JP4971267B2 - Switchgear busbar connection device - Google Patents

Description

  The present invention relates to a switchgear busbar connection device and a busbar connection method therefor, and more particularly to a switchgear busbar connection device and a busbar connection method therefor that enable quick and easy assembly between panels.

As shown in FIG. 12, the switchgear includes a plurality of panels 10 arranged in a row. Inside the upper part of each panel 10, as shown in FIG. 13, a bus bar (bus bar) 21 for electrically connecting each panel 10 is installed along the row direction, and the bus bar 21 is installed. The internal space is filled with sulfur hexafluoride (SF ₆ ) gas as an insulating material. Through holes 12 are formed in both side walls of each panel 10, and each through hole 12 is hermetically blocked by a bushing 31.

  The bushing 31 is formed of an insulator, and as shown in FIG. 14, a connecting conductor 33 is provided at the center of the bushing 31 so that each end of the bus bar 21 is connected. Female threaded portions 35 are formed at the ends of the connecting conductors 33 arranged inside each panel 10 so as to connect and support the bus bar 21 with bolts. A contact point 37 protruding outward in the radial direction is formed at the end of the connecting conductor 33 facing the outside of the panel 10.

  A connection contact 41 is coupled between the two bushings 31 adjacent to each other by the row so that each coupling conductor 33 is electrically connected. A hollow insulating tube 45 formed of an insulating material such as silicone is coupled to the outside of the connection contact 41 as shown in FIG.

  As shown in FIG. 16, the connection contact 41 is formed of a bar-shaped conductor, and is coupled to a plurality of contact pieces 42 arranged in an annular shape and both ends of the plurality of contact pieces 42, and is connected to each contact piece 42. And a plurality of ring-shaped springs 43 that urge the conductor 33 so as to contact the contact point of the conductor 33 with a predetermined contact pressure. Each bushing 31 is formed with a receiving portion 34 that is recessed inward along the direction of the rows so that each end of the connection contact 41 and the insulating tube 45 can be combined and received.

  However, in such a conventional switchgear, the size is much smaller than that of the panel 10, and the two adjacent panels 10 are electrically connected by using the connection contact 41 and the insulating tube 45 that require precise assembly tolerances. Therefore, there is a problem that much time and effort are required to align the connection contact 41 and the connection conductor 33.

  In addition, since the relative positions of the connecting conductor 33 and the connecting contact 41 that require precise assembly tolerances are easily changed even by a relatively small external force, the reliability of the device itself is generally reduced such that the sense of stability of the contact point is reduced. There is a problem of reducing the degree.

  Since the bus bar 21 is filled with sulfur hexafluoride gas as an insulating material, it is necessary to discharge and fill the sulfur hexafluoride gas when the panel 10 is inspected and repaired. There is a problem that the time and effort required for repair increase and the cost increases.

  The present invention has been proposed to solve the above-described problems, and an object of the present invention is to provide an environment-friendly switchgear that can eliminate the use of sulfur hexafluoride gas by using a solid insulation system. An object of the present invention is to provide a bus bar connecting device and a bus bar connecting method thereof.

  Another object of the present invention is to provide a switchgear and a method for connecting the busbars thereof, which enable quick and easy assembly between panels.

  In order to achieve the object of the present invention as described above, the present invention includes a first conductor, a second conductor having a central portion coupled to the first conductor, and the first conductor and the outside of the second conductor. A connection module including a solid covering portion surrounding the conductor, a solid cover portion surrounding the conductor, and a bus bar interposed between two adjacent connection modules so as to be energized; the connection module; and Provided is a switchgear busbar connecting device including an insulating tube surrounding a connecting portion with a bus bar.

  Here, a plug-type contact portion is formed on one of the end portion of the second conductor and the end portion of the bus bar, and a socket-type contact portion is formed on the other side so that the plug-type contact portion is inserted. Is done.

  The socket-type contact portion is detachably formed.

  A coupling part is formed on the second conductor so that the socket-type contact part is coupled.

