JP6849219B2 - Distribution board - Google Patents

Description

The present invention relates to a distribution board in which a large number of branch switches can be arranged inside.

The conventional 3-wire distribution board is a three-phase bus that is connected to the main switch connected to an external power supply and is connected to the secondary side of the main switch and extends parallel to the distribution board in the vertical direction. It consists of bars R, S, T and branch switches that are placed facing each other across the bus bars R, S, T, and they are stored in a cabinet and placed in an appropriate installation location such as a tenant or building. Has been done.

Patent Document 1 relates to a main bar connection structure of a distribution board, and constitutes a main breaker connection portion 9 in which one end of the main bars 4, 5 and 6 is connected to a secondary terminal 8 of the main breaker 2. Of the main bars of the book, the outer ones of R phase 4 and T phase 6 are bent horizontally with respect to the wide surface of the strip-shaped copper bar to extend the branch bar connection part 10, and further, the main breaker connection part. By forming 9 and the branch bar connecting portion 10 integrally, the width of the charging portion is narrowed, the secondary side space of the branch breaker can be widened, and the wiring work becomes easy (paragraphs 0008,0009, Paragraph 0008,0009, 0012) is described.

Further, Patent Document 2 relates to a distribution board, which includes a plurality of conductive bars connected to external electric wires, and screw insertion holes for screwing branch conductors connected to the conductive bars along the longitudinal direction. It is provided at equal intervals. In addition, by configuring multiple types of circuit breakers with different width dimensions to be mounted at regular mounting intervals, screws are inserted into the conductive bar according to the width dimensions of the main switch used as in the past. It is described that the work of providing holes is not required, and the manufacturing process of the distribution board can be simplified (paragraphs 0010, 0040, 0045).

Further, Patent Document 3 relates to a distribution board, which is a large number of two-contact breakers in which two contacts are built in a case of a one-contact breaker size, and a connection hole is provided on the center line of the main line bar and the neutral bar. The connection hole is provided on the center line of the width of the two-contact breaker, and the two-contact breaker can be used by using the same trunk bar or neutral bar as that used for the one-contact breaker (paragraph 0006). , 0007, 0011) are described.

JP-A-2002-233010 Japanese Unexamined Patent Publication No. 2015-119591 Japanese Unexamined Patent Publication No. 08-088912

In recent years, as the number of electric devices used has increased and devices with high power consumption have begun to appear on the market, a large number of branch switches have become necessary. However, in the conventional arrangement method of arranging the branch switches vertically (Patent Documents 1, 2, 3 and FIG. 11), the number of branch switches that can be stored in the cabinet is limited, and the required number is required. It is very difficult to install a branch switch in one cabinet, and when actually adding a branch switch, it is necessary to install multiple cabinets or increase the size of the cabinet itself. It ends up.
Since the distribution board is a device that distributes the power sent from the power system (external power supply) to the electric equipment via the branch switch, a plurality of wires are connected to the branch switch. For example, a branch copper band for connecting to a bus conductor provided on the primary side of a branch switch, electrical wiring connected to the building side and equipment side connected to the secondary side of the branch switch, etc., but in the cabinet. In order to arrange a large number of branch switches, it is very important to consider the position and space of wiring such as branch copper strips and connecting wires, and the connection state with the bus conductor.

The applicant of the present application has diligently examined the optimum arrangement configuration of the electric parts used in the distribution board in the cabinet, and as a result, the electric parts such as the bus conductor, the branch switch, and the branch copper band which have been conventionally arranged on the plane. The space inside the cabinet can be effectively utilized by arranging the branches using the space of the depth, and the branch switches are arranged in a horizontal row, and the branch switches arranged in a horizontal row are arranged vertically. It was found that by arranging them, a large number of branch switches can be stored in the cabinet, and the number of branch switches can be flexibly changed even if the size of the cabinet changes.

