KR101291789B1 - Gas insulated switchgear - Google Patents

Abstract

The present invention relates to a gas insulated switchgear, comprising: a fixed contact portion including a fixed arc contact member and a fixed main contact member spaced apart from the fixed arc contact member, a movable arc contact member for receiving the fixed arc contact member, and the fixed main A movable contact including a movable main contact member in contact with the contact member, a movable side conductor portion surrounding the movable contact portion and the fixed contact portion and the movable side conductor portion have inner ends facing and flattened with each other, It includes a plurality of cooling members coupled and thermally conductive and forming an outer wall. According to the present invention, the high temperature insulating gas is sufficiently cooled in the fixed contact portion and the movable side conductor portion to be discharged to the outside, thereby preventing short circuit or ground fault between phases, thereby preventing breakdown.

Description

[0001] GAS INSULATED SWITCHGEAR [0002]

The present invention relates to a gas insulated switchgear, and more particularly, in a structure for discharging a high temperature insulating gas heated by an arc generated inside the fixed contact and the movable contact when opening and closing the breaker, the high temperature insulating gas is The present invention relates to a gas insulated switchgear that can be cooled inside the fixed contact portion and the movable side conductor portion and discharged to the outside, thereby preventing the insulation performance from deteriorating due to high temperature and preventing the breakdown.

In general, gas insulated switchgear is equipped with a solid insulator in which the opening and closing facilities such as breakers and disconnectors, transformers, lightning arresters, and main circuit busbars are collectively stored in a metal tank. It is an opening / closing system that is filled and sealed using SF6 gas with excellent ability as an insulating medium. In this case, the breaker keeps current flowing through the current and protects the converter and the main equipment by operating instantaneously when an error occurs in the circuit. This is because if the fault current flows for a long time in case of abnormality, the allowable current of the current may be far exceeded, which may lead to an accident in which a transformer winding, etc. existing in the converter burns, melts and ruptures.

Korean Patent No. 10-0182773 is applied to a gas insulated circuit breaker of the PUFFER type, when the movable electrode is separated from the fixed electrode, to be injected toward the arc to extinguish the arc in which the insulating gas is generated. An insulating nozzle is provided to direct the gas toward the arc and to form a gas flow passage with an insulating cover covering the movable electrode. The insulating cover is formed of an insulating material including a filler to prevent energy rays of the arc from entering the cover. In addition, the insulation cover has a dielectric constant greater than the dielectric constant of the insulation nozzle in order to reduce the electric field strength of the residual electrode electrode.

Korean Patent No. 10-1053351 discloses a new type of gas that distinguishes the space between a compression chamber and a heat chamber, and secures operational reliability through structural improvement of a popper cylinder supporting a mover pipe and a reverse displacement installed therein. The present invention relates to an insulation switchgear (GIS). To this end, the gas insulated switchgear of the disclosed technology is formed in the form of a hollow pipe, the inner center portion is a popper cylinder in which the mover pipe is installed along the axial direction, and the space in the popper cylinder is divided into a compression chamber and a heat chamber. In the center portion, a through hole through which the mover pipe is formed is formed, and on the wall surface of the compression chamber side of the peripheral portion, a seating groove communicating with the space in the compression chamber is formed in the circumferential direction, the peripheral portion On the wall surface of the heat chamber side, a valve bundle portion through which a main communication hole and a bypass hole communicate with a space in the seating groove and a space in the heat chamber, respectively, and the seating groove is formed in a state of being seated in the seating groove of the valve bundle. Ring-type reverse station for selectively opening and closing the main communication hole or bypass hole while being installed to move along the direction Side, and as installed on the side of the compression chamber, said valve assembly wall portion support guide for preventing the detachment of the ring-like disasters station: characterized by consisting of a.

Korean Patent No. 10-0618605 relates to an opening and closing device of a gas insulated circuit breaker (GCB), wherein the fixed arc contactor and the movable arc contactor are movable in opposite directions when the breaker is operated, The energy acts as a driving energy added to the movable arc contactor in a direction to be separated from the fixed arc contactor, thereby reducing the driving energy required for the circuit breaking operation and improving the breaking performance. To this end, the opening and closing device of the gas insulated-circuit breaker (GCB) according to the present invention comprises a stationary-side contactor device having a stationary cylinder and a first movable arc contactor movable in the stationary cylinder, And a second movable arc movable member which is connected to the power transmission mechanism and is movable to a position where the first movable arc contact member is in contact with the first movable arc contactor by a power from the power transmission mechanism, And a nozzle connected to the power transmission mechanism and movable in the same direction as the movement direction of the power transmission mechanism and injecting the soot gas when an arc is generated, and one end of the movable contactor is connected to a nozzle of the movable contactor And the other end is connected to the first movable arc contact of the fixed contact device, and when the circuit is interrupted Power is applied to the first movable arc contact to move in a direction away from the second movable arc contact, and when the circuit is connected, power is applied to the first movable arc contact to move in a direction approaching the second movable arc contact. It characterized in that it comprises a link mechanism for transmitting.

