KR101148372B1 - Switch module for solid insulated switchgear - Google Patents

Abstract

PURPOSE: A switch module for a solid insulating switch gear is provided to suppress the concentration of electric fields in a main circuit conductor by forming an insulating cap based on a semi-conductive part and an insulating part. CONSTITUTION: The switch module for a solid insulating switch gear includes a body(110) with a hollow part, a main circuit fixed conductor(130) arranged in the hollow part, and a fixed contactor(140) which is spaced apart from the main circuit fixed conductor. The switch module for a solid insulating switch gear further includes a moving contactor(150) and an elastic member. The moving contactor moves between a connecting position and a separating position. The connecting position is in connection with the main circuit fixed conductor and the fixed contactor. The separating position is the position which is separated from the fixed contactor. An insulating cap is arranged in the hollow part and suppresses the concentration of electric field in the main circuit fixed conductor.

Description

SWITCH MODULE FOR SOLID INSULATED SWITCHGEAR}

The present invention relates to a switch module of a solid insulated switchgear, and more particularly, to a switch module of a solid insulated switchgear capable of improving insulation performance and suppressing deformation.

As is well known, the switchgear is a species of high pressure switch.

The switchgear is used in the form of a so-called gas insulated switchgear (GIS) which mainly uses sulfur hexafluoride (SF ₆ ) gas as an insulating material.

Sulfur hexafluoride gas is regulated for its use due to adverse effects on the environment such as ozone layer destruction. Recently, a plan to replace sulfur hexafluoride gas has been devised, and a so-called solid insulation switchgear using a solid member (for example, an epoxy resin) as an insulating material has been developed and used.

The solid insulated switchgear may include a bus bar connection part, a load connection part, a load switch and / or a switch module. In this case, the switch module may include a disconnecting switch and / or a grounding switch.

The disconnector is a device for isolating the circuit in a state in which the load circuit is interrupted by the load switch, and may be distinguished from the load switch in that the load is not opened or closed.

The ground switch is a device for grounding the residual current charged on the circuit in a state in which the load circuit is interrupted by the load switch.

The disconnector and the ground switch may have the same basic configuration except that the disconnector is connected to the bus bar and the ground switch is grounded.

More specifically, the disconnecting device and the grounding switch, the body is made of an insulating material, the main circuit conductor provided in the body, the fixed contactor spaced apart from the main circuit conductor, the main circuit conductor and the fixed contactor is arranged to be movable Each may be configured with a movable contactor.

As shown in FIG. 1, a switch module of a conventional solid insulation switch gear may be configured for each phase of a power source. For example, the switch module may be composed of three.

Each switch module may include a body 10 formed of an insulating member, a main circuit fixing body 30 provided in the body 10, and a fixed contact disposed to be spaced apart from the main circuit fixing body 30 by a predetermined distance. 40 and the movable contactor 50 disposed between the main circuit fixer 30 and the fixed contactor 40 to connect and disconnect the main circuit fixer 30 and the fixed contactor 40. Each may be provided.

The body 10 may be formed of a substantially rectangular parallelepiped. The main circuit fixing body 30 may be provided inside the body 10 to form a main circuit.

The main circuit fixing body 30 may include a first fixing body 31 and a second fixing body 35 connected to the first fixing body 31 and formed of a hollow body.

The fixed contact 40 may be disposed on one side of the body 10.

The fixed contact 40 may be provided with a housing 41 formed of an insulating member on the outside of the conductor.

A movable contact 50 may be provided between the main circuit fixer 30 and the fixed contactor 40 to electrically connect and disconnect the main circuit fixer 30 and the fixed contactor 40. .

The movable contact 50 may include a first movable conductor 51 having one side electrically connected to the main circuit fixer 30, and one end connected with the first movable conductor 51 and the other side of the movable contact 50. The second movable conductor 55 may be connected to and separated from the fixed contactor 40.

The first movable conductor 51 and the second movable conductor 55 may be formed of a hollow body. That is, the first movable conductor 51 and the second movable conductor 55 may be formed in a pipe shape.

