JP6584612B2 - Distribution board - Google Patents

Description

  The present invention relates to a distribution board in which circuit breakers having three poles having different widths are incorporated in the same bus. In this specification, the upper and lower sides are expressed with the distribution board placed horizontally. However, when the distribution board is installed on the wall, the lower side is the rear side of the distribution board and the upper side is the front side (door side). It becomes.

  The distribution board incorporates a breaker for wiring called a main breaker and a breaker for wiring called a branch breaker inside its casing, and is a three-pole connected to the secondary terminal of the main breaker. A number of branch breakers are connected to the bus bar. Each of these wiring circuit breakers is fixed to a device mounting plate at the bottom of the distribution board casing, and the upper surface of the wiring circuit breaker is covered with a shield plate for preventing electric shock. Since the primary side terminal and secondary side terminal of each circuit breaker are exposed live parts, the terminal height is set so that an appropriate insulation distance can be secured from the above-mentioned equipment mounting plate, shield plate, and each bus bar. Is set.

  There are two-pole and three-pole circuit breakers used as branch breakers. As shown in Patent Document 1, a conventional three-pole circuit breaker for wiring is generally a three-pole terminal having the same height. Recently, however, in order to meet the demand to reduce the size of the distribution board case, a three-pole circuit breaker with a narrower width than before has been studied. Thus, if the lateral width of the circuit breaker is shortened, the distance between the terminals approaches, so that it is difficult to secure the insulation distance between the terminals if the three pole terminals are kept at the same height.

  Therefore, as shown in FIG. 4 of Patent Document 2, it has been studied to secure an insulation distance by providing a difference in height between adjacent terminal heights. However, this only considers the insulation distance between the three-pole terminals, and the distribution of power when two types of three-pole circuit breakers with different widths are mixed in the same distribution board housing. It does not consider the insulation distance of the entire panel. Thus, when two kinds of three-pole circuit breakers with different widths are mixed inside the distribution board casing, the standard of how to determine the terminal heights is as follows: It was not known so far.

JP 2007-288963 A JP 2000-294108 A

  Accordingly, an object of the present invention is to solve the above-mentioned conventional problems, and to provide a distribution board in which two types of three-pole circuit breakers having different widths are incorporated in the same bus bar while ensuring a necessary insulation distance. Is to provide.

  The distribution board of the present invention made to solve the above problems is a distribution board in which two types of three-pole circuit breakers having different widths are incorporated in the same bus, and the first wiring The circuit breaker has three poles with the same terminal height, and the second circuit breaker with a narrower width than this has a different adjacent terminal height and the height of its upper terminal. Is higher than the terminal height of the first circuit breaker, the height of the lower terminal is lower than the terminal height of the first circuit breaker, and the outer terminal of the second circuit breaker is The height is different from the terminal height of the first circuit breaker.

  In addition, as described in claim 2, the ends of the branch bar connecting the two outer pole terminals of the second circuit breaker to the bus bar are displaced in the longitudinal direction of the bus bar, thereby providing two outer pole terminals. It can be set as the structure connected to the bus-bar at the position nearer to the center pole than the position.

  Furthermore, as described in claim 3, it is preferable to form a crank-shaped step portion in the partition wall between adjacent terminals of the second circuit breaker.

  In the present invention, the second wiring circuit breaker having a narrower width than the standard size first wiring circuit breaker changes its adjacent terminal height, and the height of its upper terminal is set to the standard size first circuit breaker. The height of the lower terminal is made lower than the height of the first wiring breaker, and the height of the outer terminal of the second wiring breaker is made higher than the height of the terminal of the wiring breaker. The terminal height of the first circuit breaker was made different. As a result, the insulation distance can be appropriately ensured even when two types of three-pole circuit breakers having different widths are incorporated in the bus bar. The reason will be described later.

  According to the invention of claim 2, two types of three-pole circuit breakers having different widths can be connected to the standard-sized bus bar by the branch bar. According to the invention of claim 3, even when the terminal interval wall is thin, the engaging portion of the terminal cover can be secured.

