JP2001292510A - Connecting conductor device for distribution board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate incorporate a connecting conductor device for relaying a main breaker to a bus, and to reduce the number of steps in connecting process in a distribution board. SOLUTION: Connecting conductors 12, 13, 14 for each phase of the connecting conductor device 8 are structured by fastening terminal strips 12a, 13a, 14a in the same row, with a negative side terminal 4 of a main breaker 3 to each of connecting strips 12b, 13b, 14b that cross the terminal strips. With regard to the connecting conductor of the neutral phase in particular, the terminal strip 13a is fastened to the connecting strip 13b via L-shaped relay conductors 13d, 13e. The connecting strips 12b, 13b, 14b for each phase are arrayed in step-like shape toward the connection ends of the buses 5, 6, 7, in such a way as not to be piled on top of the other. The buses 5 to 7, stacked in three layers, are tightened on these connecting strops 12b, 13b, 14b with screws 24 to 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distribution board mainly used as a light distribution board, and more particularly to a connection conductor device for relaying between a main circuit breaker and a bus bar.

[0002]

2. Description of the Related Art The inventors of the present invention first wrote a paper having a width of 27 mm.
Has developed a two-pole type circuit breaker (wiring breaker and earth leakage breaker) that accommodates a two-pole opening and closing part within the JIS agreement type dimensions. A patent application has been filed (see Japanese Patent Application Laid-Open No. 10-064402). This circuit breaker is a common type width dimension (27mm) for both 100V circuit and 200V circuit in single-phase three-wire circuit.
The circuit breaker can be wired with a single circuit breaker, thereby reducing the installation space for the circuit breaker in the distribution board and reducing the number of wiring steps.

Further, the inventors of the present invention have disclosed a distribution board to which a small two-row branch circuit breaker can be plugged in and connected, and a branch circuit breaker used therewith, and in particular, the above-mentioned agreement type one pole size / two pole type circuit breaker. A branch circuit breaker suitable as a circuit breaker was developed, and a patent application was also filed by the applicant of the present application (see Japanese Patent Application Laid-Open No. 11-262115). In this distribution board, three bus bars made of a rectangular conductor for connecting a main circuit breaker and a branch circuit breaker are arranged in a stacked manner via an insulating bush, so that three bus bars are equivalent to one bus bar. The required space is reduced by keeping the width within the width, and a branch conductor is not required by inserting and connecting a branch breaker to both sides of the bus bar.

[0004]

SUMMARY OF THE INVENTION The present invention is directed to a connection conductor device for relaying between a main circuit breaker and a bus bar in the above-mentioned distribution board in which bus bars are arranged in a flat stack. The object of the present invention is to facilitate connection work and production.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a main circuit breaker in a distribution board in which busbars made of a plurality of rectangular conductors are vertically stacked with an interval therebetween. In the connection conductor device used for relaying between the load side terminal and the bus bar, a terminal plate screw-connected in the same row as the load side terminal, orthogonal to the bus bar,
A plurality of connection conductors having a connection plate screw-connected to the back surface of the bus bar are housed in an insulating case having an open front surface, and connection ends of the terminal plate with the load-side terminals are arranged in a horizontal line in the same plane. While arranging, the connection plates are arranged in a stepped manner with steps in order toward the connection terminal side of the bus bar, and at least the bus bar passes through the back surface of the insulating case and the side wall on the bus bar side. When the connection plate is opened by a width and the connection plate is connected to the bus bar, the insulating case is moved to the main circuit breaker side by a width corresponding to one step of the stairs with respect to a connection terminal of the bus bar, and the insulating case is connected to the bus bar Then, the connection terminal of the bus bar is overlapped with the front surface of the connection plate by shifting the position of the bus bar to the bus bar side by the width of one step, and It is to the front opening of the case to tighten the screw (claim 1).

According to the first aspect, the bus bar is assembled in the distribution board box in advance, and then the connection conductor device is inserted into the distribution board box from the front side, and the bus bar side is moved by the distance of one step of the stairs. Since the bus bar and the connection conductor device can be connected only by shifting the position, the assembly and connection work of the connection conductor device become easy.

In the first aspect of the present invention, it is preferable that the connection conductor is formed by forming a terminal plate and a connection plate with separate band conductors and fastening them together with screws (claim 2). This eliminates the need for a complicated press die and improves the material yield, as compared with the case where the connection conductor is formed by integrally forming the terminal plate and the connection plate by punching and bending from a plate material.