Therefore, in the present invention, the branch switches are arranged in a horizontal row except for the wiring portion of the bus conductor, and the rows of the branch switches arranged in a horizontal row are arranged at predetermined intervals in the vertical direction. It is an object of the present invention to provide a distribution board in which a large number of branch switches can be stored in a cabinet.

The distribution board of the present invention is a distribution board provided with a main switch, a bus conductor connected to the secondary side of the main switch, a plurality of branch switches, and a cabinet for accommodating these. It is composed of a long socket base provided by extending a plurality of branched copper strips in the longitudinal direction, and a power supply block which is a member for transmitting power from the bus conductor to the plurality of branched copper strips. A branch unit is provided, and a plurality of grooves are provided in the longitudinal direction of the elongated socket base for inserting the terminals of the branch switch and / or the power supply block and connecting to the branch copper strip. The branch switch is attached / detached at any position in the longitudinal direction of the groove. The present invention relates to a distribution board including a main switch, a bus conductor connected to the secondary side of the main switch, a plurality of branch switches, and a cabinet for accommodating these. A plurality of vessels are arranged horizontally to the cabinet with the wiring portion of the bus conductor interposed therebetween.
Further, the distribution board of the present invention is characterized in that a plurality of rows of the branch switches arranged horizontally and horizontally are arranged at predetermined intervals in the direction perpendicular to the cabinet.
Here, the "horizontal direction" is the horizontal direction (LR) of the paper surface with respect to the cabinet.
Further, the "vertical direction" is a direction orthogonal to the horizontal direction, and is a paper surface vertical direction (UD) with respect to the cabinet.
The "wiring location of the bus conductor" is a location where the bus conductor and the branched copper band are connected, and in the embodiment, a location where a power supply block is provided.
According to the present invention, the branch switches are arranged in a horizontal row except for the wiring portion of the bus conductor, and the rows of the branch switches arranged in a horizontal row are arranged vertically at predetermined intervals. As a result, a large number of branch switches can be stored in the cabinet as compared with the conventional arrangement method. This is due to the devised arrangement of the branch copper band, which is the main wiring connected to the branch switch, and the electrical wiring that connects to the building side and equipment side, and the branch copper band is branched and opened in the depth direction of the cabinet. By stacking and arranging the switch with the vessel, the space on the plane of the cabinet can be widely used, and the branch switch can be arranged in the space where the branch copper band is conventionally arranged.

The distribution board of the present invention is characterized in that electrical wiring connected to the building side and the equipment side connected to the secondary side of the branch switch is arranged between the rows of the branch switch. To do.
According to the present invention, by arranging the rows of branch switches at predetermined intervals, it is possible to efficiently arrange the electrical wiring connected to the building side or the like between the rows of the branch switches. Since one electrical wiring connected to the building side and the equipment side is connected to each branch switch, the number of electrical wiring increases as the number of branch switches increases, and it becomes very difficult to arrange them in the cabinet. However, the electrical wiring of the branch switch on the left side in the horizontal direction across the wiring part of the bus conductor is wired from between the rows of the branch switch to the left end of the cabinet through the left side, and the electricity of the branch switch on the right side in the horizontal direction. By wiring from between the rows of branch switches to the right end of the cabinet through the right side, the wiring route can be simplified and the wiring length can be shortened. Further, it is possible to wire in the space behind the branch unit, and in this case as well, the wiring path can be simplified.

The distribution board of the present invention is characterized in that the bus conductor is formed of a flexible conductor.
According to the present invention, since the bus conductor is formed of a conductor having flexibility such as expansion and contraction, the usage method and usage mode of the distribution board, the number of electric devices used, and the power consumption Even if the wiring path of the bus conductor changes depending on the amount, it is possible to flexibly deal with it.

