JPH0534882B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a gas insulated switchgear,
More particularly, it relates to gas insulated switchgear having an improved metal enclosure housing circuit breakers and current transformers.

[Conventional technology]

An example of the structure of the circuit breaker and current transformer portions of a conventional three-phase gas-insulated switchgear is shown in FIGS. 5 to 7.
A circuit breaker 1 mainly consisting of circuit breakers b and 1c is housed in a main body 2a of a circuit breaker tank, that is, a metal container, and external lead-out conductors 5, 6, 7, 8, 9, and 10 of the circuit breaker are located in branches of the metal container. It passes through the trunks 2b and 2c and is connected to an insulating spacer 11 provided at the end of the branched trunk. The current transformer 13 is housed in a current transformer tank 12 provided adjacent to the branch bodies 2b and 2c via an insulating spacer 11, and a conductor 14 supported on the current transformer tank side of the insulating spacer 11 ,15,1
6, 17, 18, and 19 are connected to other switching equipment (not shown) adjacent to the current transformer tank 12 through the inside of the current transformer 13.

[Problem that the invention seeks to solve]

Conventional gas-insulated switchgear has the above-mentioned structure, and as a separate metal container from the circuit breaker container is provided for the current transformer, the structure is complex, the number of parts is large, and it is difficult to assemble. There were problems such as the long installation time required. In addition, if a problem occurs with the current transformer after installing a gas-insulated switchgear, it is difficult to inspect the current transformer while it is housed inside the metal container, so it is necessary to take the current transformer outside separately.
Another problem was that it was difficult to store it again.

This invention was made to solve the above-mentioned problems, and it simplifies the structure of the gas-insulated switchgear, downsizes it, and makes it possible to inspect the current transformer inside and to carry it in and out outside separately. The purpose is to

[Means for solving problems]

The gas insulated switchgear according to the present invention includes a main body whose axial direction is perpendicular, and a main body provided perpendicularly to the main body,
A metal container is constructed from a branch body serving as an external outlet for the circuit breaker, and the circuit breaker is housed in the main body in the axial direction of the main body, and a current transformer is housed in the branch body. It is something.

[Effect]

Since the metal container of the circuit breaker in this invention can house the current transformer as well as the circuit breaker, the structure of the gas insulated switchgear can be simplified by housing the circuit breaker and the current transformer in the same metal container. This reduces the time required for assembly and installation. In addition, the main body that makes up the metal container is arranged so that the axial direction of the main body is perpendicular, and the circuit breaker is housed inside the main body in the axial direction of the main body. The width can be shortened, the device can be made smaller, the installation space can be reduced, and it can be easily transported. Furthermore, if a problem occurs with the current transformer after installing the gas-insulated switchgear, the internal inspection can be easily carried out, and only the current transformer can be taken outside and reinstalled without removing other switchgear. .

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

As shown in FIGS. 1 and 2, the metal container that houses the circuit breaker has branch bodies 3 and 4 that are provided approximately at right angles to the main body 2 that houses the arc extinguishing chambers 1a, 1b, and 1c of the circuit breaker 1. The current transformer 13 is formed integrally with, for example, a mounting plate 21 provided inside the branch bodies 3 and 4.
It is attached to and housed within the branch body. Conductor 5, 6, 7, 8, 9, 1 for external draw of circuit breaker
0 are fixed in the arc extinguishing chambers 1a, 1b, and 1c, respectively, and connected to the current transformer internal conductor 20 near the circuit breaker side end of the current transformer 13 via, for example, a tulip conductor. The other end of the current transformer conductor 20 is connected to conductors 14, 15, 1 supported by other switching equipment (not shown).
6, 17, 18, and 19, respectively, in the vicinity of the ends of the current transformers far from the circuit breaker, in the same manner as conductors 5 to 10. As shown in FIG. 1, the main body 2 of the metal container has an opening 22 at the top, which is closed with a suitable lid 23. As shown in FIG.

With reference to FIGS. 3 and 4, a method of transporting the current transformer will be explained. Conductors 5, 6 for external extraction of circuit breaker 1,
7, 8, 9, 10 and the current transformer internal conductor 20 can be easily removed through an opening 22 in the main body 2 of the metal container. Therefore, it is clear that the current transformer 13 can be visually observed through the opening 22, and if necessary, it is possible to inspect a certain range by using special optical equipment.
This inspection includes conductors 5 to 10 and current transformer internal conductor 20.
This is possible even before it is removed. To carry the current transformer 13 out of the metal container, after removing the conductor, remove the current transformer 13 from the mounting plate 21, and remove the branch body 3,
4, guide it into the main body 2, and tilt it as shown in Fig. 3 to connect the arc extinguishing chamber and the main body wall.
It can be carried out through the opening 22 through the opening 22. Figure 4 shows the state after being carried out.

The above describes how to carry out the current transformer 13, but by reversing the above procedure, it is possible to carry it in again.

〔Effect of the invention〕

As described above, according to the present invention, a metal container is constituted by a main body whose axial direction is vertical, and a branch body that is provided at right angles to the main body and serves as an external outlet of the circuit breaker, The circuit breaker is housed in the main body in the axial direction of the main body, and the current transformer is housed in the branch body, so the structure is simple, the device can be made smaller, and it is easier to assemble. This has the effect of providing a gas-insulated switchgear that can be easily transported and has a reduced installation area.At the same time, the current transformer can be inspected and transported outside without removing other major equipment. This has the effect of allowing repairs to be carried out in a short time and at low cost.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a metal container of a circuit breaker in an embodiment of a gas-insulated switchgear according to the present invention, and FIG. 2 is a cross-sectional view of the branch body shown in FIG. 1. 3 is a front view of a part of the device in FIG. 1 showing how to carry out the current transformer, FIG. 4 is a plan view with the current transformer in FIG. 2 removed, and FIG. 5 is the conventional one. Figure 6 is a front view similar to Figure 1 showing a circuit breaker and current transformer in a gas-insulated switchgear, Figure 6 is a plan view similar to Figure 2 showing a conventional device, Figure 7 is a line taken along the line of Figure 5. - is a sectional view at -. In the figure, 1 is a circuit breaker, 2 is a main body of the metal container, 3 and 4 are branch bodies of the metal container, and 13 is a current transformer. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] 1. A gas insulated switchgear having a metal container in which an insulating gas is sealed and a circuit breaker is housed,
The metal container includes a main body whose axial direction is vertical, and a branch body that is provided perpendicularly to the main body and serves as an external outlet for the circuit breaker, and the circuit breaker is installed in the main body. A gas insulated switchgear characterized in that a current transformer is housed in the axial direction of the main body and in the branch body. 2. The gas insulated switchgear according to claim 1, wherein the metal container has an opening through which the current transformer housed in the branch body can be carried in and out. 3. The gas insulated switchgear according to claim 1 or 2, wherein the metal container is capable of housing three phases at once.