JP6323778B2 - Distribution board cabinet and distribution board using the same - Google Patents

Description

  The present invention generally relates to a cabinet for a distribution board and a distribution board using the same, and more particularly to a cabinet for a distribution board capable of storing a current measuring instrument for measuring a current flowing through a branch breaker and a distribution board using the same. Concerning electrical boards.

  Conventionally, a distribution board capable of measuring current for each branch breaker has been provided (see, for example, Patent Document 1). The distribution board described in Patent Document 1 includes a main breaker, a plurality of branch breakers, and a conductive bar that electrically connects the main breaker and each branch breaker. The distribution board includes a current sensor unit that individually detects a current flowing through each branch breaker, and a measurement control unit that outputs a predetermined signal based on a detection result of the current sensor unit.

  In this distribution board, a plurality of branch breakers are respectively arranged on the upper side and the lower side with respect to the conductive bar. Further, a current sensor unit is provided between the plurality of branch breakers arranged on the upper side with respect to the conductive bar and the conductive bar, and between the plurality of branch breakers arranged on the lower side with respect to the conductive bar and the conductive bar. Are arranged respectively. Furthermore, a measurement control unit is arranged on the right side of the plurality of branch breakers arranged below the conductive bar.

  In addition, each current sensor unit and the measurement control unit are electrically connected by a transmission line, and the current value for each branch breaker detected by each current sensor unit is transmitted to the measurement control unit via the transmission line. Is done.

JP 2008-136283 A

  In the distribution board shown in Patent Literature 1 described above, when the transmission line from the current sensor unit is wired to the measurement control unit, there is a case where the distribution bar is wired across the conductive bar depending on the arrangement of the measurement control unit. However, in this case, the transmission line may be affected by noise radiated from the conductive bar.

  There is also a method of wiring the transmission line through the back side of the conductive bar so that it is not easily affected by noise radiated from the conductive bar. In this case, however, the transmission line must be passed through a narrow space on the back side of the conductive bar. The workability was not good.

  The present invention has been made in view of the above problems, and provides a distribution board cabinet that improves workability while suppressing the influence of noise radiated from a conductive bar, and a distribution board using the cabinet. Objective.

A distribution board cabinet according to the present invention includes a main breaker, a plurality of branch breakers, a conductive bar that electrically connects the main breaker and the plurality of branch breakers, and each of the plurality of branch breakers. A distribution board cabinet comprising a box in which a current measuring device for measuring a flowing current and a first internal device for communicating with the current measuring device are housed at least inside, wherein the box is a front surface And two or more branch breakers of the plurality of branch breakers and the current measuring device are respectively disposed on both sides of the first direction which is the short direction of the conductive bar with respect to the center of the conductive bar. , through the front side of the conductive bar, comprising a bridge that spans between the one side and the other side of the first direction with respect to the center of said conductive bar, said bridge on the front side of the conductive bar And a second piece and a third piece extending rearward from both ends of the first piece in the first direction, and the second piece is the first piece in the first direction. Arranged on one side of the conductive bar, the third piece is arranged on the other side of the conductive bar in the first direction, and is arranged on one side of the first direction with respect to the center of the conductive bar. Further, at least a part of the transmission line between the current measuring instrument and the first inner unit arranged on the other side in the first direction with respect to the center of the conductive bar is arranged along the bridge. It is characterized by that.

  The distribution board according to the present invention includes the distribution board cabinet, the main breaker, the plurality of branch breakers, the current measuring instrument, and the first internal unit.

  According to the cabinet for distribution boards of the present invention, even when the transmission line is formed so as to straddle the conductive bar, the transmission line is arranged along the bridge by arranging at least a part of the transmission line. Thus, the influence of noise radiated from the conductive bar can be suppressed. In addition, since it is only necessary to arrange at least a part of the transmission line along the bridge, the workability can be improved as compared with the case of wiring through the back side of the conductive bar. That is, it is possible to provide a distribution board cabinet with improved workability while suppressing the influence of noise radiated from the conductive bar.

  According to the distribution board of the present invention, by using the above distribution board cabinet, it is possible to provide a distribution board with improved workability while suppressing the influence of noise radiated from the conductive bar.

It is a perspective view which shows the principal part of the electricity distribution panel which concerns on this embodiment. It is a front view which shows the state in which the internal unit of the distribution board which concerns on this embodiment was attached. It is a perspective view showing a part of distribution board concerning this embodiment. It is a disassembled perspective view which shows a part of distribution board which concerns on this embodiment. It is a disassembled perspective view of the electric current measuring device used for the electricity distribution panel which concerns on this embodiment. 6A is a front view of a bridge used in the distribution board according to the present embodiment, FIG. 6B is a right side view thereof, and FIG. 6C is a bottom view thereof. It is a top view showing typically the principal part of another distribution board concerning this embodiment.