The distribution board of the present invention is characterized in that four branch switches are arranged on one side and six on the other side in the horizontal direction with respect to the cabinet with the wiring portion of the bus conductor interposed therebetween. ..
Further, the distribution board of the present invention is characterized in that two branch switches are arranged on one side and eight on the other side in the horizontal direction with respect to the cabinet with the wiring portion of the bus conductor interposed therebetween. To do.
Regarding the arrangement of the branch switch, the main switch is located at the center of the upper part of the cabinet, and the three-wire bus conductor is arranged vertically from the secondary side of the main switch, so that it is located below the main switch. It is preferable that there is a wiring portion of the bus conductor in consideration of the wiring path of the bus conductor. Therefore, it is preferable to arrange two or four branch switches on one side in the horizontal direction with respect to the cabinet and six or eight on the other side with the wiring portion of the bus conductor interposed therebetween. Two or four may be placed on the left side in the horizontal direction and six or eight on the right side in the horizontal direction, or six or eight may be placed on the left side in the horizontal direction and two on the right side in the horizontal direction. It may be arranged in pieces or eight pieces.

In the present invention, the distribution board further includes a branch unit having a branch copper band inside, and the branch unit and the branch switch are stacked and arranged in the depth direction of the cabinet to form the bus conductor. The branch switch is connected.
Here, the "depth direction" is the direction from the front surface of the cabinet to the back surface of the cabinet, and is a direction orthogonal to the horizontal direction and the vertical direction.
According to the present invention, by forming a branch unit having a branch copper band inside and laminating the branch unit on the branch switch, the branch copper band conventionally arranged on a plane is placed in the depth direction with the branch switch. It is possible to arrange them in layers, and it is possible to use a wide area on a flat surface in the cabinet.

In the distribution board of the present invention, the branch unit includes a socket base and a power supply block, the socket base is provided with the branch copper band inside, and the power supply block is internally connected to the bus conductor. It is characterized by being.
Further, the distribution board of the present invention is characterized in that the power supply block is provided at a wiring position of the bus conductor between the branch switches.
The distribution board of the present invention is characterized in that the socket base has a groove for inserting a terminal of the branch switch and / or the power supply unit.
The branch unit includes a socket base and a power supply block, and the socket base serves as a base for fixing the branch switch and the power supply block in the cabinet and as a branch copper band. According to the present invention, it is possible to reduce the space in which the substrate and the branch copper strip, which have conventionally fixed the branch switch in the cabinet, are arranged, and it is possible to effectively utilize the space.
Further, according to the present invention, since the socket base has a groove for inserting the terminal of the branch switch and the power supply unit, the power supply block and the branch switch which are the connecting members of the bus conductor and the branch copper band can be easily installed in the cabinet. It can be fixed. Furthermore, by providing multiple grooves in the left-right direction, it is possible to flexibly change the arrangement of the power supply block even if the wiring path of the bus conductor changes, and it is easy to change the number of branch switches used. It is possible to increase or decrease the number of branch switches and change the position.

The distribution board of the present invention is characterized in that the cabinet has a door provided in the opening of the cabinet, and the door is formed in a mesh shape so that the state of the inside can be confirmed from the outside. ..
According to the present invention, since the door is formed in a mesh shape so that the state of the inside can be confirmed from the outside, the state of the switches of the main switch and the branch switch can be easily confirmed even when the door is closed. It becomes possible. The door may be made of a transparent material or may be provided with a plurality of slits.

The distribution board of the present invention is characterized in that the cabinet includes a protective plate for protecting the electrical components of the distribution board, and the protective plate is divided into rows of the branch switch.
According to the present invention, a protective plate that is detachably attached to the inside of the housing is provided, and the protective plate is divided into rows of branch switches and can be individually attached / detached. Only the protective plate of the branch switch required for inspection can be removed, and even if the number of branch switches increases, the work can be performed safely.

