KR20120007659U - Contact apparatus for gas insulated switchgear - Google Patents

Abstract

The contact device for a gas insulated switchgear includes a pair of body portions, separators and couplings. The pair of body parts are symmetrical with each other and, when combined, form a hollow cylinder. The separating part is tightly coupled to the inner surface of the pair of body parts to separate the internal space of the pair of body parts. The coupling portion secures the pair of body portions and separation portions.

Description

Contact device for gas insulated switchgear {CONTACT APPARATUS FOR GAS INSULATED SWITCHGEAR}

The disclosed technique relates to a contact device, and more particularly to a cutaway contact device that can be used in various parts of a gas insulated switchgear.

The gas insulated switchgear is a power switchgear used for indoor power plants and substations, and can safely protect the power system by opening and closing a line safely following an abnormal state such as a power accident or a short circuit. The gas insulated switchgear uses a variety of contact devices such as disconnectors and earth breakers. However, such a contact device is large in size and has a problem in that the inserted contactor must be pulled out one by one when performing a short circuit for maintenance.

In embodiments, a gas insulated switchgear contact device includes a pair of body portions, separators, and couplings. The pair of body parts are symmetrical with each other and, when combined, form a hollow cylinder. The separating part is tightly coupled to the inner surface of the pair of body parts to separate the internal space of the pair of body parts. The coupling portion secures the pair of body portions and separation portions.

In one embodiment, the body portion and the separation portion may be formed of a conductive metal conductive.

In one embodiment, the coupling portion may be a pair of coupling bolts coupled with the pair of body portions and separation portions.

In one embodiment, the pair of body portion may be formed to be spaced apart from each other by a predetermined distance or more when combined.

In one embodiment, the pair of body portion may have a protruding edge or groove that can secure the separator.

In one embodiment, the pair of body portions may comprise rounded corners forming an inlet of the hollow cylinder.

1 is a cross-sectional view according to an embodiment of a gas insulated switchgear.
2 is a cross-sectional view of a general contact used in the track disconnector.
3 is a perspective view of one embodiment of a contact device for a gas insulated switchgear according to the disclosed technology.
4 is an exploded perspective view of the contact device of FIG. 3.
5 is a cross-sectional view taken along the AA ′ direction of the contact device of FIG. 3.
FIG. 6 is a sectional view taken along the line BB ′ of the contact device of FIG. 3 with an insertion contact inserted therein. FIG.

The description of the disclosed technique is merely an example for structural or functional explanation and the scope of the disclosed technology should not be construed as being limited by the embodiments described in the text. That is, the embodiments may be variously modified and may have various forms, and thus the scope of the disclosed technology should be understood to include equivalents capable of realizing the technical idea.

Meanwhile, the meaning of the terms described in the present application should be understood as follows.

The terms "first "," second ", and the like are intended to distinguish one element from another, and the scope of the right should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It should be understood that the term "and / or" includes all possible combinations from one or more related items. For example, the meaning of "first item, second item and / or third item" may be presented from two or more of the first, second or third items as well as the first, second or third item It means a combination of all the items that can be.

It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, but there may be other elements in between. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions describing the relationship between the components, such as "between" and "immediately between" or "neighboring to" and "directly neighboring to", should be interpreted as well.

It should be understood that the singular " include "or" have "are to be construed as including a stated feature, number, step, operation, component, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

In each step, the identification code (e.g., a, b, c, etc.) is used for convenience of explanation, the identification code does not describe the order of each step, Unless otherwise stated, it may occur differently from the stated order. That is, each step may occur in the same order as described, may be performed substantially concurrently, or may be performed in reverse order.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. Commonly used predefined terms should be interpreted to be consistent with the meanings in the context of the related art and can not be interpreted as having ideal or overly formal meaning unless explicitly defined in the present application.

1 is a cross-sectional view according to an embodiment of a gas insulated switchgear.

Referring to Figure 1, the gas insulated switchgear busbar 110, busbar disconnector 120, current transformer 130, breaker 140, repair grounding switch 150, line disconnector 160, for the line The ground switch 170 and the bushing 180 may be accommodated in the grounded metal housing and connected to each other, and a line may be formed through a conductor passing through each unit. Here, the gas insulated switchgear may be used as an insulating medium by filling an insulating gas having excellent insulation and extinguishing performance, such as SF6 gas.

The bus bar 110 is a main path through which electric power to be transmitted flows.

The bus disconnector 120 may disconnect a circuit from the bus 110 to the current transformer 130 to close the circuit in the no-load state.

The current transformer 130 may rectify the current flowing from the bus line 110.

The circuit breaker 140 may momentarily operate to cut off a current when an error occurs in the circuit. By the operation of the breaker 140, the converter or the main device can be protected.

The repair ground switch 150 is a mechanical switchgear for grounding the converter in abnormal conditions.

The line disconnector 160 may open or close the no-load circuit for completely removing the electrostatic part with a power supply or switching the water substation facility during the inspection and repair of the device.

The disconnector 120, the breaker 140, and the ground switch 150 of the gas insulated switchgear may be disconnected or grounded using various contact devices. Hereinafter, a gas insulated switchgear contact device will be described with reference to FIGS. 2 to 6.

2 is a cross-sectional view of a general contact device used in a gas insulated switchgear.

Referring to FIG. 2, the contact device may include a conductor unit 210, a contact unit 220, a shield unit 230, and a spring contact unit 240. In one embodiment, the spring contact portion 240 may be replaced by a finger and a spring portion.

The conductor part 210 is a conductive conductor, one end of which may be connected to the contact part 220 and the other end of which may be connected to the bushing.