  Embodiments of a distribution board cabinet 10 (hereinafter abbreviated as cabinet 10) and a distribution board 1 according to the present invention will be specifically described with reference to the drawings. However, the configuration described below is merely an example of the present invention, and the present invention is not limited to the following embodiment, and the technical idea according to the present invention is not deviated from other embodiments. Within the range, various changes can be made according to the design and the like.

  In addition, in this embodiment, although the case where the distribution board 1 is used for a detached house is demonstrated to an example, not only this example but the distribution board 1 is used for each dwelling unit of a housing complex, an office, a store, etc. May be. Further, in the following description, the direction shown in FIG. 2 is defined as the up / down / left / right directions, and the direction perpendicular to the paper surface in FIG. 2 is defined as the front / rear direction, but the direction in which the distribution board 1 is attached is limited. It is not the purpose.

  As shown in FIG. 2, the distribution board 1 includes a cabinet 10, a main breaker 2, a plurality of branch breakers 3, conductive bars 41, 42, 43 (see FIG. 4), and a current measuring instrument 5 (FIG. 4). And a measurement unit 6. In addition, the distribution board 1 includes a first communication adapter 7, a second communication adapter 8, and a third communication adapter 9.

  The distribution board 1 includes a cabinet 10, a main breaker 2, a plurality of branch breakers 3, conductive bars 41, 42, 43, a current measuring instrument 5, and a measuring unit 6 as its minimum configuration. It only has to have. Therefore, whether or not the distribution board 1 includes the first communication adapter 7, the second communication adapter 8, and the third communication adapter 9 is arbitrary.

  As shown in FIG. 2, the cabinet 10 includes a box-like box 110 that is long in the left-right direction and has an open front surface. A lid (not shown) that can be opened and closed with respect to the box 110 is attached to the front surface of the box 110. The cabinet 10 is used by being attached to a wall of a house, for example. The lid may be included in the cabinet 10 or may not be included in the cabinet 10.

  The box 110 has a window hole 12 penetrating in the front-rear direction, and wiring can be drawn into the interior from the back of the wall through the window hole 12.

  The box 110 has a space for mounting various internal devices such as a breaker. At the center in the box 110, the main breaker 2 and the measurement unit 6 are attached so that the main breaker 2 is on the upper side and the measurement unit 6 is on the lower side. In addition, on the right side of the main breaker 2 in the box 110, a plurality of branch breakers 3 are attached in a row of two in the vertical direction and 11 in the horizontal direction.

  Further, on the left side of the main breaker 2 in the box 110, the first communication adapter 7, the second communication adapter 8, the first communication adapter 7 is the center, the third communication adapter 9 is the lower side. A second communication adapter 8 and a third communication adapter 9 are attached.

  The main breaker 2 has a primary side terminal 21 and a secondary side terminal (not shown). A single-phase three-wire lead-in line (not shown) of a system power supply (commercial power supply) is electrically connected to the primary side terminal 21. Conductive bars 41, 42, 43 made of a conductive member having a plate shape that is long in the left-right direction are electrically connected to the secondary terminal.

  In the present embodiment, since a single-phase three-wire system is assumed as the power distribution method, the conductive bar 41 is the first voltage electrode (L1 phase), the conductive bar 42 is the second voltage electrode (L2 phase), and the conductive The bar 43 becomes a neutral electrode (N phase). These conductive bars 41, 42, 43 are arranged on the right side of the main breaker 2 and are fixed to the box 110.

  The plurality of branch breakers 3 are divided into an upper side and a lower side of the conductive bar 43 of the neutral electrode, and a plurality (11 each) are arranged in the left-right direction.

  Each branch breaker 3 has a primary side terminal (not shown) and a secondary side terminal (not shown). Conductive bars 41, 42, and 43 are electrically connected to the primary side terminals. Each of a plurality of electric circuits (not shown) is electrically connected to the secondary side terminal. In addition, the electric circuit connected to the secondary terminal of each branch breaker 3 includes, as a load, devices such as lighting fixtures and hot water supply facilities, outlets of plug connection devices, and wiring appliances such as wall switches. Connected as above.

  The conductive bar 41 of the first voltage electrode has a plurality of connection terminals 413 (see FIG. 3) protruding upward and downward at positions corresponding to the plurality of branch breakers 3. In addition, the conductive bar 42 of the second voltage electrode has a plurality of connection terminals 423 (see FIG. 3) that protrude upward and downward at positions corresponding to the plurality of branch breakers 3.

  On the other hand, each branch breaker 3 has an insertion port 31 (see FIG. 4) into which the conductive bars 41, 42, and 43 are inserted on a surface facing the conductive bars 41, 42, and 43. Three insertion ports 31 are provided in each branch breaker 3 so as to correspond to each of the three conductive bars 41, 42, and 43, and the primary side terminals of the three insertion ports 31 are provided. Of these, two outlets 31 are provided so as to be exposed.

