KR20120127844A - Gas-insulated switchgear - Google Patents

Abstract

PURPOSE: A gas insulated switchgear is provided to reduce overall size by forming a three-phase state by allowing a movable contact to reciprocate between two fixed conductors. CONSTITUTION: An enclosure(110) comprises a shaft(140) and first to third fixed conductors(120,130,170). The second fixed conductor is spaced from the first fixed conductor. The shaft forms an axis(600) inside the enclosure. A movable member(150) is moved along the shaft. A movable contact(160) moves between the first and second fixed conductors. The third fixed conductor is spaced from the shaft. The third fixed conductor can be electrically connected to the movable contact regardless of the movement of the movable member.

Description

Gas Insulated Switchgear {GAS-INSULATED SWITCHGEAR}

The disclosed technique relates to a gas insulated switchgear, and more particularly, to a gas insulated switchgear that implements a three-phase switch using axial movement.

In general, Gas Insulated Switchgear (GIS) is a mechanism that performs the opening / closing mission to cut off the current when an accident current occurs.The circuit breaker, disconnector, grounding switch, instrument current transformer and busbar are built into a grounded metal tank. It is a product filled with SF ₆ gas with excellent insulation and extinguishing characteristics. It is a power switchgear with advantages such as miniaturization of substation, improvement of safety and reliability, easy operation and maintenance, and harmony with environment. There are two phase switch and three phase switch for gas insulated switchgear. Many gas insulated switchgear have been developed to implement a three phase switch which is easier, safer and takes up less space.

Among the embodiments, the gas insulated switchgear includes an enclosure, first and second high conductors spaced apart, a shaft defining an interior of the enclosure and spaced apart from the first and second high conductors. And a movable member coupled to the shaft and movable along the shaft, and a movable contact coupled to the movable member and moving between the first and second fixed conductors (including respective couplings).

In one embodiment, the shaft may form a thread in the moving section of the moving member. In one embodiment, the moving member is inserted into the shaft, it may form a groove corresponding to the thread therein. In one embodiment, it may further comprise a third high conductor disposed spaced apart from the shaft and electrically connected to the movable contact regardless of the movement of the movable member. In one embodiment, the distal end of the movable contact (part in contact with the first and second high conductors) may be welded or fastened with a part made of a material that withstands arc.

1 is a perspective view showing a gas insulated switchgear according to an embodiment of the disclosed technology.
FIG. 2 is a cross-sectional view illustrating a first state of the gas insulated switchgear of FIG. 1.
3 is a cross-sectional view illustrating a second state of the gas insulated switchgear of FIG. 1.

Description of the present application is only an embodiment for structural or functional description, the scope of the disclosed technology should not be construed as 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 named a second component, and similarly, the second component may also be named a first component.

When a component is referred to as being "connected" to another component, it should be understood that there may be other components in between, although it may be directly connected to the other component. On the other hand, when a component is said to be "directly connected" to another component, it should be understood that the other component does not exist. On the other hand, other expressions describing the relationship between the components, such as "between" and "immediately between" or "neighboring to" and "directly neighboring", 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.

Unless otherwise defined, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the disclosed technology belongs. Generally, the terms defined in the dictionary used are to be interpreted as being consistent with the meaning in the context of the related art, and should not be interpreted as having ideal or excessively formal meanings unless clearly defined in the present application.

1 is a perspective view showing a gas insulated switchgear according to an embodiment of the disclosed technology.

Referring to FIG. 1, the gas insulated switchgear 100 includes an enclosure 110, first and second high conductors 120 and 130, a shaft 140, a moving member 150, and a movable contactor. 160 and the third high conductor 170.

The enclosure 110 is a structure that may include first, second, and third high conductors 120, 130, and 170 which may be connected to the main line, the bus bar, and the ground terminal from the shaft 140 and the outside.

The first high conductor 120 may be disposed inside one side of the enclosure 110. The first high conductor 120 may be connected to the bus bar to conduct current. In one embodiment, the first high conductor 120 is bent in a 'b' shape, the groove may be formed in one end of the bent or a connector may be coupled.

The second high conductor 130 may be spaced apart from the first high conductor 120. The second high conductor 130 may be connected to the ground terminal to receive a current from the third high conductor 170 when the system is grounded. In one embodiment, the second high conductor 130 may be provided with a groove at one end or a connector.

The shaft 140 may form an axis 600 in the enclosure 110 and be spaced apart from the first and second high conductors 120 and 130. In one embodiment, the shaft 140 may be provided with a thread in the moving section of the moving member 150, the thread may move the moving member 150 through the rotation of the shaft 140. The shaft 140 may be rotated through a mechanical connection at the outside of the enclosure 110. The shaft 600 may be parallel to a straight line in which the first and second high conductors 120 and 130 are disposed.

The moving member 150 may be coupled to the shaft 140 to move along the shaft 140. In one embodiment, the moving member 150 may be composed of a non-conductor of a shape surrounding the shaft 140 in the form of a ring, it is possible to couple the movable contact 160 to one end. The moving member 150 may have a groove corresponding to a thread of the shaft 140 on an inner surface thereof. The thread of the shaft 140 is inserted into the groove of the movable member 150 to linearly move the movable member 150 according to the rotation of the shaft 140.