An insulation spacer 45 may be provided between the body 10 and the fixed contact 40 to insulate the movable contact 50. The insulating spacer 45 may be formed in a pipe shape.

The switch module is configured to drive between the connection position where the movable contactor 50 is connected to the fixed contactor 40, and the separation position where the movable contactor 50 is electrically separated from the fixed contactor 40. The movable contact driver 60 may be provided.

In this case, when the switch module is configured as a disconnecting unit, the switch module may include a bus bar connecting part 47 so that the fixed contactor 40 may be connected to the bus bar.

The movable contactor driver 60 includes a male screw part 63 and is disposed on the lead screw 61 disposed at the center of the main circuit fixer 30 and the movable contactor 50, and the lead screw 61 is screwed to the lead screw 61. Coupled to the female screw 65 to reciprocate in the axial direction during rotation, the drive motor 67 for generating a driving force for the rotation of the lead screw 61, and the rotational force of the drive motor 67 to the lead screw ( It may be configured with a power transmission unit 71 for transmitting to 61.

An insulation cap 81 may be provided between the body 10 and the power transmission unit 71 to insulate the main circuit high precision body 30.

As shown in FIGS. 2 and 3, the insulating cap 81 may have a disk shape having a through hole 83 to insert the lead screw 61 at the center thereof.

The insulating cap 81 may be composed of a synthetic resin member having an insulating performance. For example, the insulating cap 81 may be made of monomer cast nylon (MC nylon).

The insulating cap 81 may include a curved portion 85 formed to have a curved surface so that electric field concentration can be relaxed. The curved portion 85 may be formed on a surface in contact with the main circuit stabilizer 30 and the movable contact 50. The surface of the curved portion 85 may be provided with an application portion 87 formed by applying a semiconductive paint. As a result, electric field concentration of the main circuit stabilizer 30 can be relaxed.

However, in the switch module of the conventional solid insulated switchgear, the insulating cap 81 is formed of a rigid member such as a thermosetting resin, so that the conductor and the gap may occur due to shrinkage after molding. This may lower the insulation performance.

In addition, when the power transmission unit 71 is coupled to the power transmission unit 71 and the insulating cap 81 is in close contact with the gap between the insulating surface is generated, thereby reducing the insulation performance.

In addition, peeling and / or dropping of the semiconductive paint of the application part 87 provided on the curved portion 85 of the insulating cap 81 may occur. Thereby, the pieces of semiconductive paint peeled off or away from the curved portion 85 may cause electric field concentration and / or short circuit.

In addition, during continuous opening and closing of the switch module, thermal deformation of the insulating cap 81 may occur due to friction (heat) during continuous rotation of the lead screw 61. Restraint of the lead screw 61 due to thermal deformation of the insulating cap 81 may occur.

Accordingly, an object of the present invention is to provide a switch module of a solid insulated switchgear capable of improving insulation performance.

In addition, another object of the present invention is to provide a switch module of a solid insulated switchgear which can improve insulation performance and extend life.

The present invention, to achieve the object as described above, the body provided with a hollow; A main circuit fixed conductor disposed inside the hollow; A fixed contact disposed to be spaced apart from the main circuit fixed conductor; One side is connected to the main circuit fixed conductor and the other side is movable contact for moving between a connection position connected to the fixed contactor and a separation position separated from the fixed contactor; And an insulating cap formed of an elastic member and disposed in the hollow and in contact with the main circuit high-conductor to suppress electric field concentration.

Here, the insulating cap includes: a semiconducting portion in contact with the main circuit high conductor; And an insulating part disposed outside the semi-conductive part.

The semiconducting portion may be made of semiconductive silicon, and the insulating portion may be made of insulating silicon.

The movable contact may include: a first movable conductor contacting the inner surface of the main circuit fixed conductor and protrudingly received; And a second movable conductor contacting the inner surface of the first movable conductor and protrudingly received therefrom.

In the separating position, the insulating portion and the semi-conductive portion may be configured to be disposed along the radial direction to be in contact with the ends of the main circuit fixed conductor at the same time.

