JP6474277B2 - Branch bar set for 3-pole power distribution equipment - Google Patents

Description

  The present invention relates to a branch bar set of a three-pole power distribution device used for connecting a three-pole power distribution device such as a breaker to a bus bar.

In distribution boards that connect breakers to busbars via branch bars, connection holes are formed in the busbars at intervals that match the distance between terminals on the power supply side of the breaker. The front-end bus bar connecting portion is screwed, and the terminal mounting portion at the base end of the branch bar is screwed to the breaker terminal.
For this reason, as shown in Patent Document 1, the number of breakers to be connected is generally only one type in which the distance between terminals is equal to the pitch of the connection holes. Therefore, the width of the breaker is usually a constant width called a standard size.

  However, when the rated current of the breaker varies greatly depending on the application of the load at the connection destination, it is desirable to connect three-pole breakers having different widths to the same bus bar. If the width of the breaker is different, the distance between terminals is also different, so it cannot be connected to the same bus bar. Therefore, in Patent Document 2, a branch bar connecting member that can move on the bus bar is provided so that even if the distance between terminals is different from the standard three-pole breaker, it can be connected to the bus bar via the branch bar. Technology is disclosed.

  However, when such a branch bar connecting member is used, the number of parts of the distribution board is increased and the branch bar connecting member must be screwed to the bus bar. There is a problem that the workability of manufacturing the distribution board is lowered.

Japanese Utility Model Publication No. 6-88120 Japanese Utility Model Publication No. 6-80307

  Accordingly, an object of the present invention is to solve the above-mentioned conventional problems, and to branch a three-pole breaker capable of connecting three-pole breakers having different inter-terminal distances to the same bus bar without increasing the number of parts. Is to provide a bar set.

  The present invention made to solve the above problems is a branch bar set for connecting a three-pole power distribution device to three bus bars, and the left and right outer poles of the three-pole power distribution device are three poles. Two outer pole branch bars connected to the bus bar far from the power distribution device and the bus bar closer to the 3-pole power distribution device, and the center pole of the 3-pole power distribution device to the central bus bar The center pole branch bar includes one of the outer pole branch bar and the center pole branch bar. The bus bar connecting portion is positioned on a common first imaginary line drawn perpendicular to the bus bar. It is characterized by having a shape.

  The invention according to claim 2 is the invention according to claim 1, in which the bus bar connecting portion of the other branch bar for outer pole is drawn symmetrically with the first virtual line across the central pole of the three-pole power distribution device The shape is located on the second virtual line. Further, the invention according to claim 3 is the invention according to claim 2, in which both the outer pole branch bars are arranged such that the terminal mounting portions of the three-pole power distribution device are located closer to the outer sides of the first virtual line and the second virtual line. It is characterized by being made.

  If the branch bar set of the present invention is used, a connection hole is formed in a small three-pole power distribution device having a distance between terminals smaller than the pitch P with a pitch P that matches the distance between terminals of a standard power distribution device. It can be connected to a single bus bar, and a small three-pole power distribution device can be connected to a standard power distribution device on the same bus bar. Moreover, there is no need to increase the number of parts.

  According to the second aspect of the present invention, a common branch bar can be used even when a small three-pole power distribution device is opposed and connected to the bus bar. According to invention of Claim 3, the insulation distance between branch bars is fully securable.

It is explanatory drawing which shows the branch bar set of 1st Embodiment. It is a front view which shows the use condition of a branch bar set. It is a perspective view which shows the use condition of a branch bar set. It is an enlarged front view of the principal part. It is sectional drawing at the time of arrange | positioning a small 3 pole type breaker on the left side of a bus-bar and a standard 3 pole type breaker on the right side. It is sectional drawing at the time of arrange | positioning the small 3 pole type breaker on the left side of a bus-bar and the small 2 pole type breaker on the right side. It is a front view which shows the 2nd Embodiment of this invention. It is a perspective view which shows the 2nd Embodiment of this invention. It is sectional drawing which shows the 2nd Embodiment of this invention. It is a front view which shows the 3rd Embodiment of this invention. It is explanatory drawing which shows the branch bar set of 2nd Embodiment. It is explanatory drawing which shows the branch bar set of 3rd Embodiment.

Preferred embodiments of the present invention are shown below.
As shown in FIG. 1, the branch bar set of the present invention comprises three branch bars. Two outer pole branch bars 10 and 12 are shown on the left and right, and a center pole branch bar 11 is shown in the center. The outer pole branch bars 10 and 12 and the center pole branch bar 11 are used to connect the power supply side terminal of each pole of the three pole breaker which is a power distribution device and the three bus bars of the distribution board. It is used. Since the shape of these branch bars is determined according to the manner of attachment to the distribution board, the distribution board will be described first.

  2 and 3 are explanatory diagrams of a distribution board using the branch bar set of the present invention. In these drawings, reference numeral 1 denotes three bus bars. In this embodiment, as shown in FIG. 4, three poles R, S, and T are arranged in a triangular shape. The R and T poles are arranged in the lower stage, and the S pole is arranged in the upper stage. Connection holes 2 are formed in each bus bar 1 with a pitch P that matches the distance between terminals of a standard breaker. These connection holes 2 are screw holes in which female threads are cut so that each branch bar can be screwed.