According to the present invention, the branch switches can be arranged in a horizontal row by stacking the branch copper strip, the branch switch, and the power supply block, and the arranged rows of the branch switches can be arranged vertically. By arranging them at predetermined intervals in the direction, it is possible to efficiently arrange the electrical wiring connected to the building side and the equipment side, and to arrange a large number of branch switches in the cabinet.
Further, according to the present invention, the branch switch and the power supply block can be easily fixed, and by using a member (socket base) having a branch copper band inside or by using a flexible bus conductor, the inside of the cabinet can be used. It is possible to make effective use of this space, and it is also possible to flexibly respond to changes in the number of branch switches and the wiring route of the bus conductor.

It is a front view which shows the distribution board 10 (the state which the door 11 is opened) of the 1st Embodiment of this invention. It is a front view which shows the distribution board 10 (the state which the door 11 is closed) of the said embodiment. It is a side view which shows the distribution board 10 (the state which the door 11 is closed) of the said embodiment. It is a front schematic diagram which shows the distribution board 10 (the state which the protection plate 12 is removed) of the said embodiment. FIG. 5 is a sectional view taken along the line AA of the distribution board 10 of the above embodiment. It is BB sectional view of the distribution board 10 of the said embodiment. It is a CC sectional view of the distribution board 10 of the said embodiment. It is a front view which shows the other arrangement structure (the state which the door 11 is opened) of the distribution board 10 of the said embodiment. It is a front schematic diagram which shows the other arrangement structure (state which the protection plate 12 is removed) of the distribution board 10 of the said embodiment. It is an enlarged photograph of the bus conductor 4 used for the distribution board 10 of this invention. It is a photograph in the cabinet which shows the arrangement structure of the conventional distribution board 500.

Specific embodiments to which the present invention is applied will be described in detail below with reference to the drawings.

(First Embodiment)
FIG. 1 is a front view showing a distribution board 10 (a state in which the door 11 is opened) according to the first embodiment of the present invention, and FIG. 2 is a front view showing the distribution board 10 (the door 11 is closed) according to the above embodiment. It is a front view which shows the state). FIG. 3 is a side view showing the distribution board 10 (a state in which the door 11 is closed) of the above-described embodiment, and FIG. 4 is a side view showing the distribution board 10 (a state in which the protective plate 12 is removed) of the above-described embodiment. It is a front schematic.
The distribution board 10 of the present invention is a device arranged in a tenant, a building, or the like and distributes the electric power sent from the electric power system (external power source) to the electric equipment via the branch switch 3, and includes the cabinet 1 and the main. A switch 2, a plurality of branch switches 3, 3 ... (breakers), a three-phase bus conductor 4 (4R, 4S, 4T) connected to the secondary side of the main switch 2, and a bus conductor. A branch unit 5 (not shown) for connecting 4 and the branch switch 3 is provided.

The cabinet 1 is an outer frame for storing the electrical components of the distribution board 10, and has a rectangular housing 13 having an opening on the front surface and a door provided in the opening for opening and closing the cabinet 1. 11 and a protective plate 12 provided inside the door 11 for protecting the electrical components of the distribution board 10.
The door 11 is a plate-shaped member that can be opened and closed so as to cover the front surface of the housing 13, and is formed in a mesh shape so that the state of the electric parts inside can be confirmed from the outside. In the present embodiment, the door 11 is formed in a mesh shape, but it is sufficient if the states of the switches 21 and 31 of the main switch 2 and the branch switch 3 can be confirmed even when the door 11 is closed, and the door 11 is transparent. It may be made of a certain material or may be provided with a plurality of slits.
The protective plate 12 is the inner lid of the cabinet 1, is divided into a plurality of parts, and is detachably attached to the inside of the housing 13. The protective plate 12 has a through hole for operating the switches 21 and 31 of the main switch 2 and the branch switch 3 (FIG. 6). In the present embodiment, the protective plate 12 is divided into rows of the branch switch 3, and each can be individually attached and detached. The protective plate 12 may not be provided.

