JP2808732B2 - Connection conductor of circuit breaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention relates to a connection conductor of a circuit breaker for connecting a main circuit breaker and a branch circuit breaker in a distribution board, a distribution board, or the like.

[Prior art]

For example, in a distribution board, one three-phase main circuit breaker and a plurality of branch circuit breakers arranged sideways so that the power supply side faces each other in two rows on the power supply side. Conventionally, as shown in FIG. 6, a main circuit breaker 4 is connected to a three-phase main conductor (bus bar) 1 arranged in parallel in the width direction so as to be perpendicular to the main conductor 1 as shown in FIG. The branch circuit breaker 5 is connected to the branch conductor 2 fastened with the screw 3 (see Japanese Utility Model Laid-Open No. 59-13006).

[Problems to be solved by the invention]

However, such a conventional connection method has the following problems. (1) Since the three-phase main conductors 1 are arranged in the width direction, the required space in the lateral direction (left-right direction in the drawing) is large. (2) Since the main conductor 1 and the branch conductor 2 are assembled in a lattice shape using the screws 3, it takes a long time for wiring. (3) Since it is difficult to attach an insulating cover to the grid-like conductors 1 and 2, the charged part is exposed to the front of the panel, which is dangerous. Therefore, an object of the present invention is to solve the above-mentioned problems and to provide a connection conductor for a circuit breaker that saves space in a distribution board, a distribution board, and the like, reduces wiring man-hours, and improves safety. It is.

[Means for Solving the Problems]

In order to achieve the above object, the connecting conductor of the circuit breaker of the present invention has one end connected to each phase power supply side terminal of the main circuit breaker and the other end overlapping the upper and lower sides with the center phase as the center. A longitudinal conductor of three phases and a relay conductor consisting of a three-phase lateral conductor which is orthogonally coupled to the other end of each of the longitudinal conductors and whose left and right ends are connected to each phase power supply side terminal of the branch circuit breaker; The two rows of the branch circuit breakers extend along the power supply side and are arranged in parallel with each other in the thickness direction.
A set of three-phase main conductors; a set of three-phase main conductors; a set of branch conductors which are derived from the lower side of each set of the main conductors at right angles in the horizontal direction for each of three phases and are sequentially connected to each of the branch circuit breakers; And a comb-shaped insulating cover in which three main phases are collectively covered with the main conductor and a partition wall is inserted between the main conductors. The horizontal conductor of the relay conductor overlaps with the branch conductor to interrupt the main circuit. Connected to the power supply side terminal of the branch circuit breaker closest to the circuit breaker.

[Operation]

In the present invention, the main conductors are arranged in the thickness direction, and the vertical conductors of the relay conductors connecting the main circuit breaker and the main conductors are vertically overlapped with the central phase in the middle.
The required horizontal space is small. The branch conductor derived from the main conductor can be cut and bent integrally from the main conductor, or can be integrated beforehand by brazing or the like, so that it is not necessary to fasten screws when wiring. Since the main conductor and the branch conductor cross each other on the lower side of the main conductor, the main conductor can be covered with an insulating cover from the upper surface. At that time, the partition walls of the insulating cover can be inserted between the main conductors so that the phases can be insulated from each other. Therefore, the interval between the main conductors can be reduced to about the thickness of the partition walls, thereby further reducing the required space in the lateral direction.

