JPS6237366Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a power distribution device, more specifically, a branch box used in a distribution board through which a single-phase three-wire bus bar is passed, and a breaker connected to the branch box that receives two types of rated voltages, large and small. This relates to the connection structure of.

Generally, a single-phase three-wire branch box used in a distribution board is formed by attaching busbars 2, 2, 2 to a base 1 with screws 3, as shown in FIG. Therefore, the bulk is large, the insulation performance is not perfect, and since the connection with the terminal of the breaker 4 is mainly a screw connection using the screw 6, there is a problem of lack of reliability.

The present invention was developed in view of the above points, and the main objectives are to reduce the size of the branch box, protect live parts, improve insulation performance, and improve connection reliability with the breaker. It is an object of the present invention to provide a power distribution device that can improve the power supply voltage and use two types of breakers with different rated voltages without erroneously connecting them.

The present invention will be explained in detail below based on embodiments shown in the figures. The power distribution device according to the present invention consists of three mutually independent busbars 2 arranged vertically in an elongated insulator 7,
It consists of a branch box 8 in which 2, 2 are embedded along the longitudinal direction of an insulator 7, and a breaker 4 connected by abutting the end surface of the branch box 8 in the width direction. Three types of connection pieces 9a, 9b, and 9c that are continuous with each bus bar 2 protrude from the end face in the direction, and the two bus bars 2 that are lined up above and below are bent vertically into a wave shape, and the remaining bus bar is straight. , the two generatrix bars 2 bent into a wave shape match each other peak-to-peak and valley-to-valley, so that the troughs of the upper generatrix bar 2 and the peaks of the crest generatrix bar are on approximately the same plane. The three types of connection pieces 9a, 9b, 9c are placed outside the branch box 8 from the troughs of the upper bus bar 2, the peaks of the lower bus bar 2, and a portion of the remaining straight bus bar 2, respectively. A plurality of sets of protruding connection blocks formed of three types of connection pieces 9a, 9b, and 9c are formed along the longitudinal direction of the branch box 8, and three types of connection pieces 9a, 9b, and 9c are formed on the end face of the breaker 4. Three connecting holes 20a, 20b, 20c are formed to be inserted, and two connecting holes 20a, 20 that are laterally separated from each other among the three connecting holes 20a, 20b, 20c are formed.
Terminals 5 electrically connected to two of the three types of connection pieces 9a, 9b, 9b, 9c are provided in the connection pieces 9a, 9b, 9c.
and the terminal 5 are connected by pressure contact, and the second
As shown in the figure, it is used by being housed in a distribution board A together with a main switch 10 and a power receiving terminal block 11, and the branch boxes 8 are usually connected at their ends. That is, at both ends in the longitudinal direction of the branch box 8, there are three generatrix bars 2, 2, 2 embedded inside, respectively, as shown in FIG.
If two branch boxes 8 are to be connected, as shown in FIGS. 6 and 7, they should be connected using a connecting tool 12 with a screw 12a, and one end of the branch box 8 should protrude. An insulating cap 13 is attached to the end, and a power receiving terminal block 11 is connected to the other end via a connector 12. Two types of breakers 4a and 4b with different rated voltages of 100V and 200V are connected to this branch box 8. When connecting the breaker 4a for 100V, the S-phase and R-phase busbars are connected. Bar 2, 2, i.e. the 9th
Breaker 4 is attached to the lower two bus bars 2 and 2 in the figure.
When connecting terminal 5 of terminal a and connecting breaker 4b for 200V, connect the R phase and T phase bus bars 2, 2,
That is, the terminal 5 of the breaker 4b is connected to the upper two bus bars 2, 2 in the figure. Of the three bus bars 2 arranged vertically in the branch box 8, the top two bus bars 2 are bent vertically in a square wave shape, and the remaining one, the bottom bus bar 2, is directly above the bus bar 2. A plurality of connection pieces 9 each from 2
a, 9b, and 9c protrude from the end surface of the branch box 8 in the width direction. The upper two generatrix bars 2 are arranged so that their peaks and valleys correspond to each other vertically, and the valleys of the upper generatrix bar 2 and the peaks of the middle generatrix bar 2 are on the same plane. The connecting piece 9c of the upper bus bar 2 extends horizontally from the trough, and the connecting piece 9b of the middle bus bar 2 extends horizontally from the peak. The connecting piece 9c of the branch box 8 protrudes at the same position in the longitudinal direction of the branch box 8 in a straight line up and down, and the connecting piece 9b of the middle bus bar 2 and the connecting piece 9c of the upper bus bar 2 are at the same height. are arranged at equal intervals along the length. On the other hand, on the end face of the breaker 4 attached to this branch box 8, there are three types of connection pieces 9a, 9.
Three connection holes 20a, 20b, according to b, 9c,
20c, terminals 5 are disposed in two of the three connection holes, and are connected to two of the three bus bars 2 via connection pieces, as shown in FIGS. 14 and 17. As shown in the figure, the connecting piece 9a of the S-phase bus bar 2 and the connecting piece 9b of the R-phase bus bar 2
Breaker 4a for 100V electrically connected to
Two types are used: breaker 4b for 200V.
In other words, connection holes 20b and 20c into which connection pieces 9b and 9c are inserted are lined up side by side at the same height on the top of the end face of the 100V breaker 4a, and the connection hole 20c
A connecting hole 20a into which the connecting piece 9a is inserted is formed below the connecting hole 20a, and two connecting holes 2 are diagonally opposed to each other.
Terminals 5 of the breaker 4 are arranged in 0a and 20b, and connection holes 20b and 20c, into which connection pieces 9b and 9c are inserted at the same height position, are arranged side by side at the top of the end face of the 200V breaker 4b. , connection hole 20c
A connection hole 20a into which the connection piece 9a is inserted is formed below, and two connection holes 20b arranged side by side,
Terminals 5 are disposed within the terminal 20c and are attached to the end faces of the branch box 8 in the width direction, respectively, to take out power of 100V and 200V from the branch box 8. Here, the pair of connection holes 20a, 20b, 20b, 20c in which the terminals 5 are built-in are respectively wider openings in the vertical direction than the remaining one, and the connection pieces 9a, 9b and 9b are inserted into the openings. ,9c
is pushed upward by a spring 22 and connected to the terminal 5 by pressure contact. That is, the terminal 5 used here has a connecting terminal structure composed of a terminal frame 5c, a spring 22, and a release button 23, as shown in FIG. 18, and has connection holes 20a, 20b,
The connecting pieces 9a, 9b, and 9c inserted into the terminal frame 5c are pushed upward by the spring 22 and pressed into contact with the upper piece of the terminal frame 5c. Connection holes 20a, 20 having
Insert the tip of a screwdriver or the like into the through hole 24 that opens on the top surface of the breaker 4 and communicates with the breaker 4.b, 20b, and 20c, press down the release button 23, and push the spring 22 downward. is removed from the connection holes 20a, 20b, and 20c.

