KR100585859B1 - Gas insulated switchgear and its contact assembly - Google Patents

Abstract

The present invention relates to a gas insulated switchgear and a contact assembly thereof. According to the present invention, there is provided a gas insulated switchgear comprising: a plurality of cases having a tubular shape in which a receiving space is formed in which an upper surface is openable and having openings formed at two sides facing each other, the openings being adjacent to each other; Bus bars respectively disposed along the direction connecting the two openings to the insides of the respective cases; A bushing formed in a plate shape with an insulating member so as to have an expanded size compared to the opening, and having a plurality of through holes formed through the plate surface, the bushing being detachably coupled to the case to block the respective openings in the case; ; An insulating spacer formed between the bushings of the two cases in which the openings are spaced apart from each other, the receiving member having a receiving hole formed through the plate surface and having a smaller size than the opening; A connection conductor having one side accommodated in the accommodation hole and the other side detachably coupled to the bus bar through the through hole; It is characterized in that it comprises a contact assembly that is accommodated in the receiving hole and each end of the connection conductor is inserted and coupled to both sides so that each bus bar is electrically connected to each other. As a result, separation and bonding of the thermally deteriorated panel can be facilitated.

Description

CUBICLE GAS INSULATED SWITCHGEAR AND CONTACT ASSEMBLY THEREOF}

1 is a view showing a nirvana state of a conventional gas insulated switchgear;

2 is a left side view of the panel of FIG. 1, FIG.

3 is a front sectional view of the contact assembly region of FIG. 1;

4 is a perspective view of the contact assembly of FIG.

5 is a cross-sectional view of FIG.

6 is a perspective view of main parts of a gas insulated switchgear according to an embodiment of the present invention;

7 is a cross-sectional view showing a coupling state of the bushing region of FIG.

8 is a perspective view of the contact assembly region of FIG.

9 and 10 are an enlarged view and an exploded perspective view of the contact assembly of Figure 8, respectively;

11 is a view for explaining the coupling of the contact assembly and the connecting conductor of FIG.

12 is a view illustrating a state in which the bushing of FIG. 7 is separated.

Explanation of symbols on the main parts of the drawings

11: case 13: opening

21: busbar 31: bushing

41: insulation spacer 42: receiving hole

51: connecting conductor 61: contact bonding

62: body 63: insert

65: contact member 67: contact

69: fixing bolt 70: spring member

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas insulated switchgear and a contact assembly thereof, and more particularly to a gas insulated switchgear and a gas insulated to stably maintain a contact state. It relates to a switchboard and a contact binder thereof.

A switchboard is a device that constantly puts and manages switches, instruments, relays, and the like for operation and control of power plants, substations, and motors, and the like. (SF ₆ ) The use of gas insulated switchboards using gas is increasing.

1 is a view showing a nirvana state of a conventional gas insulated switchgear, FIG. 2 is a left side view of the panel of FIG. 1, FIG. 3 is a sectional front view of the contact assembly region of FIG. 1, and FIG. 4 is a contact of FIG. 1. 5 is a perspective view of the assembly, and FIG. 5 is a cross-sectional view of FIG. 4. As shown in these figures, the gas insulated switchgear includes a plurality of panels 101 arranged side by side to be electrically connected to each other.

In the upper region of each panel 101, three-phase bus bars 109 are installed to be parallel to each other, and in the lower region, a cable chamber 105 for receiving cables 106 connected to the bus bar side or the load side is formed. have. Circuit breaker chamber 103, which is provided with a circuit breaker (not shown) interposed between the upper bus bar 109 and the lower cable 106 in the center region along the up and down direction of each panel 101 to open and close the circuit. ) Is formed.