  The insulating tube includes a cylindrical insulating layer and a ground layer formed outside the insulating layer.

  An outer insulating inclined surface is formed on the solid coating corresponding to both ends of the second conductor, and an inner insulating inclined surface is in contact with the outer insulating inclined surface on one side of the insulating layer of the insulating tube. Is formed.

  Both ends of the ground layer further extend in the longitudinal direction as compared with the insulating layer.

  External insulation surfaces are formed in both end regions of the solid coating portion of the bus bar, and a grounding layer is formed between the external insulation surfaces.

  The solid coating portion of the connection module further includes a ground layer formed in a region excluding the external insulating inclined surface.

  The insulating module further includes an insulating cover for blocking a side where the bus bar is not connected among both ends of the second conductor of the connection module.

  The insulating cover includes an insulating layer coupled to an end portion of the second conductor and a semiconductive layer formed inside the insulating layer so as to be in contact with the second conductor.

  The insulating cover further includes a ground layer formed on an outer surface of the insulating layer.

  A tube fixing unit for fixing the insulating tube is further included.

  The tube fixing unit is formed of a rigid member, and further includes a tube housing member that can house the insulating tube therein, and a fastening member that fastens two adjacent tube housing members.

  A cover fixing unit for fixing the insulating cover is further included.

  Here, the cover fixing unit is formed of a rigid member, and includes a cover housing member that can house the insulating cover therein, and a fastening member that fastens the tube housing member adjacent to the cover housing member.

  The bus bar is inserted laterally in the longitudinal direction between two adjacent connection modules.

  Furthermore, in order to achieve the object as described above, the present invention provides a first conductor, a second conductor whose central portion is connected to the first conductor, and a solid coating that surrounds the outside of the first conductor and the second conductor. Forming a connection module including a portion, a bus bar including a conductor and a solid coating portion surrounding the conductor, and an insulating tube surrounding a connection portion between the connection module and the bus bar, Installing each connecting module inside the corresponding panel; coupling the insulating tube to the bus bar; and connecting both ends of the bus bar to the second conductor of the corresponding connecting module of the panels to be connected to each other. And providing a switchgear busbar connection method including the step of disposing the insulating tube so as to surround a connection portion between the connection module and the bus bar. That.

  Here, the step of forming the connection module and the bus bar includes forming a plug-type contact portion at one of an end portion of the second conductor of the connection module and an end portion of the bus bar, and the plug-type contact portion on the other side. The method further includes forming a socket-type contact portion so that the portion is inserted.

  The method further includes the step of insulating a region of the second conductor of the connection module where the bus bar is not connected before or after the step of disposing the insulating tube.

  The method further includes fixing the insulating tube after the step of disposing the insulating tube.

  According to the present invention, the bus bars are coupled in the longitudinal direction between the coupling modules to be coupled, and the insulation tube is provided for insulating the coupling region, so that the assembly tolerance can be reduced when the panels are coupled. Unlike conventional methods, which require a great deal of time and effort for alignment due to the large tolerances, the panels can be connected quickly and easily.

  Further, according to the present invention, the insulating tube is formed of an insulating material having elasticity such as silicone resin, and the inner insulating inclined surface is formed on the inner side so as to correspond to the outer insulating inclined surface of the connecting portion of the connection module. By forming and forming a horizontal insulating surface so as to correspond to the horizontal insulating surface of the bus bar on the other side, each is closely bonded with a predetermined pressure, so that not only the insulation resistance is improved The creepage distance for insulation can be minimized, and the time and cost can be greatly reduced during production and maintenance.

  Also, according to the present invention, the insulating tube and the insulating cover are formed of an insulating silicone resin having elasticity, and the insulating tube and the insulating cover can be continuously maintained in a state where the insulating tube and the insulating cover are crimped to the connecting module and the bus bar. A tube housing member and a cover housing member formed of a rigid member are coupled to the outside of the tube and the insulating cover, and vibration is generated by fastening the tube housing members and between the tube housing member and the cover housing member with a fastening member. Even if it occurs, since the crimped state can be maintained, it is possible to prevent a decrease in insulation performance.