In the separation position, the first movable conductor may be configured such that an end thereof contacts the semiconducting portion.

The semiconducting portion may be configured to protrude further toward the main circuit high conductor side than the insulating portion.

The movable contactor may be configured to further include a movable contactor driving unit for driving between the connection position and the separation position.

The movable contactor driving unit includes: a lead screw having a male screw part and rotatably disposed in the hollow; A female screw portion provided in the movable contactor and screwed to the male screw portion; It may be configured to include; and a drive motor for generating a driving force for rotating the lead screw.

It may be configured to further include an insulating power transmission unit for transmitting the driving force of the drive motor to the lead screw to enable insulation.

The insulating power transmission unit, the rotating plate is engaged with the lead screw to rotate; And a casing disposed at an outer side of the rotating plate to support the rotating plate so as to insulate the rotating plate. The insulating part may include a rotating plate inserting unit to insert a region of the rotating plate.

One side of the rotating plate is formed with an insertion portion into which the end of the lead screw is inserted, the other side of the rotating plate may be formed with a protrusion protruding to be inserted into the insertion portion of the other rotating plate.

As described above, according to an embodiment of the present invention, by forming an elastic member and disposed inside the hollow, by having an insulating cap to contact the main circuit fixed conductor to suppress the electric field concentration, close contact with the conductor Performance can be provided. As a result, the insulation performance can be improved.

In addition, according to an embodiment of the present invention, by configuring the insulating cap having a semiconducting portion and an insulating portion, it is possible to suppress (relax) the electric field concentration of the main circuit conductor, thereby suppressing occurrence of partial discharge and the like.

In addition, forced deterioration due to electric field concentration can be prevented, whereby insulation performance can be improved.

In addition, since the insulating cap is made of insulating silicone (resin) and semiconductive silicone (resin), deformation due to heat during continuous opening and closing of the switch module can be suppressed. Thereby, the occurrence of restraint of the lead screw due to thermal deformation can be suppressed and the service life can be extended.

In addition, it is possible to exclude the use of the semiconductive paint, so that there is no fear of peeling and / or dropping of the semiconducting paint, and the short circuit and / or the electric field concentration concern due to the peeled or fallen semiconducting paint can be excluded.

1 is a cross-sectional view of a switch module of a conventional solid insulated switchgear,
Figure 2 is a perspective view of the insulating cap of Figure 1,
3 is a cross-sectional view of the insulating cap of FIG.
4 is a perspective view of a switch module of a solid insulated switchgear according to an embodiment of the present invention;
5 is a cross-sectional view taken along the line VV of FIG. 4;
6 is an enlarged view illustrating main parts of FIG. 5;
7 is an enlarged view illustrating a coupling state of the rotating plate of FIG. 5;
8 is a perspective view of the movable contact of FIG.
9 is a view for explaining the operation of the movable contact of FIG.
10 is a perspective view of the insulating cap of Figure 5,
FIG. 11 is a cross-sectional view of the insulating cap of FIG. 10.

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

As shown in Figure 4 and 5, the switch module of the solid state insulating switchgear according to an embodiment of the present invention, the body 110 is provided with a hollow 112; A main circuit stabilizer 130 disposed inside the hollow 112; A fixed contactor 140 spaced apart from the main circuit fixer 130; One side is connected to the main circuit fixing body 130, the other side is movable contactor 150 to move between the connection position is connected to the fixed contactor 140 and the separation position separated from the fixed contactor 140; And an insulating cap 201 formed of an elastic member and disposed inside the hollow 112 and in contact with the main circuit fixing body 130 to suppress electric field concentration of the main circuit fixing body 130. It can be configured to include.

Here, the switch module may be configured to be arranged for each phase (eg, R phase, S phase, T phase, etc.) of the power source. In this embodiment, as shown in Figure 4, the switch module 104 provided in the distribution-grade solid-insulated switchgear is composed of three (105a, 105b, 105c) to be disposed corresponding to each phase (three phase) Although the case is arranged side by side with each other, the number may be appropriately adjusted according to the configuration of the switchgear.