Meanwhile, a spacer 113 is coupled to one side of an upper space of each panel 101 in which three-phase bus bars 109 are accommodated, and a plurality of spacers 113 can support each bus bar 109. Bushing 117 is coupled through the spacer 113. One end of the bus bar 109 is coupled to each bushing 117 so as to protrude, and each bus bar 109 of the panel 101 adjacent to each other is electrically connected to the protruding end region of each bus bar 109. The contact assembly 121 is coupled to be connected to. The other side of the panel 101 along the longitudinal direction of the bus bar 109 is formed with an opening for inserting the contact assembly 121 coupled to the bus bar 109 of the adjacent panel 101.

Each contact assembly 121 has a circular ring-shaped supporter 123 and a contact 126 formed on one side thereof so as to be in contact with the outer diameter surface of each bus bar 109. A plurality of chips 125 disposed to be spaced apart from each other by a predetermined distance and the chips 125 arranged around the supporter 123 are coupled so that each contact 126 elastically contacts the busbar 109. It is configured to include a spring member 127 to apply an elastic force.

However, in the conventional gas insulated switchgear, one side of the bus bar 109 is formed to protrude toward the side of the panel 101, and the protruding end is inserted into the other panel 101 to contact the contact assembly 121. It is to be connected to the bus bar 109 of the other panel 101 as a medium, and when the inspection and repair of the panel 101, the thermally separated panels 101 must be separated from each other along the longitudinal direction of the bus bar 109. Therefore, there is a problem that separation and inspection become very difficult.

In addition, the contact assembly 121 is arranged around the circular ring-shaped supporter 123, the plurality of chips 125 provided with the contacts 126 are spaced apart from each other, and the circular ring-shaped on the outer surface of the chip 125 Since the spring member 127 has a structure that couples the spring member 127, it is pointed out that when the period of use elapses, the contact state cannot be stably maintained due to deformation of the spring member 127 and / or a decrease in elastic force. .

Accordingly, it is an object of the present invention to provide a gas insulated switchgear which can facilitate separation and joining of nibble panels.

Another object of the present invention is to provide a contact assembly of a gas insulated switchgear capable of stably maintaining a contact state.

According to the present invention, there is provided, according to the present invention, a plurality of cases having a tubular shape in which an upper surface of the receiving space is formed, the opening is formed on two sides facing each other and the openings are disposed adjacent to each other; Bus bars respectively disposed along the direction connecting the two openings to the insides of the respective cases; A bushing formed in a plate shape with an insulating member so as to have an expanded size compared to the opening, and having a plurality of through holes formed through the plate surface, the bushing being detachably coupled to the case to block the respective openings in the case; ; An insulating spacer formed between the bushings of the two cases in which the openings are spaced apart from each other, the receiving member having a receiving hole formed through the plate surface and having a smaller size than the opening; A connection conductor having one side accommodated in the accommodation hole and the other side detachably coupled to the bus bar through the through hole; It is achieved by a gas insulated switchgear, characterized in that it comprises a contact coupling that is accommodated in the receiving hole and each end of the connection conductor is inserted and coupled to both sides so that each busbar is electrically connected to each other.

Here, it is preferable that the insulating spacers are in contact with each other by contacting the outer surface of the bushing, respectively.

It is effective to apply insulating grease between the two surface-contact insulating spacers.

The bushing is preferably formed in a three-phase integral type.

The case is open upward, and the bushing is effectively integrally coupled to the case detachably from the inside of the case.

The contact coupler is a body having inserts formed on both sides of the conductor in the longitudinal direction, respectively, and formed of a conductor, and one end of the connection conductor is inserted at a predetermined depth to elastically contact along the radial direction of the connection conductor. One side is divided from each other so as to be spaced apart from each other along the circumferential direction of the connecting conductor and the other side is formed to be connected integrally and a pair of contact members inserted into each of the insertion portion, respectively, the radius from the outside of the body It is preferable to include a plurality of fixing members inserted along the direction to the front end is coupled to the contact member to suppress the contact member from being separated from the body.

It is effective to further include a spring member coupled to the circumference of the contact member to apply an elastic force so that the contact member elastically contacts the connection conductor.