  Thereby, in the state where each branch breaker 3 is attached to the box 110, the conductive bars 41, 42, 43 are inserted into the insertion port 31, and the primary side terminals are electrically connected to the conductive bars 41, 42, 43. Is done. The connection terminal 413 is inserted into the insertion port 31 corresponding to the conductive bar 41 of the first voltage electrode, and the connection terminal 423 is connected to the insertion port 31 corresponding to the conductive bar 42 of the second voltage electrode. Plugged in.

  As shown in FIG. 4, the conductive bars 41, 42, and 43 are held by a base 44 made of synthetic resin. The base 44 includes a bottom plate 441 formed in a plate shape that is long in the left-right direction, and prismatic support bases 442 (only one of which is shown in FIG. 4) that protrudes forward at both ends of the bottom plate 441 in the left-right direction. .

  The conductive bar 43 of the neutral electrode is formed in a plate shape that is long in the left-right direction using a conductive metal plate, and both ends in the left-right direction are connected to the support base 442 so as to be bridged between the pair of support bases 442. Fixed.

  The conductive bar 41 of the first voltage electrode is formed of a conductive metal plate, and is attached to a region above the support base 442 in the bottom plate 441. The conductive bar 41 includes a flat plate 411 disposed along the bottom plate 441 and a standing piece (not shown) protruding forward from the lower end edge of the flat plate 411. The standing piece is provided at a position corresponding to each of the plurality of branch breakers 3.

  The tip of the upright piece is divided into two forks, one being a connection terminal 413 protruding upward and the other being a connection terminal 413 protruding downward. In addition, the connection terminal 413 protruding downward is located in front of the connection terminal 413 protruding upward.

  The conductive bar 42 of the second voltage electrode is formed of a conductive metal plate and is attached to a region of the bottom plate 441 below the support base 442. The conductive bar 42 includes a flat plate 421 disposed along the bottom plate 441 and a standing piece 422 protruding forward from the upper end edge of the flat plate 421. The standing piece 422 is provided at a position corresponding to each of the plurality of branch breakers 3.

  The tip of the upright piece 422 is divided into two forks, one being a connection terminal 423 protruding downward and the other being a connection terminal 423 protruding upward. Further, the connection terminal 423 protruding upward is located in front of the connection terminal 423 protruding downward.

  With the above configuration, in this embodiment, the conductive electrode 43 is arranged below the neutral electrode conductive bar 43 so that the neutral electrode, the first voltage electrode, and the second voltage electrode are arranged in this order from the front side in the front-rear direction. Bars 41, 42, 43 are arranged. Further, on the upper side of the neutral conductive bar 43, the conductive bars 41, 42, 43 are arranged so that the neutral electrode, the second voltage electrode, and the first voltage electrode are arranged in this order from the front side in the front-rear direction. The

  Therefore, when the branch breaker 3 has primary terminals in the respective insertion ports 31 at both ends in the front-rear direction, the branch breaker 3 is connected to the neutral electrode and the first voltage electrode when attached to the upper side of the conductive bar 43, When attached to the side, it is connected to the neutral electrode and the second voltage electrode. Moreover, when the branch breaker 3 has a primary side terminal in each of the two insertion ports 31 on the rear side in the front-rear direction, the first voltage is applied regardless of whether the branch breaker 3 is attached on the upper side or the lower side of the conductive bar 43. Electrically connected to the pole and the second voltage pole.

  Here, in the present embodiment, the short direction of the conductive bars 41, 42, 43, that is, the vertical direction is the first direction.

  The current measuring instrument 5 is a sensor (current sensor) for detecting power consumption of a load (electric circuit) connected to each of the plurality of branch breakers 3. As shown in FIGS. 3 and 4, the current measuring instrument 5 is attached to the conductive bars 41, 42, 43 so that the plurality of connection terminals 413, 423 pass through, and is connected to each of the plurality of connection terminals 413, 423. Measure the value of the flowing current. 3 shows a state in which the current measuring instrument 5 is attached to the conductive bars 41, 42, 43, and FIG. 4 shows a state before the current measuring instrument 5 is attached to the conductive bars 41, 42, 43. .

  As shown in FIG. 5, the current measuring instrument 5 includes a substrate 51, a case 54, and a connection cable 55. Hereinafter, the current measuring instrument 5 arranged on the lower side will be described. Further, the current measuring instrument 5 arranged on the upper side is symmetric with the current measuring instrument 5 arranged on the lower side with respect to the center of the conductive bar 43, and thus the description thereof is omitted here.

  The substrate 51 is a printed circuit board having a multilayer structure that is long in the left-right direction. The substrate 51 is provided with a plurality of rectangular holes 511 penetrating in the thickness direction along the left-right direction. The substrate 51 is provided with a plurality of circular holes 512 penetrating in the thickness direction along the left-right direction. Each hole 512 is provided on the rear side of each hole 511 so as to line up with each hole 511 in the front-rear direction. These holes 511 and 512 are formed in sizes that allow the connection terminals 413 and 423 to pass therethrough.