The switch module 104 is a disconnector for isolating the circuit in a state in which the load (circuit) is blocked by a load breaker (for example, a vacuum circuit breaker) (not shown) when the fixed contactor 140 is connected to the bus bar. Can function as In addition, the switch module 104 may function as a ground switch when the fixed contactor 140 is grounded or connected to a grounding means. In addition, the switch module 104 may be configured to function as a disconnector and a ground switch in the same switchgear, respectively. Hereinafter, for convenience of description, the switch module 104 will be described with an example in which the fixed contactor 140 is provided with a bus bar connecting part 149, that is, a disconnecting device.

The switch module 104 may have a body 110 provided with a hollow 112 therein. The body 110 may be formed of a solid insulating member (for example, epoxy resin). The body 110 may be formed in an approximately rectangular parallelepiped. The hollow 112 may be formed to penetrate the body 110 in one direction. The hollow 112 may be formed to horizontally penetrate the inside of the body 110. In the present exemplary embodiment, the hollow 112 is formed to penetrate in the horizontal direction of the body 110, but may be configured to penetrate in the vertical direction.

The main circuit fixing body 130 may be provided inside the body 110.

The main circuit fixing body 130 may include a first fixing body 131 and a second fixing body 135 electrically connected to each other. The first fixed body 131 and the second fixed body 135 may be disposed perpendicular to each other. For example, as shown in FIG. 5, the first polymer body 131 may be disposed in the vertical direction in the drawing, and the second polymer body 135 may be arranged in the horizontal direction in the drawing. have.

The second high body 135 may be configured to have a reduced width (length) compared to the left and right widths of the body 110. The second fixed body 135 may be disposed in the hollow 112. Since the length of the second fixed body 135 is shorter than the length of the hollow 112, empty spaces may be formed on both sides of the second fixed body 135 inside the hollow 112.

The first fixed body 131 may be formed in a rod shape.

The second high body 135 may be formed in a hollow body or a tubular shape.

The first high body 131 and the second high body 135 may be integrally formed.

More specifically, the second polymer body 135 is formed in a tubular shape and disposed inside the hollow 112, and the first polymer body 131 is formed in a rod shape to form the second polymer body 135. It may be connected to the second fixed body 135 so as to be energized. Here, the first high body 131 may be formed to protrude to the upper side and the lower side of the second high body 135, respectively.

The body 110 may be configured to be connected to another switch module (not shown) in the vertical direction.

One end (the upper end portion in the drawing) of the first fixed body 131 has a receiving portion 132 is formed so that the other end of the first fixed body 131 of the other switch module is formed, the first fixed body ( The other end (lower part in the drawing) of the 131 may protrude downward from the surface of the body 110 so as to be inserted into the receiving part 132 of the first fixed body 131 of the other switch module 134. It can be configured to have.

Connection portions 114 may be provided at upper and lower portions of the body 110 so that different switch modules may be connected, respectively. The connection portion 114 may be configured to protrude to one side and to be recessed to the other side on the top or bottom surface of the body 110, respectively. For example, in the present exemplary embodiment, the connection part 114 has a recessed portion 115 recessed downward in the upper end of the body 110 and a protrusion 116 projecting downward in the lower end.

The fixed contact 140 may be disposed on one side of the body 110 (the right side in the drawing) to be spaced apart from the main circuit fixing body 130 by a predetermined distance. The outer side of the fixed contact 140 may be provided with a housing 141 formed of an insulating member (for example, epoxy resin). As a result, the fixed contact 140 may be insulated.

An insulating spacer 145 formed of an insulating member (eg, an epoxy resin) may be provided between the body 110 and the fixed contactor 140. The insulating spacer 145 may be formed in a pipe (pipe) shape. A plurality of uneven parts 146 protruding or withdrawing in a radial direction may be provided in the insulating spacer 145. As a result, the insulation distance (creepage distance) can be extended.

A movable contact 150 may be provided between the main circuit fixer 130 and the fixed contactor 140 to electrically connect and disconnect the main circuit fixer 130 and the fixed contactor 140 from each other. have.

