JP6578107B2 - Distribution board - Google Patents

Description

  The present invention relates to a distribution board in which a main breaker such as a residential distribution board and a branch breaker are connected by a copper bar.

  2. Description of the Related Art Conventionally, in a distribution board such as a residential distribution board, a main breaker and a plurality of branch breakers are connected by a strip-shaped copper bar. The main part of the copper bar is formed in a straight line, branch breakers to be connected are arranged in a line, and each branch breaker is connected to a connection part provided on the copper bar. Then, one end of the copper bar is connected to the secondary side of the main breaker.

By connecting the main breaker and the branch breaker using the copper bar in this way, it was possible to cope with a relatively large current, but due to an increase in the number of branch breakers accompanying an increase in power consumption in recent years, Heat generation countermeasures for copper bars are required.
For example, in Patent Document 1, heat dissipation efficiency is increased by forming a large number of slits in a copper bar connected to the secondary side of the main breaker through which the largest current flows, thereby increasing the surface area. Moreover, in patent document 2, the space between a main breaker and a branch breaker was expanded, the arrangement | positioning space of the transition bar connected to the main breaker secondary side was expanded, and the big heat dissipation function was provided in the transition bar itself.

JP 2002-171619 A JP 2009-195020 A

  Both the configuration in which many slits are provided and the configuration in which the crossbar has a heat dissipation function have increased the number of members, and the interval between the main breaker and the branch breaker has to be wider than before. The structure has to be changed significantly from the conventional structure.

  Therefore, in view of such problems, the present invention has a structure that can increase the heat dissipation efficiency of the copper bar without increasing the number of members and without changing the arrangement relationship between the main breaker and the branch breaker. The purpose is to provide a distribution board.

In order to solve the above problems, the invention of claim 1, in a plurality of branch breakers that the main breaker and arrayed are connected via a strip-shaped copper bars distribution board, copper bars, two voltage It consists of a phase copper bar and one neutral phase copper bar. The neutral phase copper bar is arranged in the forefront and three copper bars are arranged in the thickness direction of the copper bar. A heat sink is extended from the copper bar to the end of the main breaker side of the straightly formed branch breaker connection region of at least two voltage phase copper bars of the copper bars, and the heat sink is adjacent to the row of branch breakers The heat radiating plate is formed by being bent in an L shape or a U shape in a copper bar arrangement direction orthogonal to the extending direction .
According to this configuration, since the heat radiating plate is provided at the end of the branch breaker connection region formed in a straight line of the copper bar, the heat radiating structure can be constructed without affecting the arrangement relationship between the main breaker and the branch breaker. And since a heat sink can be provided using one branch breaker or several installation space, a big design change is not required from the conventional distribution board. Furthermore, by providing it on the main breaker side, a heat radiating portion can be provided at a portion where current is most concentrated, and heat can be radiated effectively.

In addition, the heat radiating plate is bent within a certain width, so that a large heat radiating area can be secured with a minimum space. When only two voltage phase copper bars are provided with a heat sink, the heat sink can be formed using the region of the neutral phase copper bar, and a large heat dissipation space can be provided. And since a neutral phase copper bar is arrange | positioned in the forefront part, even if there is no heat sink, it can thermally radiate effectively.

The invention of claim 2 is the structure of claim 1, the heat radiating plate is characterized by comprising housed within the insulating frame for insulating the surroundings.
According to this configuration, since the heat radiating plate is surrounded by the insulator, it is not touched during work such as a breaker operation, and the work can be performed with peace of mind.

  According to the present invention, since the heat radiating plate is provided at the end of the branch breaker connection region formed in a straight line of the copper bar, a heat radiating structure can be constructed without affecting the arrangement relationship between the main breaker and the branch breaker. And since a heat sink can be provided using one branch breaker or several installation space, a big design change is not required from the conventional distribution board. Furthermore, by providing it on the main breaker side, a heat radiating portion can be provided at a portion where current is most concentrated, and heat can be radiated effectively.