Korea Patent Registration No. 10-0182773 Korean Patent No. 10-1053351 Korean Patent No. 10-0618605

One embodiment of the present invention is to provide a gas insulated switchgear that allows the hot insulating gas to be released to the outside after the cooling of the high-temperature insulating gas inside the fixed contact portion and the movable side conductor portion.

An embodiment of the present invention is to provide a gas insulation switchgear to prevent the insulation breakdown by preventing the insulation gas is cooled inside the fixed contact portion and the movable side conductor portion to prevent a short circuit between the phases or earth ground.

In embodiments, a gas insulated switchgear includes a fixed contact portion including a fixed arc contact member and a fixed main contact member spaced apart from the fixed arc contact member, and a movable arc contact member for receiving the fixed arc contact member, the fixed main contact. A movable contact including a movable main contact member in contact with the member and a movable side conductor portion surrounding the movable contact portion and the fixed contact portion and the movable side conductor portion have inner ends facing and flattened with each other and coupled to the vicinity of the end; And a plurality of cooling members having thermal conductivity and constituting the outer wall.

In one embodiment, the fixed contact portion forms a bent interior to provide a flow path of heated insulation gas during contact between the fixed arc contact member and the movable arc contact member, wherein the bent interior is the fixed arc contact. Is formed from the vicinity of the member to the vicinity of the fixed main contact member via one of the plurality of cooling members, the vicinity of the fixed arc contact member corresponds to the upper end of the fixed arc contact member, the vicinity of the fixed main contact member is fixed It may correspond to the lower end of the main contact member.

In one embodiment, the movable contact portion further comprises a movable shaft coupled with the movable arc contact member, the movable shaft is configured in a cylindrical shape and further comprises a hole for discharging the heated insulating gas to the outside, the movable The contact part may further include an insulating rod connected to the movable shaft, and further include a screen surrounding the movable shaft and the insulating rod to be spaced apart from each other to prevent breakdown from the high temperature insulating gas.

In one embodiment, the movable side conductor portion may provide a flow path of the heated insulating gas discharged through the movable shaft through a gap spaced from the movable contact portion.

The gas insulated switchgear according to an embodiment of the present invention allows the high temperature insulation gas to be discharged to the outside after the cooling is sufficiently performed in the fixed contact portion and the movable side conductor portion.

In the gas insulation switchgear according to an embodiment of the present invention, the insulation gas is cooled inside the fixed contact portion and the movable side conductor to prevent short circuit or ground fault between phases, thereby preventing breakdown.

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

Description of the present invention is only an embodiment for structural or functional description, the scope of the present invention should not be construed as limited by the embodiments described in the text. That is, the embodiments are to be construed as being variously embodied and having various forms, so that the scope of the present invention should be understood to include equivalents capable of realizing technical ideas. Also, the purpose or effect of the present invention should not be construed as limiting the scope of the present invention, since it does not mean that a specific embodiment should include all or only such effect.

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 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.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. The terms defined in the commonly used dictionary should be interpreted to coincide with the meanings 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 cross-sectional view illustrating a gas insulated switchgear according to an embodiment of the present invention.

Referring to FIG. 1, the gas insulated switchgear 100 includes a fixed contact part 110, a movable contact part 120, and a movable side conductor part 130.

The fixed contact portion 110, the movable contact portion 120, and the movable side conductor portions 130 are filled and sealed together with SF6 gas having excellent insulation performance and extinguishing ability as an insulating medium in the tank. In one embodiment, the stationary and movable contacts 110, 120 are energized normally and operate momentarily when an abnormality occurs in the circuit, breaking the circuit. Blocking these circuits can protect the circuit and the main equipment. In one embodiment, the stationary contact 110 and the movable side conductor 130 have inner ends that are configured to face each other and are flat. In addition, the fixed contact portion 110 and the movable side conductor portion 130 include a plurality of cooling members 114 and 131 coupled to each inner end and forming an outer wall. The plurality of cooling members 114 and 131 may have higher thermal conductivity than the fixed contact portion 110 and the movable side conductor portion 130.

The fixed contact 110 includes a fixed arc contact member 111 and a fixed main contact member 112 spaced apart from the fixed arc contact member 111. In one embodiment, the fixed contact 110 is composed of a cylindrical conductor, the end may have a closed shape. The interior of the closed shape may be configured flat. In one embodiment, the stationary contact 110 further includes a stationary side cooling member 114 coupled near the flat inner end to form an outer wall. The fixed side cooling member 114 may have a higher thermal conductivity than the fixed contact portion 110.

The fixed contact 110 forms a bent interior 113. In one embodiment, the bent interior 113 may be formed from the vicinity of the fixed arc contact member to the vicinity of the fixed main contact member via one of the plurality of cooling members. In one embodiment, the vicinity of the fixed arc contact member 111 may correspond to the top of the fixed arc contact member 111, and the vicinity of the fixed main contact member 112 may correspond to the bottom of the fixed main contact member 112. .

In one embodiment, the fixed arc contact member 111 may be centrally located within the fixed contact portion 110, may be configured in a circumferential shape, and the ends may be rounded in a hemispherical shape.

