JPS6051401A - Gas insulated switching device - 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 a gas insulated switchgear having a voltage transformer.

[Background of the invention]

FIG. 1 shows a typical skeleton with a potential transformer.

The other end of the breaker 4, which has one end connected to the main bus line l, is connected to a cable pend 9 via a disconnector 7. Earthing switches 3 and 5.8 are connected to both ends of the breaker 4 and to the cable head ijl of the breaker 7, respectively. A potential transformer 6 is connected between the breaker 4 and the breaker 7.

An example of a conventional gas insulated switchgear constructed according to this skeleton is shown in FIG.

The circuit breaker 4 is arranged vertically, and both terminals are led out from the negative side. The upper terminal has a thin acid disconnector 7 inside the conductor pipe 1o.
and further connected to the cable head 9.

An earthing switch 5 and a voltage transformer 6 are connected between the upper terminal and the disconnector 7, and a grounding switch a8 is connected between the new circuit 7 and the cable head 9. On the other hand, the lower terminal of the breaker 4 is connected to the main bus 1 via the disconnector 2, and the earthing switch 3 is connected between the breaker 4 and the disconnector 2.
ing.

As can be seen from the figure, the upper conductor pipe lo has a length that exceeds the lower disconnector 2 and the live bus ysx, and is connected to the cable head 9, and the n5 cable is connected to the main bus 1 on the anti-breaker side. hanging down. For this reason, the conductor tube 10 becomes longer,
The overall occupied area becomes larger. Moreover, since the voltage transformer 6 is connected to the upper part of the conductor pipe 10, the simplicity of the entire system is determined by the voltage transformer 6.

[Purpose of the invention]

It is an object of the present invention to provide a gas insulated switchgear which is made compact and prevents the overall height from increasing due to partial protrusions.

[Summary of the invention]

In the present invention, a pair of openings are formed in a substantially horizontal direction above a vertical breaker, and a horizontal voltage transformer is connected to one opening, and a new circuit device and a cable head are connected to the other opening. .

[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 conductors constituting the entire main circuit are supported by appropriate insulators within the sealed container.

The sealed container 30 of the vertical breaker 4 has an opening 31 at the bottom for leading out one terminal of the breaker 4, and two openings 32 at the top for leading out the other terminal of the breaker 4. 33 is formed. Both openings 32 and 33 are
It is desirable to form them on the same horizontal line so that they face each other, but
The openings 32 may be opposed to each other with some deviation in the circumferential direction of the sealed container 30, or may be slightly shifted in the vertical direction, but it is preferable that the opening 32 is formed above the opening 31. in any case,
It is sufficient that the sealed container 30 has a pair of openings 32 and 33 formed in the radial direction near the upper end thereof.

A three-phase coiled main bus 1 is connected to the lower opening 31 via an insulating spacer 34. A disconnector 2 is built in the enclosure of the main bus 1.

The circuit breakers 4 in the sealed container 30 are arranged for three phases, and one end is connected to the disconnector 2. The other terminal is in a sealed container 30
A central conductor 35 u provided in the axial direction.

35v, 35W are provided, and current transformer coils 3613, 36v, 36W are fixed surrounding these center conductors 35. At the upper end of the center conductor 35 is a substantially horizontal center conductor 3.
7u, 37v, 37W are fixed, rain center conductor 3
5.37, forming a substantially T-shape. center conductor 37
All three phases u, 37v, and 37W are arranged on the same horizontal plane. The insulating spacers 38 and 39, which provide gaseous separation between the line disconnector 4, the potential transformer 6, and the disconnector 7, are arranged so that their embedded center conductors are at each vertex of the triangle, and the uppermost Center conductor 3 connected to apex conductor 40
7v has a bend near the insulating spacers 38 and 39. This will be further explained with reference to FIG. 4, which shows the space as a @ view.

Center conductors 35u and 35v connected to the circuit breaker 4.

35W is arranged at each vertex of a substantially equilateral triangle within the sealed container 30. A center conductor 36u orthogonal to the center conductor 35
, a6v, and 36W are arranged at equal intervals on the same horizontal plane. This horizontal plane is a plane that passes approximately through the center line of the embedded center conductor 370.37W of the insulating spacer 38. Therefore, since the levels of the buried conductor 37u and the center conductor 36v do not match, the level of the center conductor 36v is changed by forming a bent part in the middle. Each center conductor is connected at an appropriate location by a contact 42. The embedded conductors of the insulating spacer 38 have a triangular shape, and are usually placed at each vertex of the inverted triangle. If the conventional method is adopted, insulation between the current transformer coil 36v and the center conductor 37v shown in FIG. 3 becomes a problem, resulting in an increase in the axial length of the sealed container 30, that is, the cylindrical size. However, this embodiment does not have this drawback.

