KR20130102317A

KR20130102317A - Contact apparatus for gas insulated switchgear

Info

Publication number: KR20130102317A
Application number: KR1020120023466A
Authority: KR
Inventors: 정이식
Original assignee: 현대중공업 주식회사
Priority date: 2012-03-07
Filing date: 2012-03-07
Publication date: 2013-09-17

Abstract

PURPOSE: A contact device for a gas insulated switchgear is provided to reduce manufacturing costs and to prevent an arc by a guide unit which is made of teflon resins. CONSTITUTION: A fixed contact part includes a shield member (211) which forms a circumference hole and a fixed contact member (212) which is arranged along the inner side of a circumference hole. The fixed contact member receives a movable contact part through a spring member (214). A guide part (220) is located on a groove between the shield member and a guide support member (213). The guide part is protrusively extended to the upper side of the shield member and guides the movable contact part. The guide part is made of teflon resins. A base part (230) is located on the lower end of the shield member and supports the shield member and the fixed contact member.

Description

CONTACT APPARATUS FOR GAS INSULATED SWITCHGEAR}

The present invention relates to a gas insulated switchgear contact device, and more particularly, to a gas insulated switchgear contact device capable of making contact between a movable contact and a fixed contact while preventing an arc through a guide formed of a teflon resin. It is about.

Gas insulated switchgear is a power switchgear used in indoor and outdoor power plants and substations. It is a device that protects the power system appropriately by safely opening and closing the line in abnormal conditions such as power accidents and short circuits as well as opening and closing of normal situations under the use conditions. . The gas insulated switchgear is composed of a bus, a breaker, a repair ground switch, a current transformer, a line ground switch, a bushing and an operation box, and a contact device is used for electrical energization of each device. The contact device includes a guide part for guiding the mover and preventing an arc at the upper part connected with the mover. The contact part or shield of the contact device is made of copper and tungsten alloy and has a high manufacturing cost. There was a problem that wear occurs due to the arc generated at the time.

Korean Patent Laid-Open No. 10-2008-0112440 relates to a disconnector for a gas insulated switchgear, and more particularly, to improve the connection performance by improving the structure of a movable contact constituting the disconnector. The invention relates to a disconnector for a gas insulated switchgear comprising three movable contacts coupled to a link of a disconnector body to selectively conduct electricity while being selectively connected to three fixed contacts, wherein the three movable contacts are formed such that their opposing surfaces form a plane. Two blades of the plate type formed with a first through-hole bolted to the link of the disconnector body and a second through-hole for bolt coupling between each other; Fastening bolts and fastening nuts for coupling between the two blades; And, it is installed on the fastening bolt, and is compressed by the fastening force of the fastening bolt, the elastic member for maintaining the gap between the two blades: is configured to include, the elastic member is configured to provide different compression force according to the installation site A disconnector for a gas insulated switchgear is provided.

Korean Patent Publication No. 10-2011-0026762 discloses a new type of load opening / closing which allows the arc extinguishing performance to be improved, thereby improving the opening and closing performance, and minimizing the damage of the arc metal to extend the life of the product. It is about a dragon disconnector. The present invention includes a fixed part having a fixed cylinder and a fixed arc contactor fixed in the fixed cylinder, and a movable part for selectively performing connection or disconnection with the fixed part by the operation of the manipulator to perform a load switching operation. The movable part has a working space therein and a movable cylinder formed to be closed from the outside; A movable arc contactor which is connected to the fixed arc contactor of the fixed part while the front side portion is installed to be moved back and forth through the front surface of the movable cylinder and has an empty pipe body; A compression plate fixed to the circumferential surface of the movable arc contactor to move back and forth with the movable arc contactor to discharge the insulating gas inside the movable cylinder into the inner space of the movable arc contactor; And, coupled to the rear end of the movable arc contactor to provide a load disconnecting and disconnecting unit comprising: an operation unit for transmitting the operating force according to the operation of the manipulator to the movable arc contactor.

