JPH0667063B2 - Gas insulated composite switchgear for switchyards - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a gas-insulated composite switchgear for switchyards, and more particularly to a double-bus type gas-insulated composite switchgear for switchgear.

[Background of the Invention]

Recently, gas-insulated composite switchgear has been generally adopted in order to reduce the size of switchgear by efficiently utilizing the site. As shown in FIG. 2, this type of device is provided on the site of the retractable tower 10 part of the switchyard on the transmission side bushing 5A,
The disconnecting switches 8A and 8B for establishing 5B and the gas circuit breakers 1A and 1B connected to the container are correspondingly separated from each other and the phases are arranged side by side. Between the gas circuit breakers 1A and 1B, there are two gas-insulated connection busbars 2 arranged in parallel, and gas-insulated circuit breakers 3A and 3A are provided at both ends.
3B, a grounding switch, etc. are interposed and connected, and power-receiving-side bushings 4A, 4B are established at symmetrical positions of the respective connecting busbars 2 close to the gas circuit breakers 1A, 1B so as to have a gas-insulated configuration. . One power transmission line 6A guided to the service tower 10 is connected to each of the power receiving bushings 4A and 4B of each phase of this device via a service line 7A, and the other power transmission line 6B is connected to a service line 7B. ing.
Japanese Patent Application Laid-open No. Sho 56-56 discloses such a device.
No. 22505, etc. are mentioned.

However, in the configuration of the switchyard by the above-mentioned device, the service lines 6A and the power receiving side bushing 4A, and the service lines 6A and the power receiving side bushing 4B used for connecting the power receiving lines 7A and 7B are connected between the phases. In order to ensure a sufficient insulation distance for each transmission side bushing 5 installed at the end
A and 5B must be provided outside the lead-in position of the power transmission lines 6A and 6B. Therefore, the receiving bushings 4A, 4
The distance between B and the power transmission side bushings 5A and 5B and between the power reception side bushings 4A and 4B becomes large, and the connecting bus bar 2 must be made long, and the entire device becomes large, and the installation area of the entire switchyard is Not only does it increase significantly, but it also has the drawback that it cannot be manufactured economically.

[Object of the Invention]

An object of the gas-insulated composite switchgear for switchgear of the present invention is to secure an insulation distance between a service wire and a bushing on the power transmission side, and to reduce the size of the entire device to significantly reduce the installation area.

[Outline of Invention]

In the gas-insulated composite switchgear for switchgear according to the present invention, each receiving-side bushing is established on the connecting bus bar so as to be located between each transmission line leading to the service tower, and the transmitting-side bushing is connected to the gas circuit breaker. The insulation distance between each part is secured by pulling out horizontally from the intermediate container connected to the disconnector container, and by establishing a retractor insulator in each intermediate container and mooring the drop wire from the power transmission line to this. Therefore, the length of the connecting bus bar is shortened, and the entire device is miniaturized to achieve the above object.

Example of Invention

Hereinafter, the gas-insulated composite switchgear for switchgear according to the present invention will be described with reference to FIG.

In the embodiment of FIG. 1 of the present invention, the power receiving side bushings 4A, 4B established on each connection bus 2 are located inside between the three-phase power transmission lines 6A, 6B on both sides leading to the service tower 10. Is configured as follows. Besides, each transmitting side bushing 5
A and 5B are drawn out in a substantially horizontal direction from the intermediate containers 11A and 11B which will be described later. That is, each intermediate container 11A, 11B is connected to each gas circuit breaker 1
The intermediate switches 11A, 11 are connected to the upper ends of the other ends of the disconnecting switches 8A, 8B connected to A, 1B so as to lead out the transmission-side bushings 5A, 5B substantially horizontally, respectively.
B anchors 12A and 12B having substantially the same height as the power receiving bushings 4A and 4B are established on B. Then, at the upper end of each of the anchors 12A and 12B, the transmission lines 6 on both sides are
The service lines 7A and 7B from at least the outermost one of the service lines A and 6B are once moored to secure the insulation distance from the service lines of the other phases and the transmission side bushings 5A and 5B, and then the service lines 7A and 7B. , 7B are connected to the power-receiving-side bushings 4A, 4B of the corresponding phases, so that a normal double bus structure is formed.

In the embodiment of the present invention configured as described above, the power receiving side bushings 4A, 4B established on the respective connecting buses 2 are positioned between the power transmission lines 6A, 6B on the respective sides, and the gas circuit breakers 1A, 1
At the upper end of each disconnector 8A, 8B connected to B, the intermediate container 1
1A and 11B are connected to each other, and the transmission side bushings 5A and 5B are led out to the respective intermediate containers, and the retractor wires 7A and 7B are moored using the retractor insulators 12A and 12B established above, and then the power receiving side bushings 4A and 5B. Because it was connected to 4B,
Since the insulation distance between each part can be secured sufficiently,
Since the entire device can be manufactured without significantly increasing the insulation size between the devices, the axial size of the device can be significantly reduced as compared with the conventional device. Therefore, the installation area of the double-bus type gas-insulated switchgear at the switchgear can be reduced substantially by about half compared to the conventional one.

〔The invention's effect〕

If the gas-insulated composite switchgear for switchgear is configured as in the present invention, the intermediate container connected to the other end side of the disconnector container connected to each gas circuit breaker is effectively utilized, and the bushing on the power transmission side is almost removed from the intermediate container. Since the detention insulators that are led out horizontally and project to the transmission line side were established respectively, and the drop wires were moored to each draw insulator, the insulation distance between the drop wire and each part of the gas-insulated composite switchgear can be sufficiently secured. The overall length dimension can be shortened for downsizing, and there is an excellent effect that this installation area can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a gas-insulated composite switchgear for a switchyard according to the present invention, and FIG. 2 is a front view showing a conventional gas-insulated composite switchgear for a switchyard. 1A, 1B ... Gas circuit breaker, 2 ... Connection bus bar, 3A, 3B,
8A, 8B ... Disconnector, 4A, 4B ... Power-receiving-side bushing,
5A, 5B ... Transmission side bushing, 6A, 6B ... Transmission line,
7A, 7B ... Service line, 10 ... Service tower, 11A, 11B
... intermediate containers, 12A, 12B ... retractor insulators.

Claims (1)

[Claims] 1. A gas circuit breaker, which is installed correspondingly on the site of a service tower, is connected to the gas circuit breaker via a disconnecting switch, and the gas circuit breaker is connected to the gas circuit breaker via a disconnecting switch. The gas-insulated composite switchgear of each phase having at least two connecting busbars and a power-receiving-side bushing established on each of the connecting busbars is installed, and the gas-insulated composite switchgear of each phase is led to the installation side of each gas circuit breaker. The power transmission line is connected to the power receiving side bushing of each phase through a service line,
Each of the power receiving side bushings is established on a connection bus bar so as to be positioned between the power transmission lines, and the power transmission line side bushings are led out in a substantially horizontal direction from an intermediate container connected to a disconnector container connected to each gas circuit breaker. A gas-insulated composite switchgear for a switchyard, characterized in that a detention insulator is established in each of the intermediate containers, and a lead-in wire from each transmission line is moored to the demolition insulator.