It is a perspective view of an embodiment. It is explanatory drawing of the terminal height of each circuit breaker. It is explanatory drawing of the terminal height of each circuit breaker. It is explanatory drawing which shows the modification of the terminal height of the 2nd circuit breaker for wiring. It is explanatory drawing which shows the modification of the terminal height of the 2nd circuit breaker for wiring. It is explanatory drawing which shows the modification of the terminal height of the 2nd circuit breaker for wiring. It is explanatory drawing which shows the modification of the terminal height of the 2nd circuit breaker for wiring. It is a perspective view of a terminal space | interval wall. It is a top view of a terminal space | interval wall. It is a top view which shows the connection state to a bus-bar. It is a perspective view which shows the connection state to a bus-bar. It is a top view which shows three types of branch bars. It is explanatory drawing which shows the connection state to a bus-bar. It is explanatory drawing of a dimension relationship.

Embodiments of the present invention will be described below.
As shown in FIG. 1, the distribution board of the present invention incorporates two types of three-pole circuit breakers with different widths on the same bus. Reference numeral 1 denotes a standard-size first circuit breaker, and 2 denotes a second wiring breaker having a narrower width. In this embodiment, a standard size two-pole circuit breaker 3 is also incorporated.

  As shown in FIGS. 1 to 3, the standard-size first circuit breaker 1 has the same terminal height for the three-pole terminals 1 a, 1 b, and 1 c. Here, the terminal height refers to the height from the device mounting plate 4. The terminal 1a and the terminal 1c are terminals of the outer pole of the three poles, and the terminal 1b is a terminal of the center pole.

  The first circuit breaker 1 in the present embodiment is a conventional standard product, and is provided with three terminals 1a, 1b, and 1c at intervals of 25 mm in a 75 mm wide casing, and can be used as a main breaker of 50A or more. Has a rating. A terminal part is a comparatively large thing according to the electric wire and crimp terminal which are connected. The second circuit breaker 2 according to this embodiment includes three terminals 2a, 2b, and 2c in a casing having a width of 50 mm narrower than that of a standard product, and has a rating of 50A or more. Since the both circuit breakers 1 and 2 have the same rating, the sizes of the terminals 2a, 2b, and 2c are the same as those of the terminals 1a, 1b, and 1c. Further, the third power distribution breaker 3 in the present embodiment is a conventional standard product. Two terminals 3a and 3b are protruded from a 25 mm wide casing, and a part of the upper terminal protrudes above the lower terminal. It is provided up and down.

  As shown in FIGS. 2 and 3, the second circuit breaker 2 has an insulation distance between terminals by changing the terminal height of the adjacent terminals 2 a, 2 b, 2 c and making the lateral width narrower than the standard size. Is secured. In the present invention, the terminal height of the terminal 2b which is the upper terminal is made higher than the terminal height of the terminals 1a, 1b and 1c of the first size circuit breaker 1, and the terminal 2a which is the lower terminal. The terminal height of 2c is made lower than the terminal heights of the terminals 1a, 1b and 1c of the first circuit breaker.

  The terminal heights of the three-pole terminals 1a, 1b, and 1c of the standard-size first circuit breaker 1 are optimal with sufficient insulation distance from the device mounting plate 4 and the shield plate 5 shown in FIG. Is set to the height of However, the terminal heights of the terminals 3a and 3b of the standard size two-pole circuit breaker 3 that have been used in the past are set to be higher or lower than the terminal heights of the terminals 1a, 1b, and 1c. Insulation distances that do not impede practically are secured between the device mounting plate 4 and the terminal 3b and between the shield plate 5 and the terminal 3a.

  Therefore, in the present invention, the height of the terminal 2b, which is the upper terminal of the second circuit breaker 2, is higher than the height of the terminals 1a, 1b, 1c of the standard first circuit breaker 1 and is standard. The size of the terminals 2a and 2c, which are the lower terminals of the second circuit breaker 2, is set lower than the terminal 3a which is the upper terminal of the two-pole circuit breaker 3 having the size. It was set lower than the height of the terminals 1a, 1b and 1c of the circuit breaker 1 for wiring, and higher than the terminal 3b which is the lower terminal of the circuit breaker 3 for two-pole wiring of standard size. If the terminal height is set in this way, a necessary insulation distance is secured between the terminals 2a, 2b, and 2c of the second circuit breaker 2 and between the device mounting plate 4 and the shield plate 5. A sufficient insulation distance can be secured.

  Therefore, as in the present embodiment, in the distribution board in which the two-pole circuit breaker 3 is further incorporated in the same bus, the height of one terminal 3a of the two-pole circuit breaker 3 is the second wiring. The height of the terminal 2b, which is the upper terminal of the circuit breaker 2, is higher than that of the terminal 2b, and the height of the other terminal 3b is lower than that of the lower terminals 2a, 2c of the second circuit breaker 2.