The main switch 2 is a molded case circuit breaker that collectively cuts off the electric power from the power system (external power supply), and is arranged at the upper center position in the cabinet 1. The primary side of the main switch 2 is connected to the power system (external power supply), and the secondary side is connected to the three bus conductors 4 (4R, 4S, 4T).

FIG. 10 is an enlarged photograph of the bus conductor 4 used in the distribution board 10 of the present invention.
The bus conductors 4 are three conductors 4R, 4S, and 4T extending downward from the secondary side of the main switch 2, and the cabinet 1 is arranged substantially parallel to the main switch 2 at intervals in the vertical direction. One end is attached to the secondary side of the main switch 2 and the other end is attached to the power supply block 52 of the branch unit 5 (not shown). The bus conductor 4 is formed of a conductor having flexibility such as bending and stretching to connect the main switch 2 and the branch unit 5 (not shown) (FIG. 10). It is possible to use various materials such as a copper band in which high-purity electrolytic copper is coated with an insulating material, an electric wire, and a connecting conductor using a round stranded wire.

The branch switch (breaker) 3 is a switch that is branched and connected from the bus conductor 4, has a switch 31 that cuts off an electric circuit on the front, and is electrically connected to a branch unit 5 (not shown) on the back. The primary side terminals 32, 32, ... In addition, the upper part is provided with electrical wiring on the secondary side that connects to the building side and the equipment side.
In the branch switch 3, 10 branch switches 3 are arranged in the horizontal direction LR (horizontal direction) to form branch switch rows 3a, 3b, ..., 3f, and branch switch rows 3a, 3b, ... By arranging 6 rows of 3f in the vertical direction UD, a total of 60 branch switches 3 are provided in the cabinet 1.

FIG. 5 is a cross-sectional view taken along the line AA of the distribution board 10 of the above embodiment, and FIG. 6 is a cross-sectional view taken along the line BB of the distribution board 10 of the above embodiment. FIG. 7 is a cross-sectional view taken along the line CC of the distribution board 10 of the above embodiment.
The branch unit 5 (not shown) is a member that connects the bus conductor 4 and the branch switch 3 using a minimum area on a plane, and has a socket base 51 and a power supply block 52.

The socket base 51 is a long base for fixing the branch switch 3 in the cabinet 1, and the primary side terminals 32, 32 ... Of the branch switch 3 and the secondary of the power supply block 52 are on the front surface. A plurality of grooves 511, 511 ... For inserting the side terminals 521, 521, ... (Not shown) are provided, and a plurality of branched copper strips 521, extending in the longitudinal direction of the socket base 51 are provided inside. 512 ... Is provided.
One socket base 51a, 51b, ..., 51f is used for each branch switch row 3a, 3b, ..., 3f, and the socket base 51 is arranged so as to be substantially parallel to the floor in the longitudinal direction. They are housed in the cabinet 1 in a state of being arranged in six rows in the vertical direction UD at predetermined intervals.
When the primary side terminal 32 of the branch switch 3 is inserted into the groove 511 of the socket base 51, the primary side terminal 32 of the branch switch 3 and the branch copper band 512 of the socket base are formed so as to electrically communicate with each other. .. In the present embodiment, three branch copper strips 512 are provided in the socket base, and a plurality of branch switches 3 are connected to one branch copper strip 512.

