JP2011036035A - Distribution panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent malfunction by suppressing an excessive increase in a temperature of branch breakers by suppressing a local increase in temperature in the vicinity of a part where the branch breakers are connected in conductive bars. <P>SOLUTION: A distribution panel includes: a trunk breaker 2; three long conductive bars 4A-4C electrically connected to load side terminals 2b<SB>1</SB>-2b<SB>3</SB>of the trunk breaker 2 respectively via jumper wires 3, and disposed oppositely to each other via gaps 19 along a thickness direction; a plurality of branch breakers 7 juxtaposed in a longitudinal direction of the conductive bars 4A-4C and connected to the conductive bars 4A-4C, respectively; and a hollow box-like casing 11 for housing the trunk breaker 2, the conductive bars 4A-4C and the branch breakers 7. The conductive bars 4A-4C each includes: a pipe member 41 having a hollow part 41a: a hydraulic fluid 42 to be enclosed in the hollow part 41a of the pipe member 41; and a wick 43 which is provided in the hollow part 41a of the pipe member 41 and moves the hydraulic fluid 42 by a capillary force. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a distribution board.

  Conventionally, the main breaker, feed line, conductive bar, and branch breaker are housed in the housing, and the branch breaker is plugged in to a plurality of conductive bars arranged facing each other in the thickness direction. A distribution board having a structure in which a load-side terminal of a main breaker and a conductive bar are electrically connected via a feed wire is provided (see, for example, Patent Document 1).

JP 2002-10415 A

  In recent years, the distribution board has become smaller and larger in capacity, and the value of the current flowing through the conductive bar has increased. As a result, the heat generated by the conductive bar has increased, and the heat distribution efficiency has been poor due to the downsizing of the distribution board. It has become a thing. Therefore, there is a risk that the temperature around the conductive bar becomes high and the branch breaker connected to the conductive bar malfunctions.

  The present invention has been made in view of the above-described reasons, and the object thereof is to suppress a local temperature increase in the vicinity of a location where the branch breaker is connected in the conductive bar, and to prevent a malfunction of the branch breaker. To provide a distribution board.

  According to the first aspect of the present invention, there is provided a main breaker, a plurality of long conductive bars that are electrically connected to the load-side terminals of the main breaker and arranged to face each other with a gap therebetween, A plurality of branch breakers arranged in parallel in the longitudinal direction and connected to the conductive bars, respectively, and formed into a hollow box shape having one open surface, and a housing for accommodating the breakers, the conductive bars, and the branch breakers, The conductive bar is composed of a long pipe member having a hollow part, a working liquid sealed in the hollow part of the pipe member, and a wick provided in the hollow part of the pipe member to move the working liquid by capillary force. It is characterized by being.

  According to this invention, since the conductive bar has a function of a heat pipe and a local temperature rise near the branch breaker in which a large current flows in the conductive bar is suppressed, an excessive temperature rise of the branch breaker is suppressed. Malfunction can be prevented.

  Further, since the conductive bar is formed in a hollow shape, the raw materials can be reduced by the amount corresponding to the hollow portion, and the cost can be reduced.

  According to a second aspect of the present invention, in the first aspect of the present invention, the conductive bar is provided with a solid plate at one end in the longitudinal direction, and a screw hole is drilled at one end of the solid plate so as to be a main breaker. A screw fastening portion electrically connected to the load side terminal is formed, and a joining portion joined to the conductive bar is formed on the other end side of the solid plate.

  According to the present invention, it is not necessary to provide a screw hole in the hollow conductive bar, and the conductive bar is connected to the load-side terminal of the main breaker via the solid plate having a higher strength than the conductive bar by not having the hollow portion. By electrically connecting the two, the connection strength is increased and the conductive bar can be safely assembled.

  A third aspect of the present invention is characterized in that, in the first or second aspect of the present invention, the conductive bar is integrally formed with a solid portion where the branch breaker is plugged in at an end portion in the short direction.

  According to the present invention, the solid part having higher strength than the hollow part is integrally formed and the branch breaker is plug-in connected to the solid part, so that the connection strength is increased and the branch breaker is safely connected. Desorption can be performed.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, one surface of the conductive bar faces the opening of the housing, and the conductive bar is disposed between the other surface of the conductive bar and the housing. An insulating heat transfer member for transferring the heat generated in step 1 to the housing side is interposed.

  According to this invention, the heat generated in the conductive bar is transmitted to the casing having a large heat dissipation area via the heat transfer member, so that the heat dissipation efficiency of the conductive bar can be further increased.

  As described above, in the present invention, the local temperature rise in the vicinity of the location where the branch breaker is connected in the conductive bar is suppressed, and the excessive temperature rise of the branch breaker is suppressed, thereby preventing malfunction. There is an effect that can be.