It is the perspective view which attached the copper bar which comprises the principal part of the distribution board which concerns on this invention to the panel. It is a perspective view of the distribution board which assembled | attached the copper bar and panel of FIG. The copper bar arrange | positioned in the middle is shown, (a) is a front view, (b) is a bottom view, (c) is a left view. The copper bar arrange | positioned in the inner part is shown, (a) is a front view, (b) is a bottom view, (c) is a left view. It is the perspective view which isolate | separated three copper bars from the panel. FIG. 6 is a perspective view of the angle of FIG. 5 with a copper bar assembled to the panel. It is the perspective view which attached the insulating cover to the heat sink shown in FIG. It is a front view of FIG. It is an AA line disconnection enlarged surface view. It is a BB line cutting enlarged surface view. It is block explanatory drawing which shows the connection of the apparatus of the electricity distribution panel shown in FIG.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view in which a copper bar constituting a main part of a distribution board according to the present invention is attached to a panel, and FIG. 2 is a perspective view of the distribution board in which the panel and the copper bar are assembled. The figure seen from the upper part is shown. The distribution board shown here includes a communication terminal 20 that measures generated power data such as solar power generation and power data consumed via each branch breaker and outputs the data to the outside. It has become.

  In the distribution board 1, a panel 3 made of a metal plate is arranged on the back of the cabinet 2, a single-phase three-wire main breaker 4 is arranged on the left side of the panel 3, and a plurality of branch breakers are arranged on the right side thereof. 5 are arranged in a row in the left-right direction in two steps. However, in FIG. 2, the upper branch breaker is omitted.

Three copper bars 10 (10a, 10b, 10c) forming a single-phase three-wire electric circuit are overlapped at the center of the panel 3 between the branch breakers 5 arranged in two upper and lower stages. Arranged in the direction. The front part is a neutral phase, and the middle part and the back part are a voltage phase. A copper bar for connection (not shown) arranged separately is connected to the left end portion of the copper bar 10 and connected to the secondary side of the main breaker 4. And the heat sink is formed in the copper bar 10a, 10b of the middle part and back part which are voltage phase copper bars.
Hereinafter, the open surface direction of the cabinet 2 is the front, the upper side in the figure is the upper side, the middle copper bar 10a is the first copper bar, the back copper bar 10b is the second copper bar, and the frontmost copper bar 10c is the first. This will be described as a three copper bar.

  Hereinafter, the copper bar 10 and the heat sinks 8 and 9 will be specifically described. FIG. 3 shows the first copper bar 10a arranged in the middle, (a) is a front view, (b) is a bottom view, and (c) is a left side view. The three copper bars 10 are copper plates formed in a strip shape elongated in the left-right direction, and form connection sides 13 to which the branch breakers 5 are connected on both upper and lower sides. And as shown in FIG. 3, the heat sink (1st heat sink) 8 formed in the 1st copper bar 10a is formed in the upper left part near the main breaker 4. As shown in FIG.

The first copper bar 10a has a plurality of notches 11 formed at predetermined intervals on the upper connection side 13 and is formed in a comb shape. The individual tongue pieces 12 protruding in a comb shape constitute terminals for connecting the branch breaker 5. The other connection side 13 is a uniform side portion formed in a straight line.
The notch 11 is provided for arranging a current sensor for measuring the branch current (shown in FIG. 5). By providing this notch 11, the effective cross section of the first copper bar 10a becomes small, so heat is easily generated. Therefore, the 1st heat sink 8 is formed as this countermeasure.

