JP2016208710A - Power distribution board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power distribution board capable of measuring current flowing in a plurality of branch switches and capable of incorporating a current measurement unit without increasing the board's size even when the unit's size is large-sized.SOLUTION: A power distribution board comprises: a plurality of branch switches 4 connected to a plurality of bus bars 3; and a current measurement unit 15 including a plurality of current sensors 16. A bus bar 3 comprises a plurality of branch bars 8 extending to branch switches 4. The current measurement unit 15 comprises a plurality of passing holes 19 formed so that respective branch bars 8 pass through current sensors 16, and measures current by making the branch bars 8 pass through. Forming an insertion hole 26 for the current measurement unit 15 on a bus bar 3 adjacent to a bus bar 3 on which current measurement is performed and inserting part of the current measurement unit 15 into the insertion hole 26 reduce installation space.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a distribution board provided with means for measuring current flowing in a plurality of branch switches housed in the board.

  With the spread of home energy management systems (HEMS) and the like, there is an increasing demand for measuring the current flowing through a load via each branch switch of a domestic distribution board. For this reason, as shown in Patent Document 1, a current transformer, which is a current sensor, is arranged on the load side of each branch switch housed in a distribution board, and current is measured.

  However, in the structure shown in Patent Document 1, a current sensor is arranged in each branch switch to perform wiring work, and a sensor unit that generates detection data based on the detection output of each current sensor is connected to each current sensor. Connection work is required. For this reason, there is a problem that wiring work is very complicated and time-consuming.

  Patent Document 2 discloses a technique for detecting a current of a plurality of terminal portions by forming a plurality of current sensors in one current sensor block and passing a wiring to a terminal block through each current sensor. With the structure of Patent Document 2, wiring work is not complicated as in Patent Document 1.

  However, in Patent Document 2, a plurality of current sensors and sensor units are formed on the same printed circuit board, and each sensor unit is connected to a measurement control unit that collects detection data of each sensor unit and outputs it as detection information. In order to incorporate a current measurement unit equipped with such a large printed circuit board into the distribution board, the distribution board is required. There was a problem of increasing the size. In addition, when the current sensor block is arranged on the primary side of the branch switch in order to simplify the wiring work, there is still a problem that the distribution board becomes large in order to secure the arrangement space. .

JP-A-6-165320 JP-A-8-240619

  Therefore, the object of the present invention is to solve the above-mentioned conventional problems, and it is possible to measure the current flowing through a plurality of branch switches, but no complicated wiring work is required, and the current measuring unit is enlarged. Even in such a case, it is to provide a distribution board that can be incorporated without increasing the size of the distribution board.

  The present invention made to solve the above problems is a distribution board comprising a plurality of branch switches connected to a plurality of bus bars, and a current measurement unit having a plurality of current sensors, At least one bus bar includes a plurality of branch bars extending toward the branch switch, and the current measuring unit includes a plurality of passage holes formed so that each branch bar passes through the current sensor. Current is measured by passing the branch bar through the passage hole, and an insertion hole for the current measurement unit is formed in the bus bar adjacent to the bus bar where current measurement is performed, and a part of the current measurement unit is inserted into this insertion hole. It is characterized by that.

  According to a second aspect of the present invention, in the first aspect of the invention, the plurality of branch switches are fixed to the branch switch fixing plate, and an insertion hole for the current measurement unit is formed in the branch switch fixing plate, and the current measurement unit Is partially inserted into the insertion hole.

  The invention of claim 3 is the invention of claim 2, wherein the branch switch and the current measuring unit are arranged on both sides of the bus bar, and the current measuring unit on one side is inserted into the insertion hole of the bus bar, The current measurement unit on the side is inserted into the insertion hole of the branch switch fixing plate.

  According to a fourth aspect of the present invention, in the first to third aspects of the present invention, the current measurement unit includes a current measurement board having a plurality of current sensors housed in a unit case, and the current measurement board is a current measurement of the current sensor. A projecting part for arranging an arithmetic processing part for performing a value arithmetic process is formed, and a housing part for the projecting part of the current measuring unit is inserted into the insertion hole of the bus bar or the branch switch mounting plate It is.