In a single-phase three-wire distribution board, a terminal plate of the neutral-phase connection conductor is formed of an L-shaped conductor consisting of a band conductor parallel to the connection plate of the connection conductor and a band conductor orthogonal to the connection plate. It is preferable to fasten to the connection plate outside any of the terminal plates in the left and right phases via the relay conductor of (3). Thereby, the axis of the bus bar can be made to coincide with the center line of the main circuit breaker and the connecting conductor device without being hindered by the neutral phase terminal plate.

In the second or third aspect, when the distribution terminals are integrally formed on both ends of the connection plate of the connection conductor of each phase, the foremost connection plate is bent in a convex shape, and the connection terminals of the both ends are formed. The distribution terminal may be retracted to the back of the distribution board (claim 4). Thereby, the insulation distance between the distribution terminal formed on the frontmost connection plate and the middle door of the distribution board can be increased.

In each of the connection conductor devices, it is preferable that the insulating case is provided with an insulating cover that integrally covers the front opening and the load-side terminal of the main circuit breaker.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. First, Fig. 1 shows the connection between the bus bar in the distribution board and the circuit breaker.
(A) is a front view, (B) is its bottom view. In FIG. 1, a mounting base 1 made of a steel plate is formed by bending mounting flanges 1 a on both right and left sides, and is fixed to a bottom surface of a distribution board main body (not shown) by screws passing through mounting holes 2. A three-pole main circuit breaker 3 is fixed to the upper center of the mounting base 1 with screws, and R, N, and
The three bus bars 5, 6, and 7 constituting the T phase are connected via the connection conductor device 8.

The bus bars 5, 6, and 7 are made of rectangular conductors of the same size, and are arranged in a flat stack via insulating bushes 9 (FIG. 1B) inserted at several points in the longitudinal direction, that is, the bottom surface of the distribution board. Are arranged in parallel at equal intervals in the vertical direction, and are fastened to the mounting base 1 by screws 10 penetrating the insulating bush 9. The busbars 5, 6, and 7, which are R, N, and T phases, respectively, constitute a single-phase three-wire circuit, with 100 V AC between the R phase and T phase and between the T phase and N phase, and 200 V AC between the R phase and T phase. . As shown in FIG. 4, the connection terminals of the busbars 5, 6, and 7 are gradually increased in a stepwise manner from the upper part of FIG. 4 to the lower part (in the installed state of the distribution board, from front to back). As shown in FIG. 1, on the left and right sides of the bus bars 5, 6, and 7, a large number of two-pole branch circuit breakers 11 are arranged in a horizontal row, and the power supply side thereof is connected to the bus bars 5, 6 via terminal plugs (not shown). ,
7 (for the detailed configuration of the branch circuit breaker 11, refer to Japanese Patent Application Laid-Open No. 11-262115).

2 to 5 show the main circuit breaker 3 and the bus bar 5,
FIG. 2 is a front view, FIG. 3 is a left side view thereof, and FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 5 is a perspective view of the insulating case as viewed from the near side, and FIG. 6 is a perspective view of the same as viewed from the right side of FIG. In these figures, R, N and T-phase connection conductors 12, 13 and 14 are connected to terminal plates 12a, 13a,
14a, and connecting plates 12b, 13b, and 14b connected to the bus bars 5, 6, and 7 orthogonally to the bus bars. Terminal plates 12a, 13a, 14a and connection plates 12b, 1
3b and 14b are separately cut out of the band conductor, and left and right phase (R, T phase) terminal plates 12a, 14a and connection plates 12b,
14b is fastened directly by screws 15,17.

On the other hand, the neutral-phase (N-phase) terminal plate 13a
L consisting of a band conductor 13d parallel to the connection plate 13b and a band conductor 13e fastened by screws 18 so as to be orthogonal to the band conductor 13d.
It is fastened to the connection plate 13b outside the T-phase terminal plate 14a (on the right side in FIG. 2) via a shaped relay conductor. That is, the terminal plate 13a is fastened to the band conductor 13d by the screw 19, and the band conductor 13e is fastened to the connection plate 13b by the screw 16. On the same row as the N-phase terminal plate 13a, that is, on the center line of the main circuit breaker 3, each phase connection plate 12b, 13b, 14b
The connection holes 20 to screw the busbars 5 to 7
22 has been opened.

