KR20140008133A

KR20140008133A - Gas insulated switchgear

Info

Publication number: KR20140008133A
Application number: KR1020120075279A
Authority: KR
Inventors: 이동훈
Original assignee: 현대중공업 주식회사
Priority date: 2012-07-10
Filing date: 2012-07-10
Publication date: 2014-01-21

Abstract

A gas insulated switchgear according to the present invention includes: a fixed contact unit which includes a fixed arc contact member and a fixed main contact member which is separated from the fixed arc contact member; a movable arc contact member which receives the fixed arc contact member; a movable main contact member in contact with the fixed main contact member; a movable contact member which includes a cylindrical movable shaft which is combined with the movable arc contact member and an insulation rod which is extended from the movable shaft; and a movable conductor unit which includes a shielding member which is separated from the insulation rod. The gas insulated switchgear prevents a ground fault due to the contact with the insulation rod in the discharge process of the heated insulation gas by including the shielding member.

Description

[0001] GAS INSULATED SWITCHGEAR [0002]

The present invention relates to a gas insulated switchgear, and more particularly, a shield member provided on the movable side conductor to prevent contact between a high temperature insulating gas and an insulating rod extending to the rear of the movable shaft to prevent a ground fault. It relates to an insulated switchgear.

Generally, Gas Insulated Switchgear is used to open and close circuit breakers, disconnectors, transformers, lightning arresters, and main circuit buses in a metal tank, and the live parts are supported by solid insulators. It is an opening / closing system that is filled and sealed with SF6 gas, which is excellent in ability, as an insulation medium. In this case, the circuit breaker operates current momentarily even when the circuit is abnormal, and protects the main circuit and the main device. If the fault current flows for a long time, it will exceed the allowable current of the current, so that the transformer winding present in the converter may burn, melt, or be destroyed. Such a circuit breaker has a problem that a ground fault may occur in contact with the insulating rod because the breaker discharges the heated insulating gas in the advancing direction of the movable shaft.

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. The opening and closing device of the gas insulated circuit breaker (GCB) according to the present invention is connected to a fixed side contactor device having a fixed cylinder, a first movable arc contactor movable within the fixed cylinder, and an external power source to transmit power. And a second movable arc connected to the power transmission mechanism and movable to a position contacting the first movable arc contact by power from the power transmission mechanism and a position away from the first movable arc contact. A movable contactor device having one contactor, a nozzle connected to the power transmission device, movable in the same direction as the moving direction of the power transmission device, and injecting arc extinguishing gas when an arc is generated, and one end of which is connected to the nozzle of the movable contactor device; The other end is connected to a first movable arc contactor of the fixed side contactor device, 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 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 power.

Korean Patent No. 10-1053351 Korean Patent No. 10-0618605

The present invention is provided with a shield member which is spaced apart from the insulating rod located behind the movable shaft and included in the movable side conductor portion, so that a gas insulation that prevents a ground fault caused by contacting the insulating rod when the heated insulating gas is discharged. To provide a switchgear.

In embodiments, a gas insulated switchgear may include a fixed arc contact member, a fixed main contact member spaced apart from the fixed arc contact member, and a fixed contact portion comprising: a movable arc contact member receiving the fixed arc contact member; A movable contact portion including a movable main contact member contacting the contact member, a movable shaft having a cylindrical shape coupled to the movable arc contact member, and an insulating rod extending behind the movable shaft, and a shield member spaced apart from the insulating rod. It includes a movable side conductor portion.

In one embodiment, the movable side conductor portion may surround the movable contact spaced apart.

In one embodiment, the movable contact may further include a nozzle member for discharging the insulating gas.

In one embodiment, the shield member may be connected to the movable contact to prevent contact between the high temperature insulating gas and the insulating rod.

The present invention is provided with a shield member which is spaced apart from the insulating rod located behind the movable shaft and included in the movable side conductor portion, so that a gas insulation that prevents a ground fault caused by contacting the insulating rod when the heated insulating gas is discharged. A switchgear can be provided.

1 is a view for explaining a gas insulated switchgear according to an embodiment of the present invention.
FIG. 2 is an enlarged view illustrating a shield member of the gas insulated switchgear of FIG. 1.

The description of the present invention is merely an example for structural or functional explanation, and the scope of the present invention should not be construed as being 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 invention should be understood as follows.

Terms such as "first" and "second" are intended to distinguish one component from another component, and the scope of rights 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. 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 invention.

1 is a view for explaining a gas insulated switchgear according to an embodiment of the present invention, Figure 2 is an enlarged view for explaining the shield member of the gas insulated switchgear in FIG.

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

The fixed contact unit 110, the movable contact unit 120, and the movable side conductor unit 130 are filled and sealed together using SF6 gas having excellent insulation performance and extinguishing capability as an insulation medium in an enclosure (not shown). In one embodiment, the stationary contact 110 and the movable contact 120 are normally energized and may operate momentarily when an abnormality occurs in the circuit to break the circuit. Blocking these circuits can protect the circuit and the main equipment.

The fixed contact portion 110 includes a fixed arc contact member 111 and a fixed main contact member 112 spaced apart from the fixed arc contact member 111.

The movable contact portion 120 includes a movable arc contact member 121 accommodating the fixed arc contact member 111, a movable main contact member 122 and a movable arc contact member 121 in contact with the fixed main contact member 112. The coupling includes a cylindrical movable shaft 124 and the insulating rod 125 extending behind the movable shaft 124. In one embodiment, the movable contact portion 120 may further include a nozzle member 126 for discharging the insulating gas and a papper 123 for filling the SF6.

The movable side conductor part 130 includes a shield member 131 positioned to be spaced apart from the insulating rod 125. In one embodiment, the movable side conductor portion 130 may wrap the movable contact portion 120 spaced apart.

In one embodiment, the shield member 131 is connected to the movable contact portion 120 to prevent contact between the high temperature insulating gas and the insulating rod 125 to contact the insulating rod 125 when the high temperature insulating gas is discharged. This prevents ground faults.

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

110: fixed contact
111: fixed arc contact member 112: fixed main contact member
120: movable contact
121: movable arc contact member 122: movable main contact member
123: popper seal 124: movable shaft
125: insulated rod 126: nozzle member
130: movable side conductor portion 131: shield member

Claims

A fixed contact 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 accommodating the fixed arc contact member, a movable main contact member contacting the fixed main contact member, a cylindrical movable shaft coupled to the movable arc contact member, and an insulating rod extending behind the movable shaft; A movable contact comprising; And
A gas insulated switchgear including a movable side conductor portion including a shield member spaced apart from the insulating rod.

The method of claim 1, wherein the movable side conductor portion
Gas insulated switchgear, characterized in that for wrapping the movable contact spaced apart.

The method of claim 1, wherein the movable contact portion
The gas insulated switchgear further comprising a nozzle member for discharging the insulating gas and a papillae for filling the insulating gas.

The method of claim 1, wherein the shield member
The gas insulated switchgear is connected to the movable contact portion to prevent contact between the high temperature insulating gas and the insulating rod.