The first heat radiating plate 8 is extended from the first copper bar 10a by using a part of the branch breaker arrangement area where the branch breakers 5 are arranged, and is bent backward with a flat portion 8a parallel to the panel 3. And a bent piece 8b.
The flat surface portion 8a is provided with a rising piece 8c formed by bending from the main body of the first copper bar 10a to the front of the cabinet 2, and is formed at substantially the same position as the arrangement surface of the third copper bar 10c arranged at the foremost portion. Has been. Further, the bent piece 8b is bent and extended from the position of the third copper bar 10c to the rear where a sufficient space is formed, and the tip of the bent piece 8b extends to the vicinity of the second copper bar 10b disposed at the back. Yes. Thus, the first heat radiating plate 8 is formed in an L-shaped cross section.

  4A and 4B show the second copper bar 10b disposed in the back, where FIG. 4A is a front view, FIG. 4B is a bottom view, and FIG. 4C is a left side view. As shown in FIG. 4, in the second copper bar 10 b, similarly to the first copper bar 10 a, the heat radiating plate (second heat radiating plate) 9 is formed on the upper left side close to the main breaker 4.

In the second copper bar 10b, a plurality of notches 11 for arranging a current sensor for measuring a branch current in the same manner as the first copper bar 10a are formed on one lower connection side 13 at predetermined intervals. It is formed in a shape. Each of the tongue pieces 12 protruding in a comb shape constitutes a terminal for connecting the branch breaker 5. The other upper connection side 13 is a uniform side formed in a straight line.
Similar to the first copper bar 10a, the notch 11 is provided, so that the effective cross section of the second copper bar 10b becomes small and heat is easily generated. As a countermeasure, the second heat radiating plate 9 is formed.

The second heat radiating plate 9 is extended using a part of the branch breaker arrangement area in the same manner as the first copper bar 10a, and is formed at the same position as seen from the front so as to overlap the first heat radiating plate 8. Yes. And it arrange | positions in parallel so that the plane part 9a extended in parallel with the panel 3 from the side part of the 2nd copper bar 10b main body, the side piece 9b bent forward, and the plane part 9a through the side piece 9b may overlap. And the bent piece 9c.
The bent piece 9c is arranged at a position substantially equal to the first copper bar 10a, and the second heat radiating plate 9 is formed in a U-shaped cross section.

  In addition, as shown in FIG. 1, the connection part with the branch breaker 5 of the 3rd copper bar 10c which is a neutral phase copper bar is the connection side 13 in which the upper and lower sides were formed with the uniform straight line. Therefore, the 3rd copper bar formed by the same width as the 2nd copper bar 10a and the 3rd copper bar 10b has a wide current passage area by not having a notch.

FIG. 5 shows a perspective view of the copper bar 10 separated from the panel 3. FIG. 6 shows a view in which the copper bar 10 is assembled to the panel 3. FIG. 6 shows the same angle as FIG. In FIG. 5, 21 is provided with a current sensor inserted into a notch 11 formed in the first copper bar 10a and the second copper bar 10b, and a communication terminal 20 for outputting the measurement result to the outside at the end. The current sensor substrate 21 is disposed between the first copper bar 10a and the second copper bar 10b.
As shown in FIG. 6 (or FIG. 1 and FIG. 2), in the state assembled to the panel 3, the first heat radiating plate 8 and the second heat radiating plate 9 overlap and are arranged at the same site. However, at this time, the bent portions are formed so as not to contact each other.

  FIG. 7 is a perspective view similar to FIG. 1 in which the copper bar 10 is attached to the panel 3, but shows a state in which the protective case 22 is attached to the stacked first heat sink 8 and second heat sink 9. . Since the heat sinks 8 and 9 are disposed adjacent to the branch breaker 5 and are normally in a charged state, they are easy to touch. Therefore, it is covered with a protective case 22 as shown in FIG. The protective case 22 is formed of a synthetic resin that is an insulator and has a rectangular tube shape. Moreover, it has the side surface which obstruct | occludes front and rear, right and left, and the top | upper surface 22a provided with the some opening part 23 formed in the grid | lattice form.

