JP3522968B2 - Busbar configuration of 75-100A residential distribution board - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switchboard for residential use.
The present invention relates to a configuration of a copper bus bar of a distribution board for a 5 to 100A rated house. 2. Description of the Related Art Conventionally, a copper bus bar conventionally used for a distribution board rated at 75 to 100 A of this kind is t2 mm as shown in FIG.
Punching and molding a copper plate with a thickness of
The branch bar 5 for connecting a plurality of branch breaker terminals is fixed to a bus bar 4 having a cross-sectional area necessary for energization by screws or studs 6 for each branch circuit. [0003] However, such a configuration has the following disadvantages. First, according to the method shown in FIG. 4, a plurality of branch bar portions 2 extend at right angles to the bus bar portion 1, and the plate thickness of t2 mm to t3 mm is increased not only in the bus bar portion 1 but also in the branch bar portion. It is necessary to use the part 2 and the part 3 which is a waste material, so that the so-called material yield is low and the material is expensive. Furthermore, it was necessary to prepare busbars of various sizes having different numbers of branch bars according to the number of branch circuits, so that many types of press-molding dies were required, resulting in poor economic efficiency. . According to the method shown in FIG. 3, the bus bar 4 has a rectangular band shape and has no portion to be discarded during processing, and the branch bar 5 has a current carrying capacity of t1 mm to t1.5 m.
The material cost can be reduced because it can be formed with a relatively thin material with a high yield, and the yield is low, and the mold is economical because it requires only one type of branch bar and a simple mold that drills a band-shaped conductor. There were many places to be screwed and tacked and the assembly cost was expensive, making the entire system expensive. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a copper bus bar for 75 to 100 A which is inexpensive as a whole, can be manufactured at a low cost and is easy to assemble. In order to achieve the above object, according to the present invention, a current is supplied to a branch breaker.
The bus bar is connected to the branch breaker.
Sub-copper busbar block with continuous foot and main copper
Bus bar, and the sub copper bus bar block
The sub copper bus bar has a current carrying capacity of 60A,
3 or 4 branch breaker connection feet on the copper busbar
Part is integrally formed and has a screw through hole.
Copper busbars have a current carrying capacity of
However, the main copper bus bar corresponds to the screw through hole.
Having a plurality of screw holes,
Layers parallel to the main copper busbar at appropriate intervals.
Screw stop to, and copper bus bar of the electric current the main, support
And the copper busbar block
And a copper bus bar of a 75 to 100 A rated residential distribution board . [0007] Thus, the sub bus bar block is 60
Since the current carrying capacity of A is sufficient, it is possible to reduce the thickness of the copper material to about t1.5. Even if the sub-copper bus bar portion and the branch connection foot portion are integrally formed, the material cost is reduced. No. In addition, the main bus bar may be a rectangular band-shaped conductor, so that there is no part to be discarded in processing, and the yield is good. Assembly is also simple, with only a few screwing of the sub bus bar block to the main bus bar. Further, the mold can be as simple as drilling one or two types for the sub bus bar block and a band-shaped conductor for the main bus bar. 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 'denote sub bus bar blocks, which are sub copper bus bar portions 701 and 701', respectively.
And a plurality of branch connection feet 702, 702 'connected to terminals of the branch breaker. If the current carrying capacity of the sub copper busbar is adjusted to the rated current of a general residential distribution panel, it may be convenient because the subbar busbar block can be used to form the busbar of the distribution panel. Rated current 30A or 60A
However, the rated current of the branch breaker used for the distribution board is 20 A, and the actual current to be supplied is 1
Since it is common to calculate about 5 A, if the rated current of the sub bus bar block is set to 30 A, only two branch connection feet can be provided for one sub copper bus bar, and the assembly work of the present invention is not performed. Therefore, the rated current is set to 60 A, and three to four branch connection feet are provided for one sub copper busbar. The required cross-sectional area of the sub-copper bus bar for setting the rated current to 60 A is sufficient if the required cross-sectional area is 14 to 18 square mm, and the width is about 10 mm when the thickness of the copper plate is 1.5 mm. Reference numeral 8 denotes a main bus bar having a plurality of screw holes 801 and 801 '. The sub bus bar blocks 7, 7' are screwed into the screw holes 801 and 801 'by screws 9, 9'.
The connection is fixed so as to overlap with the subbar 8 in parallel . The conduction capacity of the main bus bar 8 is theoretically not required to be greater than the conduction capacity of the sub bus bar block 7 'if only two sub bus bar blocks are connected in parallel as shown in FIG. It is sufficient to use a strip-shaped copper body having a width of about 1.5 mm and a width of about 10 mm. When connecting more sub-bus bar blocks after the sub-bus bar blocks 7 ', a strip-shaped copper body having a thickness of about 3 mm and a width of about 13 mm is required as a current carrying capacity of 100A. Power is supplied to the copper busbar by tightening the power supply line 10 with the screw 9 and the screw hole 801 together with the screw through hole 703, and a plurality of branch connection feet 702 and 702 'are respectively connected to the branch breaker. Connect to the terminals to split the power supply into each branch breaker circuit. FIG. 4 shows a second embodiment of the present invention. In addition to the first embodiment of FIG. 1, screw holes 704, 704 'are provided in the sub bus bar blocks 7, 7', and the main bus bar 8 is provided. Are provided with screw holes 802 and 802 '
The portions 704 and 704 'are connected by 1, 11', and further connected to the main bus bar 8 so as to be parallel to the sub bus bar block 7 ". In such a configuration, the sub bus bar The current flowing through the block 7 "can flow proportionally to the main bus bar and the sub bus bar block 7 'between the main bus bars 801' and 802 ', and the current flowing through the sub bus bar blocks 7' and 7" 801 to 80 of busbar 8
Main bus bar and sub bus bar block 7 between 2
So that the sub bus bar blocks 7, 7 'and the main bus bar 8 together have a flow rate of 100A.
With a current carrying capacity of 100 A, a bus bar having a current carrying capacity of 100 A as a whole can be constructed.
The current carrying capacity of about 60A is sufficient and the thickness is 1.5mm
A strip-shaped copper body having a width of about 10 mm can be sufficiently constituted. As described above, according to the present invention, a plurality of three-to-four branch connection feet and screw through-holes are integrally formed in a sub copper busbar part having a current carrying capacity of 60 A. Of the sub busbar block having a plurality of screw holes
The main bus bar having the current carrying capacity of A is overlapped so as to be parallel to the main bus bar. <br/> Because it is connected and fixed with a plurality of screws, it is connected to the bus bar portion from a single copper plate having a thickness of 2 to 3 mm by conventional press punching. Compared to the one in which the foot is integrally molded, the sub busbar block can be formed by punching a copper plate of about 1.5 mm in thickness, and the material of the branch connection foot and the waste material can be saved by the thickness. The use of the copper strip in the main bus bar eliminates any waste material, thereby improving the overall material yield and reducing material costs. Also, compared to the conventional branch breaker, in which the branch connection bar is screwed or tacked to the main bar, the number of places for screwing and tacking can be reduced to a fraction, and assembly is simplified. .
Furthermore, it is said that the molds for molding the components constituting the bus bar need only one or two types of molds for the sub bus bar and a simple mold for drilling the strip-shaped copper body, thereby improving the economic efficiency as a whole. effective.

