JPS61224810A - 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] [Field of application of the invention] The present invention relates to gas insulated switchgear.

[Background of the invention]

Figure 2 shows a typical skeleton with a potential transformer.

The breaker 4 has one end connected to the main bus 1 and the other end connected to a cable head 9. Grounding switches 3, 5.8 are connected to both ends of the circuit breaker 4 and to the cable head 9 side of the disconnection W7, respectively. Therefore, the instrument transformer 7
is connected to this circuit, but in general, (a) when it is connected between the breaker 4 and the new circuit 7, and (b) when it is connected between the breaker 7 and the cable head 9. There is. An example of a conventional gas insulated switchgear constructed according to these skeletons is shown in FIG. (Unexamined Japanese Patent Publication No. 54-15
(See No. 7243) The circuit breaker 4 is arranged vertically, and both terminals are led out from the - side.

The upper terminal is connected to a disconnector 7 constructed in the conductor tube 10 and further connected to a cable head 9.

A potential transformer 6 is connected between the breaker 4 and the breaker 7.
is connected by protruding upward. On the other hand, the lower terminal of the breaker 4 is connected to the main bus 1 via the disconnector 2 .

A portion of the upper conductor pipe has an opening that protrudes upward, and the instrument transformer 6 is placed there, so the overall height of the gas-insulated switchgear is determined by the instrument transformer. It turns out.

If the positions of the interrupter 7 and the potential transformer 6 in FIG. 3 are changed, the skeleton shown in FIG. 3(b) will be obtained, and the same can be said in this case.

Moreover, in the structure shown in FIGS. 4 to 5, a container having a main bus bar 1 and a disconnector 2 at an arbitrary height at a radial position opposite to the container housing the breaker 4, and a cable head 9 are provided. In the case where containers each having a disconnector 7 are connected, (a)
In the case of the skeleton, as shown in Fig. 4, the cable head 9 and the voltage transformer 6 are placed at substantially opposite positions at the same height, and the overall height is determined by the voltage transformer 6. However, in a skeleton like (b),
As shown in (a), (b) and (C), the top or longitudinal radial direction of the container with the cable head 9.

Furthermore, they were arranged in the radial direction on the side of the adjacent device.

However, these also have the drawback that the height and length of the entire device or the dimensions between the devices are determined by the voltage transformer 6.

[Purpose of the invention]

An object of the present invention is to provide a gas-insulated switchgear that is compact and prevents the overall size of the device from increasing due to partially protruding parts.

[Summary of the invention]

The present invention connects a main bus bar to one side of a vertical breaker container and a cable head container to the radially opposite portion,
An instrument transformer is placed approximately in the center of four cylinders: the breaker container and cable head container of this line, and the breaker container and cable head container of the adjacent line, and is connected to the cable head container of this line. .

[Embodiments of the invention]

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

Each of the component devices is sealed with an insulating medium such as SF or gas in a sealed container, and the device conductor constituting the main circuit is supported by a suitable insulator within the sealed container. In addition, in the general form of a substation, the equipment for each line, which is made up of similar skeletons, are arranged side by side in the direction in which the main bus 1 runs, and the necessary space for maintenance and inspection is secured for each line. There is.

FIG. 1 shows an embodiment of the present invention, in which a breaker 4 is arranged in a vertical, substantially cylindrical sealed container, an opening is provided on one side of the cylindrical container, and a container for accommodating the main bus line l is installed. Connected. Further, a container for storing the cable head 9 is connected to the opening at an arbitrary position facing in the radial direction, and the cable head is drawn out vertically downward. In this configuration, the main bus disconnector 2 is similarly housed in the container that houses the main bus 1, and the inspection grounding switch 3.5 of the breaker 4 is housed in the container that houses the breaker 4. stored in the same way. Furthermore, a line disconnector 7 and a line grounding switch 8
is similarly housed in the container that houses the cable head 9.

Now, in the skeleton shown in FIG. 2(a), that is, the one in which the potential transformer is placed closer to the Q or disconnector 4 than the line disconnector 7, the breaker is placed as shown in FIG. In order to connect the container housing the line-side cable head to the container housing the cable head, an opening is provided at a position substantially radially opposite to the opening provided, and the instrument transformer 6 is connected to the opening. In this configuration, the instrument transformer 6 is arranged without increasing the overall dimensions compared to a configuration in which the voltage transformer 6 is not provided.

Next, the skeleton at j- shown in (b), i.e.
In the case where the voltage transformer is provided closer to the cable head 9 than the line disconnector 7, as shown in FIG. 1 of this embodiment,
The container housing the cable head 9 is provided with an opening in the radial direction, and the instrument transformer 6 is connected to the container. However, without increasing the overall dimensions compared to the configuration without it,
In addition, in order to secure the space necessary for maintenance and inspection, four cylindrical containers are arranged: the breaker container and cable head container for the adjacent gas-insulated switchgear, and the line breaker container and cable head container. A single-line voltage transformer 6 is disposed approximately in the center of the space, and is connected to an opening provided in the cable head container.

〔Effect of the invention〕

According to the present invention, when an instrument transformer is provided closer to the line than a line disconnector, the device can be downsized.

[Brief explanation of drawings]

FIG. 1 is a device configuration diagram of an embodiment of the present invention, FIG. 2 is a circuit configuration diagram showing an example of a switchgear to which the present invention can be applied, and FIGS. 3 to 5 are conventional device configuration diagrams. It is. l...Main bus bar, 2,7...Disconnector, 3.5.8...
- Earthing switch, 4... Breaker, 6... Instrument transformer, 9... Cable head.

Claims (1)

[Scope of Claims] 1. One terminal of a cable disconnector housed in a cylindrical sealed container is connected to the main bus bar, and the other terminal is connected to the line side cable head, and An opening is provided on one side in the radial direction to connect the container forming the main bus bar, and an opening is provided on the opposite side in the radial direction to connect the cable head container, wherein: In the case of a circuit in which the potential transformer is installed on the line side, the container for the potential transformer is placed between the gas insulated switchgear, the disconnect container and the cable head container, and the adjacent gas insulated switchgear. A gas insulated switchgear characterized in that the gas insulated switchgear is arranged approximately in the center of four cylinders of the cable head container and the cable head container.