  Distribution devices are connected to both sides of the bus bar 1. In this embodiment, the power distribution devices are all circuit breakers, but may be switches or terminal blocks. 3 is a standard 2-pole breaker, and 4 is a standard 3-pole breaker. These are all standard sizes, and the distance between the terminals is equal to the pitch P of the connection holes 2 of the bus bar 1. Reference numeral 5 denotes a small two-pole breaker. The width of the casing is half that of the standard two-pole breaker 3 and is connected on the same virtual straight line of the bus bar 1.

  As shown in FIG. 4, the small tripolar breaker 6 has three terminals, an outer pole 7, a center pole 8, and an outer pole 9, and each terminal is connected to three bus bars 1 (R, S, T). The outer pole branch bars 10 and 12 and the center pole branch bar 11 which constitute the branch bar set of the present invention are connected.

  First, one outer pole 7 of the small three-pole breaker 6 is connected to the bus bar 1 (T) farthest from the small three-pole breaker 6 by one outer pole branch bar 10. Let 13 be the busbar connection at the tip. The other outer pole 9 of the small three-pole breaker 6 is connected to the bus bar 1 (R) closest to the small three-pole breaker 6 by the other outer pole branch bar 12. The front-end busbar connection portion is set to 14. As shown in FIG. 4, a straight line extending perpendicularly to the bus bar 1 from the bus bar connecting portion 13 is defined as a first virtual line 15, and a straight line extending perpendicularly to the bus bar 1 from the bus bar connecting portion 14 is defined as a second line. The virtual line 16 is assumed. The central pole 8 of the small three-pole breaker 6 is positioned between the virtual lines 15 and 16, and the central pole 8 is provided on the central bus bar 1 (S) formed on any of the virtual lines described above. Further, the central electrode branch bar 11 is connected to the busbar connection portion 17. The distance from the center pole 8 to the first virtual line 15 is equal to the distance from the center pole 8 to the second virtual line 16, and the second virtual line 16 is the center pole 8 of the three-pole breaker 6. Because of being in a symmetrical position with respect to the first imaginary line 15 with the pin 3 interposed therebetween, a common branch bar set can be used even when the small three-pole breaker 6 is opposed to the bus bar 1 and connected.

  In the present invention, any one of the outer pole branch bars 10, 12 and the center pole branch bar 11 has a common first imaginary line 15 whose front-end bus bar connecting portion is perpendicular to the bus bar 1. Located in. In this embodiment, as shown in FIG. 4, one of the outer pole branch bar 10 and the center pole branch bar 11 has a first virtual connection in which the bus bar connecting portion 13 and the bus bar connecting portion 17 at the tip are common. The shape is located on the line 15. For this reason, as shown in FIG. 1, the center pole branch bar 11 is bent in the width direction in the middle, and the terminal connecting portion 20 at the base and the bus connecting portion 17 at the tip are shifted by a distance of P / 2. It is in.

  Further, as shown in FIG. 1, one of the outer pole branch bars 10 is also in a position where the terminal connection portion 19 at the base and the bus bar connection portion 13 at the tip are slightly displaced, and the other one of the outer pole branches. The bar 12 is also in a position where the terminal connection portion 21 at the base and the busbar connection portion 14 at the tip are slightly shifted. The bus bar connecting portion 13 of the outer pole branch bar 10 and the bus bar connecting portion 14 of the outer pole branch bar 12 are both shifted to the inside (center pole 8 side).

  As described above, the bus bar connecting portion 13 at the tip of one of the outer pole branch bars 10 is located on the first imaginary line 15, so that the terminal connecting portion 19 at the base thereof is the first imaginary line. It will be located slightly outside of 15. Similarly, the terminal connection portion 21 at the base of the other outer pole branch bar 11 is also located slightly outside the second virtual line 16. With such a structure, a sufficient insulation distance between the branch bars can be secured.

  As a matter of course, the center pole branch bar 11 is disposed between the first virtual line 15 and the second virtual line 16.

  As shown in FIGS. 3 and 5, in this embodiment, the terminals of the small three-pole breaker 6 are provided with the outer pole 7 and the outer pole 9 in the lower stage, and the central pole 8 in the upper stage. In this way, by approaching the height of the bus bar 1 corresponding to the terminal of each pole, the outer pole branch bars 10 and 12 and the center pole branch bar 11 can be formed short. Further, by providing a step between adjacent terminals, a sufficient insulation distance can be ensured even if the size is small. As shown in FIG. 5, the center pole branch bar 11 at the upper stage is substantially flat, but the branch bars 10 and 12 at the lower stage outer pole are bent downward from the middle. FIG. 6 is a cross-sectional view when a small three-pole breaker 6 is arranged on the left side of the bus bar 1 and a small two-pole breaker 5 is arranged on the right side.