BRIEF DESCRIPTION OF THE 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 second embodiment of a copper bus bar of the present invention. FIG. 3 is a second conventional example. FIG. 4 is a diagram of a first conventional example. [Description of References] 7, 7 ′, 7 ″... Sub bus bar blocks 701, 701 ′, 701 ″. 702 "... screw through hole 8 ... main bus bar 801, 801 ', 802" ... screw hole 9, 9', 9 "... screw

Continuation of the front page (56) References JP-A-54-69781 (JP, A) JP-A 55-100407 (JP, U) JP-A 6-41313 (JP, U) JP-A 51-44878 (JP) , U) Hikaru Hei 3-34604 (JP, U) Hikaru Sho 54-114732 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02B 1/40, 1/20

Claims (1)

(57) [Claim 1] A bus bar for supplying current to a branch breaker
The bus bar is connected to a sub copper bus having a branch breaker connecting foot.
The sub-copper busbar portion of the sub-copper busbar block is composed of a sub- bar block and a main copper busbar.
A rated current carrying capacity and three
It is assumed that four branch breaker connection feet are formed integrally.
The main copper bus bar has a through hole with a rated current of 60-100A.
The main copper busbar has the screw through hole
A main copper bus bar having a plurality of corresponding screw holes and a plurality of the sub copper bus bar blocks.
Parallel with the screw and screwed at appropriate intervals, and apply the current to the main copper busbar and the sub copper busbar.
75 to 10 characterized by being proportionally divided into blocks
Copper busbar configuration of 0A rated residential distribution board.