The center conductor 37 VTTL has a bent part so as to change its level so that it is on the same horizontal plane as the other center conductors 37u and 37W, but it is also possible to make it straight between the embedded conductors of the insulating spacers 38 and 39. . However, this embodiment is also superior to this method. The reason for this is found in relation to the configuration of the earthing switch 5. That is, according to this embodiment, the high voltage side stators 40u, 40v, 40w of the earthing switch 5
can be configured on the same horizontal plane, and similarly the ground side movers 41u, 41v, and 41W can be configured on the same horizontal plane, and as a result, the axial length of the sealed container 30, that is, the overall height can be suppressed. I can do it. Ground side mover 41u, 41v
, 41w1j shown in the drawings, this is carried out by a tenacity operating device via a syringe mechanism, and can take a well-known configuration, for example, as introduced in Japanese Patent Application Laid-Open No. 57-135602.

Due to the configuration of this one-ground connector 5, it is preferable that the instrument transformer 6 and the cable head 9 are not connected at all to the upper end opening of the sealed container 3o.

A cable head container 43 is connected to the opening 33 via an insulating space V39, and a new circuit switch 7, a grounding switch 8, and a cable head 9 are housed in the container 43. Although it is desirable to manufacture the container 43 in one piece, it may be divided in the middle. However, it is effective to combine them into one waste space.

FIG. 5 shows another embodiment which is a modification of the one shown in FIG. 3, in which the sealed container 30 is reversed, the raw material 1 is placed upward, and the instrument transformer 6 and cable pen 9ff are placed downward.

In FIG. 6, the container 43 containing the disconnector 7 and the cable head 9 is placed almost horizontally, the cable is pulled out horizontally, the potential transformer is connected to the opening 33, and the container 43 is connected to the opening 32. This embodiment differs from the embodiment shown in FIG. 3 in that the embodiment shown in FIG.

FIG. 7 shows still another embodiment, in which the sealed container 30 containing the VFR device 4 is arranged horizontally.

In this example as well, one opening 31 is formed in the radial direction at one end of the fj sealing device 30 in the cap direction, and the main bus bar 1 is connected to this opening 31. form a pair of openings 32 and 33 facing each other in the radial direction;
An instrument transformer 6 is connected to the opening 33, and a container 43 is connected to the opening 33.

What these valley embodiments have in common is that one opening 31 led out in the radial direction is formed at one end of the sealed container 30 housing the breaker, and the main bus line l is connected to this opening 31. One pair of openings 32 and 33 in the radial direction at the other end of the sealed container 3.
and connect the potential transformer 6 to one of them,
A disconnector 67 and a cable head 9 are housed on the other side, and eight terminals 43K are connected. In some cases, the disconnector 7 may be omitted depending on the configuration of the substation, and the present invention can be applied even if it is installed there.

〔Effect of the invention〕

As explained above, the present invention does not connect the instrument transformer or the cable head container to the axial end face of the sealed container, but connects the instrument transformer and the cable head container to a pair of openings formed in the radial direction of the sealed container. By connecting the two, it is possible to reduce the overall height and obtain a small gas insulated switchgear. Further, since the axial end can be used for configuring the earthing switch, the configuration is simplified.

[Brief explanation of the drawing]

Fig. 1 is a skeleton showing an example of the configuration of a substation, Fig. 2 is a front view of a conventional gas insulated switchgear corresponding to Fig. 1, and Fig. 3 is a diagram of a gas insulated switchgear according to an embodiment of the present invention. FIG. 4 is a partially sectional front view, FIG. 4 is an enlarged perspective view of the main part of FIG. 3, and FIGS. 5 to 7 are front views of gas-insulated switchgear according to other different embodiments of the present invention. 1... Main busbar, 2... Disconnector, 3... Earthing switch, 4... Breaker, 5... Earthing switch, 6... Instrument transformer, 〆O) 7 ... Shinro equipment, 8... Earthing switch, 9... Cable head, 30... Sealed container, 31-33... Opening, 43... (10) Calendar II2] Name 20 Hawk 3 [2] Continued from page 1 0 Inventor Ken Takahashi Chiyosakusho, Tokyo 5-

Claims (1)

[Claims] 1. One terminal of the breaker housed in a cylindrical sealed container is connected to the main bus bar, and the other terminal is connected to the instrument transformer and the cable head, and the above-mentioned Wet
A radially extending opening is formed at one end of the sealed container, the main bus bar is connected to this opening, a pair of radially extending openings are formed at the other end of the sealed container, and one of the openings is connected to the main bus bar. A gas insulated switchgear, characterized in that the instrument transformer is connected to the other end, and the container of the cable head is connected to the other end.