The front view of the electricity distribution panel in Embodiment 1 is shown. The AA sectional view of a distribution board same as the above is shown. The schematic of the electrically-conductive bar used with the electricity distribution board in the same as the above is shown. Sectional drawing of the electrically-conductive bar used with the electricity distribution panel in the same as the above is shown. BB sectional drawing of the electricity distribution panel in the same as the above is shown. Sectional drawing of the electrically-conductive bar used with the electricity distribution panel in the same as the above is shown. The D arrow figure of the electricity distribution panel in the same as the above is shown. The schematic of the electrically conductive bar used with the electricity distribution panel in Embodiment 2 is shown.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIGS. 1 and 2, the distribution board in the present invention includes a hollow box-type board body 1, a main breaker 2 disposed inside the board main body 1, and a load-side terminal 2 b (2 b _{1 of the} main breaker 2). To 2b ₃ ) three feed lines (conducting means) 3 each connected to one end, three conductive bars 4 (4A to 4C) each connected to the other end of the feed line 3 and resin, etc. The support member 5 is formed of a non-conductive material and is supported in a state where one end of each of the three conductive bars 4 is insulated, and the other end of the conductive bar 4 is formed of a non-conductive material such as resin. A support base 6 that is supported in an insulated state and a branch breaker 7 that is plug-in connected to the conductive bar 4 are provided. Hereinafter, description will be made with reference to the front-rear direction in FIG.

  First, the panel main body 1 includes a substantially rectangular box-shaped casing 11 having an opening on one surface, and a lid portion 12 having a hinge structure that covers the opening surface of the casing 11.

  Spacers 13 formed in a substantially cylindrical shape with resin or the like are fixed to the four corners of the bottom surface 11 a of the housing 11, and a pair of long brackets 14 that are long in the longitudinal direction of the case 11 are interposed via the spacers 13. Arranged. A plurality of screw holes 14 a are formed in the bracket 14 along the longitudinal direction. Between the pair of brackets 14, substantially rectangular intermediate plates 15 to 17 are spaced at a predetermined interval. Are erected in order. Here, insertion holes 15a to 17a are formed in both end portions of the intermediate plates 15 to 17, respectively, and the screws 18 that pass through the insertion holes 15a to 17a are screwed into the screw holes 14a. The plates 15 to 17 are fixed to the bracket 14.

  The main breaker 2 is installed between the intermediate plates 15 and 16, and one end side (primary side) is fixed to the intermediate plate 15 by screwing, and the other end side (secondary side) is fixed to the intermediate plate 16 by screwing. Is done.

Then, the one end of the main breaker 2, three primary terminals 2a ₁ to 2A region ₃ the power source of the three-wire power line is connected respectively 100 / 200V (not shown) is supplied is arranged at equal intervals Yes. Here, the central primary terminal 2a ₁ is a neutral pole to which a neutral line from an external power source is connected, and the primary terminals 2a ₂ and 2a ₃ on both sides thereof are voltages to which a voltage line from an external power source is connected. It is the pole.

Further, the other end of the main breaker 2, three secondary terminals arranged (load _terminal) 2b 1 _{~2b 3} is at equal intervals which are respectively connected to three conductive bars 4A~4C via the feed line 3 Has been. Here, the central secondary terminal 2b ₁ is a neutral electrode, and the secondary terminals 2b ₂ and 2b _{3 on} both sides thereof are voltage electrodes. Moreover, the substantially center of the front surface of the master breaker 2, conduction between the terminals of the primary terminal _2a 1 to 2A region ₃ and the secondary terminal _2b 1 _{~2b 3,} the operating handle section 2c to switch the cut-off is provided.

Three conductive bars 4 are provided, and the three conductive bars 4 (4A to 4C) are arranged to face each other via a gap 19 along the thickness direction, and the longitudinal direction of the case 11 is It is arranged at the approximate center of the intermediate plate 17 in the longitudinal direction. Here, the conductive bar 4A is disposed between the conductive bars 4B and 4C, and the secondary terminal 2b ₁ (neutral pole) of the main breaker 2 via the feed wire 14 screwed and fixed to the solid plate 44. Used as a neutral electrode bar.

  The conductive bar 4B is disposed on the side closest to the opening surface of the casing 11, and the conductive bar 4C is arranged on the side closest to the bottom surface of the casing 11 (the side closest to the intermediate plate 19).

  At one end in the longitudinal direction of the conductive bar 4, a substantially rectangular solid plate 44 made of copper having a screw hole 44a drilled at one end is provided. The solid plate 44 is formed with a screw fastening portion 441 having a screw hole 44a formed on one end side, and a joining portion 442 connected to one end in the longitudinal direction of the conductive bar 4 by welding or the like on the other end side. Has been. In addition, the solid plate 44 does not have a hollow portion, that is, has a solid interior, and therefore has a higher strength than the hollow conductive bar 4.

