JP2000276964A - Ground-installed multi-circuit switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ground-installed multi-circuit switch capable of being enlarged corresponding to the number of customer at a low cost without requiring much labor. SOLUTION: A connector 10 is previously provided on an end of a branch line 3 of an existing multi-circuit switch unit 1 made up by juxtaposing, for example, four individual switches 2a to 2d and parallel-connecting them by the branch line 3 in the side of their one end. For enlargement, the connector 10 is connected to a branch line 8 of another multi-circuit switch unit 7 made up by juxtaposing, for example, two individual switches 2e, 2f and parallel- connecting them with the branch line 8 on the side of their one end. Both the existing multi-circuit switch unit 1 and another multi-circuit switch unit 7 are housed in an existing case 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground-mounted multi-circuit switch.

[0002]

2. Description of the Related Art When underground distribution lines, a case is installed on the ground, and a multi-circuit switch unit is accommodated in the case.
Each underground cable standing up from the basement was connected to each individual switch of the multi-circuit switch unit in the case.

[0003] Conventionally, underground works are mostly performed in urban areas. In this case, since the number of lines is large, as shown in FIG. 3, six individual switches 2a to 2f are juxtaposed as the multi-circuit switch unit 1, and
f was connected in parallel with the branch line 3 at one end. in this case,
For example, a trunk underground cable 4 is provided at the other end of the individual switch 2a.
And the underground cables 5 for consumers are connected to the other ends of the individual switches 2b and 2c, respectively, and the other ends of the remaining individual switches 2d and 2e having no consumers are vacant circuits. The trunk underground cable 6 was connected to the other end of the switch 2f. Such a multi-circuit switch unit 1 is housed in a case (not shown). As the multi-circuit switch unit 1, a gas switch in which individual switches 2a to 2f are housed in a container filled with an insulating gas (SF6 gas) is used. Individual switches 2a to be housed in containers
As 2f, a vacuum switch or an air switch can be used. In this case, it is not necessary to fill the container with the insulating gas.

[0004] However, recently, underground construction work has been performed in local cities. In a local city, since the number of lines is not so much required, as shown in FIG. 4, the multi-circuit switch unit 1 has four individual switches 2a to 2a.
It was sufficient to place d side by side.

[0005] Even in such a ground-mounted multi-circuit switch in a local city, the number of circuits is expected to increase in the future.

Conventionally, the extension of a ground-mounted multi-circuit switch is
This was performed as shown in FIGS.

[0007] For example, a multi-circuit switch unit in which four individual switches 2a to 2d are juxtaposed and one end of which is connected in parallel with a branch line 3 is installed in the ground-mounted multi-circuit switch shown in FIG. 1, another multi-circuit switch unit 7 in which four individual switches 2e to 2h are juxtaposed and equipment necessary for undergrounding are newly added, and one end of each of these individual switches 2e to 2h is connected. The other ends of the individual switch 2d of the existing multi-circuit switch unit 1 and the individual switch 2e of another multi-circuit switch unit 7 are connected by a cable 9 in parallel with a branch line 8, A main underground cable 6 is connected to the other end of the individual switch 2h, and a new customer underground cable 5 'is connected to the other end of the individual switch 2f of another multi-circuit switch unit 7. The other end of each of the remaining individual switches 2g without the holes was an empty circuit.

[0008] As shown in Fig. 5 (A), an extension using a ground-mounted multi-circuit switch shown in Figs. The existing multi-circuit switch unit 1 whose one end side is connected in parallel with the branch line 3 is removed, and instead, for example, six individual switches 2a to 2f are replaced.
And a multi-circuit switch unit 1 'having one end connected in parallel with a branch line 3 is newly provided. The other end of the individual switch 2a is connected to the trunk underground cable 4, and the individual switch 2b, 2
The underground cable 5 for consumers is connected to the other end of the switch c, and the underground cable 5 'for new customers is connected to the other end of the individual switch 2d. An open circuit was provided at the end, and a trunk underground cable 6 was connected to the other end of the individual switch 2f at the end.

An extension of the ground-mounted multi-circuit switch shown in FIG. 6 is performed by, for example, installing an existing multi-circuit switch in which four individual switches 2a to 2d are juxtaposed and one end thereof is connected in parallel with a branch line 3. One individual switch 2e is juxtaposed to the switch unit 1, one end of the individual switch 2e is connected to the branch line 3, and the other end of the individual switch 2e is connected to the new consumer underground cable 5 '. Was connected.