  In addition, according to the present invention, high insulation performance can be maintained in the air by the connection module, the bus bar, and the insulation tube, so that it is not necessary to use an insulation material such as oil or gas. Accordingly, since the time required for discharging and filling the insulating material during the maintenance and repair of the panel can be shortened, the panel can be installed and maintained and repaired more quickly and easily. In addition, since an insulating material such as oil or gas is not used, the mutual contact area of the panels can be maintained in an open state, and there is no need to install partition walls between the panels.

  Hereinafter, a switchgear busbar connection device and a busbar connection method thereof according to an embodiment of the present invention will be described in detail.

  As shown in Fig. 1, the switchgear receives power and supplies power to the load, relaying and measuring the main circuit bus, separating the main circuit bus, and connecting the bus in the case of a double bus line. In order to perform functions and the like, a plurality of panels 110 arranged in rows are provided. Each panel 110 is electrically connected by a switchgear busbar connection device 120 according to an embodiment of the present invention provided in an upper region inside.

  As shown in FIGS. 2 and 3, the switchgear busbar connection device 120 according to the present invention has a first conductor 123 connected at one end to a disconnector or a ground switch, and a central portion connected to the first conductor 123. And the second conductor 127 of the connection module 121 provided with both ends thereof adjacent to each other, and the connection module 121 provided with the solid covering portion 131 surrounding the outside of the first conductor 123 and the second conductor 127, respectively. The bus bar 161 provided with the solid coating | coated part 169 surrounding the circumference | surroundings of the conductor 163 and the conductor 163 which are connected, and the insulation tube 171 which surrounds the connection part of the connection module 121 and the bus bar 161 for insulation are included.

  A socket-type contact 151 is interposed between the connection module 121 and the bus bar 161. An insulating cover 181 is coupled to an end of the second conductor 127 of the connection module 121 that is not connected to the bus bar 161. The insulating tube 171 and the insulating cover 181 are fixed by a tube fixing unit 191 and a cover fixing unit 211, respectively.

  As shown in FIG. 4, the connection module 121 includes a first conductor 123 whose one end is connected to the disconnector or grounding switch of each panel 110, and is arranged at a right angle to the other end of the first conductor 123. A second conductor 127 whose parts are connected to be energized, an epoxy resin having a predetermined thickness outside the first conductor 123 and the second conductor 127 to insulate the first conductor 123 and the second conductor 127 And a solid covering portion 131 formed of an insulating material. In the present embodiment, the solid coating portion 131 is formed in a straight line, but may be formed by bending according to the installation position.

  A connection recess 124 is formed at one end of the first conductor 123 so that a disconnector or a ground switch can be connected. The socket-type contact 151 is detachably inserted at both ends of the second conductor 127. In this manner, the concave coupling portions 128 are formed. Each coupling portion 128 is formed with a female screw portion 129 so that the socket-type contact portion 151 is fastened by a fixing bolt 157.

  A first connection portion 133 is formed at a position of the solid covering portion 131 corresponding to one end region of the first conductor 123 so that a disconnector or a ground switch can be connected to the first conductor 123. Second connection portions 135 are formed in both end regions of the second conductor 127 so that the insulating tube 171 can be connected when the bus bar 161 is connected. The second connecting portion 135 includes an external insulating inclined surface 136 that is inclined at an internal angle θ of 110 degrees to 120 degrees and has a predetermined insulating distance (for example, 50 mm). In the solid coating portion 131, a ground layer 137 is formed in a region excluding the external insulating inclined surface 136 of the second connection portion 135. The ground layer 137 is formed by melting a conductive metal member on the outer surface by a method such as metalizing or metal spraying.

  As shown in FIG. 5, the socket-type contact portion 151 is a conductor, and is formed in a rod shape so that one end portion can be inserted into and coupled to the coupling portion 128 formed on the second conductor 127. An insertion groove 153 is formed at the other end of the socket-type contact 151 so as to be inserted into a region of the bus bar 161, that is, a plug-type connection 165 of the bus bar 161 described later. A bolt hole 155 is formed through the bottom of the insertion groove 153 so that a fixing bolt (157 in FIG. 2) coupled to the female screw portion 129 of the second conductor 127 passes therethrough.