  Here, the solid plates 44 of the conductive bars 4 </ b> A to 4 </ b> C are supported and fixed to the support member 5, and the other ends of the conductive bars 4 </ b> A to 4 </ b> C are supported and fixed by the support base 6.

  Further, as shown in FIGS. 3A to 3C and FIG. 4, the conductive bar 4 includes a long pipe member 41 made of, for example, copper and formed hollow, and a hollow of the pipe member 41. A volatile hydraulic fluid 42 (for example, water) sealed in the portion 41a and a wick 43 provided in the hollow portion 41a of the pipe member 41 to move the hydraulic fluid 42 by capillary force, a so-called heat pipe It has a structure. Here, when the hydraulic fluid 42 is sealed in the pipe member 41, the boiling point is lowered by being sealed under reduced pressure, and the hydraulic fluid 42 is easily vaporized due to a temperature rise.

  The wick 43 is provided along the inner wall of the pipe member 41, and is formed in a hollow shape from a porous material. The hydraulic fluid 42 penetrates into the wick 43.

  The support member 5 is fixed to the center of one end side of the intermediate plate 17 with a screw 18 and, as shown in FIG. 5, the solid plates 44 of the conductive bars 4A to 4C are inserted and supported separately in the thickness direction. Each of the solid plates 44 of the inserted conductive bars 4A to 4C is separated and insulated in the thickness direction.

  Here, between the solid plate 44 and the support member 12 in the conductive bars 4A to 4C respectively inserted through the insertion portions 5a of the support member 5, a flat fixing member 21 having a screw groove (not shown) is interposed. The Then, the screw 18 is screwed into the screw groove of the fixing member 21 after the screw 18 is inserted through the crimp terminal 14a provided at the other end of the feed line 3 and the screw hole 44a of each solid plate 44, The conductive bars 4A to 4C and the main breaker 2 are electrically connected via the feed line 3.

The solid plates 44 connected to the conductive bars 4A to 4C are respectively connected to the secondary terminals 2b ₁ , 2b ₂ , 2b ₃ of the main breaker 2 through different feed lines 14 and electrically connected to the secondary terminals 2b _1. The electrically connected bar 4A is used as a neutral electrode bar, and the conductive bars 4B and 4C connected to the secondary terminals 2b ₂ and 2b ₃ are used as voltage electrode bars.

  The support base 6 is made of, for example, ceramic or the like having high insulation and thermal conductivity. As shown in FIG. 7, three groove portions 6a are formed at predetermined intervals in the front-rear direction. The pair of support bases 6 are disposed on the other end side of the intermediate plate 17 with a predetermined interval in a state where the surfaces provided with the groove parts 6a are opposed to each other, and are electrically connected to the groove parts 6a of each support base 6. The long sides of the bars 4A to 4C are fitted with each other. Thereby, the other ends of the conductive bars 4A to 4C are separately insulated in the thickness direction. That is, the conductive bars 4 </ b> A to 4 </ b> C are separated and insulated in the thickness direction by the support member 5 and the support base 6.

  The branch breaker 7 is provided with three power supply side terminal portions 7a connected to the conductive bars 4A to 4C on one end side surface, and three load side terminal portions 7b connected to an external load or the like on the other end side. It is done. The power supply side terminal portion 7a is provided with three cut grooves, and electrodes are provided at any two of the three cut grooves to form a two-pole terminal. Further, on the front surface of the branch breaker 7, there is provided an operation handle portion 7c that conducts and blocks between the terminals of the power supply side terminal portion 7a and the load side terminal portion 7b.

  A plurality of branch breakers 7 are juxtaposed along the longitudinal direction of the conductive bar 3 with the power terminal portions 7a facing each long side of the conductive bars 4A to 4C. A conductive bar 4A for the neutral electrode and a conductive bar 4B for the voltage electrode or a conductive bar 4C for the voltage electrode are plug-in connected to the two electrodes.

  In the distribution board of the present embodiment configured as described above, the current concentrates on one end side of the conductive bar 4 connected to the load side terminal 2b of the main breaker 2 via the feed line 3 and the solid plate 44. The temperature at one end of the bar 4 is likely to rise as compared to the other end.

  However, as shown in FIGS. 3 and 4, since the conductive bar 4 has a heat pipe structure, current is concentrated on one end side (the upper end side in FIG. 6) of the conductive bar 4 and one end of the conductive bar 4. When the temperature on the side rises compared to the other end side, the hydraulic fluid 42 contained in the wick 43 evaporates on one end side in the longitudinal direction of the conductive bar 4 to take heat of vaporization from the conductive bar 4 and suppress the temperature rise.

