JPH0736649B2 - Gas insulated switchgear - Google Patents

Description

The present invention relates to a gas-insulated switchgear, and more particularly to a gas-insulated switchgear suitable for power receiving equipment in which a device is configured in a box-shaped container.

[Conventional technology]

2. Description of the Related Art Recent gas-insulated switchgear for power receiving equipment is configured by accommodating devices such as a circuit breaker and a disconnector in a box-shaped container filled with an insulating gas.

As an example, a gas-insulated switchgear for power reception with a two-line lead-in and two-bank configuration is introduced on page 16 of "Electrical Railway" Vol.39, No.9, and is shown in Fig.8.

In this example, the receiving side units A and E and the transformer connecting side units B and D
And a power consumption measuring device (hereinafter referred to as MOF) unit C,
Each line is constructed in one box-shaped container, the transformer connection side units B and D are distributed on both sides of the MOF unit C, and the power receiving units A and E are distributed on both sides. It is arranged. Therefore, the whole has a row board configuration in which five box-shaped containers are juxtaposed.

The power-reception-side unit A has the same configuration as the power-reception-side unit E, and includes a circuit breaker 2 and disconnectors 3 and 7 connected to both sides of the circuit breaker 2, and is connected to a transmission line (not shown) by a bushing 10. . Further, the transformer connection side unit B has the same configuration as the transformer connection side unit D, and includes a disconnector 5. Furthermore, MOF unit C is M
Composed of OF1. The units are electrically connected to each other as shown in the skeleton diagram.

[Problems to be solved by the invention]

Since the conventional gas-insulated switchgear was configured as described above, the power receiving side units A and E located on both sides of the MOF unit 1 and the transformer connecting side units B and D are electrically connected due to the circuit configuration. Must. This is desirable because it is possible to obtain a sufficient air insulation distance between the bushings 10a and 10b, considering that the power receiving side units A and E are connected to the power transmission line using the bushings 10a and 10b in many cases. However, as a result of the distribution of the power receiving side units A and E and the transformer connecting side units B and D on both sides of the MOF unit 1, the volume of the box-shaped container of each unit is large due to the conductors that electrically connect them. There was a shortcoming that it would be exhausted.

An object of the present invention is to provide a gas insulated switchgear in which the volume of the box-shaped container of each unit is reduced to reduce the installation area.

[Means for solving problems]

In order to achieve the above object, the present invention arranges two power receiving units on one side of a MOF unit and two power receiving units on the other side of the MOF unit.
One transformer connecting side unit is arranged, one of the bushings of the power receiving side unit, that is, the first bushing is provided in one power receiving side unit, and the other bushing, that is, the second bushing is a predetermined bush from the first bushing. It is characterized in that it is provided in the transformer connection side unit arranged at a position separated by an air insulation distance, and a cable is connected between the second bushing and the other power receiving side unit.

[Action]

Since the gas-insulated switchgear according to the present invention has the above-described configuration, both power-reception-side units to be electrically connected are arranged side by side on one side of the MOF unit, and therefore connection by a conductor is easy, and also the same. The electrical connection between the transformer connection side units arranged side by side on the other side of the MOF unit is also facilitated, and in the end, the box-shaped container can be made smaller than before by the conductors that make these electrical connections. . This miniaturization makes it difficult to secure a sufficient air insulation distance between bushings,
The first bushing is provided on one power receiving side unit, and the second bushing is provided on the transformer connecting side unit arranged on the other side of the MOF unit, and the second bushing is connected to the other power receiving side unit. This problem is solved by connecting a cable between them.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic structure of a gas insulated switchgear together with a skeleton.

The two power receiving side units A and E are configured by arranging the box-shaped containers 20 and 21 side by side. The details of the box-shaped containers 20 and 21 will be described later,
Circuit breaker 2, disconnectors 3 and 7 on both sides, and arrester 1
They are the same in that they have 1 and 1. However, the unit A on the power receiving side is
While the box-shaped container 20 is provided with the bushing 10a, the power receiving side unit E is connected to the box-shaped container 23 of another unit.
The difference is that 10b is provided. Both power receiving side units A and E are electrically connected by the conductor 24 on the disconnector 7 side, and MOF unit C
Connected to MOF1. In addition, the transformer connection side units B and D are M
It is arranged on the other side of the OF unit C, and in this embodiment, it is constructed in one box-shaped container 23 divided into two by a partition plate 25. These units B and D are composed of a disconnecting switch 5, which is electrically connected and is also connected to MOF1. However, since they are located in the vicinity, the structure of the conductor 26 for electrical connection is extremely simple, and the receiving side The depth dimension of the box-shaped container 23 is smaller than that of the units A and E. Therefore, a box-shaped container portion 27 is added on the side opposite to the cable head 6 which is the lead-out side of the disconnector 5, and the box-shaped container portion 27 is provided with the bushing 10b of the power receiving side unit E.

Therefore, paying attention to the bushings 10a, 10b, since both sides in the row board configuration are provided at the same position as the case of the power receiving side unit, the air insulation distance between the two is sufficient, and actually, Power receiving unit A, E is MOF unit C
Since they are juxtaposed on one side, the conductors for electrical connection are simplified, and the size of the box-shaped container is reduced accordingly.

A gas-insulated switchgear constructed based on this circuit configuration is shown in FIGS. 2 and 3, FIG. 2 is a plan view, and FIG. 3 is a front view. As you can see from this overall structure,
The bushings 10a, 10b of the power receiving side units A, E arranged side by side are arranged at both ends of the whole to ensure a sufficient air insulation distance.