The movable contact portion 120 includes a movable arc contact member 121 for receiving the fixed arc contact member 111 and a movable main contact member 122 for contacting the fixed main contact member 112. In one embodiment, the movable contact portion 120 further includes a movable shaft 123 coupled with the movable arc contact member 121. The movable shaft 123 is configured in a cylindrical shape, the cylinder shape provides a flow path of the heated insulating gas. The movable shaft 123 may further include a movable shaft hole 124 for emitting the flowing insulating gas to the outside. In one embodiment, the movable contact portion 120 further includes an insulating rod 125 connected with the movable shaft 123. In addition, the movable contact portion 120 further includes a screen 126 that surrounds the movable shaft 123 and the insulating rod 125 spaced apart. The screen 126 may prevent breakdown of the movable shaft 123 and the insulating rod 125 from the high temperature insulating gas emitted from the movable shaft hole 124.

The movable side conductor portion 130 is configured in a shape to surround the movable contact portion 120 spaced apart. In addition, one end of the movable side conductor portion 130 has a flat inner shape that opposes the flat inner end of the fixed contact portion 110. In one embodiment, the movable side conductor portion 130 may further include a movable side cooling member 131 coupled near the flat inner end and extending in the direction of the movable arc contact member 121. In one embodiment, the movable side conductor portion 130 may provide a flow path of the insulating gas in a gap spaced apart from the movable contact portion 120.

The gas insulated switchgear 100 operates instantaneously when an abnormality occurs in a circuit to cut off the circuit. In this blocking process, an arc is generated between the fixed arc contact member 111 and the movable arc contact member 121. The arc heats the insulation gas filled in the gas insulation switchgear 100. The heated insulation gas flows outward from the center of the arc.

At this time, the hot insulating gas flowing in the direction of the fixed contact portion 110 generates a vortex at the flat inner end. Vortex generated insulated gas stays near the flat inner end and slowly flows outward through the fixed side cooling member 114. The insulating gas flows through the fixed side cooling member 114 to the fixed main contact member 112 and may be gradually cooled and discharged to the outside.

On the other hand, the high temperature insulating gas flowing in the direction of the movable contact portion 120 flows along the inside of the movable shaft 123 and is discharged into the movable side conductor portion 130 through the movable shaft hole 124. The high temperature insulating gas discharged to the movable side conductor part 130 generates a vortex at the flat inner end. The vortex generated insulation gas stays near the flat inner end and slowly flows through the outer movable side cooling members 131. The insulating gas flows toward the movable main contact member 120 through the movable side cooling members 131 and may be gradually cooled and discharged to the outside.

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 invention described in the claims below I can understand that you can.

110: fixed contact 111: fixed arc contact member
112: fixed main contact member 113: bent interior
114: stationary side cooling member 120: movable contact portion
121: movable arc contact member 122: movable main contact member
123: movable shaft 124: movable shaft hole
125: insulated rod 130: movable side conductor portion
131: movable side cooling member

Claims (9)

A fixed contact comprising a fixed arc contact member and a fixed main contact member spaced apart from the fixed arc contact member;
A movable contact including a movable arc contact member for receiving the fixed arc contact member and a movable main contact member for contacting the fixed main contact member;
A movable side conductor part surrounding the movable contact part spaced apart; And
Each of the fixed contact portion and the movable side conductor portion includes an inner end and a plurality of cooling members;
Each of the inner ends is flat and positioned to face each other and delays the discharge time of the hot gas,
The plurality of cooling members are coupled to the inner end, the gas insulated switchgear having a thermal conductivity and constitutes an outer wall.
The connector according to claim 1, wherein the fixed contact
And forming a bent interior to provide a flow path of the insulating gas heated during contact between the fixed arc contact member and the movable arc contact member.
The method of claim 2, wherein the bent interior is
And from the vicinity of the fixed arc contact member to the vicinity of the fixed main contact member via one of the plurality of cooling members.
The method of claim 3, wherein the vicinity of the fixed arc contact member
Gas insulated switchgear, characterized in that corresponding to the upper end of the fixed arc contact member.
The method of claim 3, wherein the vicinity of the fixed main contact member
Gas insulated switchgear, characterized in that corresponding to the lower end of the fixed main contact member.
The method of claim 2, wherein the fixed contact portion
Insulating gas moving near the fixed arc contact member guides the fixed main contact member through the flat inner end and the plurality of cooling members, and cools and discharges the moved insulating gas. Device.
The connector according to claim 1, wherein the movable contact portion
A movable shaft coupled with the movable arc contact member;
The movable shaft has a cylindrical shape, and further comprises a hole for discharging the insulating gas heated in the process of contacting the fixed arc contact member and the movable arc contact member to the outside.
8. The method of claim 7, wherein the movable contact is
And an insulating rod connected to the movable shaft, and further comprising a screen surrounding the movable shaft and the insulating rod to be spaced apart from each other to prevent breakdown from high temperature insulating gas.
The method of claim 7, wherein the movable side conductor portion
And a flow path of the insulation gas heated during the contact between the fixed arc contact member and the movable arc contact member that is discharged through the movable shaft through a gap spaced apart from the movable contact portion.

Images