed in a gas-tight container.

[0002]

2. Description of the Related Art FIG. 7 is a circuit diagram showing a conventional gas-insulated switchgear disclosed in, for example, Japanese Patent Laid-Open No. 51-30330, FIG. 8 is a front view of the device shown in FIG. 7, and FIG. Side view,
10 is a sectional view taken along line XX of FIG. In the figure, 1
a, 1b, 1c are vacuum type switches, 2a, 2 respectively
Reference numerals b and 2c are disconnectors having rotary movable contacts, and 3 is a container for accommodating the switches 1a to 1c and the disconnectors 2a to 2c in an insulating gas atmosphere. As shown in FIGS. 8 and 9, the switches 1a to 1c and the disconnectors 2a to 2c for three phases are housed for each phase.

Bushings 4a, 4b and 4c are supported by the container 3, and electrically connect one end side of the disconnectors 2a to 2c and the outside of the container 3 with 5 crossing between the containers 3 and opening and closing them. A main circuit conductor for electrically connecting the containers 1a to 1c, 6 is a flange provided on the side plate 3a of each container 3, and the flange 6 has an O-ring groove 6a. Reference numeral 7 is an O-ring housed in the O-ring groove 6a, 8 is a hollow boss fixed to the side plate 3a of each container 3 by welding or the like, 9 is a bolt for fastening each container 3 via the hollow boss 8, Reference numeral 10 is a nut, 11 is a lid attached to both ends of the container 3, and 12 is an operation mechanism attached to the front surface of the container 3.

In the conventional gas-insulated switchgear configured as described above, the switches 1a, 1c and the disconnector 2a,
By closing 2b, the bushing 4a and the bushing 4c become conductive, and the switch 1b and the disconnector 2
When b is closed, a branch connection is made to the bushing 4b, and power is supplied to an electric device (not shown) such as a transformer connected to the bushing 4b.

[0005]

Since the conventional gas-insulated switchgear is constructed as described above, the assembling work must be carried out in the container 3, and the assembling space is small, so that the assembling work is required. There was a problem that it was difficult. Further, since each container 3 is independent, there are many connecting points and gas sealing points of the container 3, and there is a problem that the connecting work is time-consuming and labor-intensive. Furthermore, container 3
Since the main circuit conductor 5 between the units must be connected after the connection work of (1), there is also a problem that the installation work is difficult because of the internal connection of the container 3.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a gas-insulated switchgear having a simple structure and a simple structure, which minimizes assembly work in a container. The purpose is to get.

[0007]

A gas insulated switchgear according to the invention of claim 1 is a gas insulated switchgear comprising a switch unit having a plurality of switches and a container accommodating the switch unit. Is for accommodating the switch units all together, and an opening for inserting the switch units is provided on the front surface of the container.

A gas-insulated switchgear according to a second aspect of the present invention uses a container having a front container and a rear container, the front container having an opening and a bushing.

In the gas-insulated switchgear according to the third aspect of the present invention, the container is divided into a front container and a rear container near the central portion in the depth direction.

In the gas-insulated switchgear according to the invention of claim 4, the operating mechanism of the switch unit is arranged on the front side of the container.

In the gas-insulated switchgear according to a fifth aspect of the present invention, the main equipment including the switch unit and the bushing is mounted and supported on the front container.

[0012]

According to the first aspect of the invention, after the switch unit is assembled, the switch unit is inserted into the container through the opening on the front surface of the container and mounted.

According to the second aspect of the present invention, by providing the front container with the opening and the bushing, the assembling work becomes one-way work from the front side, and the assembling work is simplified.

According to the third aspect of the invention, since the container is divided into two parts in the vicinity of the central portion, workability is improved.

According to the fourth aspect of the present invention, since the operating mechanism and the bushing are arranged on the front surface, the installation work, the cable construction work, the maintenance and the like can be performed from the front surface, and the handleability is improved.

According to the invention of claim 5, by mounting and supporting the main equipments on the front container, it is not necessary to mount them on the rear container, and the connecting work of the main circuit bus etc. can be performed before mounting the rear container. You can do it.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. Example 1. 1 is a side view showing the internal structure of a gas-insulated switchgear according to Embodiment 1 of the present invention, FIG. 2 is a side view showing the switch unit of FIG. 1, FIG. 3 is a front view of FIG. 2, and FIG. FIG. 5 is a front view showing the container, and FIG. 5 is a side view showing the container of FIG.

In the figure, 21 is a container having a front container 22 and a rear container 23, and the front container 22 is shown in FIG.
As shown in, a cover 22a and a bushing attachment portion 22b that close the openings for inserting and attaching a plurality of switch units are provided. In addition, the packing groove 2 is provided on the flange 22c at the portion where the front container 22 and the rear container 23 are separated.
2d is provided, and the flange 23a of the rear container 23 is provided.
It is possible to connect with the seal.

A bushing 24 extends through the front container 22, and a cable connector 25 is connected to one end of the bushing. 26 is a main circuit conductor whose one end is connected to the other end of the bushing 24, and the other end is the main circuit conductor 26 shown in FIG.
It is connected to one end of a. At the other end of the main circuit conductor 26a, the disconnector 2 having a rotary movable contactor is arranged. Reference numeral 27 is an operating mechanism for operating the disconnector 2 via the disconnector operating shaft 28 and the insulating link 29.

Reference numeral 30 denotes a vacuum type switch as a switch connected in series to the disconnector 2, which has a pair of movable and fixed contacts built therein, and the movable contact side has a movable terminal 30.
It is connected to the insulating rod 31 via a. Reference numeral 32 is an operating mechanism connected to the insulating rod 31 via an operating shaft 33, 34 is a frame accommodating and holding components such as the vacuum switch 30 and disconnector 2, and 35 is a mounting base for operating the frame 24 and operation. It is a mounting base to which the mechanisms 27 and 32 are mounted.

