JP2004166385A - Distribution board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a distribution board in which, while keeping the dimensions of a box body the same as before even if thick electric wires are connected by using a master breaker with a larger capacitance, a compact distribution board can be composed, and moreover, electric wire connecting work can be easily performed. <P>SOLUTION: The distribution board is so composed that a plurality of branch breakers are connected to the master breaker and the load side of the master breaker, and, it includes a box body to cover the master breaker and a plurality of the branch breakers. While terminals on the load side of the master breaker have terminals to connect the electric wires and bars in the direction from the load side to the power supply side of the master breaker, terminals on the power supply side are made to have terminals to connect the electric wires to the direction of connecting the power supply side and the load side from the approximately perpendicular direction. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in connection of electric wires to a breaker provided in a distribution board, and more particularly to connection of an electric wire to a main breaker even in a small distribution board housing. This is to ensure sufficient space.
[0002]
2. Description of the Related Art An example of a conventional distribution board will be described with reference to FIG. In FIG. 4 of Patent Document 1, reference numeral 22 denotes a distribution board housing, 23 denotes a main breaker, 24 denotes a plurality of branch breakers, and 25 denotes a connection conductor between the main breaker 23 and the branch breaker 24. The connection of electric wires to each breaker in the conventional distribution board is performed as shown by an arrow in FIG. 4, and particularly, the connection of electric wires to the terminal 27 of the main breaker 23 is performed by connecting the load from the (power supply side) terminal 27 of the main breaker 23. In order to connect in the direction toward the side terminal (connection conductor 25) (downward in the figure), in this case, a space for drawing a wire once into the housing 22 and then performing a bending process or the like (generally referred to as a gutter space) ) 26a was required above the main breaker, and the vertical dimension of the housing was also determined according to the required dimensions of the main breaker and the gutter space.
[0003]
[Patent Document 1]
JP-A-2001-95113 (FIG. 4)
[0004]
However, in recent years, the amount of electricity used in houses and the like has been increasing, and therefore, the rated current of the breaker installed in the main trunk unit is required to be larger than that of the conventional circuit breaker, and the connecting wires are also required. Thick ones are used.
[0005] When the connecting wire becomes thicker, the above-mentioned gutter space for the bending process of the wire becomes larger, and the housing of the distribution board must be enlarged in accordance with the increase in the size of the main breaker. There is a limit in terms of the installation space of the switchboard, and it is not preferable to make the housing size larger than before.
For example, a main breaker having a rating of 100 A generally has a vertical dimension shown in FIG. 4 of the aforementioned Patent Document 1 of about 100 mm, and a required gutter space is 80 to 100 mm in a JISC8328 residential distribution board. It was sufficient that the vertical dimension (vertical direction in FIG. 1) of the distribution board housing was about 300 mm. However, when the main breaker is 150A, the vertical size of the breaker is about 150 mm, and the required gutter space is also 150 mm.
According to the present invention, even when a thick electric wire is connected by using a breaker having a large capacity as described above, the size of the housing is the same as that of the conventional case, and a compact distribution board can be constructed. The purpose is to provide a distribution board that can be easily operated.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention according to claim 1 is directed to a distribution board including a main breaker and a plurality of branch breakers connected to a load side of the main breaker, and a casing covering the main breaker and the plurality of branch breakers. The load-side terminal of the main breaker has terminals for connecting wires and bars in the direction from the load side of the main breaker to the power supply side. A power distribution board characterized by having a terminal for connecting the power distribution panel.
According to a second aspect of the present invention, there is provided the distribution board according to the first aspect, wherein the main breaker comprises a main breaker main body and a terminal device connected to a power supply side terminal of the main body.