  A coil 513 is formed around each hole 512 in the substrate 51. The coil 513 is a Rogowski coil that is an air-core coil that does not use a core (coreless) and generates an output corresponding to the current passing through the hole 512. The coil 513 outputs a voltage induced between both ends of the coil 513 as a physical quantity corresponding to the magnitude of the current flowing through the connection terminals 413 and 423. However, the hole 512 is not limited to a circular hole as in the present embodiment, but may be a rectangular hole or other shape hole, and may be a U-shape that is open toward the long side or short side of the substrate. It may be a hole.

  The analog signal output from each coil 513 is acquired by a signal acquisition unit (not shown) provided on the substrate 51. The signal acquisition unit A / D converts the analog signal acquired from each coil 513 to generate a current signal, and transmits the current signal to the calculation unit 514 provided on the substrate 51. In the present embodiment, two adjacent coils 513 are set as one set, and one signal acquisition unit is provided for each set. Each signal acquisition unit alternately acquires analog signals output from the two coils 513 of each set in a time division manner.

  The arithmetic unit 514 includes an A / D conversion circuit (not shown) and a signal processing circuit (not shown). The A / D conversion circuit converts a voltage signal described later output from the measurement unit 6 into a digital voltage signal. The signal processing circuit calculates the instantaneous power of each of the plurality of electric circuits based on the digital voltage signal output from the A / D conversion circuit and the current signal output from each signal acquisition unit, and calculates the instantaneous power Generate data. Further, the signal processing circuit outputs instantaneous power data to the first communication adapter 7 as measurement data.

  The case 54 is, for example, a synthetic resin molded product, and includes a first case 52 and a second case 53 as shown in FIG.

  The first case 52 is formed in a flat box shape that is long in the left-right direction and has a front surface and a lower surface opened. In the first case 52, a square cylindrical first cylindrical portion 521 that protrudes downward (on the substrate 51 side) is provided at a position facing the hole 511 of the substrate 51. Further, a cylindrical second cylindrical portion 522 that protrudes downward is provided at a position facing the hole 512 of the substrate 51 in the first case 52.

  The first cylindrical portion 521 is formed to have a size that can be passed through the hole 511, and the second cylindrical portion 522 is formed to have a size that can be passed through the hole 512.

  Furthermore, a plurality of (four in FIG. 5) hooking claws 523 are provided on the rear surface of the first case 52 along the left-right direction (longitudinal direction). A pair of hooking claws 524 are provided.

  The second case 53 is formed in a rectangular plate shape that is long in the left-right direction. A hole 531 having the same shape as the hole 511 is provided at a position facing the hole 511 in the second case 53, and a hole 532 having the same shape as the hole 512 is provided at a position facing the hole 512 in the second case 53. It has been.

  In the second case 53, a hole 533 that opens in a long rectangular shape in the front-rear direction is provided at a position facing the connector (not shown) of the substrate 51. Further, in the second case 53, a pair of restricting portions 534 are provided on the peripheral portion of the hole 533 and on both sides of the hole 533 in the front-rear direction. These restricting portions 534 are U-shaped when viewed from the front-rear direction, and are formed in a convex shape that protrudes downward.

  The current measuring instrument 5 is configured such that the rear edge of the second case 53 is inserted between the respective catching claws 523 of the first case 52 accommodating the board 51 and the board 51, and then the catching claws 524 of the first case 52 are It is assembled by inserting the front end edge of the second case 53 between the substrate 51 and the substrate 51. Note that the front surface of the case 54 is closed by a cover 56 formed in a U shape with an open rear surface.

  The connection cable 55 is a cable having a plurality of electric wires 551, and a connector 552 is connected to one end, and a connector 553 (see FIG. 1) is connected to the other end. The connection cable 55 is electrically connected between the current measuring instrument 5 and the measurement unit 6 by connecting the connector 552 to the connector (not shown) of the substrate 51 and connecting the connector 553 to the measurement unit 6. Connecting.

  In the state where the current measuring instrument 5 is assembled, the connection cable 55 is drawn out through the hole 533 of the second case 53. Here, in the present embodiment, the measurement unit 6 constitutes a first internal unit.

  The current measuring device 5 assembled as described above has the centers of the conductive bars 41, 42, 43 (the centers of the conductive bars 41, 42, 43 in the first direction, which is the short direction of the conductive bars 41, 42, 43). ) On the upper side and the lower side. The branch breaker 3 disposed on the upper side with respect to the centers of the conductive bars 41, 42, 43 is measured by the current measuring device 5 disposed on the upper side with respect to the centers of the conductive bars 41, 42, 43. The Further, the branch breaker 3 disposed below the center of the conductive bars 41, 42, and 43 receives a current from the current measuring instrument 5 disposed below the center of the conductive bars 41, 42, and 43. It is measured.

