JPS62213020A - Gas-filled switch - 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] Industrial application field> This defense relates to a gas switch (the concept is used to include a breaker), and more specifically, it is a gas switch that blows gas into the arc that occurs during the breaker operation. This invention relates to a gas switch whose arc-extinguishing performance is improved by attaching the gas switch.

<Prior Art> Conventionally, gas switches with various configurations have been provided in order to improve arc extinguishing performance.

FIG. 3 is a schematic diagram showing a conventional example of a gas switch whose arc extinguishing performance is improved by blowing gas. Contact (
23) and surrounding the fixed contact (22) with a partitioning member (24), the fixed contact (22) side is used as a pressurizing chamber (25), and the movable contact (23) side is used as an exhaust chamber. It is configured as a chamber (26), and also has a partition member (24).
), the movable contactor (23) is introduced into the pressurization chamber (25). Moreover, the upper part of the movable contact (23) is formed into a cylindrical shape, and an exhaust port (27) for gas circulation is formed at a predetermined position of the cylindrical part. SF6 gas as an arc-extinguishing gas is sealed inside the insulating container.

According to the gas switch having the above configuration, the pressure in the pressurizing chamber (25) is reduced by the heat of the arc (28) generated between the fixed contact (22) and the movable contact (23) during the cutoff operation. By causing the upper culm to generate a gas flow (29) from the pressurization chamber (25) toward the exhaust chamber (26) through the exhaust port (27), and spraying the gas flow to the arc (28),
The effect of the cold comb 11 is enhanced and the arc (28) can be quickly extinguished.

However, according to the above switch, the pressure in the back pressure chamber (25) cannot be increased much in the small current range, so the pressure in the booster chamber (25) cannot be increased.
There is a problem in that it is not possible to increase the outflow rate of gas from the arc, and as a result, it is not possible to sufficiently cool the arc.

In order to address this problem, I installed a buffer.
However, both methods have the drawbacks of complicating the structure and being expensive, especially those with a buffer added. However, when the pressure in the pressurizing chamber and the pressure in the buffer are approximately the same, the disadvantage is that the gas cannot be sprayed effectively.

<1>Target> This light was made in view of the above problems.
Good Q'F'Ci arc extinction even in small current range (H)
The purpose is to cover gas switches that can be activated.

Means for Solving the Problems> In order to achieve the above object, the north gate gas switch is constructed so that the pressurizing chamber can be contracted in conjunction with the downward movement of the movable contact.

Effect> With the gas switch of the above configuration, the fixed contact is avoided from falling and at the same time, the nHl chamber is contracted by 1ν and 1! Then, the gas in the pressurization chamber is pressurized and the gas is forcibly discharged from the plowing port of the movable contactor. 1), it is possible to perform a jerking operation.

<Examples> Examples will be described below with reference to the accompanying drawings showing examples.

FIG. 1 is a schematic diagram showing the main parts of a gas switch, and its basic configuration is the same as that of the conventional gas switch described above. In other words, an insulating container (
A fixed contact (12) is immovably mounted inside the insulating container (11), and the central part of the bottom plate of the insulating container (11) is hermetically penetrated. The movable contactor (13) is mounted on the C pull, and the 1-2 fixed contactor (12) is further surrounded by the partition member (14), and the fixed contactor (12) side is made into a 4-loaf chamber (
15), and the movable contact (13) side is used as an exhaust chamber (16). At this point, the first movable contact (13) is introduced into the pressurizing chamber (15) from the bottom side of the compartment '4A (14). Further, the movable contactor (13) has a cylindrical upper portion, and a plowing port (17) for gas circulation in the lower portion of the cylindrical portion. In Part 1, SF6 as an arc-extinguishing gas is contained inside the I-distribution rim container (11).
It is filled with gas.

In the gas switch J3 having the above configuration, the partitioning member (14) for configuring the pressurization chamber (15) has a double internal and external structure (
The outer partitioning member (14a) and the inner partitioning member (14b) are freely assembled. The outer partition member (14a) is formed in the shape of a closed container, and the inner partition member (14b) is formed in the shape of a cup with an open top.

In addition, the outer partition member (14a) is fixed to a predetermined part of the movable contact (13) on the -5=bottom side, and moves downward by 1" in conjunction with the movable contact (13). In addition, the outer partition member (1
The upper part of 4a) is fitted into the fixed contact (12) airtightly and freely. On the other hand, the inner partition member (14b) is made to stand up from the bottom of the insulating container (11),
And insert the partition member (14a) 1! connecting rod (14c
), it is supported in a buoyant state. Note that the movable contact (13) is inserted into the inner partition member (14b) in a freely movable manner.

With the above configuration, when the movable contactor (13) is lowered to perform the breaking operation, the outer partition member (14a
) can be lowered together with the movable contact (13). At this time, since the inner partition member (14b) is immovably fixed, the pressurization chamber (15) can be contracted in response to the downward stroke of the outer partition member (14a). This bundling forcibly pressurizes the gas in the pressurization chamber (15) and the exhaust port (13) of the movable contact (13).
17) (see Figure 2). That is, the pressure due to mechanical compression is 1-Vf, and the pressure due to arc heat is J and 10d? Which synergistic da J Song 31, very ♀
A gas flow at a high speed can be blown against the arc.The mechanical pressurization accompanying the lowering of the outer partition member (14a) must always be constant. As a result, the arc can be effectively cooled even in a small current range where there is little effect on arc heat.

On the other hand, when the movable contact (13) is turned upward to turn on the electric circuit, the outer partition +4 (14a) is also turned upward.
The volume of 411' (15) is expanded, and negative pressure is generated in the pressing chamber (15). For this reason, the movable contact (1
3) Through the 171 air port (17), the clean gas on the side of the air chamber (16) can be sucked into the air chamber (15), and the deteriorated gas remaining in the air chamber (15) can be removed. Therefore, even if the breaker operation is repeated in a short period of time, the arc-extinguishing performance will be reduced.
can be made to perform.

The gas switch of this type is not limited to the above embodiments, and the gist of this defense has been revised.
A variety of changes can be made to a certain extent.

As described above, if the gas switch of this invention is used, a gas flow will be forcibly generated not only in a large current area but also in a small current area, thereby achieving good arc extinguishing. It has a unique effect of 1!1q of performance.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view showing a gas switch as an example of this light, Fig. 2 is a longitudinal sectional view showing a gas switch in operation, and Fig. 3 is a longitudinal sectional view showing an example of a conventional gas switch. Surface diagram.

Claims (1)

[Claims] 1. Inside an insulating container filled with arc-extinguishing gas A pressurization chamber is provided in the pressurization chamber, and a fixed contact is installed in the pressurization chamber. In addition, there is an exhaust system for gas distribution. A movable contact with an air port is placed in the pressurization chamber. Pressure increase in the gas switch installed The chamber is linked to the lowering movement of the movable contact. It is characterized by being configured so that it can be contracted. gas switch.