  The invention of claim 5 is characterized in that, in the invention of claim 3, both current measurement units are arranged adjacent to each other.

  The invention of claim 6 is a distribution board comprising a plurality of branch switches connected to a plurality of bus bars and a current measuring unit having a plurality of current sensors, wherein at least one bus bar is branched. The current measuring unit includes a plurality of passage holes formed so that each branch bar passes through the current sensor, and the branch bars are provided in the passage holes. A plurality of branch switches are fixed to the branch switch fixing plate, an insertion hole for the current measurement unit is formed in the branch switch fixing plate, and a part of the current measurement unit is It is characterized by being inserted into the insertion hole.

  According to the present invention, since the current value of each branch bar is measured using a current measurement unit having a plurality of current sensors, the current flowing through the plurality of branch switches can be measured, and complicated wiring work is unnecessary. It is. In addition, the insertion hole of the current measurement unit is formed in the bus bar and branch switch fixing plate, and a part of the current measurement unit is inserted into this insertion hole. Installation space can be secured. Therefore, even when the current measuring unit is enlarged, the distribution board can be mounted without increasing the size.

  As in the invention of claim 4, it is possible to suppress the width in the longitudinal direction of the current measuring unit by inserting the protruding portion for arranging the arithmetic processing unit of the current measuring unit into the insertion hole. The longitudinal direction can also be formed narrow. Further, if both current measurement units are arranged adjacent to each other as in the invention of claim 5, the distribution board can be formed narrow.

It is a perspective view shown in the state where a cover of a distribution board was omitted. It is a perspective view which shows the internal machine of a distribution board. It is the perspective view which abbreviate | omitted the branch switch. It is the perspective view which abbreviate | omitted the current measurement unit. It is a disassembled perspective view which shows the internal machine of a distribution board. It is sectional drawing which shows the internal machine of a distribution board. It is a bottom perspective view showing an internal unit of a distribution board. It is a perspective view of an electric current measurement unit. It is a perspective view of an electric current measurement board | substrate. It is a back surface perspective view of an electric current measurement board | substrate.

Embodiments of the present invention will be described below.
FIG. 1 is a perspective view illustrating the distribution board according to the embodiment with a cover omitted. In this figure, 1 is a distribution board case, 2 is a main switch, 3 is a bus bar connected to the secondary side of the main switch 2, and 4 is a branch arranged in two rows on both sides of the bus bar 3. A switch 5 is a branch switch fixing plate. Details of each part will be described below.

  As shown in FIGS. 2, 3, and 4, the bus bar 3 is formed by laminating a plurality of bus bars 3, and includes two voltage electrodes L <b> 1 and L <b> 2 and one neutral electrode N. In the present embodiment, the N pole is arranged at the uppermost stage for safety, but it is not limited to this. Each bus bar 3 is held at equal intervals by a bar holder 6 and a spacer 7 shown in FIG.

  As shown in FIGS. 4 and 5, a plurality of branch bars 8 extending toward the branch switch 4 are projected in a comb shape on one side surface of the bus bar 3 of the voltage poles L <b> 1 and L <b> 2. . In the voltage poles L1 and L2, the protruding direction of the branch bar 8 is reversed. As shown in FIG. 6, the primary terminals of the branch switches 4 in one row are plug-in connected to the ends of these branch bars 8. The width of the uppermost N-pole bus bar 3 is sized to cover the branch bars 8 of the voltage poles L1 and L2. The branch bar 8 is formed on one side surface of the end portion of the bus bar 3, but the branch bar 8 may be protruded from both side surfaces of the bus bar 3.

  As shown in FIG. 5, the side surface of the voltage poles L1 and L2 opposite to the branch bar 8 of the bus bar 3 is a straight plane connecting portion 9, and the other row as shown in FIG. The primary side terminal of the branch switch 4 is plug-in connected. A main lead bar connecting portion 10 is formed at the end of the bus bar 3 on the main switch 2 side, and is connected to the main switch 2 by the main lead bar. A functional device connection portion 11 is formed at the other end of the bus bar 3, and functional devices such as a current measuring device 22 described later are connected thereto. The functional device connection portion 11 is formed wider than the branch bar 8.