  The measuring unit 6 is electrically connected to the current measuring instrument 5 via the connection cable 55. The measurement unit 6 measures the line voltage of each of the plurality of electric circuits, and outputs the data of the line voltage to the current measuring instrument 5 as a voltage signal.

  Furthermore, the measurement unit 6 measures the current flowing through the main breaker 2 using a CT (current transformer) not shown. Then, the measurement unit 6 calculates the instantaneous power of the main breaker 2 based on the measured line voltage and current, and generates instantaneous power data.

  The current measuring device 5 of the present embodiment has a function of calculating the instantaneous power of each of the plurality of electric circuits, but does not need to have a function of calculating the instantaneous power, and at least each of the plurality of electric circuits is used. What is necessary is just to have the function to measure the flowing electric current. And when the current measuring instrument 5 has only the function to measure an electric current, the measuring unit 6 should just have the function to calculate the instantaneous electric power of each of several electric circuit.

  Here, in the present embodiment, the measurement unit 6 is electrically connected to the secondary terminal of one of the branch breakers 3, and power for power supply is supplied via the branch breaker 3. The measurement unit 6 is also electrically connected to the first communication adapter 7, outputs the generated instantaneous power data to the first communication adapter 7 as measurement data, and supplies power for power to the first communication adapter. 7 is supplied.

  The measurement unit 6 may be configured to receive power supply for power supply directly from the conductive bars 41, 42, 43.

  The first communication adapter 7 has a function of communicating with a controller (not shown). The controller is a controller for HEMS (Home Energy Management System), and controls a device (not shown) corresponding to HEMS. The device only needs to be a power consumption management target, and includes, for example, a smart meter, a solar power generation device, a power storage device, a fuel cell, an electric vehicle, an air conditioner, a lighting fixture, a hot water supply device, a refrigerator, and a television receiver. Of course, other devices may be used.

  The communication method between the first communication adapter 7 and the controller is, for example, a specific low-power radio station in the 920 MHz band (a radio station that does not require a license), ZigBee (registered trademark), Bluetooth (registered trademark), or other radio wave medium. Wireless communication may be used. In addition, the communication method between the first communication adapter 7 and the controller may be wired communication such as a wired LAN (Local Area Network). Further, as a communication protocol in communication between the first communication adapter 7 and the controller, for example, Ethernet (registered trademark), ECHONET (registered trademark) Lite, or the like may be used.

  In this embodiment, the 1st communication adapter 7 calculates the electric energy which integrated | accumulated the data of the instantaneous electric power received from the electric current measuring device 5 over predetermined time about each of several electric circuit. Further, the first communication adapter 7 calculates the amount of electric power obtained by integrating the instantaneous breaker data received from the measurement unit 6 over a predetermined time for the main breaker 2.

  The controller that communicates with the first communication adapter 7 is configured to control the device using the calculation result of the first communication adapter 7. For this reason, the controller can control an apparatus based on the instantaneous electric power and electric energy in each of several electric circuit.

  The second communication adapter 8 has a function of communicating with a power meter (not shown) having a communication function. Further, the second communication adapter 8 is mechanically coupled to and electrically connected to the first communication adapter 7. In the present embodiment, the first communication adapter 7 and the second communication adapter 8 are connected by a board-to-board connection in a state in which each part overlaps in the front-rear direction.

  A power meter is a so-called smart meter, which measures the amount of power used by a facility and communicates with a concentrator (not shown) connected to a distribution line, thereby enabling remote meter reading. Enable. In addition, the power meter can transmit a measured value (amount of power used), request information, and the like to the second communication adapter 8 by communicating with the second communication adapter 8. Here, the request information is a request for suppressing consumption of power transmitted from a server operated by a power supply company or the like to a consumer.

  The communication method between the second communication adapter 8 and the power meter may be wireless communication using radio waves as a medium, such as a specific low-power wireless station (wireless station that does not require a license) in the 920 MHz band, for example. Communication may be used. In the case of wired communication, power line communication (PLC) that performs communication using a power line as a transmission medium is applicable.

  Here, the second communication adapter 8 is preferably configured to transmit the measured value received from the power meter to the first communication adapter 7. In this case, the controller that communicates with the first communication adapter 7 may be configured to control the device using the measurement value. According to this configuration, the controller can control the device based on the measured value transmitted from the power meter.

  The third communication adapter 9 communicates with at least one of a solar power generation device (not shown), a power storage device (not shown), and a power conversion device (not shown) electrically connected to the electric vehicle. It has the function to do. In addition to power conversion for performing unidirectional charging from the distribution board 1 side to the electric vehicle, the power conversion device performs bidirectional power conversion for both charging and discharging of the storage battery of the electric vehicle. The structure used may be sufficient.

  The third communication adapter 9 is mechanically coupled to and electrically connected to the first communication adapter 7. In the present embodiment, the first communication adapter 7 and the third communication adapter 9 are connected by a board-to-board connection with a part of each of the first communication adapter 7 and the third communication adapter 9 overlapping in the front-rear direction.