  As shown in FIG. 6, the bus bar 161 includes a conductor 163 connected to the second conductor 127 of the connection module 121 and a solid coating that is formed of an insulating material such as epoxy resin for insulating the conductor 163 and surrounds the conductor 163. Part 169. The conductor 163 has a diameter D2 at both ends larger than the diameter D1 at the center, and the solid covering portion 169 is formed around the conductor 163 with a predetermined thickness t. A grounding layer 170 is formed on the outer surface of the solid covering portion 169, and the grounding layer 170 is formed shorter than the solid covering portion 169 so that external insulating surfaces 168 having a predetermined length can be formed at both ends of the solid covering portion 169, respectively. Is done. At both ends of the conductor 163, plug-type contact portions 165 are formed that protrude so as to be inserted into the insertion groove 153 of the socket-type contact portion 151 and coupled. A plurality of contacts 167 protruding outward from the periphery are formed on the side of the plug-type contact 165.

  As shown in FIG. 7, the insulating tube 171 includes an insulating layer 173 formed so that the connecting region is accommodated therein for insulating the connecting region between the connecting module 121 and the bus bar 161, and an insulating layer 173. A grounding layer 177 formed on the outside. The insulating layer 173 is formed in a cylindrical shape with an insulating material such as an insulating silicone resin, and the ground layer 177 is formed with a conductive silicone resin.

  An inner insulating inclined surface 174 is formed on one side of the insulating layer 173 so as to be in contact with the outer insulating inclined surface 136 of the connection module 121 and is inclined outward, and on the other side, on the outer surface of the bus bar 161. A horizontal insulating surface 175 is formed so as to come into contact.

  As shown in FIG. 8, the ground layer 177 is formed to extend further in the longitudinal direction from the insulating layer 173 so that both ends thereof are in contact with the ground layer 170 of the bus bar 161 and the ground layer 137 of the connection module 121 when coupled. The The inner surface of the ground layer 177 is an inclined surface 178 so as to be gently arranged with respect to the conductor 163 of the bus bar 161.

  As shown in FIG. 9, the insulating cover 181 is disposed on the inner surface of the insulating layer 183 coupled to the second connection portion 135 of the connection module 121 and the insulating layer 183, and contacts the second conductor 127 to reduce the electric field. And a semiconductive layer 185. An inner insulating inclined surface 184 is formed on the inner surface of the insulating layer 183 so as to be in contact with the outer insulating inclined surface 136 of the second connection portion 135. The insulating layer 183 is formed of an insulating material such as an insulating silicone resin, and the ground layer 187 is integrally formed of the conductive silicone resin or the like outside the insulating layer 183. The ground layer 187 is formed to extend further in the longitudinal direction from the insulating layer 183 so that the ground layer 187 can contact the ground layer 137 of the connection module 121 when coupled.

  On the other hand, a tube fixing unit 191 is provided outside the insulating tube 171 so as to fix the insulating tube 171. As shown in FIGS. 2 and 3, the tube fixing unit 191 includes a tube housing member 193 formed in a cylindrical shape so that the insulating tube 171 is housed therein, and a fastening member for fastening the tube housing member 193. 203.

  As shown in FIG. 10, the tube housing member 193 is formed of a rigid member such as a metal member and has a cylindrical shape so that the insulating tube 171 can be prevented from being deformed outward. A passage hole 194 is formed through the tube housing member 193 so that the bus bar 161 passes therethrough. A flange portion 195 extending outward in the radial direction and spaced apart in the circumferential direction is formed at one end portion of the tube housing member 193, and a through hole 197 is formed in each flange portion 195.