Further, the gas-insulated switchgear according to the first embodiment has a switch unit 36 as shown in FIGS.
As shown in FIG. 1, a plurality of them are housed in the front container 32 and the rear container 33, and the main circuit bus 5 and the main circuit conductor 26 are connected to each other. Switch unit 3
6 has a function as one 3-phase switch unit, and the operation shaft 28,
33 is rotated, the disconnector 2 is opened / closed via the insulating link 39, and the vacuum rod switch 30 is opened / closed by raising / lowering the insulating rod 31.

In the gas-insulated switchgear constructed as described above, since the three switch units 36 are assembled outside the container 21, a working space is secured and the assembling work is facilitated. In addition, a functional test such as an opening / closing characteristic test can be performed before attachment to the container 21, and necessary adjustments can be easily performed. further,
Since the switch unit 36, the bushing 24, and the cable connector 25 are inserted into the front container 22 from the front side to be mounted, that is, are mounted in one direction, the assembly can be simplified.

Furthermore, the front container 22 and the rear container 2
3 is divided into two in the vicinity of the center in the front-rear direction, and is a container for accommodating a plurality of switch units 36 in a lump, so that the number of gas sealing points can be reduced. In addition, the switch unit 3
Since the main devices such as 6 and the bushing 24 are attached only to the front container 22, the main circuit bus 5 and the like can be connected before the rear container 23 is attached, which facilitates the work. Further, the operation mechanism 27, 32 is provided on the front surface of the front container 22.
Since the bushings 24 and the like are arranged, it is easy to handle the cable construction, maintenance and inspection from the front as well as the installation.

Embodiment 2 FIG. Although the front container 22 has a shape having a step between the opening and the bushing attachment portion 22b in the first embodiment, the shape of the container is not limited to this. For example, as shown in FIG. 6, a substantially flat plate-shaped front container 41 may be attached to the rear container 42.

Further, in each of the above-mentioned embodiments, the vacuum switch 30 is described as an example of the switch, but another switch such as a gas switch may be used. Furthermore, in each of the above-described embodiments, the vacuum switch 30 and the disconnector 2 are combined in the series, but the same effect can be obtained if they are used individually.

[0026]

As described above, in the gas-insulated switchgear according to the invention of claim 1, the opening for inserting the switch unit is provided on the front surface of the container, so that the switch unit is assembled outside the container. As a result, the assembly work can be facilitated, and the functional tests such as the opening / closing characteristic test can be performed before mounting on the container, and necessary adjustments can be easily performed. . Also, since the container holds the switch unit all at once,
It also has the effect of reducing the number of sealing points.

The gas-insulated switchgear according to the invention of claim 2 uses a container having a front container and a rear container, and the front container is provided with an opening and a bushing. Therefore, the same effect as that of the invention of claim 1 is provided. In addition to this, the assembly work is a one-way work from the front side, and there is an effect that the assembly work is simplified.

In the gas-insulated switchgear according to the invention of claim 3, the container is divided into a front container and a rear container in the vicinity of the central portion in the depth direction thereof. Therefore, in addition to the same effect as the invention of claim 2, Thus, there is an effect that it is possible to further easily attach the switch unit to the container.

In the gas-insulated switchgear according to the invention of claim 4, since the operating mechanism of the switch unit is arranged on the front side of the container, in addition to the same effect as the invention of claim 2, the installation work and the cable construction work are performed. Also, maintenance and inspection can be performed from the front side, and the operability can be improved.

In the gas-insulated switchgear according to the invention of claim 5, since the main equipment including the switch unit and the bushing is mounted and supported on the front container, in addition to the same effect as the invention of claim 2, the rear container is also provided. There is no need to attach main equipment to the, and the effect that the main circuit busbars and the like can be connected before the rear container is attached.

[Brief description of drawings]

FIG. 1 is a side view showing an internal structure of a gas-insulated switchgear according to a first embodiment of the present invention.

FIG. 2 is a side view showing the switch unit of FIG.

FIG. 3 is a front view of FIG. 2.

4 is a front view showing the container of FIG. 1. FIG.

5 is a side view showing the container of FIG. 1. FIG.

FIG. 6 is a side view showing the internal structure of a gas insulated switchgear according to a second embodiment of the present invention.

FIG. 7 is a circuit diagram showing an example of a conventional gas insulated switchgear.

FIG. 8 is a front view of the device of FIG.

9 is a side view of FIG. 8. FIG.

10 is a cross-sectional view taken along line XX of FIG.

[Explanation of symbols]

21 container, 22, 41 front container, 23, 42 rear container, 24 bushing, 27, 32 operating mechanism, 30
Vacuum switch (switch), 36 switch unit.

Claims (5)

[Claims] 1. A gas-insulated switchgear comprising a switch unit having a plurality of switches and a container accommodating the switch unit, wherein the container collectively accommodates the switch unit. A gas-insulated switchgear, characterized in that an opening for inserting the switch unit is provided on the front surface. 2. The gas insulated switchgear according to claim 1, wherein the container has a front container and a rear container, and the front container is provided with an opening and a bushing. 3. The gas-insulated switchgear according to claim 2, wherein the container is divided into a front container and a rear container near a central portion in the depth direction thereof. 4. The gas-insulated switchgear according to claim 2, wherein the operating mechanism of the switch unit is arranged on the front side of the container. 5. The gas insulated switchgear according to claim 2, wherein main components including a switch unit and a bushing are mounted and supported on the front container.