  In this embodiment, the branch bar 8 is formed in the same plane as the bus bar 3, but is not necessarily in the same plane. In this embodiment, the branch bar 8 is formed integrally with the bus bar 3. However, the branch bar 8 formed separately may be fixed to the bus bar 3 with a screw.

Here, the branch switch 4 is a plug-in type as shown in FIG. 6, and a recess 30 is formed at a corresponding position of the three bus bars 3 on the primary terminal side of the branch switch 4, A plug terminal 30 a serving as a primary terminal is formed inside the recess 30, and the plug terminal 30 a is connected to the branch bar 8. Further, the recess 30 that does not form the plug terminal 30 a is inserted into the plane connection portion 9 of the bus bar 3.

  Each branch switch 4 is fixed to a branch switch fixing plate 5. A plurality of slits 12 as shown in FIG. 3 are formed on the branch switch fixing plate 5, and a protrusion that engages with the slits 12 is formed on the bottom surface of the branch switch 4. As is well known, the branch switch 4 is fixed to the branch switch fixing plate 5 by sliding the protrusion 12 into the slit 12 and then sliding in the direction of the bus bar 3, and the primary terminal of the branch switch 4. The tip of the branch bar 8 is inserted into

  As shown in FIG. 4, the central portion of the branch switch fixing plate 5 is a recess 13 so as to ensure an insulation distance from the bus bar 3, and a bar that supports the end of the bus bar 3 in the recess 13. A support base 14 is attached.

  A current measurement unit 15 is attached to the primary side of the branch switch 4. As shown in FIGS. 8 to 10, the current measurement unit 15 includes a plurality of current sensors 16. These current sensors 16 are attached to one current detection board 17 and are housed in an insulating unit case 18. In the present embodiment, the current sensor 16 is a CT, but is not limited to this. The current measuring unit 15 includes a through hole portion 19 penetrating each current sensor 16, and measures the current flowing through the branch bar 8 through the branch bar 8 through these through hole portions 19. The shape of the passage hole 19 is not limited to the embodiment, and the passage hole 19 may be a notch depending on the type of the current sensor 16 and can be inserted from above the branch bar 8.

  As shown in FIG. 8, an opening 20 is formed at the end of the current measurement unit 15 so that a communication line can be output.

  As shown in FIG. 10, an arithmetic processing unit 21 is mounted on the current detection board 17. The arithmetic processing unit 21 has an arithmetic processing function for analog-to-digital conversion of the current measurement value of the current sensor 16 and calculating electric power from the current value, and the current measurement device 22 shown in FIG. The function to transmit to. The current measuring device 22 displays a usage status of each current sensor 16, an alarm notification due to excessive use of current, or transmission of the current value of the current sensor 16 outside the panel. In this embodiment, the current measuring device 22 is arranged in the case 1 of the distribution board, but can also be installed outside the board. The current detection board 17 includes a partial protrusion 23 at the upper end, and the arithmetic processing unit 21 is disposed on the protrusion 23 as shown in FIG. For this reason, the upper surface of the current measurement unit 15 which becomes a storage part of the protrusion part 23 protrudes partially as shown in FIG. By forming the protruding portion 23, the width in the longitudinal direction of the current measuring unit 15 can be suppressed, and further, the longitudinal direction of the distribution board can also be formed narrow.

  As shown in FIG. 2, the current measuring device 22 is connected to each current sensor 16 and the arithmetic processing unit 21 via the communication line 24 to measure a current value and turn the current sensor 16 on and off. The current measuring device 22 may have a display function of a measured value or a function of communicating with an external display device.

  As shown in FIGS. 4 and 5, an insertion hole 25 for the current measurement unit 15 is formed in the topmost N-pole bus bar 3, and as shown in FIGS. 2 and 3, the current measurement unit 15 Is inserted into the insertion hole 25. As shown in FIG. 5, the current measurement unit 15 measures the current value of the central voltage pole L1, and the insertion hole 25 of the current measurement unit 15 is formed in the bus bar 3 adjacent to the bus bar 3 where current measurement is performed. Is formed.