  Here, the photovoltaic power generation device, the power storage device, and the power conversion device that are communication partners of the third communication adapter 9 are all devices fixedly installed in the house, and are wired with the distribution board 1. It is a device that can be routed. Therefore, the communication method between the third communication adapter 9 and the solar power generation device, the power storage device, and the power conversion device is preferably wired communication such as RS-485. The communication partner of the third communication adapter 9 is not limited to the solar power generation device, the power storage device, and the power conversion device, but may be a hot water storage type hot water supply device (Ecocute (registered trademark)), for example.

  The third communication adapter 9 may further have a communication function with at least one of a gas meter (not shown) and a water meter (not shown). Gas meters and water meters output pulse signals according to the amount used. The 3rd communication adapter 9 receives a pulse signal from a gas meter or a water meter, and converts it into the amount of use using the conversion value (conversion rate) of the amount of use per pulse determined beforehand.

  Here, the gas meter and the water meter that are communication partners of the third communication adapter 9 are both devices fixedly installed in a house, and are devices that can route wiring with the distribution board 1. is there. Therefore, it is preferable to perform wired communication between the third communication adapter 9 and the gas meter or water meter.

  In the present embodiment, the third communication adapter 9 has the two communication functions described above. However, the third communication adapter 9 may be configured by two adapters having the respective communication functions. .

  By the way, in this embodiment, as shown in FIG. 2, in addition to the plurality of branch breakers 3, a secondary interconnection breaker 100 is provided. The secondary interconnection breaker 100 is electrically connected to the conductive bars 41, 42, and 43 and is electrically connected to a first distributed power source (not shown) that is not allowed to flow backward to the power system. Is done. Examples of the first distributed power source include a fuel cell (not shown), a gas power generation device (not shown), a storage battery (not shown), and the like.

  The secondary interconnection breaker 100 is electrically connected between the secondary side of the main breaker 2 and the first distributed power source. The secondary interconnection breaker 100 disconnects the first distributed power source from the power system when, for example, power supply from the system power source is stopped or when an abnormality occurs in the system power source or the first distributed power source. Operates to (disconnect).

  Like the branch breaker 3, the secondary interconnection breaker 100 has a primary side terminal (not shown) and a secondary side terminal 101, and conductive bars 41, 42, and 43 are electrically connected to the primary side terminal. The first distributed power source is electrically connected to the secondary side terminal 101. The secondary interconnection breaker 100 is a breaker having 3P3E (the number of poles is 3 and the number of elements is 3), and the size in the left-right direction is as large as a plurality (three) of the branch breakers 3.

  In the present embodiment, a space for attaching a primary interconnection breaker (not shown) is provided on the left side of the main breaker 2 and on the right side of the first to third communication adapters 7 to 9 in the box 110. . A synthetic resin support base 13 formed in a rectangular plate shape that is long in the vertical direction is attached to the space, and the first interconnection breaker is attached to the support base 13.

  The primary interconnection breaker is electrically connected to a primary terminal of the main breaker 2 and is electrically connected to a second distributed power source (not shown) that allows reverse power flow to the power system. Examples of the second distributed power source include a solar power generation device.

  The primary interconnection breaker is electrically connected between the primary side of the main breaker 2 and the second distributed power source. Then, the primary interconnection breaker disconnects the second distributed power source from the power system when, for example, the power supply from the system power source is stopped or when an abnormality occurs in the system power source or the second distributed power source. Column).

  The primary interconnection breaker has a primary side terminal (not shown) and a secondary side terminal (not shown), and the primary side terminal 21 of the main breaker 2 is electrically connected to the primary side terminal. The second distributed power source is electrically connected to the secondary terminal. The primary interconnection breaker is 3P3E (number of poles 3, number of elements 3), and the dimension in the left-right direction is a size corresponding to a plurality of (three) branch breakers 3.

  FIG. 1 is a perspective view showing a main part of a distribution board 1 of the present embodiment. The cabinet 10 of this embodiment includes a bridge 14 that is disposed between the main breaker 2 and the branch breaker 3 in the left-right direction.

  The bridge 14 is, for example, a synthetic resin molded product. As shown in FIGS. 6A to 6C, a first piece 141 that is long in the vertical direction and a first piece 141 that extends backward from both ends in the vertical direction of the first piece 141. The two pieces 142 and the third piece 143 are U-shaped.

  As shown in FIG. 6A, a groove 1411 having a U-shaped cross section is provided on the front surface (front surface) of the first piece 141 along the vertical direction. In addition, projections 1412 projecting into the groove 1411 are provided at positions close to both ends in the vertical direction at the opening edge of the groove 1411.