8 shows a front view of FIG. 7, FIG. 9 shows an enlarged sectional view taken along line AA in FIG. 8, and FIG. 10 shows an enlarged sectional view taken along line BB in FIG. As shown in FIG. 9, the overlapped first heat radiating plate 8 and second heat radiating plate 9 form a pseudo-cube having a square cross section as a whole and are satisfactorily accommodated in a rectangular cylindrical protective case 22.
On the other hand, since the openings 23 are formed in a lattice shape on the top surface 22a, even if the periphery is closed, the warm air whose temperature has risen by the heat radiating plate 10 can escape upward, and the hot air accumulates inside. It will not be done. In addition, 24 shown in FIG. 10 is an insertion piece inserted between the heat sinks 10 to fix the protective case 22, and is formed on the back portion of the top surface 22a.

  FIG. 11 is a block explanatory diagram showing an example of connection of the entire distribution board shown in FIG. 2, and a distribution device having a function of outputting current information measured by individual current sensors to which a photovoltaic power generation facility is connected. The board is composed. Extended measurement unit 25 for measuring the generated power of the solar panel SP, primary feed switch 26 for supplying a photovoltaic power generation current from the solar panel SP, current sensors 27 and 28, measured individual branch current data, consumption A communication measurement unit 29 that outputs power data and the like to the outside is assembled.

Thus, since the heat sinks 8 and 9 are provided at the end of the connection side 13 which is the branch breaker connection region formed in a straight line of the copper bar 10, the arrangement relationship between the main breaker 4 and the branch breaker 5 is affected. A heat dissipation structure can be constructed without giving. And since the heat sinks 8 and 9 can be provided using the installation space of one or several branch breakers 5, a big design change is not required from the conventional distribution board. Furthermore, by providing it on the main breaker 4 side, a heat radiating portion can be provided at a portion where current is most concentrated, and heat can be effectively radiated.
Further, since the heat sinks 8 and 9 are bent within a certain width, a large heat dissipation area can be secured in a minimum space, and only the two voltage phase copper bars 10a and 10b are provided with heat sinks. A heat radiating plate can be formed using the region of the copper bar 10c, and a large heat radiating space can be provided. And since the neutral phase copper bar 10c is arrange | positioned in the forefront part, even if there is no heat sink, it can thermally radiate effectively.
Furthermore, since the heat sinks 8 and 9 are housed in a protective case 22 made of an insulator, they can be operated with peace of mind without being touched during a breaker operation or the like.

  In the above embodiment, the heat sinks 8 and 9 are formed for the voltage phase copper bars 10a and 10b. However, a heat sink may be provided for the neutral phase copper bar 10c. Moreover, the method of bending the heat sinks 8 and 9 is not limited to the above-described form, and the heat sinks 8 and 9 may be bent in any way as long as they can be stacked so as not to come into contact with each other. And heat dissipation efficiency rises by bending and enlarging a surface area.

  1 .... distribution panel, 3..panel, 4. main breaker, 5 .... branch breaker, 8 .... first heat sink (heat sink), 9 .... second heat sink (heat sink), 10.・ Copper bar, 22 ・ ・ Protective case (insulation frame), 23 ・ Opening.

Claims (2)

In a distribution board in which a main breaker and a plurality of branch breakers arranged in a row are connected via a strip-shaped copper bar,
The copper bar is composed of two voltage phase copper bars and one neutral phase copper bar, and the neutral phase copper bar is disposed in the foremost portion, and the three copper bars are arranged in the thickness direction of the copper bar. It is made up of overlapping bars,
A heat sink is extended from the copper bar to the end portion of the main branch breaker side of the branch breaker connection region in which at least two of the voltage bars of the three copper bars are linearly formed, and the row of the branch breakers the heat radiating plate is disposed adjacent to,
The distribution board , wherein the heat radiating plate is bent in an L shape or a U shape in a copper bar arrangement direction orthogonal to the extending direction . The heat sink, distribution board according to claim 1, characterized by comprising housed within the insulating frame for insulating the surroundings.

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