JPH09271113A - Constitution of bus bar for 75-100a distribution board for residence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a copper bus bar which is simple of assembly and is generally inexpensive by screwing a plurality of sub bus bars, which have three to four branching and connecting feet and through holes for screws at sub copper bus bar parts, to a main bus bar. SOLUTION: Sub-bus bar blocks 7 and 7' have a plurality of branching and connecting feet 702 and 702 to be connected to the terminals of branch breakers, and through holes 703 and 703' at sub copper bus bar parts 701 and 701', and with a rated current as 60A, one sub copper bus bar part is provided with three to four branching and connecting feet. Moreover, though the sub bus bar blocks 7 and 7' are fixed continuously into the screw holes 801 and 801' of the main bus bar 8, by screws 9 and 9', the capacity of current application is made 60A-100A. Then, for the copper bus bar, a power cable 10 is fastened into the screw hole 801 together with its screw through hole 703 so as to supply power, and the branching and connecting feet 702 and 702' are connected to the terminals of breakers, and the power is branched separately for each circuit of each branching breaker. As a result, as a whole, it can be made inexpensive by improving the yield of the material, and also the assembly can be simplified.

Description

Detailed Description of the Invention

[0001]

[Industrial field of application] The invention of the present invention relates to a residential distribution board.
It is related to the structure of the copper bus bar of the distribution board for 5-100A rated houses.

[0002]

2. Description of the Related Art Conventionally, a copper bus bar conventionally used for a 75 to 100 A rated distribution board of this type is t2 mm as shown in FIG.
~ T3mm copper plate punched by press, or
As described above, the branch bar 5 for connecting a plurality of branch breaker terminals is fixed to the bus bar 4 having a cross-sectional area required for energization with screws or tacks 6 for each branch circuit.

[0003]

However, such a structure has the following inconveniences.

First of all, according to the method shown in FIG. 4, a plurality of branch bar portions 2 extend orthogonally to the bus bar portion 1, and a plate thickness of t2 mm to t3 mm is obtained not only in the bus bar portion 1 but also in the branch bar portion. The parts 2 and the parts 3 to be used as waste materials are required, and the so-called material yield is poor and the cost is high. In addition, since it is necessary to prepare bus bars of various sizes with different number of branch bar parts depending on the number of branch circuits, many types of molds for press molding are required, and the economical efficiency is poor. . Further, according to the method shown in FIG. 3, the bus bar 4 has a rectangular strip shape and has no portion to be discarded in processing, and the branch bar 5 has a current carrying capacity of t1 mm to t1.5 m.
Since it is a relatively thin material of m and can be processed with good yield, the material cost can be low, and it is economical because one type of die is for branch bars and a simple die for punching a strip conductor is sufficient. There were many processing points for screw tightening and tacking, and the assembly cost was expensive, making it overall expensive.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a copper bus bar for 75 to 100 A, which can be manufactured at low material cost, is easy to assemble, and is inexpensive as a whole.

[0006]

[Means and Actions for Achieving the Object] In order to achieve the above-mentioned object, in the present invention, 3 to 4 branch connecting legs are integrally formed on a sub-copper bus bar portion having a current carrying capacity of 60 A, The sub-copper bus bar portion has a plurality of sub-bus bar blocks having screw through holes, which has a current carrying capacity of 60 to 100 A and is screwed at appropriate intervals to a main bus bar having a plurality of screw holes. is there.

As a result, since the sub busbar block has a current carrying capacity of 60 A, the plate thickness of the copper material can be set to about t1.5, and the sub copper bus bar portion and the branch connection foot portion are integrally formed. The material cost is not so heavy even if it is molded. Further, since the main bus bar may be a rectangular strip conductor, there is no portion to be discarded for processing, and the yield is good. Assembly is simple, as the sub busbar block can be screwed to the main bus bar at several places. Further, the mold can be as simple as one or two types for the sub busbar block and the band-shaped conductor for the main bus bar.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings.

FIG. 1 shows an embodiment of the present invention.

In FIG. 1, reference numerals 7 and 7'indicate sub bus bar blocks, and sub copper bus bar portions 701 and 701 ', respectively.
It also has a plurality of branch connection legs 702, 702 'that are connected to the terminals of the branch breaker and have screw through holes 703, 703'. If the current carrying capacity of the sub-copper busbar is adjusted to the rated current of a general residential distribution board, it may be convenient in some cases to configure the distribution board busbar with only the sub-busbar block. Rated current 30A or 60A
However, the rated current of the branch breaker used for the residential distribution board is 20 A, and the actual current is 1
Since it is generally calculated as about 5 A, if the rated current of the sub busbar block is set to 30 A, only one branch connection foot can be provided for one sub copper busbar and the assembly work of the present invention can be performed. The rated current is set to 60 A, and 3 to 4 branch connection legs are provided for each sub-copper bus bar because the effect on the performance is diminished. The required cross-sectional area of the sub-copper bus bar portion for setting the rated current to 60 A is sufficient if it is 14 to 18 square mm, and if the thickness of the copper plate is 1.5 mm, the width is about 10 mm.