  Referring to FIGS. 2 and 3, the fastening member 203 is coupled to a first fixing member 204 that is formed long so that two adjacent tube housing members 193 can be fastened, and an end of the first fixing member 204. A second fixing member 205. In the present embodiment, the first fixing member 204 is configured by a fixing bolt having a male screw portion formed at the end, and the second fixing member 205 is configured by a nut coupled to the male screw portion. Here, a fastening groove may be formed at the end of the first fixing member instead of the male screw portion, and the second fixing member may be constituted by a snap ring coupled to the fastening groove. Further, the fastening member can be constituted by a rivet.

  A cover fixing unit 211 is provided outside the insulating cover 181 so as to fix and maintain the insulating cover 181. The cover fixing unit 211 includes a cover housing member 213 having a cylindrical shape so that the insulating cover 181 is housed therein, and a fastening member 223 for fixing the cover housing member 213.

  As shown in FIG. 11, the cover housing member 213 has a cylindrical shape that is formed of a rigid member, for example, a metal member so that deformation to the outside of the insulating cover 181 can be suppressed, and one side is opened. A plurality of flange portions 215 projecting outward along the radial direction and spaced apart along the circumferential direction are formed at the blocking-side end portion of the cover housing member 213. The flange portion 215 is formed at a position corresponding to the flange portion 195 of the tube housing member 193 in consideration of fastening with the tube housing member 193 disposed so as to face the flange portion 215, and has a through hole 217. Referring to FIG. 2, the fastening member 223 of the cover fixing unit 211 includes a first fixing member 224 and a second fixing member 225 configured by fixing bolts and nuts, similarly to the fastening member 203 of the tube fixing unit 191. .

  When the connection module 121, the bus bar 161, and the insulating tube 171 are formed by such a configuration, the connection module 121 is connected and installed to a disconnector or a grounding switch inside the corresponding panel 110. A socket-type contact 151 is coupled to the connection module 121 of each panel 110. Here, the socket type contact portions 151 are not coupled to the outer end portions of the connection modules 121 arranged in the first panel 110 and the last panel 110 in the row direction.

  The panel 110 is arranged so that the two side portions of the two panels 110 to be connected are in contact with each other, and the bus bar 161 is inserted and coupled between the two connection modules 121 arranged to face each other. Here, to each bus bar 161, two tube accommodating members 193 each having an insulating tube 171 inserted therein are coupled first. In a state where the tube housing member 193 is coupled, each plug type contact portion 165 is inserted in a state of being aligned with the direction of the insertion groove 153 of each socket type contact portion 151.

  When the coupling of the bus bars 161 is completed, each tube housing member 193 is pressurized so that the inner insulating inclined surface 174 of each insulating tube 171 presses against the outer insulating inclined surface 136 of the second connecting portion 135 of each connecting module 121. Next, the first fixing member 204 is inserted into the through-hole 197 of the flange portion 195 of each tube housing member 193, and the second fixing member 205 is fastened to the end portion thereof, so that each insulating tube 171 corresponds to the second connection. The state of being crimped to the part 135 is maintained.

  On the other hand, a cover accommodating member 213 in which an insulating cover 181 is accommodated is coupled to each outer second connection portion 135 of the coupling module 121 that is arranged on both sides along the row direction and to which the bus bar 161 is not coupled. To insulate. The cover housing member 213 inserts the first fixing member 224 into the through-hole 217 of each flange portion 215 in a state where the flange portion 195 of the tube housing member 193 coupled to the other end and the flange portion 215 coincide with each other. And combine. Next, by fastening the second fixing member 225 to the end portion of the first fixing member 224 in a state where the inner insulating tube 171 and the insulating cover 181 are pressurized so as to be crimped to the corresponding second connection portion 135. The cover housing member 213 and the tube housing member 193 are fixed.