The lower surface (surface) of the third piece 143, as shown in FIG. 6C, a cross-sectional U-shaped groove 1431 is provided along the longitudinal direction (vertical direction in Figure 6 (c)). In addition, a protrusion 1432 that protrudes into the groove 1431 is provided at the opening edge of the groove 1431 and at a position closer to the front. The groove 1431 provided in the third piece 143 is continuous with the groove 1411 provided in the first piece 141. That is, a groove is formed across the first piece 141 and the third piece 143.

  A hooking claw 1421 formed in a triangular shape is provided at the rear end of the second piece 142, and a hooking claw 1433 formed in a triangular shape is provided at the rear end of the third piece 143. .

  The bridge 14 is attached to the base 44 by hooking the hooking claws 1421 of the second piece 142 and the hooking claws 1433 of the third piece 143 into the hooking holes 443 (see FIGS. 3 and 4) of the base 44, respectively. In a state where the bridge 14 is attached to the base 44, the bridge 14 is arranged so as to pass through the front side of the conductive bars 41, 42, 43 and to be bridged between the upper side and the lower side of the conductive bars 41, 42, 43 ( 1 and 2).

  Then, by connecting the connection cable 55 from the current measuring instrument 5 arranged on the upper side of the neutral conductive bar 43 along the grooves 1411 and 1431 of the bridge 14, the connection cable 55 is connected to the conductive bars 41, 42, It can be kept away from 43. Thereby, the influence which the noise radiated | emitted from conductive bar 41,42,43 has on the connection cable 55 can be suppressed.

  Further, since it is only necessary to wire the connection cable 55 along the grooves 1411 and 1431 of the bridge 14, workability can be improved as compared with the case of wiring through the back side of the conductive bars 41, 42 and 43. Here, in this embodiment, a transmission line is constituted by the connection cable 55.

  In the state where the connection cable 55 is housed in the grooves 1411 and 1431 of the bridge 14, as shown in FIG. 1, between the bottom surface of the groove 1411 and each projection 1412 and between the bottom surface of the groove 1431 and the projection 1432. The connection cable 55 is inserted into the. Thereby, the connection cable 55 can be held by the bridge 14.

  By the way, until the measurement unit 6 is attached to the cabinet 10, the connector 553 of the connection cable 55 is often left unconnected. Therefore, for example, it is preferable that the connector 553 is inserted into the hole 1111 of the side plate 111 formed integrally with the mounting plate 11 to which the main breaker 2 is attached, and the connector 553 is held by the side plate 111. As a result, the connector 553 can be prevented from being left unconnected.

  FIG. 7 is a plan view schematically showing the main part of another distribution board 1 according to this embodiment. In the example shown in FIGS. 1 to 6, the connection cable 55 from the current measuring device 5 arranged on the upper side of the conductive bar 43 of the neutral electrode is arranged along the grooves 1411 and 1431 provided in the bridge 14. ing. On the other hand, in the example shown in FIG. 7, the connection cables 55 </ b> A and 55 </ b> B from each current measuring instrument 5 are connected to the board 57 attached to the front surface of the bridge 15, and the connection cable 55 </ b> C from the measurement unit 6 is connected. Connected. This will be specifically described below.

  The board 57 is a printed board having a multilayer structure that is long in the vertical direction, and connectors 571, 572, and 573 are mounted on the front surface of the board 57. The connector 571 is electrically connected to the connector 573 via the conductive pattern 574, and the connector 572 is electrically connected to the connector 573 via the conductive pattern 575.

  In FIG. 7, only one conductive pattern from each connector 571, 572 to connector 573 is shown, but in actuality, a number of conductive patterns corresponding to the number of connection cables 55A, 55B are formed. Has been.

  The bridge 15 is, for example, a synthetic resin molded product, and has a U-shape when viewed from the side. The bridge 15 passes through the front side of the conductive bars 41, 42, 43, and the upper and lower sides of the conductive bars 41, 42, 43. It is attached to the base 44 so as to be bridged between the two. A substrate 57 is fixed to the front surface of the bridge 15 by an appropriate method (see FIG. 7).

  Then, the connector 554 of the connection cable 55 </ b> A from the current measuring instrument 5 arranged on the upper side of the conductive bar 43 of the neutral electrode is connected to the connector 571 of the substrate 57. Further, the connector 555 of the connection cable 55B from the current measuring device 5 arranged below the conductive bar 43 of the neutral electrode is connected to the connector 572 of the substrate 57. Further, the connector 556 of the connection cable 55C from the measurement unit 6 is connected to the connector 573 of the substrate 57. As a result, each current measuring instrument 5 and the measuring unit 6 are electrically connected via the substrate 57.

  According to the above-described configuration, the transmission line from each current measuring instrument 5 to the measurement unit 6 can be separated from the conductive bars 41, 42, and 43, whereby noise radiated from the conductive bars 41, 42, and 43 is transmitted. The influence on the track can be suppressed. Further, the lengths of the connection cables 55A and 55B from the respective current measuring devices 5 to the board 57 can be made the same length and shortened, thereby improving the noise resistance.

