JPS61285011A - 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 industrial application] 5. -1 This invention relates to a gas insulated switchgear, and in particular to a gas insulated switchgear having an improved metal container for housing a circuit breaker and a current transformer.

[Conventional technology]

An example of the structure of the circuit breaker and current transformer portions of a conventional three-phase gas-insulated switchgear is as shown in Figures 5 to 7. )(/C) The circuit breaker (1) is housed in the main body (core a) of a circuit breaker tank, that is, a metal container, and the external lead-out conductors D)(A)(7)( r) (?) (10) is connected to the insulating spacer (//) provided at the end of the branch body through the branch body (Yb) (20) of the metal container. Current transformer(/
3) Connect the branch body (cob) via the insulating spacer (//)
Current transformer tank (/2) installed adjacent to (C)
) and supported on the current transformer tank side of the insulating spacer (//) (0(/j)(/A)(/7)(
/l) (/9) passes through the inside of the current transformer (/3) to other switching equipment (not shown) adjacent to the current transformer tank (/-).
It is connected to the.

[Problem that the invention seeks to solve]

Conventional gas-insulated switchgears were constructed as described above, but because a metal container was provided for the current transformer that was separate from the circuit breaker container, the structure was complex and had a large number of parts.
There were problems such as requiring a lot of time for assembly and installation. In addition, if a problem occurs with the current transformer after installing the 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.
Moreover, there was a problem in that it was difficult to re-storage.

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]

In the gas insulated switchgear according to the present invention, a branch body that can accommodate a current transformer provided at an external outlet of the circuit breaker is provided in the metal container of the circuit breaker so as to be substantially perpendicular to the main body, and The current transformer is housed in the same metal container.

[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. At the same time, if a malfunction occurs in the current transformer after installing gas-insulated switchgear, internal inspection can be easily carried out, and only the current transformer can be carried 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 Figures 1 and 2, the metal container that houses the circuit breaker is approximately perpendicular to the main body (2) that houses the arc extinguishing chambers (la), (lb), (/c) of the circuit breaker (1). Branch trunk provided (
,? ) (4I) and current transformer (/3)
is attached to, for example, a mounting plate (2/) K provided inside the branch body (3) (da), and is housed within the branch body. The conductor (!;) (A') (ri) (g) (9) (10) for the external drawer of the circuit breaker is the arc extinguishing chamber (la) (lb) (/
c) and connected to the current transformer internal conductor (JO) via, for example, a tulip conductor, near the circuit breaker side end of the current transformer (/3). Current transformer conductor (:lO)
The other end is a conductor (
/s(/r)(/+)(/7)(/z)(lq), respectively, the conductor (ma) at the end farthest from the circuit breaker of the current transformer.
- (10) are connected in the same manner. As shown in Figure 1, the main body of the metal container (2) has an opening (22) at the top.
) and is closed with an appropriate lid (, zJ).

The method for carrying out the current transformer will be explained with regard to the third and third figures.

Conductor (t) (6) (7) (for external lead-out of circuit breaker (1)
t)(q)(10) and the current transformer internal conductor (20) can be easily removed through the opening (2) in the main body (2) of the metal container. Therefore, from the opening (U2) to the current transformer (/,
? ) can be visually observed, and if necessary, it is possible to inspect a certain range by using special optical equipment. ) is possible even before removing it. To remove the current transformer (/3) from the metal container, remove the conductor and then remove the current transformer (/3) from the metal container.
/3) is removed from the mounting plate (21), the branch body (3) (
ll), guide it into the main body (2), tilt it as shown in Figure 3, pass through the gap between the arc extinguishing chamber and the main body wall, and open the opening (2). It can be transported outside. Figure 3 shows the state after removal.

The above describes how to carry out the current transformer (/3), 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, since the current transformer is housed in the branch body of the metal container of the circuit breaker,
The gas insulated switchgear has the advantage of having a simple structure and can therefore be made compact), and at the same time, the current transformer can be inspected and carried outside without removing other major equipment, making inspection and repair quick. It has the effect of being time-consuming and inexpensive.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a circuit breaker metal container portion of an embodiment of the gas-insulated switchgear according to the present invention, and the container is a sectional view;
The figure is a horizontally cut plan view of the branch body shown in Figure 1;
Figure 3 is a front view of a part of the device in Figure 1 showing how to carry out the current transformer, Figure 9 is a plan view with the current transformer in Figure 2 removed, and Figure 5 is a conventional gas insulation FIG. 6 is a front view similar to FIG. 1 showing the circuit breaker and current transformer in the switchgear, FIG. 6 is a plan view similar to FIG. 2 showing the conventional device, and FIG.
FIG. In the figure, (1) is the circuit breaker, (2) is the main body of the metal container, (3) (lI) is the branch body of the metal container, and (/3) is the current transformer. In each figure, the same reference numerals indicate the same or corresponding parts. Fig. 1 13゛ Fig. 2 Fig. 3 Fig. M) Fig. 4 W-) Fig. 5

Claims (3)

[Claims] (1) In a gas-insulated switchgear comprising a metal container filled with insulating gas and housing a circuit breaker, and a current transformer disposed in at least one of the external outlets of the circuit breaker, the metal container A gas insulated switchgear characterized by comprising a branch body section that is provided substantially perpendicularly to a main body section that accommodates a circuit breaker and that can house the current transformer. (2) The gas insulated switchgear according to claim 1, wherein the metal container has an opening through which a 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.