8 and 9, the movable contactor 150 may include: a first movable conductor 151 contacting the inner surface of the main circuit fixer 130 and protrudingly received; And a second movable conductor 155 contacting the inner surface of the first movable conductor 151 and being protruded to be accommodated therein.

The first movable conductor 151 may be formed in a pipe shape. More specifically, the first movable conductor 151 may be composed of a circular tube.

The first movable conductor 151 may be configured to be accommodated in the second fixed body 135 of the main circuit stabilizer 130. The first movable conductor 151 may be formed to have a reduced outer diameter than an inner diameter of the second fixed body 135. Here, the first movable conductor 151 may have an outer diameter within a limit that can be smoothly inserted into the second fixed body 135, but may have an outer diameter as large as possible.

The first movable conductor 151 may be configured to be electrically connected to the second fixed body 135. More specifically, the at least one of the outer surface of the first movable conductor 151 and / or the inner surface of the second fixed body 135, the first movable conductor 151 and the second fixed body 135 are mutually A contact member 156 may be provided to allow energization to be in contact. For example, the contact member 156 may be provided on the inner surface of the second high precision body 135 to be in contact with the outer surface of the first movable conductor 151.

The second movable conductor 155 may be formed in a pipe shape.

The second movable conductor 155 may be configured to be accommodated in the first movable conductor 151. That is, the second movable conductor 155 has a reduced outer diameter compared to the inner diameter of the first movable conductor 151, but has an outer diameter of a limit that can be inserted smoothly, and has an outer diameter as large as possible. It may be desirable.

The second movable conductor 155 may be configured to be electrically connected to the first movable conductor 151. A contact member 156 is provided between the first movable conductor 151 and the second movable conductor 155 to electrically connect the first movable conductor 151 and the second movable conductor 155 to each other. Can be. More specifically, the contact member 156 may be provided on at least one of the inner surface of the first movable conductor 151 and the outer surface of the second movable conductor 155. For example, the contact member 156 may be provided on an inner surface of the first movable conductor 151 to be in contact with an outer surface of the second movable conductor 155.

The second movable conductor 155 may be configured to protrude to one side of the first movable conductor 151.

The second movable conductor 155 may have a longer length than the first movable conductor 151.

More specifically, one end of the second movable conductor 155 may be inserted into the fixed contactor 140, and the other end thereof may be exposed to the outside of the first movable conductor 151. An end portion of the second movable conductor 155 disposed outside the first movable conductor 151 may be inserted into the fixed contact 140 to be electrically connected.

A movable contact 157 may be provided at an end portion of the second movable conductor 155 inserted into the fixed contact 140. A movable contact 157 may be formed on an outer surface of the end portion of the second movable conductor 155. The fixed contact 140 may be provided with a fixed contact 144 in contact with the movable contact 157. The fixed contact 140 may be recessed inward to have an inner diameter. The fixed contact 144 may be provided on an inner diameter surface of the fixed contact 140.

The body 110 is movable to drive between the connection position where the movable contactor 150 is connected to the fixed contactor 140 and the separation position where the movable contactor 150 is separated from the fixed contactor 140 and spaced apart from the fixed contactor 140. The contact driver 160 may be provided.

The movable contactor driving unit 160 includes a male screw unit 163, a lead screw 161 rotatably disposed inside the hollow 112, and the movable contactor 150. It may be configured to include a female screw portion 165 screwed to the screw portion 163, and a drive motor 171 for generating a driving force for rotating the lead screw 161.

The lead screw 161 may be composed of an insulating member.

The lead screw 161 may have one end (left end in the drawing) protruding to one side (left side) of the body 110 and the other end (right end in the drawing) may be disposed in the fixed contactor 140. It may be configured to have a length.

An external thread portion 163 may be formed on an outer surface of the lead screw 161. The male screw portion 163 may be formed over a predetermined length along the axial direction from the end of the fixed contact 140 side. Here, the male screw portion 163 may be axially conveyed to allow the first movable conductor 151 and the second movable conductor 155 to be accommodated in the main circuit stabilizer 130. It can be formed in length.