Korean Patent Publication No. 10-2008-0112440 Korean Patent Publication No. 10-2011-0026762

An object of the present invention is to provide a contact device for a gas insulated switchgear capable of making contact between a movable contact and a fixed contact while preventing an arc through a guide formed of a teflon resin.

The present invention is to provide a contact device for a gas insulated switchgear that can reduce the cost by using a guide portion of Teflon (teflon) resin without using a conventional tungsten material.

Among the embodiments, the contact device for the gas insulated switchgear is a fixed contact portion and a non-conductive material comprising a shield member for forming a circumferential hole and a fixed contact member disposed along the inside of the circumferential hole to elastically receive and move a movable contact portion. As a result, the fixed contact portion includes a guide portion formed at one end for receiving the movable contact portion.

In one embodiment, the fixed contact portion may further include a guide support member that engages between the fixed contact member and the guide portion and supports the guide portion through a groove formed by being coupled to the shield member.

In one embodiment, the fixed contact portion is located between the fixed contact member and the shield member and a spring member for supporting the fixed contact member to elastically receive the movable contact and an elastic support member for supporting the elasticity of the spring member It may further include.

In one embodiment, the guide portion is made of a Teflon (teflon) resin, it is located in the groove formed between the shield member and the guide support member may extend to the top of the shield member to guide the movable contact.

In one embodiment, the contact device for the gas insulated switchgear may be electrically guided by the movable contact portion performing the linear reciprocating motion between the guide portion and in contact with the fixed contact portion.

The present invention has an effect that can be more accurately combined with the movable contact by making a guide portion in the contact device for a gas insulated switchgear according to the present invention having the configuration as described above and inserting it into the contact device.

The present invention can reduce the manufacturing cost by using a Teflon resin in the guide portion of the gas insulated switchgear contact device of the present invention having the configuration as described above, and reduce the wear and damage caused by the arc with the movable contact It can give an effect.

1 is a cross-sectional view illustrating a gas insulated switchgear according to an embodiment of the present invention.
It is sectional drawing explaining the contact device for gas insulated switchgear shown in FIG.
It is a top view explaining the guide part of the contact device for gas insulated switchgear shown in FIGS.

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.

On the other hand, the meaning of the terms described in the present invention will 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 is to be understood that the singular " include " or "have" are to be construed as including the stated feature, number, step, operation, 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 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 busbar 110, a busbar disconnector 120, a current transformer 130, a circuit breaker 140, a repair ground switch 150, and a circuit disconnector 160. The line grounding switch 170 and the bushing 180 may be included in the grounded metal housing.

The components 110 to 180 may form a line through interconnection, and the gas insulation switchgear 100 may be filled with an insulating gas having excellent insulation and extinguishing performance, for example, SF6 gas, into an insulating medium. Can be used.

The bus line 110 is a main path through which electric power to be transmitted flows. In one embodiment, the bus disconnector 120 is used to open and close a circuit in a no-load state and disconnect the circuit from the bus line 110 to the current transformer 130. Can be. The current transformer 130 may rectify the current flowing from the bus line 110. On the other hand, the bus disconnector 120 may disconnect the circuit exiting from the current transformer 130 to the bus (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 disconnectors 120 and 160, the breakers 140, and the ground breakers 150 and 170 of the gas insulated switchgear may be disconnected or grounded using the gas insulated switchgear contact device 200. Hereinafter, a contact device for a gas insulated switchgear will be described with reference to FIGS. 2 to 3.

FIG. 2 is a cross-sectional view illustrating the contact device for the gas insulated switchgear shown in FIG. 1, and FIG. 3 is a plan view illustrating the guide part of the contact device for the gas insulated switchgear shown in FIGS. 1 and 2.

2 to 3, the gas insulated switchgear contact device 200 may include a fixed contact portion 210, a guide portion 220, a base portion 230, and a movable contact portion 240.