  Further, in the present invention, as shown in FIGS. 2 and 3, the height of the outer terminals 2a and 2c of the second circuit breaker 2 is set to the height of the terminals 1a, 1b and 1c of the first circuit breaker. Different in height. Thereby, also when the 1st circuit breaker 1 and the 2nd circuit breaker 2 are arrange | positioned adjacently, an insulation distance is securable.

  In the present invention, the height of the terminal 2b, which is the upper terminal of the second circuit breaker, may be the same as the terminal height of the terminals 1a, 1b, and 1c of the standard size first circuit breaker 1. It's not impossible. However, in that case, the lower terminals 2a and 2c have to be made considerably low in order to ensure an insulation distance between the terminals, and it becomes difficult to ensure an insulation distance from the device mounting plate 4. Similarly, the heights of the terminals 2a and 2c, which are lower terminals of the second circuit breaker, may be the same as the terminal heights of the terminals 1a, 1b and 1c of the standard size first circuit breaker 1. Although it is not impossible, in that case, the upper terminal 2b must be made considerably high in order to secure an insulation distance between the terminals, and it is difficult to secure an insulation distance from the shield plate 5, which is not preferable.

  In this embodiment, the terminals 2a, 2b, 2c of the second circuit breaker 2 are arranged in an isosceles triangle shape as shown in FIG. In this case, it is preferable from the viewpoint of safety to dispose a neutral electrode that can become an N phase when connected to a single-phase three-wire circuit. However, as shown in FIG. 5, it can also be an inverted isosceles triangle with the central pole 2b as the lower pole. In these cases, the height of the outer electrode, which is a voltage electrode, becomes equal, so that the connection to the bus bar is facilitated. Also in these embodiments, the heights of the outer terminals 2a, 2c on the left and right sides of the second wiring breaker 2 are different from the heights of the terminals 1a, 1b, 1c of the first wiring breaker. .

  In addition, as shown in FIG. 6, it can also be set as the step shape that each terminal height of the terminals 2a, 2b, 2c of the 2nd circuit breaker 2 differs. Further, as shown in FIG. 7, it is also possible to make the arrangement such that all three terminal heights are different and the central pole 2a is the upper terminal. Also in this case, it is preferable that the central pole 2a is a neutral pole (N pole). 6 and 7, the terminal heights of the terminals 2a, 2b, and 2c of the second circuit breaker 2 are all different from each other, and have an upper terminal, a lower terminal, and an intermediate terminal. .

  As described above, in the present invention, a relatively large terminal having a rating of 50 A or more is placed inside the casing of the second circuit breaker 2 having a width smaller than the standard size, so that the insulation distance between the terminals can be reduced. Securing is severe. Therefore, in this embodiment, as shown in FIG. 8 and FIG. 9, the slit 7 formed of a crank-shaped recess is formed at the corner portion of the terminal interval wall 6 to increase the creeping insulation distance between adjacent terminals.

  Since the terminal spacing wall 8 of the standard size first circuit breaker 1 has a sufficient thickness, a slit is formed in the center of the terminal spacing wall 8 to insert the terminal cover. However, the terminal interval wall 6 of the second circuit breaker 2 is formed thinner than the conventional one, and there is no room for forming a slit at the center. However, if the slit 7 which consists of a crank-shaped recessed part is formed in the corner part of the terminal space | interval wall 6, the engaging part of a terminal cover is securable. That is, the lower part of the plate-like terminal cover can be dropped into the slit 7 and held. The upper portion of the terminal cover may be fixed by an appropriate means such as elastic fixing or screw fixing at a location not shown.

  Next, a means for connecting to the bus bar will be described with reference to FIG. 10 and subsequent drawings. As shown in FIGS. 10 and 11, the bus bar 10 is formed with mounting holes 11 at a constant pitch corresponding to the terminal interval of the standard size circuit breaker 1, and the standard size first wiring blocker is formed. The container 1 is connected to the bus bar 10 by screwing the ends of the branch bars 12a, 12b, 12c extending linearly in a plan view. In addition, for the standard size two-pole circuit breaker 3, the mounting holes 11 with a constant pitch of the bus bar 10 are positioned at the center in the width direction of the housing, so that the branch bars 13 a and 13 b are the upper terminals. The bus bar connecting portion at the tip is displaced toward the center from 3a and the lower terminal 3b.

  However, for the terminals 2a, 2b, and 2c of the second circuit breaker 2, the distance between the terminals when viewed in plan is narrower than the distance between the terminals of the standard size circuit breakers 1 and 3; It is not possible to use only branch bars that extend in a straight line. Therefore, in this embodiment, three types of branch bars 14a, 14b, and 14c shown in FIG. 12 are used.