Next, a specific configuration of each unit will be described with reference to FIGS.

FIG. 4 shows a power receiving unit farther from the MOF unit C. The box-shaped container 20 is divided into two parts by a partition wall 42 provided so as to face the door 41, the back side is filled with an insulating gas close to the atmospheric pressure, and the front surface is the atmosphere. A bushing 10a is established on the upper back side of the box-shaped container 20, and the central conductor of the bushing 10a is a arrester 11.
Is connected to one pole of the disconnector 3. The other pole of the disconnector 3 appears when the door 41 is opened.
Is connected to the lower end of the circuit breaker, and the upper end of the circuit breaker 2 is connected to one pole of the disconnector 7. The other pole of the disconnector 7 is connected to an adjacent power receiving side unit E by a conductor 24.

This adjacent power receiving side unit E is shown in FIG.
It is electrically connected to the power receiving side unit A by 24. The internal structure of the box-shaped container 21 is almost the same as that shown in FIG. 4, except that the bushing 10a shown in FIG. 4 is not provided and a cable head 4 corresponding to the bushing 10a is provided and led out by a cable 9. It's different. The conductor 24, which electrically connects to the adjacent power receiving side unit A, extends in the same axial direction and extends first.
It is connected to one terminal of MOF1 shown in the figure. Although the structure of MOF1 is the same as the conventional one, the illustration is omitted, but the conductor 26 connected to the other terminal of MOF1 is connected to the transformer connection side units B and D in FIG.

The box-shaped container 23 of the transformer connection side units B and D is divided into upper and lower two stages by partition walls 51 and 52, and an insulating gas close to the atmospheric pressure is enclosed in each of the divisions. A disconnector 5 connected to the conductor 26 is formed in the upper section, is led out by a cable 55 via a cable head 6, and is connected to a transformer (not shown). On the other hand, in the lower section, a disconnector 5 is formed which is connected to the conductor 26 via a bushing 54, is led out by a cable 56 via a cable head 6, and is connected to a transformer (not shown). In this way, two transformer connection side units B and D are configured in one box-shaped container 23. Further, a box-shaped container portion 27 is formed on the back side of the box-shaped container 23, which can be formed by dividing the box-shaped container 23 with a partition wall 57. Insulating gas near atmospheric pressure is also enclosed in the box-shaped container portion 27, and a bushing 10b is established above the insulating gas. The central conductor of this bushing 10b is led out by a cable 9 via a cable head 4 and connected to the power receiving side unit B in FIG.

Although the two transformer connection side units B and D are configured in one box-shaped container 27 in the above-described embodiment, separate box-shaped containers may be used, or the positions of the partition walls 51 and 52 may be changed.

As can be seen from the description of each unit like this,
When the power receiving side unit and the transformer connecting side unit are separately arranged on both sides of the MOF unit C, the structure of the conductor is complicated due to the connection with the MOF1 and the box-shaped container is large due to the insulation. However, the configuration of the conductors 24 and 26 is simplified by collecting the power receiving side units A and E in one of the MOF units C and the transformer connecting side units B and D in the other. .

In this embodiment, the power receiving side unit A is provided with the bushing 10a, and the power receiving side unit E is provided with the bushing 10b via the cable 9.
However, the power receiving side units A and E may be reversed.

〔The invention's effect〕

As described above, according to the present invention, two power receiving side units are arranged on one side of the MOF unit, one power receiving side unit is provided with the first bushing, and the second bushing is isolated from the first bushing by a predetermined insulation. Since it is provided in the transformer connection side unit which is arranged at a distance, and the cable is connected between the second bushing and the other power receiving side unit, the structure of the conductor for connection with the MOF is simplified. The box-shaped container can be downsized, and as a result, the installation area can be reduced. According to the conventional idea, if the power receiving units are juxtaposed to simplify the conductor, the required air insulation distance between the bushings cannot be secured, while on the other hand, both sides of the MOF unit must be secured in order to obtain the desired air insulation distance between the bushings. Dispersing the units on the power receiving side causes a contradiction in which the conductor is complicated and the box-shaped container is enlarged, but the present invention can solve this.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a gas-insulated switchgear according to an embodiment of the present invention, FIGS. 2 and 3 are plan and front views of a gas-insulated switchgear based on the skeleton diagram of FIG. 1, and FIG.
FIG. 5, FIG. 5 and FIG. 6 are side views showing the concrete constitution of each unit of FIG. 1, and FIG. 7 is a schematic constitution view showing the constitution of a conventional gas-insulated switchgear in skeleton. A: Power receiving side unit, B: Transformer connecting side unit, C: MO
F unit, D ... Transformer connection side unit, E ... Power receiving side unit,
1 …… MOF, 9 …… Cable, 10a, 10b …… Bushing,
20,21,22,23 …… Box-shaped container, 24,26 …… Conductor, 27 …… Box-shaped container part.

Claims (2)

[Claims] 1. A gas-insulated switchgear comprising two power-receiving-side units, a power-using-amount measuring device unit, and two transformer-connecting-side units, wherein the power-using-amount measuring device unit is provided on one side thereof. Configure two power receiving units, one of which is the first
And a second bushing provided on the transformer connection side unit, which is formed on the other side of the used electric energy measuring device unit, at a predetermined air insulation distance from the first bushing. A gas-insulated switchgear in which a cable is connected between the second bushing and the other unit on the power receiving side. 2. The unit according to claim 1, wherein the two transformer connection side units have a partition inside a box-shaped container arranged on the other side of the used electric energy measuring unit. A gas-insulated switchgear characterized by being configured in each of the at least two sections.