A portion of the inner surface of the contact portion 220 may be in contact with the spring contact portion 240 by contacting, and an extended portion of the outer surface may be connected to a portion of the shield portion 230.

The shield portion 230 may be connected to an extended portion of the outer surface of the contact portion 220 and may be spaced apart from the remaining outer surface. The distal end of the shield 230 may have a streamlined curved shape to prevent the arc from occurring.

The spring contact part 240 may be fixed by being embedded in a part of the inner surface of the contact part 220, and may be in contact with a conductor that enters the inside of the contact part 220.

The contact device shown in FIG. 2 is formed by assembling them after the conductor portion 210, the contact portion 220, and the shield portion 240 are made of components, respectively, and thus have low durability and are easily broken or broken. There is a problem. In addition, there is a disadvantage in that the volume of the contact device itself becomes large and accordingly the volume of the gas insulated switchgear increases.

3 is a perspective view of one embodiment of a contact device for a gas insulated switchgear according to the disclosed technology, and FIG. 4 is an exploded perspective view of the contact device of FIG. 3. 5 is a cross-sectional view taken along the line AA ′ of the contact device of FIG. 3.

3 to 5, the contact device may include a pair of body part 310, a separation part 320, and a coupling part 330.

The pair of body parts 310 may form a hollow cylindrical shape when they are symmetrical and coupled to each other. As shown in FIG. 3, in the coupled contact device, a pair of body parts 310 may be spaced apart from each other by a predetermined distance. Such a pair of body portion 310 has such a separation, it is possible to solve the resistance of the gas due to the close contact when the insertion contact is inserted into the combined body portion 310.

In one embodiment, the corner of the cylindrical inlet of the pair of body portion 310 may be rounded. The rounded corners can prevent arcing from occurring when the insertion contact is inserted.

Separation unit 320 may be coupled in close contact with the inner surface of the pair of body portion 310 to separate the internal space of the body portion 310.

In one embodiment, each of the pair of body portion 310 may be provided with a protruding edge or groove that can be in contact with the separating portion 320 to secure the separating portion 320. 3 to 6, but a pair of body portion 310 has a protruding edge, on the contrary, a pair of body portion 310 may be provided with a groove that can be fixed by the separation unit 320 is fitted have.

In one embodiment, the separator 320 may be integrally configured with any one of the pair of body portions 310.

Coupling portion 330 may be fixed by combining a pair of body portion 310 and the separating portion 320.

 In one embodiment, as shown, the coupling portion 330 may be composed of a pair of coupling bolts. In another embodiment, the coupling portion 330 may be coupled through a pair of body portion 310 and the separating portion 320 as a bolt and nut pair.

In the disclosed contact device, the pair of body portions 310 and separators 320 are preferably configured as conductive metals. However, according to the embodiment, any one of the pair of body part 310 or the separating part 320 may be configured as a non-conductive non-conductor. For example, if the pair of body portions 310 is configured as a conductor and the separation portion 320 is configured as a non-conductor, it is possible to prevent loss due to electrical sparks (arks) when insertion contacts are inserted into the coupled contact device. Can be.

6 is a cross-sectional view in the B-B 'direction of the contact device of FIG. 3 with an insertion contact inserted therein.

As shown in FIG. 5, the insertion contacts 340 may be in contact with and energize the pair of body portions 310.

Although the illustrated embodiment illustrates that the insertion contacts 340 are energized through the pair of body parts 310, in another embodiment, the insertion contacts 340 may be energized through the separation part 320. In other words, the separating part 320 may be configured to protrude from the edge of the pair of body parts 310, and the insertion contacts 340 may be in contact with the separating part 320 to conduct electricity. In another embodiment, the insertion contacts 340 may be in contact with and energize both the pair of body portion 310 and the separation portion 320.

The disclosed technique may have the following effects. It is to be understood, however, that the scope of the disclosed technology is not to be construed as limited thereby, as it is not meant to imply that a particular embodiment should include all of the following effects or only the following effects.

Using a contact device according to an embodiment can reduce the volume of the gas insulated switchgear. Because the size of the contact device is small because it can be used to reduce the size of the disconnector 120, the breaker 140, the ground breaker 150, and the like.

In addition, the use of a contact device according to an embodiment may facilitate maintenance of the gas insulated switchgear. This is because the contact device is detachable in shape so that maintenance is very easy.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit and scope of the present invention as set forth in the following claims It can be understood that

110: busbar 120: busbar disconnector
130: current transformer 140: breaker
150: repairing ground breaker 160: line disconnector
170: line grounding switch 180: bushing
210: conductor portion 220: contact portion
230: shield portion 240: spring contact portion
310: body portion 320: separation part
330: coupling portion 340: insertion contact

Claims (6)

A pair of body parts symmetrical with each other and combined to form a hollow cylinder;
A separation part that is closely coupled to an inner surface of the pair of body parts to separate an inner space of the pair of body parts; And
A contact device for a gas insulated switchgear comprising a coupling portion for fixing the pair of body portions and separation portions.
The method of claim 1, wherein the body portion and the separating portion
A contact device for a gas insulated switchgear, characterized by being formed of a conductive metal having conductivity.
The method of claim 1, wherein the coupling portion
And a pair of coupling bolts for coupling with the pair of body portions and separation portions.
The method of claim 1, wherein the pair of body portion
Contact device for a gas insulated switchgear, characterized in that the coupling is formed to be spaced apart from each other by a predetermined distance or more.
The method of claim 1, wherein the pair of body portion
And a protruding edge or a groove capable of fixing the separation part.
The method of claim 1, wherein the pair of body portion
And a rounded corner forming the inlet of the hollow cylinder.

Images