【Example】

FIG. 1 is a front view showing an embodiment of the present invention in a distribution board. In the figure, 4 is a single three-phase main circuit breaker, 5 is a plurality of branches arranged sideways on the power supply side of the main circuit breaker 4 in two rows on the left and right sides and the power supply sides face each other. A circuit breaker, 6 is a main conductor, 7 is a branch conductor derived from the main conductor 6, and the main conductor 6 is connected to the main circuit breaker 4 via relay conductors 8 and 9. Reference numeral 10 denotes an insulating cover that covers the main conductor 6, and reference numeral 11 denotes an insulating relay box that sandwiches the relay conductor 9 from above and below. FIG. 2 is an enlarged perspective view showing the main conductors 6 (6R to 6T) and branch conductors 7 (7R to 7T) in the left column in FIG. 1. The main conductors 6R to 6T are parallel to each other in the thickness direction. And the interval between them is so small that a partition wall of an insulating cover to be described later is finally inserted. From the lower side of these main conductors 6R to 6T, branch conductors 7R to 7T for three phases each at right angles in the horizontal direction are integrally led out by cutting and bending in the order of phase, and a U-shaped hole 7a at the tip end is formed.
Are sequentially connected to a plurality of (five in the figure) branch circuit breakers 5 by terminal screws 5a (FIG. 1) passing therethrough. The main conductor 6 is covered with an insulating cover 10 shown by a two-dot chain line in FIG. 2, as shown in the sectional view of FIG. It is composed of a top plate 10c to be connected, and is integrally formed of resin. The insulating cover 10 is pushed over the main conductor 6 from above so that the partition 10b is inserted between the main conductors 6R to 6T. At this time, the positioning ridges 10d formed inside the upper surface plate 10c and the gripping ridges 10e formed on the opposing surfaces of the side wall 10a and the partition wall 10b are elastically deformed, and the insulating cover 10 has a predetermined posture. Is securely attached. FIG. 5 is a perspective view of the main conductor 6 covered with the insulating cover 10 as viewed from the back side. Reference numeral 12 denotes a box-shaped end cover fitted to the end of the insulating cover 10. FIG. 3 is a perspective view showing the configuration of the relay conductors 8 (8R to 8T) and 9 (9R to 9T). The relay conductors 8 and 9 are three-phase horizontal conductors 9R so as to be orthogonal to the three-phase vertical conductors 8R to 8T, respectively.
99T are connected by brazing. The vertical conductors 8R to 8T, one end of which is connected to each phase power supply side terminal of the main circuit breaker 4 by the terminal screw 4a, respectively, have the other end with the straight central phase 8S inside and the left and right phases 8R and 8T Overlapping. The left and right ends of the horizontal conductors 9R and 9T are bent up and down, respectively, and are aligned on the same plane as the left and right ends of the straight horizontal conductor 9S. The left and right ends of the relay conductors 9R to 9T located on the same plane are connected to the branch conductors 7R to 7T at the uppermost branch circuit breaker 5 in FIG. 1 by terminal screws 5a passed through U-shaped holes 9a. It is tightened repeatedly. The insulating junction box 11 is not shown in detail, but is divided into upper and lower parts, and the relay conductors 8R to 8T and the relay conductors 9R to
Grooves are provided according to 9T, these conductors 8R ~ 8T, 9R ~ 9
It is screwed around T. According to the illustrated configuration, the vertical conductors 8R to 8T have the left and right phases 8R and 8T overlap with each other vertically above and below the central phase 8S, and the main conductors 6 are arranged in parallel in the thickness direction, so that the horizontal dimensions Becomes smaller. Further, since the branch conductor 7 crosses the lower conductor under the main conductor 6, it is possible to cover the main conductor 6 with the insulating cover 10, and the charged portion is not exposed on the front surface of the distribution board. Since the main conductors 5 are separated by the partition walls 10b of the cover 10, the distance between the main conductors 6 is reduced by the partition walls 10b.
The space required can be further reduced in combination with the arrangement of the main conductors 6 in the thickness direction. Further, since the branch conductor 7 can be stocked while being integrally formed with the main conductor 6, it is not necessary to fasten the screw at the time of wiring, and the number of assembly steps of the distribution board is reduced. In the illustrated embodiment, the branch conductor 7 is integrally cut and formed from the main conductor 6. However, the branch conductor 7 may be separately manufactured into an L shape and joined to the main conductor 6 by brazing or the like. .

【The invention's effect】

According to the present invention, the horizontal space of the main conductor portion is reduced, so that the distribution board and the distribution board can be reduced in size, the screwing work of the branch conductor is eliminated, the number of assembling steps is reduced, and furthermore, the insulating cover is attached. As a result, the exposed portion of the charged portion on the front of the panel is eliminated, and safety is improved.

[Brief description of the drawings]

FIG. 1 is a front view of a distribution board showing an embodiment of the present invention, and FIG.
The figure is an enlarged perspective view of the main conductor and the branch conductor in FIG. 1,
FIG. 3 is an enlarged perspective view of the relay conductor in FIG. 1, FIG. 4 is a cross-sectional view showing a state where an insulating cover is put on the main conductor of FIG. 2, and FIG. FIG. 6 is a front view of a distribution board showing a conventional example. 4 Main circuit breaker, 5 Branch circuit breaker, 6 (6R
~ 6T) ... Main conductor, 7 (7R ~ 7T) ... Branch conductor, 10 ...
Insulation cover.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H02B 9/00

Claims (1)

(57) [Claims] 1. A three-phase main circuit breaker is connected to a plurality of branch circuit breakers arranged in a horizontal direction on the power supply side in two rows on the left and right sides with the power supply sides facing each other. In the connection conductor of the circuit breaker, one end is connected to each phase power supply side terminal of the main circuit breaker, and the other end is a three-phase vertical conductor overlapping the upper and lower sides of the central phase with the middle phase as the center, and A relay conductor consisting of a three-phase horizontal conductor connected orthogonally to the other end and having a left and right end connected to each phase power supply side terminal of the branch circuit breaker; and power supplies for the left and right two rows of the branch circuit breaker Two sets of three-phase main conductors each extending along the side and arranged in parallel with each other in the thickness direction, and three phases are derived in a horizontal direction at right angles from the lower side of each set of the main conductors by three phases. A branch conductor sequentially connected to each of the branch circuit breakers; A comb-shaped insulating cover in which the main conductors of the set are covered in three phases at a time and a partition wall is inserted between these main conductors; and the horizontal conductor of the relay conductor overlaps the branch conductor to form the main circuit. A connection conductor for a circuit breaker, which is connected to a power supply terminal of the branch circuit breaker closest to the circuit breaker.