The power supply block 52 is a member for transmitting the electric power from the bus conductor 4 to the branched copper strips 512, 512 ... Of the socket base 51, and one power supply is provided for each of the socket bases 51a, 51b, ..., 51f. Blocks 52a, 52b, ..., 52f are provided. Secondary terminals 521, 521 ... (not shown) are provided on the back surface of the power supply block 52, and are attached to the front surface of the socket base 51 in the same manner as the branch switch 3.
One end of the bus conductors 4R, 4S, 4T extending from the secondary side of the main switch 2 is inserted into the inside from the upper part of the power supply block 52 and connected by screwing or the like, and the bus conductors 4R, 4S, 4T and the secondary side terminal are connected. 521, 521 ... (Not shown) are electrically connected. Further, in order to transmit the power of the bus conductors 4R, 4S, 4T from the power supply block 52 arranged at the upper part to the power supply block 52 arranged at the lower part, the bus conductors 4R, 4S, 4T are connected inside the power supply block 52. It extends downward from the inside of the power supply block 52.
When the secondary side terminal 521 (not shown) of the power supply block 52 is inserted into the groove 511 of the socket base 51, the secondary side terminal 521 (not shown) of the power supply block 52 and the branched copper band 512 of the socket base are electrically connected. It is formed to communicate.

(Arrangement configuration)
Regarding the arrangement configuration of the electrical parts of the distribution board 10, the main switch 2 is arranged at the upper center position in the cabinet 1, and the bus conductors 4R, 4S, 4T are extended downward from the lower part of the main switch 2. Deploy. The socket bases 51a, 51b, ..., 51f are arranged below the main switch 2 in the cabinet 1 so that the longitudinal direction is substantially parallel to the floor, and are arranged vertically at predetermined intervals. The branch switches 3 are arranged in a horizontal row on the front surface of the socket base 51, and the power supply block 52 is attached. The electrical wiring on the secondary side connected to the building side and the equipment side provided on the upper part of the branch switch 3 is wired between the socket base 51 and the socket base 51.
Although the branch switch 3 and the power supply block 52 are arranged on the socket base 51, since it is necessary to connect the bus conductors 4R, 4S, 4T inside the power supply block 52, the wiring of the bus conductors 4R, 4S, 4T It is preferable to attach the power supply block 52 around the lower part of the main switch 3 in consideration of the route. In the present embodiment, four branch switches 3 are provided on the left side of the paper surface and six branch switches 3 are provided on the right side of the paper surface with the power supply block 52 interposed therebetween.
Further, the power supply block 5 is preferably arranged between the branch switch 3 and the branch switch 3. Specifically, when the power supply block 5 is arranged at the end of the socket base 51, since a plurality of branch switches 3 are connected to one branch copper band 512, the power supply socket 5 (bus conductor) A large amount of current may flow in one direction from the connection point between 4 and the branch copper strip 512) to the plurality of branch switches 3, and the socket base 51 itself may generate heat. In such a case, it is necessary to take measures such as limiting the number of branch switches 3 that can be arranged. Therefore, by arranging the power supply socket 5 between the branch switch 3 and the branch switch 3, the current from the bus conductor 4 can be dispersed and flowed in two directions, so that more branch switches can be used. It is possible to arrange 3 or to arrange a branch switch 3 having a high current value.

By incorporating the branch copper strip 512, which has been conventionally arranged on a flat surface, into the base of the branch switch 3, it is possible to unitize the branch copper strip 512 and the branch switch 3 in a stacked manner. The flat area in the cabinet 1 in which the branch copper strip 512 is conventionally arranged becomes available, and a large number of branch switches 3 can be housed in the cabinet 1.
Further, a long socket base 51 is arranged parallel to the floor in the cabinet 1, and branch switches 3, 3 ... Are arranged in a horizontal row (in a row in the horizontal direction LR) on the front surface of the socket base 51. By arranging the branch switch rows 3a, 3b, ..., 3f side by side in the vertical direction, a large number of branch switches 3 can be housed in the cabinet 1 as compared with the conventional arrangement method.
Further, according to the distribution board arrangement method of the present invention, even if cabinets 1 of different sizes are used, the number of branch switches 3 can be flexibly changed and stored in the cabinet 1. Specifically, when a cabinet 1 having a wide width (large in size in the horizontal direction LR) is used, the branch switch 3 is arranged in the horizontal direction LR by forming the socket base 51 long in the horizontal direction LR. , 3 ... Can be arranged in an increased number, and when the cabinet 1 having a high height (large size in the vertical direction UD) is used, the branch switch rows 3a, 3b, which are arranged. By increasing the number, it is possible to easily increase the number of branch switches 3.