  If the branch bar set of the present invention is used, the center pole branch bar 11 is connected to the bus bar 1 (S) on the virtual line 15, so the center pole branch bar 11 is the bus bar connecting portion of the outer pole branch bar 12. 14 is disengaged from the position of the connecting screw that is screwed onto the screw. For this reason, the screwing operation of the outer pole branch bar 12 is not hindered. The outer pole branch bar 10 is connected from the outside of the virtual line 15 to the bus bar 1 (T) farthest from the small three-pole breaker 6, so that the center pole branch bar 11 does not get in the way.

  As described above, when the branch bar set of the present invention is used, the standard type breakers 3 and 4 and the small three-pole type breaker 6 whose distance between terminals is smaller than P are matched with the distance between terminals of the standard type breaker. It can be connected to the three busbars 1 having connection holes formed at the pitch P via the outer pole branch bars 10 and 12 and the central pole branch bar 11, and the small three-pole breaker 6 and the standard type The breakers 3 and 4 can be connected to the same bus bar 1. Further, if the width of the case of the small three-pole breaker 6 is 2/3 of the width of the standard three-pole breaker 4, it can be arranged adjacent to each other, and the number of mounting can be increased. . The connection holes 2 do not need to be formed in series at the pitch P intervals in the bus bars 1 of each pole as in this embodiment, and the connection holes 2 are formed in any bus bar 1 at the pitch P intervals. If there is a place that is. In the above embodiment, the bus bar connecting portion 13 at the tip of the outer pole branch bar 10 and the bus bar connecting portion 17 of the central pole branch bar 11 are positioned on the common first virtual line 15. It is also possible to position the bus bar connecting portion 14 at the tip of the outer pole branch bar 12 and the bus bar connecting portion 17 of the central pole branch bar 11 on the common first virtual line 15.

  In the first embodiment described above, the three bus bars 1 are arranged in a triangle. However, it is also possible to arrange the three bus bars 1 on the same plane as in the second embodiment shown in FIG. In the second embodiment, as shown in FIGS. 7 and 11, the bus bar connecting portion 17 of the center pole branch bar 11 is perpendicular to the bus bar 1 from the bus bar connecting portion 14 of the outer pole branch bar 12. The shape is located on the extending second virtual line 16. The outer pole branch bar 10 is formed in a crank shape so as not to pass over the bus bar connecting portion 17 of the center pole branch bar 11. Further, the bus bar connecting portion 17 of the central pole branch bar 11 may have a shape positioned on the first virtual line 15 extending perpendicularly to the bus bar 1 from the bus bar connecting portion 13 of the outer pole branch bar 10. .

  In the third embodiment shown in FIGS. 10 and 12, the small tripolar breakers 6 on both sides of the bus bar 1 are arranged to face each other, and both are shared by the outer pole branch bars 22 and 23 and the central pole branch. The bus 24 is connected to the bus bar 1. The bus bar connection portion 25 of the outer pole branch bar 22 is formed between the terminal connection portions 27 formed at both ends of the outer pole branch bar 22. Similarly, the bus bar connecting portion 26 of the center pole branch bar 24 is formed at substantially the center between the terminal connection portions 28 formed at both ends of the center pole branch bar 24. The outer pole branch bar 23 has the same shape as the outer pole branch bar 22 and can be used by reversing the outer pole branch bar 22 by 180 degrees, so that it can be manufactured at low cost.

  As described above, when the branch bar set of the present invention is used, a standard breaker and a small three-pole breaker having a terminal-to-terminal distance smaller than P can be connected to the same bus bar without increasing the number of parts. 1 can be connected.

1 Busbar 2 Connection Hole 3 Standard 2 Pole Breaker 4 Standard 3 Pole Breaker 5 Small 2 Pole Breaker 6 Small 3 Pole Breaker 7 Outer Pole 8 Center Pole 9 Outer Pole 10 Branch Pole for Outer Pole 11 Branch for Central Pole Bar 12 Branching bar for outer pole 13 Busbar connection section 14 Busbar connection section 15 First virtual line 16 Second virtual line 17 Busbar connection section 19 Terminal connection section 20 Terminal connection section 21 Terminal connection section 22 Branch bar 23 for outer pole Branch pole for outer pole 24 Branch bar for central pole 25 Bus connection section 26 Bus connection section 27 Terminal connection section 28 Terminal connection section

Claims (3)

A branch bar set for connecting a three-pole power distribution device to three bus bars,
Two outer pole branch bars that connect the left and right outer poles of the three-pole power distribution device to the bus bar far from the three-pole power distribution device and the bus bar near the three-pole power distribution device, and the three-pole type It consists of a central pole branch bar that connects the central pole of the power distribution equipment to the central bus bar,
Any one of the outer pole branch bar and the center pole branch bar has a shape in which the bus bar connecting portion is located on a common first virtual line drawn perpendicularly to the bus bar. Branch bar set for polar power distribution equipment.   The other outer pole branch bar has a shape in which the busbar connecting portion is located on the second imaginary line drawn symmetrically with the first imaginary line across the central pole of the three-pole power distribution device. The branch bar set for a three-pole power distribution device according to claim 1,   3. The branch bars for both outer poles are characterized in that the terminal attachment portions of the three-pole power distribution device are arranged on the outer sides of the first virtual line and the second virtual line. Branch bar set for 3-pole power distribution equipment.

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