The female screw portion 165 may be provided on the second movable conductor 155.

The female screw part 165 may be formed separately from the second movable conductor 155 to be coupled to the second movable conductor 155. As a result, when the lead screw 161 is rotated forward and reverse, the female screw part 165 linearly moves (reciprocates) along the axial direction of the lead screw 161 so that the second movable conductor 155 and the first screw are rotated. The single movable conductor 151 can reciprocate between the connection position and the separation position.

The female screw portion 165 may be coupled to an end portion of the second movable conductor 155 at the fixed contactor 140 side. Here, the female screw portion 165 may be configured to be formed directly on the inner surface of the second movable conductor 155.

The driving motor 171 may be provided at one side (the left side in the drawing) of the body 110.

An insulating power transmission unit 180 may be provided between the driving motor 171 and the lead screw 161 to transfer the driving force of the driving motor 171 to the lead screw 161 so as to insulate the driving motor 171.

A power transmission unit 172 may be provided between the driving motor 171 and the insulation power transmission unit 180 to transfer the rotational force of the drive motor 171 to the insulation power transmission unit 180.

The power transmission unit 172 is provided with a plurality of gears that are engaged with each other and rotate, one end is connected to the insulated power transmission unit 180, and the outer shaft is engaged with the gears to rotate the electric shaft member 175. can do. That is, the rotational force of the drive motor 171 is transmitted to the gears 173, and the gears 173 rotate the electric shaft member 175 so that the rotational force of the drive motor 171 is the insulation power. It may be delivered to the delivery unit 180.

As shown in FIG. 7, the insulated power transmission unit 180 includes: a rotating plate 191 engaged with the lead screw 161 to rotate; And a casing 181 disposed on the outer side of the rotating plate 191 to rotatably support the rotating plate 191 to be insulated. Here, the casing 181 and the rotating plate 191 may be formed of an insulating member.

The casing 181 may be formed in a substantially rectangular plate shape.

The casing 181 may include a coupling part 182 recessed at one side in the thickness direction and protruding to the other side. As a result, when the casing 181 is stacked in the thickness direction, the coupling parts 182 may be coupled to each other, thereby preventing flow in the plate surface direction.

The rotating plate accommodating part 184 may be formed at the center of the casing 181 so that the rotating plate 191 may be accommodated therein.

An insulating plate 195 formed of an insulating member may be interposed between the casings 181 stacked on each other. As a result, adhesion between the casings 181 may be improved, and electrical leakage through gaps between the casings 181 may be suppressed.

The insulating plate 195 may be formed of a member having a lower strength than the casing 181. The insulating plate 195 may be formed of an elastic member.

The insulating plate 195 may have a relatively thin thickness and have a shape recessed in one side and protruding to the other side. The insulating plate 195 may be configured to have a “V” cross-sectional shape. The insulating plate 195 may be formed in a circular ring shape with a center penetrated therein.

In the central region of the rotating plate 191, insertion portions 193 and protrusions 194 coupled to each other in the axial direction for power transmission may be provided. More specifically, an insertion part 193 recessed inwardly (axial direction) may be provided at one central side of the rotating plate 191 to insert an end portion of the lead screw 161 to a predetermined depth. The other side of the central region of the rotating plate 191 may be provided with a protrusion 194 protruding outward (axial direction) to be inserted into the insertion portion 193 of the other rotating plate 191. Here, the insertion portion 193 and the protrusion 194 may be configured to have a polygonal cross section. As a result, when the protrusion 194 is axially inserted into the insertion unit 193 of the other rotating plate 191, the insertion unit 193 and the protrusion 194 may be integrally rotated with each other because they are constrained with respect to the rotation direction. Can be.

On the other hand, the inner side of the body 110 may be provided with an insulating cap 201 in contact with the main circuit fixing body 130 to relax the electric field concentration of the main circuit fixing body 130.

10 and 11, the insulating cap 201 may be configured in a disk shape having a predetermined thickness.

The insulating cap 201 may be configured to have an outer diameter that can be inserted into the hollow 112.