The movable contact 160 is coupled to the movable member 150 and may move between the first and second fixed conductors 120 and 130. In one embodiment, the overall skeleton of the movable contact 160 may be cylindrical in consideration of contact resistance, high voltage, and high current. One end of the movable contact 160 may be configured in a 'T' shape, the other end may be bent in a 'b' shape. In more detail, the movable contact 160 and the first and second high conductors 120 and 130 may be coupled using a protrusion (for example, a T shape) and a groove (for example, a fin shape). In one embodiment, the movable contact 160 may move between the first and second high conductors 120, 130 and engage with the first or second high conductors 120, 130, or with either of them. You can't. 1 illustrates a case in which the movable contact 160 is not coupled with any of the first and second high conductors 120 and 130, and the gas insulated switchgear 100 may have a disconnected state. .

The third high conductor 170 may be spaced apart from the shaft 140 and electrically connected to the movable contact 160 regardless of the movement of the movable member 150. In one embodiment, the third high conductor 170 may be inserted into one end of the movable contact 160 by forming a deep groove in the portion coupled with the moving member 150. Here, the movable contact 160 may be linearly moved while inserting the bent end into the groove of the third high conductor 170.

The third high conductor 170 may have a groove extending in the longitudinal direction of the shaft 140 to support linear movement of the moving member 150. The third high conductor 170 may be connected to the main line and receive current from the first high conductor 120 when the current is in a normal state, and send the current to the third high conductor 170 when the ground is in the ground state.

FIG. 2 is a cross-sectional view illustrating a first state of the gas insulated switchgear of FIG. 1. Here, the illustrated first state is a state in which the movable contact 160 is coupled with the first high conductor 120.

Referring to FIG. 2, when the shaft 140 is rotated in one direction, the movable contact 160 coupled with the shaft 140 may move upward under the rotational force. When the movable contact 160 moves upward, the movable contact 160 may be coupled to the first high conductor 120.

The gas insulated switchgear shown in FIG. 2 represents a normal state, and the current enters the first high conductor 120 from the power transmission unit, and the third high conductor 170 through the movable contact 160 and the moving member 150. Flows into. In one embodiment, the first and third high conductors 120 and 170 may constitute a disconnector. For example, the first high conductor 120 may be connected to the bus bar, and the third high conductor 170 may be connected to the main line. Here, in the operation as shown in FIG. 1, it may be disconnected (disconnected state) and energized (normal state) in the operation as shown in FIG.

3 is a cross-sectional view illustrating a second state of the gas insulated switchgear of FIG. 1. Here, the illustrated second state is a state in which the movable contact 160 is coupled with the second high conductor 130.

Referring to FIG. 3, when the shaft 140 is rotated to the other side, the movable contact 160 coupled to the shaft 140 may move downward under the rotational force. When the movable contact 160 moves downward, the movable contact 160 may be coupled to the second high conductor 120.

The gas insulated switchgear shown in FIG. 2 represents a ground state, and current flows from the third high conductor 170 to the second high conductor 130 through the moving member 150 and the movable contact 160. In one embodiment, the second and third high conductors 130 and 170 may constitute a ground breaker. For example, the second high conductor 130 may be connected to the ground terminal, and the third high conductor 170 may be connected to the main line. Here, in the operation as shown in FIG. 1, it may be disconnected (disconnected state), and in the operation as shown in FIG. 3, it may be grounded (grounded).

In one embodiment, the ends (parts in contact with the first and second high conductors 120, 130) of the movable contact 160 may be welded or fastened with a component made of an arc-resistant material. Parts made of an arc-resistant material may prevent damage of the contactor from the arc due to the high-voltage current when the movable contact 160 is separated from the first or second high conductor 120,130.

The disclosed technique may have the following effects. However, since a specific embodiment does not mean to include all of the following effects or only the following effects, it should not be understood that the scope of the disclosed technology is limited by this.

The gas insulated switchgear according to an embodiment may effectively implement a three-phase state. This is because the disclosed gas insulated switchgear is operated based on the shaft movement, so that the inside is simply configured.

Gas insulated switchgear according to an embodiment may be made smaller than the conventional gas insulated switchgear. This is because the disclosed gas insulated switchgear reciprocates between two high conductors to form a three-phase state, thereby miniaturizing the overall size.

Although described above with reference to the preferred embodiment of the present application, those skilled in the art various modifications and changes to the present application without departing from the spirit and scope of the present application described in the claims below I can understand that you can.

100: gas insulated switchgear 110: enclosure
120: first high conductor 130: second high conductor
140: shaft 150: moving member
160: movable contact 170: third high conductor
600: axis

Claims (5)

Enclosures;
First and second high conductors spaced apart from each other;
A shaft defining an interior of the enclosure and spaced apart from the first and second high conductors;
A moving member coupled to the shaft and movable along the shaft;
And a movable contact coupled to the moving member and moving between the first and second fixed conductors, wherein the first and second fixed conductors include respective couplings.
The method of claim 1, wherein the shaft
Gas insulated switchgear, characterized in that for forming a screw thread in the moving section of the moving member.
The method of claim 2, wherein the moving member
The gas insulated switchgear, which is inserted into the shaft and has a groove corresponding to the screw thread therein.
The method of claim 1,
And a third high conductor disposed spaced apart from the shaft and electrically connected to the movable contact irrespective of the movement of the movable member.
The method of claim 1,
The end of the movable contact (part in contact with the first and second high conductors) may be welded or fastened with a part made of a material that withstands an arc.

Images