  Since a part of the current measurement unit 15 is inserted into the plurality of insertion holes 25 of the bus bar 3 in this way, the current measurement unit can be obtained without increasing the size of the distribution board even when the current measurement unit 15 is enlarged. 15 can be stored. The outside of the current measuring unit 15 is covered with an insulating unit case 18 to ensure insulation from the bus bar 3 serving as a charging unit. In the present embodiment, the storage portion corresponding to the protruding portion 23 of the current measuring unit 15 is inserted into the insertion hole 25. In the case where the current detection substrate 17 is formed in a flat shape instead of an uneven shape, the insertion hole 25 of the bus bar 3 may be formed in a single long hole shape, and the current measurement unit 15 may be inserted into the insertion hole 25. As in this embodiment, the insertion hole 25 is formed in a plurality, the current measuring unit 15 is made uneven, and the opening area of the insertion hole 25 is reduced, so that the reduction of the heat radiation area of the bus bar 3 is suppressed. Prevents the enlargement of the electrical panel.

  In this embodiment, the current value of the voltage electrode L1 is measured, and the insertion hole 25 of the current measurement unit 15 is formed in the adjacent N-pole bus bar 3, but the insertion hole 25 is formed in the other adjacent voltage electrode L2. It is also possible. However, if the insertion hole 25 is formed in the voltage electrode, the current capacity is reduced. Therefore, the insertion hole 25 is preferably formed in the N pole. In this embodiment, a part of the current measuring unit 15 is inserted so as to penetrate the insertion hole 25, but may be inserted so as to be flush with the upper surface of the bus bar 3.

  As shown in FIG. 4, the insertion hole 26 of the current measurement unit similar to the insertion hole 25 is also formed in the recess 13 of the branch switch fixing plate 5 described above. As shown in FIGS. 6 and 7, a part of the current measurement unit 27 that measures the current of the voltage electrode L <b> 2 is inserted into the insertion hole 26. The current measurement unit 27 that measures the current of the voltage electrode L2 is inverted from the current measurement unit 15. By adopting such a structure, even when the current measuring unit 27 is enlarged, the current measuring unit 27 can be accommodated without increasing the size of the distribution board.

  In the present embodiment, the current detection board 17 includes a partial protrusion 23 only at the upper end, and the current measurement unit 15 is inserted into either the bus bar 3 or the branch switch fixing plate 5. As described above, the protrusions 23 may be formed on both the upper and lower ends of the current detection substrate 17. In that case, the current measuring unit 15 is similarly formed at the upper and lower ends of the storage portion corresponding to the protruding portion 23, and the insertion hole 25 of the storage portion of the current measurement unit 15 is formed in a plurality of bus bars 3 or branch switch fixing plates 5. Is provided. Specifically, when measuring the current value of the voltage pole L1, the insertion holes 25 are provided in the adjacent N-pole bus bar 3 and the L2-pole bus bar 3, and the current measurement unit 15 is inserted into each insertion hole 25. When the current value of the voltage pole L2 is measured, the insertion switch 25 is provided in the branch switch fixing plate 5 and the bus bar 3 of the L1 pole, and the current measurement unit 15 is inserted into each insertion hole 25. is there.

  In the embodiment described above, the insertion hole 25 of the current measurement unit 15 is formed in the N pole bus bar 3, and the insertion hole 26 of the current measurement unit 27 is also formed in the branch switch fixing plate 5. As a result, as shown in FIG. 6, the current measuring units can be arranged in different stages. Since the bar holders 6 of the bus bar 3 are arranged at both ends of the bus bar 3, the current measuring unit 15 and the current measuring unit 27 are arranged adjacent to each other, and the opening 20 of each current measuring unit is one. It forms as an opening part and the communication line 24 of each current measurement unit 15 is output. By adopting such an arrangement, the width of the distribution board (the width in the left-right direction in FIG. 6) can be reduced.