The contact member may be bent such that a free end region is spaced apart from the connecting conductor to guide the insertion of the connecting conductor smoothly and to prevent the spring member from being separated.

On the other hand, according to another field of the invention, the body is formed of a conductor to be provided with inserts on both sides along the longitudinal direction; It is formed of a conductor and one side end of the connecting conductor is inserted into a predetermined depth so that it can be elastically contacted in the radial direction of the connecting conductor, one side is divided from each other and disposed spaced apart from each other along the circumferential direction of the connecting conductor and the other side is integral The contact assembly of the gas insulated switchgear is formed so as to be connected to each other and includes a pair of contact members which are respectively inserted into the insertion portion is provided.

Here, the contact member is preferably fixed so that the departure from the body is suppressed by a plurality of fixing members that are inserted along the radial direction from the outside of the body to the front end is coupled to the contact member.
A circumference of the contact member is preferably provided with a spring member for applying an elastic force so that the contact member elastically contacts the connection conductor.

In addition, the contact member is guided to facilitate the insertion of the connection conductor, it is effective that the free end region is bent so as to be spaced apart from the connection conductor to prevent the spring member from being separated.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

6 is a perspective view illustrating main parts of a gas insulated switchgear according to an exemplary embodiment of the present invention, FIG. 7 is a cross-sectional view illustrating a coupling state of the bushing region of FIG. 6, and FIG. 8 is a perspective view of the contact assembly region of FIG. 7. 9 and 10 are enlarged views and separated perspective views of the contact assembly of FIG. 8, respectively, and FIG. 11 is a view for explaining the coupling of the contact assembly and the connecting conductor of FIG. 10, and FIG. 12 is a state in which the bushing of FIG. 7 is separated. Figure is a diagram. As shown in these figures, the gas insulated switchgear has a tubular shape that forms a receiving space therein, and has a plurality of openings 13 formed on both sides facing each other, and the openings 13 are adjacent to each other. A case 11, a bus bar 21 arranged along a direction connecting the two openings 13 to the inside of the case 11, and a bushing formed in a plate shape with an insulating member to be coupled to block the opening 13. And an insulating spacer 41 interposed between the bushings 31 adjacent to each other with an accommodating hole 42 formed in a plate shape and penetrating through the plate surface, and accommodated in the accommodating hole 42. One side is connected to the bus bar 21 through the bushing 31 and the connection conductor 51, which is accommodated in the receiving hole 42 and each end of the connection conductor 51 is inserted into each bus bar ( 21 is configured to include a contact assembly 61 to be electrically connected to each other.

Each case 11 is formed to have a rectangular parallelepiped shape with an open upper side, and an upper opening region is provided with a cover (not shown) for forming an accommodation space cooperatively with the case 11.

Openings 13 are formed at opposite sides of each case 11, and bushings 31 are coupled to each opening 13 to be sealed. A female threaded portion 14 is formed at the edge of each opening 13, and a bolt hole 34 passes through the edge of the bushing 31 so that the bolt 15 fastened to each female threaded portion 14 can pass therethrough. Formed.

The bushing 31 is formed in an elliptical plate shape as an insulating member, and the recess 32 is recessed along the thickness direction so that the insulating spacer 41 can be inserted into a predetermined depth. Each plate surface of the bushing 31 passes through the connection conductors 51 respectively coupled to one end of the bus bar 21 spaced apart from each other in parallel to each other in the three phases inside the case 11. 35 is formed.

The insulating spacer 41 is formed in an almost oval plate shape as an insulating member so as to be interposed between the two cases 11 spaced apart from each other with an insulating distance therebetween, and the contact surface 61 may be accommodated and coupled to the plate surface. The receiving hole 42 is formed to correspond to each phase.