FIG. 8 is a front view showing another arrangement configuration of the distribution board 10 of the above embodiment (a state in which the door 11 is opened), and FIG. 9 is a front view showing another arrangement configuration of the distribution board 10 of the above embodiment (a state in which the door 11 is opened). It is a front schematic view which shows the state (the state which the protective plate 12 is removed).
The arrangement of the branch switch 3 and the power supply block 52 on the socket base 51 can be changed as appropriate depending on how the distribution board is used. For example, two branch switches 3 may be provided on the left side of the paper surface and eight branch switches 3 may be provided on the right side of the paper surface with the power supply block 52 interposed therebetween. Further, the number of branch switches 3 used in the branch switch rows 3a, 3b ..., 3f may be 10 or more or less than 10, and the branch switch rows 3a, 3b ..., 3f. The number of columns may be 6 or more, or less than 6. The number of branch switches 3 and the number of rows of branch switches 3a, 3b ..., 3f can be appropriately selected depending on the number of electric devices used and the amount of power consumption.

10 distribution board,
1 cabinet,
11 doors,
12 Protective plate,
13 housing,
2 Main switch,
21 Main switch,
3 branch switch,
3a, 3b, 3c, 3d, 3e, 3f branch switch train,
31 Branch switch switch,
32 Primary side terminal of the branch switch,
4,4R, 4S, 4T bus conductor,
5 branch unit,
51, 51a, 51b, 51c, 51d, 51e, 51f socket base,
511 grooves,
512 branched copper strips 52, 52a, 52b, 52c, 52d, 52e, 52f power supply block,
521 Secondary terminal of power supply block,
500 conventional distribution board,
LR horizontal,
UD vertical

Claims (6)

In a distribution board equipped with a main switch, a bus conductor connected to the secondary side of the main switch, a plurality of branch switches, and a cabinet for accommodating these , a plurality of branch copper bands are lengthened inside. The long socket base is provided by extending in the direction, and the long socket base is provided with a branch unit composed of a power supply block which is a member for transmitting power from the bus conductor to the plurality of branch copper bands. The shaped socket base is provided with a plurality of grooves in the longitudinal direction for inserting the terminals of the branch switch and / or the power supply block and connecting to the branch copper strip, and any of the plurality of grooves in the longitudinal direction. A distribution board characterized in that the branch switch is attached / detached at that position. The distribution board according to claim 1, wherein the power supply block is attached to and detached from a terminal of the power supply block and a plurality of grooves provided in the elongated socket base. The long socket base, which is provided with a bus conductor and the branch unit inside the distribution board and constitutes the branch unit, has a primary side terminal of the branch switch and a secondary of the power supply block on the front surface thereof. A plurality of grooves for inserting side terminals are provided, a secondary side terminal is provided on the back surface of the power supply block, and a primary side terminal is provided on the back surface of the branch switch, and the front surface of the elongated socket base is provided. The distribution board according to claim 1 or 2, wherein the distribution board is attached to the groove of the above. The branch switch has a configuration in which a plurality of branch switches are arranged horizontally and horizontally with respect to the cabinet with a power supply block, which is a wiring location of the bus conductor, interposed therebetween. The distribution board according to any one of claims 1 to 3, which is characterized. The branch unit is characterized in that the bus conductor and the branch switch are connected via the branch unit by arranging the branch unit and the branch switch in a laminated manner in the depth direction of the cabinet. The distribution board according to any one of claims 1 to 4. Between the rows of the branch switches, electrical wirings connected to the building side and the equipment side connected to the secondary side of the branch switches are arranged , and wiring points of the bus conductor and the branch unit. The distribution board according to claim 4 or 5, wherein the power supply block is provided at the same position in the horizontal direction of the plurality of branch units.

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