Here, the connection ends of the terminal plates 12a, 13a and 14a with the load-side terminals 4 (FIG. 1) are arranged in a horizontal line in the same plane. On the other hand, the terminal plates 12a, 13a, 1
The connection plates 12b, 13b, 14b orthogonal to 4a are arranged stepwise with steps in the phase toward the connection terminals (upper side in FIG. 2) of the bus bars 5 to 7 so as not to overlap each other between the phases. Therefore, the terminal plates 12a and 14a are bent in an S shape toward the level of the terminal plate 13a as shown in FIG. As shown in FIG.
b, 13b, and 14b, distribution terminals 12c, 1 for connecting the main circuit breaker 3 to circuits other than the bus bars 5 to 7 are provided at both ends.
3c and 14c are integrally formed, and a terminal screw 31 is provided. In this case, only the foremost connection plate 12b is bent in a convex shape, and the distribution terminals 12c at both ends thereof are retracted to the same level as the distribution terminals 14c of the innermost connection plate 14b. The above-described phase connection conductors 12 to 14 are housed in an insulating case 23 shown in FIG.

In FIG. 5, an accommodating space is formed in an insulating case 23 made of a molded resin in accordance with the shape of each phase connection conductor 12 to 14, and each space is separated by a phase space wall. The connection conductors 12 to 14 are screwed into the connection plates 12b, 13b, 14b (FIG. 2) respectively supported on the step-like mounts 23a, 23b, 23c from the back side of the insulating case 23 through a pair of left and right holes 23d. It is fixed to the insulating case 23 by screws (not shown). Here, window holes 23e and 23f for inserting the bus bars 6 and 7 are formed in the partition wall between the mounts 23a and 23b and the partition between the mounts 23b and 23c, respectively. As shown in FIGS. 4 and 6, openings 23 g and 23 h having a width through which the bus bars 5 to 7 pass are formed on the back surface of the insulating case 23 and the side wall on the bus bar side (the right side in FIGS. 4 and 5). It is opened in the front-back direction.

When connecting the connection conductor device 8 described above,
Busbars 5-7 are assembled in the distribution box first.
Thereafter, as shown in FIG. 7, the connection conductor device 8 is connected to the connection terminals of the bus bars 5 to 7 by the connection plate 12 in which the connection plates 12 are arranged stepwise.
At positions where the width A of one step of steps b, 13b, and 14b is shifted toward the main circuit breaker (left side in FIG. 7), bus bars 5 to 7 are inserted into the distribution board so as to cover them. At this time, the bus bars 5 to 7 pass through the openings 23g and 23h of the insulating case 23. Then, the positions of the bus bars 5 to 7 are shifted to the side of the bus bars 5 to 7 by the width A of one step, and the connection terminals of the bus bars 5 to 7 are superimposed on the upper surfaces of the connection plates 12b, 13b, and 14b as shown in FIG. Thereafter, screws 24 to 26 are screwed into the square nut 27 through holes (not shown) of the bus bars 5 to 7 and holes 20 to 22 (FIG. 2) of the connection plates 12b, 13b, 14b, and tightened as shown. Thereafter, the terminal plate 12
a, 13a and 14a are fastened to the load-side terminals 4 of the main circuit breaker 3 with terminal screws 28 (FIG. 1). Finally, insulation case 2
Insulating cover 29 that integrally covers the front surface of load 3 and load side terminal 4
(FIGS. 2 and 3) are attached, and the four corners are fixed to the insulating cover 29 with screws. The connection conductor device 8 is attached to the mounting base 1 through the mounting holes 30 at the four corners of the insulating case 23.
It is fixed by screws screwed into (FIG. 1).

In such a connection conductor device 8, the back surface of the insulating case 23 and the side wall on the bus bar side are opened by the width that allows the bus bars 5 to 7 to pass through.
When connecting busbars 5 to 7 to b, 13b and 14b,
The connection conductor device 8 inserted in the distribution board box can be set at the connection position only by shifting the connection conductor device 8 toward the bus bar by the width A of one step of the connection plates 12b, 13b, and 14b arranged in a stepwise manner. The work space in the distribution board box in which the bus bars 5 to 7 and the main circuit breaker 3 have been assembled in advance can be reduced.

The terminal plates 12 of the connection conductors 12 to 14
a, 13a, 14a and connecting plates 12b, 13b, 14b
Are formed of separate band conductors and are integrally fastened with screws 15 to 19, so that a complicated press die is not required as compared with the case where the connection conductors 12 to 14 are integrally formed from a plate material. Material yield is improved.

On the other hand, the terminal plate 13 of the connection conductor 13 of the neutral phase
a is fastened to the connection plate 13b outside the terminal plate 14a in one of the left and right phases (T phase in the illustrated embodiment) via the L-shaped relay conductors 13d and 13e, and is connected to the terminal plate 13a in the neutral phase. Since the bus bars 5 to 7 are connected to the connection plates 12b, 13b, and 14b of each phase on the same row, the arrangement centers of the main circuit breaker 3, the connection conductor device 8, and the branch circuit breaker 11 can be matched with good appearance. Since the tightening screws 24 to 26 are all visible from the front, the initial connection work and the additional tightening work of the screws at the time of inspection are easy.