  The vaporized working fluid 42 moves to the other end side (lower end side in FIG. 6) having a temperature lower than that of one end side of the conductive bar 4 through the hollow portion 43 a surrounded by the wick 43. Then, the vaporized working fluid 42 condenses and returns to the liquid again, releases heat of condensation, and dissipates heat from the other end of the conductive bar 4. Furthermore, the working fluid 42 that has returned to the liquid moves in the wick 43 from the other end side to the one end side by the capillary force of the wick 43.

  Thus, in the distribution board of this embodiment, since the conductive bar 4 has a heat pipe structure, a local temperature rise in the conductive bar 4 near the branch breaker 7 is suppressed. Therefore, the malfunction of the branch breaker 7 can be prevented.

  Further, in the present embodiment, the hollow conductive bar 4 is not provided with a screw hole, and the conductive bar 4 is connected to the load side of the main breaker 2 through a solid plate 44 that is solid and has higher strength than the conductive bar 4. Since it is electrically connected to the terminal 2b, there is no need to provide a screw hole in the hollow conductive bar 4, the connection strength can be increased, and the conductive bar 4 can be assembled safely.

  Further, since the support base 6 that supports the other ends of the conductive bars 4A to 4C is formed of an insulating heat transfer member, the heat generated in the conductive bar 4 can be transferred to a medium having a large heat dissipation area as shown in FIG. By transmitting to the plate 17, the heat dissipation efficiency of the conductive bar 4 can be further increased. In the present embodiment, the support base 6 is formed from an insulating heat transfer member, but the same effect as described above can be obtained even when the support member 5 is formed from an insulating heat transfer member.

(Embodiment 2)
The distribution board of this embodiment will be described with reference to FIG. Note that the distribution board of the present embodiment and the distribution board of the first embodiment differ only in the shape of the pipe member 45 in the conductive bar 4, and the structures common to the first embodiment are denoted by the same reference numerals. Description is omitted.

  As shown in FIG. 8, the conductive bar 4 according to the present embodiment includes a long and substantially rectangular pipe main body 451 formed in a hollow shape and a solid plate formed along the periphery of the main body 451. The pipe member 45 is composed of a real part 452, the hydraulic fluid 42 is vacuum-sealed in the hollow part 45 a of the pipe member 45, and the wick 43 is provided in the hollow part 45 a of the pipe member 45.

  The solid portion 452 has a higher strength than the hollow pipe member 451 provided with the hollow portion 45a because the solid portion 452 is solid.

  Therefore, in the distribution board of this embodiment, when the branch breaker 7 is plugged in to the conductive bar 4, the branch breaker 7 is plugged into the solid portion 452 having a higher strength than the hollow pipe member 451. By connecting, the connection strength can be increased, and the branch breaker 7 can be safely attached and detached.

  In this embodiment, the solid body 44 is joined to the solid portion 452 on the upper end side of the conductive bar 4 for welding or the like. Therefore, the connection strength is improved as compared with the case where the solid body 44 is joined to the hollow main body 451.

2 main breaker _{2b (2b} 1 _~2b 3) the load terminal (secondary terminals)
4 (4A-4C) Conductive bar 5 Support member (heat transfer member)
6 Support stand (heat transfer member)
7 Branch breaker 11 Housing 41 Pipe member 42 Hydraulic fluid 43 Wick 44 Solid plate 441 Screw fastening portion 442 Joining portion 452 Solid portion

Claims (4)

With the main breaker,
A plurality of elongated conductive bars that are electrically connected to the load-side terminals of the main breaker and arranged to face each other with a gap therebetween;
A plurality of branch breakers arranged in parallel in the longitudinal direction of the conductive bar and connected to the conductive bar;
It is formed in a hollow box shape with one side open, and includes a case that houses a breaker, a conductive bar, and a branch breaker,
The conductive bar includes a long pipe member having a hollow part, a working liquid sealed in the hollow part of the pipe member, and a wick provided in the hollow part of the pipe member to move the working liquid by capillary force. A distribution board characterized by comprising. The conductive bar is provided with a solid plate at one end in the longitudinal direction,
A screw hole is formed on one end of the solid plate and a screw fastening portion is formed to be electrically connected to a load side terminal of the main breaker. On the other end of the solid plate, a conductive bar is formed. The distribution board according to claim 1, wherein a joining portion to be joined is formed.   3. The distribution board according to claim 1, wherein the conductive bar is integrally formed with a solid portion where the branch breaker is plugged in at an end portion in a short direction. One surface of the conductive bar faces the opening of the housing, and an insulating heat transfer member that transfers heat generated in the conductive bar to the housing side is interposed between the other surface of the conductive bar and the housing. The distribution board according to any one of claims 1 to 3.

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