Reference numeral 8 is a main bus bar having a plurality of screw holes 801, 801 ', and the sub bus bar blocks 7, 7'are connected and fixed to the screw holes 801, 801' by screws 9, 9 '. The current carrying capacity of the 8 main busbar is theoretically not required to be more than the current carrying capacity of the 7'sub busbar block if only two sub busbar blocks are connected as shown in FIG. It is sufficient to use a strip-shaped copper body having a width of about 10 mm. When connecting more sub-bus bar blocks after 7'of sub-bus bar blocks, the current carrying capacity of 100 A is 3 mm.
A strip copper body having a width of about 13 mm is required.

Power is supplied to the above copper bus bar by tightening the power supply line 10 with the screw 9 into the screw hole 801 and the screw through hole 703 to supply power, and the plurality of branch connecting legs 702 and 702 'are respectively connected to the branch breaker. Connect to the terminal to branch the power supply for each branch breaker circuit.

FIG. 4 shows a second embodiment of the present invention. Further, in addition to the first embodiment of FIG. 1, screw through holes 704, 704 'are provided in the sub busbar blocks 7, 7', and a main bus bar 8 is provided. Screw holes 802 and 802 'are provided in the
1, 11 'are connected to the 704, 704' parts, and a sub busbar block 7 "is further connected to the main bus bar 8. In this case, the sub bus bar block 7" is connected. The current to be energized can be apportioned to the main bus bar and the sub bus bar block 7'between 801 'and 802' of the main bus bar, and the current to be applied to the sub bus bar blocks 7'and 7 "is 801 of the main bus bar 8. Since the current can be distributed proportionally to the main bus bar and the sub bus bar block 7 between ˜802, if the sub bus bar blocks 7 and 7 ′ and the main bus bar 8 together have a current carrying capacity of 100 A, the total current carrying capacity of 100 A Since a certain bus bar can be configured, the current carrying capacity of the main bus bar 8 is 6
If it is about 0 A, it will be sufficient, and a band-shaped copper body having a thickness of 1.5 mm and a width of about 10 mm can be sufficiently constituted.

[0014]

As described above, according to the present invention, a plurality of sub busbars having three to four branch connection legs and screw through holes are integrally formed on the sub copper busbar portion having a current carrying capacity of 60A. Block, 60-100 with multiple screw holes
Since the main bus bar with the current-carrying capacity of A is connected and fixed with a plurality of screws, compared with the conventional one in which the bus bar portion and the branch connection foot portion are integrally formed from a single copper plate having a thickness of 2 to 3 mm. The part of the sub busbar block can be formed by punching out a copper plate with a thickness of about 1.5 mm, and the material of the branch connection foot part and the waste material can be saved by the thickness, and the main bus bar part can be a strip copper body. If it is used, there will be no part that becomes waste material, the yield of the material as a whole can be improved, and the material cost can be saved. In addition, compared to the conventional one where the branch connection bar for each branch breaker is screwed or tacked to the main bar, the number of screw tightening and tacking points can be reduced to a fraction and the assembly is simplified. . Furthermore, it is said that the mold for molding the parts that make up the busbar can also be a mold for one or two types of sub-busbars, and a simple mold for punching a strip-shaped copper body, which will improve the overall economic efficiency. effective.

[Brief description of drawings]

FIG. 1 is a diagram of a first embodiment of a copper bus bar of the present invention.

FIG. 2 is a diagram of a first conventional example.

FIG. 3 is a diagram of a second conventional example.

FIG. 4 is a diagram of a second embodiment of the copper bus bar of the present invention.

[Explanation of symbols]

 7,7 ', 7 "... Sub busbar block 701, 701', 701" ... Sub copper bus bar part 702, 702 ', 702 "... Screw through hole 8 ... Main bus bar 801, 801' , 802 "・ ・ ・ Screw hole 9,9 ', 9" ・ ・ ・ Screw

Claims (1)

[Claims] 1. A plurality of sub busbars having a current-carrying capacity of 60 A, in which 3 to 4 branch breaker connecting feet are integrally formed in the sub copper bus bar, and screw through holes are provided in the sub copper bus bar. A copper busbar configuration for a 75-100A-rated residential distribution board, characterized in that the block is screwed to a main copper busbar having a plurality of screw holes and having a current-carrying capacity of 60-100A rated at appropriate intervals.