It is a figure which shows the use condition of the bus-bar connection apparatus of the switch gear by one Embodiment of this invention. It is sectional drawing of the II-II line of the bus-line connection apparatus of FIG. FIG. 3 is an exploded perspective view of FIG. 2. It is an enlarged view of the connection module of FIG. It is a fragmentary sectional view of the socket type contact part of FIG. It is an enlarged view of the bus bar of FIG. It is an enlarged view of the insulating tube of FIG. It is an enlarged view of the insulation tube coupling | bond area | region of FIG. It is an enlarged view of the insulating cover of FIG. It is an enlarged view of the tube accommodating member of FIG. It is an enlarged view of the cover accommodating member of FIG. It is a perspective view which shows the panel board state of the panel of the conventional switchgear. It is a figure which shows the connection state of the bus bar of FIG. It is sectional drawing of the XIV-XIV line | wire of FIG. It is a perspective view of the insulating member of FIG. FIG. 15 is a perspective view of the connection contact of FIG. 14.

Explanation of symbols

DESCRIPTION OF SYMBOLS 120 Busbar connection apparatus 121 Connection module 123 1st conductor 127 2nd conductor 131 Solid coating | cover part 151 Socket type contact part 155 Bolt hole 157 Fixing bolt 161 Bus bar 163 Conductor 169 Solid coating | coated part 171 Insulation tube 191 Tube fixing unit 193 Tube accommodating member 203 Fastening member 204 First fixing member 205 Second fixing member 211 Cover fixing unit 213 Cover housing member 223 Fastening member 224 First fixing member 225 Second fixing member

Claims (5)

A connection module comprising a first conductor, a second conductor having a central portion connected to the first conductor, and a solid coating portion surrounding the first conductor and the second conductor;
A bus bar comprising a conductor and a solid covering portion surrounding the conductor, and being interposed between two adjacent connection modules so as to be energized;
An insulating tube surrounding a connection portion between the connection module and the bus bar;
An insulating cover for blocking a side where the bus bar is not connected among both ends of the second conductor of the connection module;
Including
A plug-type contact portion is formed on one of the end portion of the second conductor and the end portion of the bus bar, and a socket-type contact portion is formed on the other side so that the plug-type contact portion is inserted,
The socket-type contact portion is detachably formed,
A coupling part is formed on the second conductor so that the socket-type contact part is coupled,
The insulating tube includes a cylindrical insulating layer, and a ground layer formed outside the insulating layer,
Both ends of the ground layer further extend in the longitudinal direction compared to the insulating layer ,
The switch includes an insulating layer coupled to an end portion of the second conductor, and a semiconductive layer formed inside the insulating layer so as to contact the second conductor. Gear busbar connection device. The switchgear busbar connection device according to claim 1 , wherein the insulating cover further includes a grounding layer formed on an outer surface of the insulating layer. A connection module comprising a first conductor, a second conductor having a central portion connected to the first conductor, and a solid coating portion surrounding the first conductor and the second conductor;
A bus bar comprising a conductor and a solid covering portion surrounding the conductor, and being interposed between two adjacent connection modules so as to be energized;
An insulating tube surrounding a connection portion between the connection module and the bus bar;
An insulating cover for blocking a side where the bus bar is not connected among both ends of the second conductor of the connection module;
A tube fixing unit for fixing the insulating tube;
Including
A plug-type contact portion is formed on one of the end portion of the second conductor and the end portion of the bus bar, and a socket-type contact portion is formed on the other side so that the plug-type contact portion is inserted,
The socket-type contact portion is detachably formed,
A coupling part is formed on the second conductor so that the socket-type contact part is coupled,
The insulating tube includes a cylindrical insulating layer, and a ground layer formed outside the insulating layer,
Both ends of the ground layer further extend in the longitudinal direction compared to the insulating layer,
The tube fixing unit is formed of a rigid member, wherein the tube containing member an insulating tube can be accommodated inside, features and be away Itchigia further comprising a fastening member for fastening two adjacent tubes accommodating member Busbar connection device. The switchgear busbar connection device according to claim 3 , further comprising a cover fixing unit for fixing the insulating cover. The cover fixing unit is formed of a rigid member, and includes a cover housing member that can house the insulating cover therein, and a fastening member that fastens the tube housing member adjacent to the cover housing member. bus connection device switchgear according to claim 4.

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