On the other hand, the contact coupler 61 is a body 62 made of a conductor, each having an insertion portion 63 formed at a predetermined depth at both ends in the longitudinal direction, and one side is elastic to the outer diameter surface of the connecting conductor 51. The contact member is divided into a pair of conductors which are divided so as to be spaced apart from each other in the circumferential direction of the connecting conductor 51 so as to be contacted with each other, and the other side is integrally formed to be inserted into and coupled to the inside of the insert 63. 65 and a fixing member which penetrates through the body 62 along the radial direction of the body 62 and is coupled to the contact member 65 so as to be restrained from being detached from the body 62. A plurality of fixing bolts 69 and the contact member 65 is provided with a plurality of spring members 70 for applying an elastic force to elastically contact the outer diameter surface of the connecting conductor 51.

A plurality of bolt holes 64 are formed in the circumferential surface of each insertion portion 63 of the body 62 to allow the fixing bolt 69 to pass therethrough, and each bolt hole is formed in the circumferential surface of the contact member 65. The female screw portion 68 is formed to correspond to 64. The contact 67 is formed on the inner surface of the contact member 65 so as to be in contact with the outer diameter surface of the connecting conductor 51, and the free end of each contact member 65 guides the insertion of the connecting conductor 51. In addition, the spring member 70 is bent outwardly along the radial direction to be spaced apart from the outer diameter surface of the connecting conductor 51 to prevent the spring member 70 from being separated.

By such a configuration, the bushing 31 is integrally coupled to each opening 13 of the case 11, and the connecting conductor 51 is inserted and coupled to the bushing 31. Both ends of the bus bar 21 are connected to each inner end of the connecting conductor 51, and the connecting conductor 51 and the bus bar 21 are fixedly coupled to each other by fixing means such as bolts. Insulating spacers 41 are disposed in regions exposed to the outside through the openings 13 of the case 11, and contact coupling bodies 61 are accommodated in the receiving holes 42 of the insulating spacers 41, respectively. Be sure to

When insulating grease is applied to each outer surface of the insulating spacer 41 and the case 11 is pressurized such that each insulating spacer 41 is brought into close contact with a predetermined pressure, the connection conductor 51 exposed to the outside of the bushing 31 is exposed. The end of is inserted into each contact member 65 of the contact assembly 61. At this time, each contact member 65 is opened to the outside in the radial direction when the end of the connecting conductor 51 is inserted, and when the insertion of the connecting conductor 51 is completed to its own elastic force and the elastic force of the spring member 70. As a result, each contact 67 is pressed inward to elastically contact the outer diameter surface of the connecting conductor 51.

On the other hand, when you want to check the nibble panel along the longitudinal direction of the bus bar 21, remove the cover of the case 11 of the panel to be inspected, and the bus bar 21 and the connecting conductor 51 is coupled Release it. Next, the bushing 31 is separated from the case 11, and as shown in FIG. 12, the insulating spacer 41 and the connecting conductor through the opening 13 of the case 11 in which the bushing 31 is separated. Separate each 51. Accordingly, the panel to be inspected can be moved horizontally in the longitudinal direction of the bus bar 21, that is, the front and rear or up and down directions of the panel, so that the panel can be easily inspected and / or repaired after moving the panel. It becomes possible.

As described above, according to the present invention, a case having a tubular shape to form a receiving space therein and having openings formed at two opposite sides thereof, a bushing formed to form a plate with an insulating member and coupled to block the opening; A bus bar disposed along a direction connecting the opening to the inside of the case, an insulating spacer interposed between the bushings of the case disposed adjacent to each other with a receiving hole, and one side is accommodated in the receiving hole and the other side passes through the bushing. Checking the panel by providing a connecting conductor connected to one end of the bus bar and a contact assembly disposed inside the receiving hole so that each end of both connecting conductors is inserted and coupled so that the bus bars of both cases are electrically connected to each other. The panel to be inspected at the time of inspection can be easily moved in the transverse direction to the length of the busbar for inspection and / or maintenance. There is provided a gas insulated switchgear that can facilitate the operation.                     