[0010]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram for explaining a distribution board using the first embodiment of the present invention. In the housing 1, a main breaker 2, a plurality of branch breakers 3, a connecting conductor device 4 for the main breaker 2 and the plurality of branch breakers, and the like are housed. Reference numerals 51 to 53 denote relay terminal plates connected to the power connection terminals 21 to 23 of the main breaker 2, respectively. As shown in FIG. 2, one of the relay terminal plates 51 to 53 has connection portions 511 to 531 to the wire connection side terminals of the main breaker, and the other has wire connection terminal portions 512 to 532. 51 to 53 have different lengths, and when connected and fixed to the wire side connection terminals 21 to 23 of the breaker with terminal screws 211 to 231, the wire connection terminal portions 512 to 532 are displaced in the power load direction of the main breaker. It is arranged to be. The electric wires 71 to 73 are connected to the electric wire connection terminal portions 512 to 532 from the right side in the drawing. Reference numeral 8 denotes an insulating plate on the near side of the relay terminal plates 51 to 53.
The terminals 24 to 25 on the load side of the main breaker 2 are connected to the connection conductor 4 in the direction from the load side to the power supply side of the main breaker, as in the example shown in FIG. The connection can be made, and the conventional structure can be used as it is. (The connecting conductor device 4 is the same as the conventional example.)
FIG. 3 shows a second embodiment of the present invention. In the second embodiment, an insulated relay terminal block 9 is provided instead of the relay terminal plates 51 to 53 shown in the first embodiment. As shown in FIG. 4, the relay terminal block 9 includes relay conductors 91 to 93 and an insulating base 94 for holding the relay conductors. The relay conductors 91 to 93 are fixed to the insulating base 94 with screws 912 to 932. From the insulating base portion 94, connecting pieces 911 # 931 of the relay conductor to the power connection side terminals 21 to 23 of the main breaker 2 extend, and the terminal screws 211 to 231 of the main breaker are used similarly to the example of FIG. It is screwed to the power supply connection terminals 21 to 23. The other ends of the relay conductors 91 to 93 are electric wire connection parts 913 to 933, and are arranged so as to be sequentially distant from the power supply connection terminals 21 to 23 of the main breaker 2. The connection of the electric wires is the same as the example shown in FIG.
FIG. 5 is a diagram showing a third embodiment of the present invention. In the embodiment of FIG. 5, the power supply connection terminals 101 to 103 of the main breaker 10 are provided integrally with the main breaker, and the power supply connection terminals are arranged in the direction connecting the power supply side and the load side (vertical direction in the figure). They are arranged so as to be displaced from each other and open in a direction perpendicular to the direction connecting the power supply side and the load side. The connection of the electric wires is the same as the example shown in FIG.
In the above description, since all the electric wires are connected to the electric wire connection terminals from the right side of the figure, the gutter space above the main breaker has only three terminals to which electric wires of a required thickness can be connected. All you need is space. For example, when the rated current of the main breaker is 150 A, even in the case of FIG. 3, a space having the same vertical dimension as the width of the breaker only needs to be above the main breaker body in the figure, and in reality, it may be about 90 mm. Therefore, even if the length of the main breaker is set to 150 mm, even if the length of the housing of the distribution board is about 300 mm, it is possible to provide a distribution board rated at 150 A that can secure a sufficient space for connecting electric wires. Also, the description has been given of an example in which the main breaker has three poles, but it is obvious that two poles (that is, two wires) may be used.
[0015]
[Effect] As described above, even when a thick wire is connected using a breaker having a large capacity, the housing dimensions are the same as the conventional case, a compact power distribution panel can be configured, and the connection work of the wires can be easily performed. Electric board can be provided.
[Brief description of the drawings]
FIG. 1 is a diagram of a first embodiment of the present invention.
FIG. 2 is a diagram of a relay terminal plate.
FIG. 3 is a diagram of a second embodiment of the present invention.
FIG. 4 is a diagram of a relay terminal block.
FIG. 5 is a diagram of a third embodiment of the present invention.
[Explanation of symbols]
1, casing 2, main breaker 3, branch breaker 4, connecting conductor devices 51, 52, 53, relay terminal plate 9, relay terminal block 10, main breaker

Claims (2)

A plurality of branch breakers are connected to the main breaker and the load side of the main breaker, and in a distribution board including a housing covering the main breaker and the plurality of branch breakers, a load terminal of the main breaker is connected from a load side of the main breaker. A power distribution panel having terminals for connecting wires and bars in a direction toward the power supply side, wherein the power supply side terminals have terminals for connecting wires from a direction substantially perpendicular to a direction connecting the power supply side and the load side. . The distribution board according to claim 1, wherein the main breaker comprises a main breaker main body and a terminal device connected to a power supply side terminal of the main main body.

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