Further, the foremost (R-phase) connection plate 12b is bent in a convex shape, and the distribution terminals 12c at both ends thereof are connected to the innermost stage (T
Since the terminal is retracted to the same level as the distribution terminal 14c of the connection plate 14b), the insulation distance between the middle door of the distribution board (not shown) close to the front surface of the connection conductor device 8 and the terminal screw 31 of the distribution terminal 14c. Can be sufficiently secured.

[0022]

As described above, according to the present invention, the work of assembling the connecting conductor device to the distribution board and connecting to the bus bar are facilitated, the manufacturing cost is reduced, the cost is low, the appearance is good, and A highly reliable distribution board can be manufactured.

[Brief description of the drawings]

FIG. 1 is a front view of a main part inside a distribution board showing an embodiment of the present invention.

FIG. 2 is a front view of the connection conductor device in FIG. 1;

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2;

FIG. 5 is a perspective view of the insulating case shown in FIG. 2 as viewed from the front side.

FIG. 6 is a perspective view of the insulating case of FIG. 5 viewed from the right side.

FIG. 7 is a longitudinal sectional view illustrating an operation of inserting the connection conductor device of FIG. 2 into a distribution board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mounting base 3 Main circuit breaker 4 Load side terminal 5 R-phase bus bar 6 N-phase bus bar 7 T-phase bus bar 8 Connection conductor device 11 Branch circuit breaker 12 R-phase connection conductor 12a Terminal plate 12b Connection plate 13 N-phase connection conductor 13a Terminal plate 13b connecting plate 14 T-phase connecting conductor 14a terminal plate 14b connecting plate 23 insulating case 29 insulating cover

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Noriichi Sato 1-1-1, Tanabe-Nita, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside Fuji Electric Co., Ltd. (72) Inventor Kiyofumi Ozaki 976 Nishiura, Habikino-shi, Osaka F-term in Hata Electric Works (reference) 5G016 AA04 DA05 DA24 DA26 DA31 5G030 XX12 YY04 5G365 AA01 AB05 AC01 AC03 AD06

Claims (5)

[Claims] A bus bar made of a plurality of rectangular conductors is used for relaying between a load-side terminal of a main circuit breaker and the bus bar in a distribution board which is vertically stacked with an interval therebetween. In the connection conductor device, a terminal plate that is screw-connected in the same row as the load-side terminal and a connection plate that is orthogonal to the bus bar and has a connection plate that is screw-connected to the back surface of the bus bar, the front surface of which has a plurality of phases. It is housed in an open insulating case, and the connection ends of the terminal plates with the load-side terminals are arranged in a horizontal line in the same plane, while the connection plates are provided with steps in the phase toward the connection terminal side of the bus bar. When the connecting plate is connected to the bus bar, the rear surface of the insulating case and the side wall on the bus bar side are opened at least by a width passing through the bus bar. At a position shifted to the main circuit breaker side by the width of one step of the stairs with respect to the connection terminal, the insulating case is inserted into the distribution board so as to cover the bus bar, and then only the width of the one step. The connection conductor device for a distribution board, wherein the connection terminal of the bus bar is shifted to the bus bar side, the connection terminal of the bus bar is overlapped on the front surface of the connection plate, and the terminal is tightened with a screw from a front opening of the insulating case. 2. The connection conductor according to claim 1, wherein the terminal plate and the connection plate of the connection conductor are formed of separate band conductors, and these are integrally fastened with screws to form the connection conductor. Connection conductor equipment for electrical boards. 3. A single-phase three-wire distribution board, wherein a terminal plate of the neutral-phase connection conductor is formed of a band conductor parallel to the connection plate of the connection conductor and a band conductor orthogonal to the connection plate. The connection conductor device for a distribution board according to claim 2, wherein the connection plate is fastened to the connection plate outside one of the terminal plates in left and right phases via a relay conductor having a shape. 4. A distribution terminal is integrally formed at both ends of a connection plate of the connection conductor of each phase, and the foremost connection plate is bent in a convex shape, and the distribution terminals at both ends are connected to a rear side of a distribution board. The connection conductor device for a distribution board according to claim 2 or 3, wherein the connection conductor device is retracted. 5. The insulating case according to claim 1, wherein an insulating cover for integrally covering a front opening of the insulating case and a load terminal of the main circuit breaker is mounted on the insulating case. Connection conductor equipment for distribution boards.