  Further, as in the invention of claim 6, the insertion hole 26 of the current measuring unit 27 can be formed only in the branch switch fixing plate 5. In this case, although it is a half of the embodiment, the effect of suppressing the size of the distribution board can be obtained. For the same reason, it goes without saying that the insertion hole 25 of the current measuring unit 27 may be formed only in the N-pole bus bar 3.

  As described above, the current measuring units 15 and 27 are inserted into the insertion hole 25 of the bus bar 3 and the insertion hole 26 of the branch switch fixing plate 5, so that the vertical and horizontal directions (parallel to the branch switch fixing plate 5) are obtained. Movement of the current measuring unit in the direction) can be restricted. Further, as shown in FIG. 6, the position of the opposite surface of the current measuring unit is regulated by the plane connecting portion 9 of the adjacent bus bar 3. For this reason, the movement to the front-back direction (perpendicular direction with respect to the branch switch fixing plate 5) is also controlled. As a result, the positions of the current measuring units 15 and 27 are completely restricted.

  As described above, according to the present invention, the insertion holes 25 and 26 of the current measuring units 15 and 27 are formed in the bus bar 3 or the branch switch fixing plate 5, and a part of the current measuring units 15 and 27 is formed. Since it was inserted into the insertion hole, the installation space for the current measurement unit can be secured even when the current measurement unit is enlarged, and there is no need to enlarge the distribution board.

1 Switchboard Case 2 Main Switch 3 Bus Bar 4 Branch Switch 5 Branch Switch Fixing Plate 6 Bar Holder 7 Spacer 8 Branch Bar 9 Planar Connection Portion 10 Main Lead Bar Connection Portion 11 Functional Device Connection Portion 12 Slit 13 Concave 14 Bar support base 15 Current measurement unit 16 Current sensor 17 Current detection board 18 Unit case 19 Passing hole portion 20 Opening portion 21 Arithmetic processing portion 22 Current measurement device 23 Projection portion 24 Communication line 25 Insertion hole 26 Insertion hole 27 Current measurement unit 30 Recess

Claims (6)

A plurality of branch switches connected to a plurality of bus bars;
A distribution board comprising a current measuring unit having a plurality of current sensors,
At least one bus bar comprises a plurality of branch bars extending towards the branch switch;
The current measurement unit includes a plurality of passage holes formed so that each branch bar passes through the current sensor, and the current is measured by passing the branch bar through these passage holes and measuring the current. A distribution board, wherein an insertion hole of a current measurement unit is formed in a bus bar adjacent to the bus bar, and a part of the current measurement unit is inserted into the insertion hole.   A plurality of branch switches are fixed to the branch switch fixing plate. An insertion hole for the current measurement unit is also formed in this branch switch fixing plate, and a part of the current measurement unit is inserted into this insertion hole. The distribution board according to claim 1, wherein   The branch switch and the current measuring unit are arranged on both sides of the bus bar, and the current measuring unit on one side is inserted into the insertion hole of the bus bar, and the current measuring unit on the opposite side is inserted in the branch switch fixing plate. The distribution board according to claim 2, wherein the distribution board is inserted into the hole. The current measurement unit is a unit case in which a current measurement board having a plurality of current sensors is housed in a unit case, and the current measurement board forms a projecting portion on which an arithmetic processing unit that performs arithmetic processing of a current measurement value of the current sensor is arranged. And
The distribution board according to any one of claims 1 to 3, wherein a housing portion for a protruding portion of the current measuring unit is inserted into the insertion hole of the bus bar or the branch switch mounting plate.   4. The distribution board according to claim 3, wherein both current measurement units are arranged adjacent to each other. A distribution board comprising a plurality of branch switches connected to a plurality of bus bars, and a current measuring unit having a plurality of current sensors,
At least one bus bar includes a plurality of branch bars extending toward the branch switch, and the current measuring unit includes a plurality of passage holes formed so that each branch bar passes through the current sensor. Measure the current by passing the branch bar through the passage hole,
A plurality of branch switches are fixed to a branch switch fixing plate. An insertion hole for a current measurement unit is formed in the branch switch fixing plate, and a part of the current measurement unit is inserted into the insertion hole. Distribution board.

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