The fixed contact 210 may include a shield member 211 and a fixed contact member 212. Further, in one embodiment, the fixed contact 210 may include a guide support member 213, a spring member 214, and It may further include an elastic support member 215.

The shield member 211 may be formed as a circumferential hole and connected to a portion of the outer surface of the base portion 230 and spaced apart from the remaining outer surface to extend in the direction of the shield member 211. One end of the shield member 211 may form a curved surface in the inner direction to prevent the arc discharge.

In one embodiment, the shield member 211 may be formed of a conductive metal having conductivity. Here, the conductive metal means a material having a relatively high conductivity of heat or electricity, and has a property of conducting heat or electricity well.

The fixed contact member 212 may be spaced apart along the inner circumference of the shield member 211, and may include a portion of the spring member 214 in the shield member 211 direction. In one embodiment, the stationary contact member 212 may elastically receive the movable contact 240 through the spring member 214.

The guide support member 213 may support the guide part 220 through a groove formed between the fixed contact member 212 and the guide part 220 and partially coupled to the shield member 211.

The spring member 214 and the fixed contact member 212 may be fixed by being embedded in a portion of the inner surface of the base portion 230, and the movable contact 240 when the movable contact 240 enters the fixed contact 210. ) To power on. The spring member 214 may be supported by the shield member 211 through the elastic support member 215.

In one embodiment, the fixed contact 210 may further include a latch (not shown) that can secure the movable contact 240 is inserted. For example, the movable contact portion 240 may have an engraved locking groove, and may further include a latch for locking the movable contact portion 240 while being inserted into the fixed contact portion 210. Such a latch may be embossed on the inner side of the shield member 211.

The guide part 220 is a non-conductive material and is positioned in a groove formed between the shield member 211 and the guide support member 213, and extends to protrude to the upper end of the shield member 211 to guide the movable contact part 240. Can be. In one embodiment, the guide portion 220 may be formed of a teflon resin. In one embodiment, the protruding region of the guide portion 220 may form a predetermined slope in the outward direction. This is to facilitate the reciprocating motion of the movable contact 240. For example, the predetermined inclination angle may correspond to about 15 degrees with respect to the vertical line.

The base 230 is positioned at the lower end of the shield member 211 to support the shield member 211 and the fixed contact member 212. In one embodiment, the base portion 230 supports the fixed contact member 212 in the opposite direction of the shield member 211 in the fixed contact member 212 to fix the contact member 212 as the movable contact 240 moves. It can help to maintain a certain shape of).

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

100: gas insulated switchgear
110: busbar 120: busbar disconnector
130: current transformer 140: breaker
150: repairing ground breaker 160: line disconnector
170: line grounding switch 180: bushing
200: contact device for gas insulated switchgear
210: fixed contact
211: shield member 212: fixed contact member
213: guide support member 214: spring member
215: elastic support member
220: guide part
230: base portion
240: movable contact

Claims

A fixed contact portion including a shield member forming a circumferential hole and a fixed contact member disposed along the inside of the circumferential hole and configured to elastically receive and move a movable contact portion; And
The non-conductive material, the contact device for a gas insulated switchgear comprising a guide portion formed at one end to receive the movable contact to the fixed contact.

The connector according to claim 1, wherein the fixed contact
And a guide support member which engages between the fixed contact member and the guide portion and supports the guide portion through a groove formed to be partially coupled to the shield member.

The connector according to claim 1, wherein the fixed contact
A gas member positioned between the fixed contact member and the shield member to support the fixed contact member to elastically receive the movable contact portion, and an elastic support member to support the elasticity of the spring member. Contact device for insulated switchgear.

The method of claim 1, wherein the guide portion
A gas insulated switchgear contact formed of a teflon resin, positioned in a groove formed between the shield member and the guide support member, and protruding to an upper end of the shield member to guide the movable contact. Device.

According to claim 1, The contact device for gas insulated switchgear
And a base portion connected between an end of the shield member and the fixed contact member to support the fixed contact portion.