  Here, in this embodiment, a transmission line is configured by the connection cables 55A, 55B, and 55C and the conductive patterns 574 and 575 of the substrate 57.

  In addition, the transmission line of this embodiment is an example, Comprising: Another structure may be sufficient if it is comprised so that between the electric current measuring device 5 and the measurement unit 6 (1st internal unit) may be connected. Further, in the present embodiment, the case where the first internal unit is the measurement unit 6 has been described as an example. However, the device is not limited to the measurement unit 6 as long as it is a device that communicates with the current measurement unit 5.

  Furthermore, in this embodiment, the current flowing through each branch breaker 3 is measured by the coil 513, but the current flowing through each branch breaker 3 may be measured by, for example, a Hall element or a GMR (Giant Magneto Resistive effect) sensor.

  As described above, the distribution board cabinet 10 of the present embodiment includes the box 110 whose front surface is open. The box 110 accommodates at least the main breaker 2, the plurality of branch breakers 3, the conductive bars 41, 42, 43, the current measuring instrument 5, and the measuring unit 6 (first inner instrument). The conductive bars 41, 42, and 43 electrically connect the main breaker 2 and the plurality of branch breakers 3. The current measuring device 5 measures the current flowing through each of the plurality of branch breakers 3. The measurement unit 6 communicates with the current measuring instrument 5. Two or more branch breakers 3 of a plurality of branch breakers 3 and a current measuring instrument are arranged on both sides of the first direction which is the short direction of the conductive bars 41, 42, 43 with respect to the centers of the conductive bars 41, 42, 43. 5 are respectively arranged. Further, the distribution board cabinet 10 passes between the front sides of the conductive bars 41, 42, 43, and is spanned between one side and the other side in the first direction with respect to the centers of the conductive bars 41, 42, 43. A bridge 14 is provided. A transmission line (connection) between the current measuring instrument 5 arranged on one side in the first direction and the measuring unit 6 arranged on the other side in the first direction with respect to the centers of the conductive bars 41, 42, 43. At least a portion of the cable 55) is disposed along the bridge 14.

  Further, like the distribution board cabinet 10 of the present embodiment, the transmission line is preferably composed of a connection cable 55. In this case, the connection cable 55 is connected to the current measuring instrument 5 arranged on one side in the first direction with respect to the centers of the conductive bars 41, 42, and 43 and the first with respect to the centers of the conductive bars 41, 42, and 43. Connection is made between the measurement unit 6 arranged on the other side of the direction. The bridge 14 has a groove 1411 formed along the first direction. At least a part of the connection cable 55 is accommodated in the groove 1411.

  Further, like the distribution board cabinet 10 of the present embodiment, the bridge 14 has a protrusion 1412 that holds the connection cable 55 accommodated in the groove 1411 between the bottom surface of the groove 1411. preferable.

  The distribution board 1 of the present embodiment includes a distribution board cabinet 10, a main breaker 2, a plurality of branch breakers 3, a current measuring instrument 5, and a measurement unit 6.

3 Branch breaker 10 Distribution panel cabinet 14 Bridge 55 Connection cable (transmission line)

Claims (4)

A main breaker; a plurality of branch breakers; a conductive bar that electrically connects the main breaker and the plurality of branch breakers; a current measuring instrument that measures a current flowing through each of the plurality of branch breakers; A cabinet for distribution board comprising a box in which at least a first internal unit that communicates with the current measuring instrument is housed, wherein the box has an open front surface,
Two or more branch breakers of the plurality of branch breakers and the current measuring device are respectively disposed on both sides of the first direction which is the short direction of the conductive bar with respect to the center of the conductive bar,
A bridge passing through the front side of the conductive bar and spanning between one side and the other side in the first direction with respect to the center of the conductive bar;
The bridge has a first piece disposed on the front side of the conductive bar, and a second piece and a third piece respectively extending backward from both ends of the first piece in the first direction,
The second piece is disposed on one side of the conductive bar in the first direction,
The third piece is disposed on the other side of the conductive bar in the first direction,
The current measuring instrument disposed on one side in the first direction with respect to the center of the conductive bar; and the first internal unit disposed on the other side in the first direction with respect to the center of the conductive bar; A cabinet for a distribution board, wherein at least a part of a transmission line between them is arranged along the bridge. The transmission line is disposed on one side in the first direction with respect to the center of the conductive bar, and on the other side in the first direction with respect to the center of the conductive bar. Consists of a connection cable that connects the first internal unit,
The bridge has a groove formed along the first direction;
The distribution board cabinet according to claim 1, wherein at least a part of the connection cable is accommodated in the groove.   The distribution board cabinet according to claim 2, wherein the bridge includes a protrusion that holds the connection cable accommodated in the groove between the bridge and a bottom surface of the groove.   It comprises the cabinet for distribution boards according to any one of claims 1 to 3, the main breaker, the plurality of branch breakers, the current measuring instrument, and the first internal unit. Characteristic distribution board.

Images