[0010]

SUMMARY OF THE INVENTION However, FIGS.
The expansion method shown in FIG. 6 has a problem that not only the equipment cost for the expansion is increased but also the construction is troublesome.

An object of the present invention is to match the number of consumers,
An object of the present invention is to provide a ground-mounted multi-circuit switch that can be added at low cost and without any trouble.

[0012]

According to the present invention, there is provided a multi-circuit switch unit in which a plurality of individual switches are arranged in parallel, and one end of each individual switch is connected in parallel with a branch line. A ground-mounted multi-circuit switch in which a switch unit is accommodated in a case is improved.

The ground-mounted multi-circuit switch according to the present invention is characterized in that a connection part is provided in a branch line of an existing multi-circuit switch unit in a case.

As described above, when a connection portion is provided on the branch line of the existing multi-circuit switch unit, the branch line of another multi-circuit switch unit is connected to this connection portion when the extension is added, so that the customer can be connected. In accordance with the number, the extension work can be performed at low cost and without any trouble.

In the ground-mounted multi-circuit switch according to the present invention, a connection portion is provided in a branch line of the existing multi-circuit switch unit in the case, and another multi-circuit is connected to the connection portion in the case. The branch line of the switch unit is connected.

As described above, when a connection portion is provided in a branch line of an existing multi-circuit switch unit in a case, and a branch line of another multi-circuit switch unit is connected to this connection portion in the case,
In accordance with the number of customers, the extension work can be performed at low cost and without hassle.

[0017]

1 and 2 show an embodiment of a ground-mounted multi-circuit switch according to the present invention. FIG. 1 is a circuit diagram before a case is installed, and FIG. It is a circuit diagram after installation of a case.

In the ground-mounted multi-circuit switch of this embodiment, for example, an existing multi-circuit switch unit 1 in which four individual switches 2a to 2d are juxtaposed and one end thereof is connected in parallel with a branch line 3 is used. A connection portion 10 is provided in advance at an end of the branch line 3. At the time of extension, for example, 2
The branch line 8 of another multi-circuit switch unit 7 in which individual switches 2e and 2f are arranged in parallel and one end of which is connected in parallel by a branch line 8 is connected. Each of the existing multi-circuit switch unit 1 and another multi-circuit switch unit 7 is housed in an existing case 11.

As described above, the existing multi-circuit switch unit 1
Is provided with a branch line 3 of another multi-circuit switch unit 7 at the time of extension.
, The extension work can be performed at low cost and without any trouble according to the number of customers.

[0020]

In the ground-mounted multi-circuit switch according to the present invention, a connection portion is provided in the branch line of the existing multi-circuit switch unit in the case. By connecting this branch line to this connection portion, the extension work can be performed at low cost and without any trouble according to the number of customers.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing an example of an embodiment of a ground-mounted multi-circuit switch according to the present invention, in which a case is not installed.

FIG. 2 is a circuit diagram showing an example of an embodiment of the ground-mounted multi-circuit switch according to the present invention, in which a case is installed.

FIG. 3 is a circuit diagram showing a conventional ground-mounted multi-circuit switch.

FIG. 4 is a circuit diagram showing a first example in which a multi-circuit switch unit is added to a conventional ground-mounted multi-circuit switch.

FIGS. 5A and 5B are circuit diagrams showing a second example of a process of adding a multi-circuit switch unit in a conventional ground-mounted multi-circuit switch.

FIG. 6 is a circuit diagram showing a third example in which a multi-circuit switch unit is added to a conventional ground-mounted multi-circuit switch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Multi-circuit switch unit 2a-2h Individual switch 3 Branch line 4 Main line underground cable 5 Underground cable for customer 5 'Underground cable for new customer 6 Main line underground cable 7 Another multi-circuit switch unit 8 Branch line 9 Cable 10 Connection Part 11 Case

Claims (2)

[Claims] 1. A multi-circuit switch unit having a plurality of individual switches arranged side by side, and one end of each of the individual switches is connected in parallel with a branch line, and the multi-circuit switch unit is housed in a case. A ground-mounted multi-circuit switch, wherein a connection portion is provided on the branch line in the case. 2. A multi-circuit switch unit having a plurality of individual switches arranged side by side, and one end of each of the individual switches is connected in parallel with a branch line, and the multi-circuit switch unit is housed in a case. In the above-mentioned ground-mounted multi-circuit switch, a connection portion is provided in the branch line in the case, and a branch line of another multi-circuit switch unit is connected to the connection portion in the case. A ground-mounted multi-circuit switch characterized by the following.