In addition, according to the present invention, the contact member has a cylindrical shape and the insertion portion is formed at a predetermined depth at both ends along the longitudinal direction, and one side is separated so as to be in elastic contact with the outer diameter surface of the connecting conductor connecting conductor Spaced apart along the circumferential direction of the other side is formed to be integrally connected to each other to have a pair of contact members inserted into the insertion portion, and a spring member for applying an elastic force so that the contact member and the connecting conductor elastically contact. Thus, a contact assembly of a gas insulated switchgear capable of maintaining a stable contact even after a period of use has been provided.

Claims (12)

A plurality of cases having a tubular shape in which an upper surface of the receiving space is openable and having openings formed at two opposite sides thereof, the openings being adjacent to each other; Bus bars respectively disposed along the direction connecting the two openings to the insides of the respective cases; A bushing formed in a plate shape with an insulating member so as to have an expanded size compared to the opening, and having a plurality of through holes formed through the plate surface, the bushing being detachably coupled to the case to block the respective openings in the case; ; An insulating spacer formed between the bushings of the two cases in which the openings are spaced apart from each other, the receiving member having a receiving hole formed through the plate surface and having a smaller size than the opening; A connection conductor having one side accommodated in the accommodation hole and the other side detachably coupled to the bus bar through the through hole; Gas insulated switchgear, characterized in that it comprises a contact coupling that is accommodated in the receiving hole and each end of the connection conductor is inserted and coupled to both sides electrically connected to each bus bar. The method of claim 1, The insulating spacer is a gas insulated switchgear, characterized in that the surface is in contact with each other in contact with the outer surface of the bushing. The method of claim 2, And an insulating grease is applied between the two surface-contacted insulating spacers. The method of claim 1, The bushing is a gas insulated switchgear, characterized in that formed in three-phase integrated. delete The method according to any one of claims 1 to 4, The contact coupler is a body having inserts formed on both sides of the conductor in the longitudinal direction, respectively, and formed of a conductor, and one end of the connection conductor is inserted at a predetermined depth to elastically contact along the radial direction of the connection conductor. One side is divided from each other so as to be spaced apart from each other along the circumferential direction of the connecting conductor and the other side is formed to be connected integrally and a pair of contact members inserted into each of the insertion portion, respectively, the radius from the outside of the body And a plurality of fixing members inserted along the direction to prevent the contact member from being separated from the body by distal end portion coupled to the contact member. The method of claim 6, The contact assembly further comprises a spring member coupled to the circumference of the contact member to apply an elastic force so that the contact member elastically contacts the connection conductor. The method of claim 7, wherein The contact member is a gas insulated switchgear, characterized in that the free end region is bent so as to be spaced apart from the connecting conductor to guide the smooth insertion of the connecting conductor and to prevent the spring member from being separated. A body formed of a conductor such that insertion parts are provided at both sides along a longitudinal direction thereof; It is formed of a conductor and one side end of the connecting conductor is inserted into a predetermined depth so that it can be elastically contacted in the radial direction of the connecting conductor, one side is divided from each other and disposed spaced apart from each other along the circumferential direction of the connecting conductor and the other side is integral The contact assembly of the gas insulated switchgear, characterized in that it comprises a pair of contact members which are formed so as to be connected to each of the insertion portion inserted. The method of claim 9, The contact member is inserted in the radial direction from the outside of the body is a contact assembly of the gas insulated switchgear, characterized in that fixed to the departure from the body by a plurality of fixing members that the front end is coupled to the contact member. The method of claim 9, And a spring member for applying an elastic force to the contact member so as to elastically contact the connection conductor. The method of claim 11, The contact member is guided to facilitate the insertion of the connection conductor and the contact assembly of the gas insulated switchboard, characterized in that the free end region is bent to be spaced apart from the connection conductor to prevent the spring member from being separated. .

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