As described above, the present invention forms a branch box by embedding three busbars independently of each other along the longitudinal direction of the insulator in an elongated insulator.
Three types of connecting pieces that are continuous with each bus bar protrude from the end face in the width direction of the branch box, so unlike conventional models where the entire bus bar is exposed, only the connection point with the breaker is exposed as a connecting piece. The insulation performance is improved, and three busbar ducts can be embedded vertically in the insulator, making the width smaller than conventional ones, making the whole compact. Moreover, since the connecting piece is pressure-welded to the breaker terminal, the electrical connection is reliable and the contact reliability is improved. Furthermore,
Three connection holes into which three types of connection pieces are inserted are formed on the end face of the breaker, and two of the three types of connection pieces are inserted into two connection holes that are laterally separated from each other among the three connection holes. Since there is a terminal that can be electrically connected to the branch box, breakers with different rated voltages, such as those for 100V and 200V, can be connected to the branch box without erroneously connecting them.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a conventional example, FIG. 2 is a schematic plan view showing an example of use in an embodiment of the power distribution device according to the present invention, and FIG. 3 is a front view showing an example of the present invention. , FIG. 4 is a side view of the same, FIG. 5 is a partially cutaway side view of the same, FIG. 6 is a plan view showing an example of use of the same, FIG. 7 is a partially cutaway front view of the same, and FIG. The figure is a plan view of the branch box used in the above, No. 9.
The figure is a front view of the same as the above, Fig. 10 is a back view of the above, Fig. 11 is a right side view of the same as the above, Fig. 12 is a sectional view taken along the - line in Fig. 8, and Fig. 13 is a 100V used in the same as the above.
Fig. 14 is a right side view of the breaker used in the above, Fig. 15 is a partially cutaway front view of the breaker used in the above, Fig. 16 is a 200V breaker used in the same.
17 is a right side view of the breaker used in the above, FIGS. 18a and 18b are explanatory diagrams showing the connection structure between the terminal and the connection piece used in the above, and 2 is a busbar bar. , 4 is a breaker, 5 is a terminal, 7 is an insulator, 8 is a branch box, 9a, 9b, 9
c is a connecting piece, and 20a, 20b, 20c are connecting holes.

Claims (1)

[Scope of utility model registration request] A branch box in which three mutually independent busbars lined up vertically in a long and thin insulator are embedded along the length of the insulator, and a breaker that is connected by abutting its end face against the widthwise end face of the branch box. Three kinds of connection pieces that are continuous with each bus bar protrude from the end face in the width direction of the branch box, and the two bus bars lined up above and below are bent vertically into a wave shape, and the remaining bus bar is straight. The two generatrix bars bent into a wave shape match each other peak-to-peak and valley-to-valley, and the valleys of the upper generatrix bar and the peaks of the crest generatrix bar are placed on approximately the same plane. The above three types of connection pieces protrude outside the branch box from the troughs of the upper bus bar, the peaks of the lower bus bar, and a part of the remaining straight bus bars, respectively, and the one formed by the three types of connection pieces is A plurality of sets of connection blocks are formed along the longitudinal direction of the branch box, and three connection holes into which three types of connection pieces are inserted are formed on the end face of the breaker. A power distribution device in which a terminal that is electrically connected to two of the three types of connection pieces is provided in two connection holes, and the connection piece and the terminal are connected by pressure contact.