  The branch bar 14a is for connecting the terminal 2a of one outer pole of the second circuit breaker 2 to the bus bar 10a far from the circuit breaker 2, and the bus bar connecting portion 16a at the tip thereof. Is displaced closer to the center pole than the terminal connecting portion 15a at the base. The branch bar 14c is for connecting the terminal 2c of the other outer pole of the second circuit breaker 2 to the bus bar 10c on the side close to the circuit breaker 2, and the bus bar connecting portion 16c at the tip thereof. Is displaced closer to the center pole than the terminal connecting portion 15c at the base. Further, the branch bar 14b is for connecting the central pole terminal 2b of the second circuit breaker 2 to the central bus bar 10b, and the bus bar connecting portion 16b at the tip thereof is connected to the terminal connecting portion 15b of the base. It is displaced more than. Refer to FIG. 14 for each displacement width.

  FIG. 13 is a top view showing a state in which the terminals 2a, 2b and 2c of the second circuit breaker 2 are connected to the bus bars 10a, 10b and 10c by these three types of branch bars 14a, 14b and 14c. . As shown in the figure, the connecting portion 16a of the branch bar 14a to the far-side bus bar 10a and the connecting portion 16b of the branch bar 14b to the central bus bar 10b are the same straight line shown as a straight line L1 in FIG. On the line. That is, the mounting hole 11 is formed on the straight line L1.

  Further, what is indicated as L2 in FIG. 13 is a straight line passing through the connecting portion of the branch bar 14b to the bus bar 10c on the near side. These straight lines L1 and L2 are both perpendicular to the bus bar, and the distance between the straight lines L1 and L2 is the same as the distance between the mounting holes 11. Thus, in this embodiment, the tips of the branch bars 14a and 14c connecting the two outer poles 2a and 2c of the second circuit breaker 2 to the bus bars 10a and 10c are displaced in the longitudinal direction of the bus bar, It is connected to the bus bar at a position closer to the center pole than the terminal positions of the two outer poles 2a and 2c. Accordingly, the center pole 2b of the second circuit breaker 2 is naturally located between the straight lines L1 and L2.

  If such three types of branch bars 14a, 14b, and 14c are used, the terminals of the second circuit breaker 2 having a width smaller than the standard size with respect to the mounting holes 11 formed in the bus bar at a standard pitch. 2a, 2b and 2c can be connected.

  FIG. 14 shows the dimensional relationship when the width of the first circuit breaker 1 is 75 mm, the width of the second circuit breaker 2 is 50 mm, and the pitch of the mounting holes is 25 mm. However, these dimensions can be changed as appropriate and are not limited thereto. The branch bar 14b is bent in the direction of the other outer pole so as to be away from the bus bar connecting portion 16c connected to the one outer pole.

  As described above, according to the present invention, two types of three-pole circuit breakers 1 and 2 having different lateral widths can be incorporated in the same bus bar while ensuring an insulation distance.

1 First circuit breaker for wiring (3 poles)
2 Second circuit breaker (3 poles)
3 Circuit breaker (2 poles)
4 Device mounting plate 5 Shield plate 6 Terminal spacing wall 7 Slit 8 Terminal spacing wall 10 Bus bar 11 Mounting hole 12 Branch bar 13 Branch bar 14 Branch bar 15 Terminal connection portion 16 Bus bar connection portion

Claims (3)

  A distribution board incorporating two types of circuit breakers with three different widths on the same bus, wherein the first circuit breaker has the same terminal height of the three poles, The second wiring circuit breaker having a narrower width than this is obtained by changing the height of the adjacent terminal, the height of the upper terminal is made higher than the terminal height of the first circuit breaker, and the lower part thereof The height of the terminal is made lower than the terminal height of the first circuit breaker, and the height of the outer terminal of the second circuit breaker is made different from the terminal height of the first circuit breaker. A distribution board characterized by being formed.   Displace the tip of the branch bar connecting the terminals of the two outer poles of the second circuit breaker to the bus bar in the longitudinal direction of the bus bar at a position closer to the center pole than the terminal positions of the two outer poles. The distribution board according to claim 1, wherein the distribution board is connected to a bus bar.   The distribution board according to claim 1 or 2, wherein a crank-shaped step portion is formed in a partition wall between adjacent terminals of the second circuit breaker.

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