JPH0515607U - Gas insulated switchgear - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent the current flow from being obstructed by confining the decomposition products generated when the contacts come in and out. [Constitution] In a gas insulated switchgear such as a gas insulated switchgear or a circuit breaker in which an insulating gas 2 is enclosed in a closed container 1 and a movable contact 4 is brought into contact with or separated from a fixed contact 3, a contact 3 is provided under a container 1. , 4 form a confinement portion 9 into which the decomposition product 8 generated by the arc 7 at the time of contact and separation flows in and is confined. Further, a filter 13 that allows gas to pass through the confinement portion 9 and does not allow the decomposition products 8 to pass through is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

The present invention relates to a gas-insulated switchgear such as a gas-insulated switchgear, a circuit breaker, etc., in which an insulating gas such as SF ₆ is enclosed in a closed container and a movable contact point is moved toward and away from a fixed contact point.

[0002]

[Prior Art]

In a conventional device of this type, as shown in FIG. 4A, an insulating gas 2 of SF ₆ is enclosed in a sealed container 1, and in the container 1, a movable contact 4 is operated with respect to a fixed contact 3 and an operating lever 5 It is adapted to come into contact with and separate from the rotation of. The movable contact 4 moves left and right by the operation lever 5, but is always in sliding contact with the contact fitting 6.

[0003]

[Problems to be solved by the device]

 In the case of the above-mentioned conventional device, as shown in FIG. 4B, when the movable contact 4 is brought into contact with or separated from the fixed contact 3, an arc 7 is generated, and the high heat of the arc 7 causes the insulating gas 2 and the contacts 3 and 4 to come into contact with each other. The material is decomposed to generate a decomposition product 8, and the decomposition product 8 is deposited on the lower portion of the container 1 as shown in FIG. 4C.

When the contacts 3, 4 are opened or closed, that is, when the contacts are separated from each other, the decomposition product 8 soars up as shown in FIG. There is a problem that the movable contact 4 is thrown into the fixed contact 3 in a state where the decomposition product 8 is adhered to the fixed contact 3 and the decomposition product 8 is caught in the contact portion, thereby obstructing current flow.

In consideration of the above points, the present invention provides a gas-insulated switchgear in which decomposition products generated at the time of contact and separation of both contacts are confined so as not to hinder current flow. With the goal.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a gas-insulated switchgear such as a gas-insulated switchgear or circuit breaker in which an insulating gas is filled in an airtight container and a movable contact is brought into contact with or separated from a fixed contact. At the lower part, a confinement part is formed in which the decomposition products generated by the arc when both contacts come in and out flow in. In addition, the confinement part is provided with a filter that allows gas to pass but does not allow decomposition products to pass.

[0007]

[Action]

 In the gas-insulated switchgear of the present invention configured as described above, since the decomposition product confinement part is formed in the lower part of the container, the decomposition product generated at the time of contact and separation of both contacts is accumulated in the lower part of the container. An object is confined in the confinement part due to the pressure at the time of contact and separation of both contacts, and decomposition products do not rise and adhere to both contacts.

Further, by providing the filter in the confinement portion, only the gas of the gas and the decomposition products flowing into the confinement portion passes through the filter, the decomposition products are blocked by the filter, and the decomposition products flow into the confinement portion. Nothing will flow out of the containment and rise.

[0009]

【Example】

 An embodiment will be described with reference to FIGS. 1 to 3. In these figures, the same symbols as those in FIG. 4 indicate the same or corresponding ones. First, FIG. 1 showing one embodiment is one in which a confinement portion 9 is formed in the lower portion of the container 1 in FIG. The confinement portion 9 is formed on both sides of the lower portion of the container 1 by swash plates 10 having a substantially triangular cross section, and a plurality of guide plates 11 are provided between the swash plates 10 to confine gas, that is, the flow of decomposition products 8. Guide to Part 9.

Therefore, the decomposition product 8 generated by the contact and separation of both contacts 3 and 4 is deposited on the lower part of the container 1 as shown in FIG. 4A. By the flow of gas due to the pressure of, the gas flows into the confinement portions 9 on both sides and is confined as shown in FIG. 4B.

Next, FIG. 2 shows various examples of the confinement part 9 and the guide plate 11, and FIG. 2A shows a decomposition product formed by forming the bent part 12 on the upper part of the guide plate 11 of FIG. It prevents the soaring of 8.

FIG. 2B shows the guide plate 11 of FIG. 1 in the opposite direction of inclination, and C of FIG. 2 shows the swash plate 10 and the guide plate 11 in the same inclination direction. 1 and 2 are suitable when the lower part of the container 1 is a quadrangle such as a square or a rectangle. 2D shows a case where the lower portion of the container 1 is circular, in which an annular swash plate 10 having a low inner side is provided on the peripheral side, and an umbrella-shaped guide plate 11 is provided in the central portion.

Next, FIG. 3 shows another embodiment, which is different from FIG. 1 in that the swash plate 10 is composed of a filter 13. This filter 13 allows gas to pass through, but does not pass through the decomposition product 8, but only the gas flowing into the confinement portion 9 and the decomposition product 8 flows upward through the filter 13 and the decomposition product 8 passes through the filter 13. It is blocked by and remains in the confinement section 9.

[0014]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects. Since the confinement part 9 of the decomposition product 8 is formed in the lower part of the container 1, the decomposition product 8 generated at the time of contact and separation of both contacts 3 and 4 is accumulated on the lower part of the container 1 and the contact points of both contacts 3 and 4 are accumulated. It can be confined in the confining portion 9 by the pressure at the time of contact and separation, and the decomposition product 8 does not fly up and adhere to both the contacts 3 and 4, and it is possible to prevent the current flow from being disturbed.

Further, by providing the filter 13 in the confinement part 9, only the gas of the gas and the decomposition products 8 flowing into the confinement part 9 passes through the filter 13, and the decomposition product 8 is blocked by the filter 13. It is possible to reliably prevent the decomposition products flowing into the confinement portion 9 from flowing out of the confinement portion 9 and rising up.

[Brief description of drawings]

FIG. 1 is a cut-away front view of an embodiment of the present invention, where A is both contacts open and B is contact and separation.

2A, 2B, 2C, and 2D are schematic views of the modified example of FIG.

FIG. 3 is a cut-away front view of another embodiment of the present invention, in which A is when both contacts are open and B is when they are separated.

FIG. 4 is a cut-away front view of a conventional example, in which A is closed, B is in contact and separation, C is open, and D is in contact and separation.

[Explanation of symbols]

 1 Container 2 Insulating Gas 3 Fixed Contact 4 Moving Contact 7 Arc 8 Decomposition Product 9 Confinement 13 Filter

Claims (2)

[Scope of utility model registration request] 1. A gas-insulated switchgear such as a gas-insulated switch, circuit breaker or the like in which an insulating gas is sealed in a closed container and a movable contact is brought into contact with and separated from a fixed contact. A gas-insulated switchgear that forms a confinement part where the decomposition products generated by the arc during separation flow and are confined. 2. The gas-insulated switchgear according to claim 1, wherein the confinement portion is provided with a filter that allows gas to pass therethrough and does not allow decomposition products to pass therethrough.