The insulating cap 201 may include a semiconducting portion 211 in contact with the main circuit fixing body 130 and an insulating portion 203 disposed outside the semiconducting portion 211. .

Here, the semiconducting portion 211 may be made of semiconducting silicon having a resistance of several kiloohms to several tens of kiloohms. As a result, the concentration of the electric field at the end of the main circuit stabilizer 130 can be suppressed. Here, the semiconductive silicon may be constituted by a method of adding a predetermined (suitable) amount of conductive compound (for example, carbon black, etc.) to silicon (resin), which is an insulating member, in order to achieve semiconductivity. remind

The insulating part 203 may be made of insulating silicon.

The insulation portion 203 may be disposed outside the semiconducting portion 211.

The insulation portion 203 may be configured to surround the semiconducting portion 211 at the outer side of the semiconducting portion 211. As a result, the electric field concentration of the main circuit corrector 130 can be suppressed and the main circuit corrector 130 can be insulated.

The insulating cap 201 may be formed by a double molding method in which the semiconducting portion 211 is first formed and the insulation portion 203 is formed later on the outer side of the semiconducting portion 211.

On the other hand, as shown in Figure 11, at the separation position, the insulating portion 203 and the semi-conducting portion 211 is to be configured to be arranged along the radial direction to be in contact with the end of the main circuit fixing body 130 simultaneously Can be.

In addition, at the separation position, the first movable conductor 151 may be configured such that an end thereof contacts the semiconducting portion 211.

The insulator 203 may have a lead screw hole 205 formed therein so that the lead screw 161 can be rotatably inserted in the center thereof.

One side of the insulating portion 203 may be formed so that the rotating plate inserting portion 207 is recessed so that one side of the rotating plate 191 may be inserted into a predetermined depth. The rotating plate inserting portion 207 may be formed to extend in a radial direction on one side of the lead screw hole 205.

The semiconducting portion 211 may have a circular ring or tube shape.

The semiconducting portion 211 may be configured to protrude further to a predetermined width (t) toward the main circuit stabilizer 130 or the movable contact 150 side than the end portion of the insulating portion 203. As a result, the contact force or adhesion between the semiconducting portion 211 and the main circuit fixing body 130 may be enhanced when the semiconducting portion 211 and the main circuit fixing body 130 come into contact with each other.

Inside the semiconducting portion 211, a space portion extended outward in a radial direction may be formed in comparison with the lead screw hole 205. As a result, unnecessary interference between the second movable conductor 155 and the insulating cap 201 may be suppressed when the movable contact 150 is driven.

In this configuration, when the movable contactor 150 is to be brought into contact with the fixed contactor 140, power is applied to the drive motor 171, and the rotational force of the drive motor 171 is controlled by the plurality of gears. 173, it is transmitted to the insulating power transmission unit 180 through the electric shaft member 175.

More specifically, the rotating plate 191 may be simultaneously rotated by the electric shaft member 175, and the lead screw 161 having one end coupled to the rotating plate 191 may be simultaneously rotated.

When the lead screw 161 starts to rotate, the female screw portion 165 is moved toward the fixed contact 140 along the axial direction. The second movable conductor 155 and the first movable conductor 151 protrude from the second fixed body 135 and extend, and the movable contact 157 of the second movable conductor 155 is the fixed contactor ( It is inserted into the inside of the 140 to contact the fixed contact 144. As a result, the main circuit stabilizer 130, the movable contact 150 and the fixed contact 140 may be in a state capable of energizing each other.

At this time, the insulating cap 201 is in contact with the end of the main circuit fixing body 130 (more specifically, the second fixing body 135) so that the electric field of the main circuit fixing body 130 is the main circuit fixing body 130. Concentration at the end of

More specifically, when the electric field of the power supply unit is concentrated at the end of the main circuit homogenizer 130, the ground (0) potential region, for example, the surface of the body 110 and / or the insulating power transmission unit 180. Surface (), etc.) may cause a discharge (partial discharge), due to which the forced deterioration is promoted, resulting in insulation breakdown.

The insulating cap 201 according to an embodiment of the present invention by the semi-conducting portion 211 is in contact with the main circuit fixing body 130 to alleviate the occurrence of electric field concentration at the end of the main circuit fixing body 130 In addition, discharge due to electric field concentration at the end of the main circuit stabilizer 130 can be effectively suppressed.

On the other hand, when the movable contact 150 is to be separated from the fixed contact 140, if the lead screw 161 is rotated as described above, the female screw portion 165 from the fixed contact 140 Move away As a result, the movable contact 157 may be separated from the fixed contact 144 and spaced apart from each other.

In the above, specific embodiments of the present invention have been shown and described. However, the present invention can be embodied in various forms without departing from the spirit or essential features thereof, so the embodiments described above should not be limited by the details of the detailed description.

Further, even when the embodiments not listed in the detailed description have been described, it should be interpreted broadly within the scope of the technical idea defined in the appended claims. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

110: body 112: hollow
130: main circuit high body 131: first high body
132: second high precision body 140: fixed contact
141: housing 144: fixed contact
145: insulating spacer 150: movable contact
151: first movable conductor 155: second movable conductor
157: movable contact 160: movable contact drive unit
161: lead screw 163: male thread
165: female thread portion 171: drive motor
180: insulated power transmission unit 181: casing
191: rotating plate 193: insertion portion
194: protrusion 195: insulation plate
201: insulation cap 203: insulation
205: lead screw hole 207: rotary plate insert
211: all semi-conductivity

Claims (12)

A hollow body;
A main circuit fixed conductor disposed inside the hollow;
A fixed contact disposed to be spaced apart from the main circuit fixed conductor;
One side is connected to the main circuit fixed conductor and the other side is movable contact for moving between a connection position connected to the fixed contactor and a separation position separated from the fixed contactor; And
And an insulating cap formed of an elastic member and disposed inside the hollow and in contact with the main circuit fixed conductor to suppress electric field concentration.
The insulation cap is:
A semiconducting portion in contact with the main circuit fixed conductor; And
Switch module of a solid insulated switchgear comprising a; insulating portion disposed on the outside of the semi-conducting portion. delete The method of claim 1,
And the semiconducting portion is made of semiconductive silicon, and the insulating portion is made of insulating silicon. The method of claim 1 or 3, wherein the movable contact is:
A first movable conductor contacting the inner surface of the main circuit fixed conductor and protrudingly received; And
And a second movable conductor contacting the inner surface of the first movable conductor and protrudingly received therein. The method of claim 4, wherein
And the insulating part and the semi-conductive part are disposed along the radial direction at the same time to be in contact with the end portion of the main circuit fixed conductor at the separation position. The method of claim 4, wherein
And the first movable conductor has an end portion in contact with the semiconducting portion at the separation position. The method of claim 4, wherein
The semiconducting portion is a switch module of a solid insulated switchgear, characterized in that configured to protrude more toward the main circuit high conductor side than the insulating portion. The method of claim 4, wherein
And a movable contactor driving part for driving the movable contactor between the connection position and the disconnection position. The method of claim 8, wherein the movable contact driving unit:
A lead screw having a male screw portion and rotatably disposed in the hollow;
A female screw portion provided in the movable contactor and screwed to the male screw portion; And
Switch module of a solid insulated switchgear including a drive motor for generating a driving force for rotating the lead screw. 10. The method of claim 9,
The switch module of the solid state insulating switchgear further comprising an insulated power transmission unit for transmitting the driving force of the drive motor to the lead screw. The method of claim 10,
The insulating power transmission unit, the rotating plate is engaged with the lead screw to rotate; And a casing disposed at an outer side of the rotating plate to support the rotating plate to enable insulation.
The switch module of the solid insulation switch gear, characterized in that the insulator is provided with a rotary plate insert so that one region of the rotary plate can be inserted. The method of claim 11,
On one side of the rotating plate is formed an insertion portion into which the end of the lead screw is inserted, the other side of the rotating plate is a switch module of a solid insulated switch gear, characterized in that the protruding portion is formed so as to be inserted into the insertion portion of the other rotating plate. .

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