JP6340718B2 - Internal device for distribution board and distribution board using the same - Google Patents

Description

  The present invention generally relates to a distribution board internal unit and a distribution board using the same, and more particularly to a distribution board internal unit capable of measuring a current flowing through a branch breaker and a distribution board using the same.

  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.

  The conductive bar has a flat plate portion formed in a long and rectangular plate shape and a plurality of connection terminals provided at equal intervals along the longitudinal direction of the flat plate portion. Each connection terminal is formed in an L shape that protrudes in a direction orthogonal to the flat plate portion and has a tip portion bent in parallel with the flat plate portion. And each connection terminal is inserted in the terminal part provided in each branch breaker, and between a conductive bar and each branch breaker is electrically connected.

  The current sensor unit has a long and rectangular substrate. In this substrate, a plurality of through holes are provided at equal intervals along the longitudinal direction, and a Rogowski coil is formed around each through hole. Also, a first connector is mounted at one end in the longitudinal direction of the substrate, and the second connector provided at the tip of the connection cable is connected to the first connector, so that the current sensor unit and the measurement control unit are connected. Are electrically connected.

  In this current sensor unit, the current flowing through each branch breaker can be individually detected by connecting each connection terminal passed through each through hole to the terminal portion of each branch breaker. Then, the current value of each branch breaker detected by the current sensor unit is transmitted to the measurement control unit via the connection cable.

JP 2008-136283 A

  In the distribution board shown in the above-mentioned patent document 1, since the first connector and the second connector are connected only by the coupling force between the connectors, for example, by touching the connection cable during the operation, the first connector and the second connector are connected. There was a possibility that the connection state of the two connectors would be insufficient. As a result, the detection result of the current sensor unit may not be correctly transmitted to the measurement control unit.

  The present invention has been made in view of the above problems, and provides an internal device for a distribution board having a holding structure for holding the connection state of the first connector and the second connector, and a distribution board using the same. With the goal.

An internal device for a distribution board according to the present invention includes a board electrically connected to another internal unit attached to the cabinet for the distribution board, and a second connector connected to a first connector provided on the board. A connection cable electrically connected between the other internal unit and the board; and a case for housing the board; and the case includes the second in a state in which the board is accommodated. And a restricting portion for restricting the connector from moving in a direction away from the first connector , wherein the second connector is along a first direction orthogonal to a connection direction of the second connector to the first connector. A plurality of connectors that are provided, of which the electrical wires of the connection cable are not connected to the connectors facing the restriction portion among the plurality of connectors, and the remaining connections of the plurality of connectors Connect the wires of the connection cable to the child. Characterized in that the connection was.

  A distribution board according to the present invention includes the above distribution board internal unit and the distribution board cabinet, and the distribution board cabinet is provided at an end of the connection cable opposite to the second connector. It has the holding part holding the provided 3rd connector, It is characterized by the above-mentioned.

  According to the internal device for a distribution board of the present invention, the movement of the second connector is restricted by the restricting portion in a state where the substrate is housed in the case. That is, since the holding structure for holding the connection state of the first connector and the second connector is provided, a signal transmitted between the other internal devices can be normally transmitted via the connection cable.

  According to the distribution board of the present invention, it is possible to provide a distribution board having a holding structure for holding the connection state of the first connector and the second connector by using the internal device for the distribution board. .

It is a disassembled perspective view which shows the current measuring device for distribution boards 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 which shows the principal part of the electricity distribution panel which concerns on this embodiment. It is a disassembled perspective view which shows the principal part of the electricity distribution panel which concerns on this embodiment. It is sectional drawing which shows the principal part of the current measuring device for distribution boards which concerns on this embodiment. It is a front view which shows the principal part of the current measuring device for distribution boards which concerns on this embodiment. It is a perspective view which shows the principal part of the electricity distribution panel which concerns on this embodiment.

  Embodiments of a distribution board internal device (current measuring device 5 in this embodiment) 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 distribution board cabinet 10 (hereinafter abbreviated as cabinet 10), a main breaker 2, a plurality of branch breakers 3, and conductive bars 41, 42, 43. (Refer to FIG. 4), a current measuring instrument 5 (refer to FIG. 4), and a measuring 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 a minimum configuration. It only has to be. 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 is formed in a box shape 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 cabinet 10 is attached to the front surface of the cabinet 10. 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.

  Moreover, the cabinet 10 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, 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 bar. 43 becomes a neutral pole (N phase). These conductive bars 41, 42, 43 are arranged on the right side of the main breaker 2 and are fixed to the cabinet 10.

  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 cabinet 10, the conductive bars 41, 42, 43 are inserted into the insertion ports 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.

  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. 1, the current measuring instrument 5 includes a substrate 51, a case 54, and a connection cable 55. Hereinafter, the current measuring instrument 5 disposed on the lower side with respect to the conductive bar 43 will be described. In addition, the current measuring instrument 5 arranged on the upper side is symmetrical with the current measuring instrument 5 arranged on the lower side with respect to 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.

  Here, in the present embodiment, the second hole is configured by the hole 512 and the measurement unit is configured by the coil 513. However, the second hole is not limited to the circular hole as in the above-described hole 512, but may be a rectangular hole or other shape hole, and may be a U-shape opened toward the long side or the short side of the substrate. Shaped holes may be used.

  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 substrate 51 also has a first connector 515 (see FIG. 5) to which a second connector 552 provided at one end of the connection cable 55 is connected.

  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. 1) 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 rectangular shape that is long in the front-rear direction is provided at a position facing the first connector 515 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 connection cable 55 is a cable having a plurality (9 in FIG. 1) of electric wires 551, and the second connector 552 is connected to one end, and the third connector 553 (FIG. 7) is connected to the other end. Is connected). The connection cable 55 connects the second connector 552 to the first connector 515 (see FIG. 5) of the substrate 51 and connects the third connector 553 to the measurement unit 6, so that the current measuring instrument 5 and the measurement unit 6 are connected. Is electrically connected. Here, in the present embodiment, the measuring unit 6 constitutes another internal unit.

  The second connector 552 has a plurality of connectors 5521 along the front-rear direction (longitudinal direction). In the present embodiment, the electric wires 551 are connected to the connectors 5521 at both ends in the front-rear direction. No (see FIG. 6).

  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 cabinet 10. . 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.

  Next, the assembly procedure of the current measuring instrument 5 will be specifically described with reference to FIG.

  First, the operator aligns the holes 511 of the substrate 51 with the positions of the first cylindrical portions 521 of the first case 52, and the holes 512 of the substrate 51 and the second cylindrical shapes of the first case 52. The substrate 51 is assembled to the first case 52 with the position of the portion 522 aligned. At this time, the first tubular portion 521 is passed through the hole 511 and the second tubular portion 522 is passed through the hole 512. Thereafter, the operator connects the second connector 552 of the connection cable 55 to the first connector 515 of the substrate 51.

  Finally, the operator inserts the rear edge of the second case 53 between each of the catching claws 523 of the first case 52 and the substrate 51, and then between the catching claws 524 of the first case 52 and the substrate 51. The front edge of the second case 53 is inserted. Thereby, the 2nd case 53 is attached to the 1st case 52, and the assembly of the current measuring device 5 is completed (refer FIG. 4).

  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. Further, the front surface of the case 54 remains open only by assembling the first case 52 and the second case 53, but in this embodiment, the case 56 is formed by a cover 56 formed in a U-shape with the rear surface opened. The front face of 54 is closed.

  FIG. 5 is a cross-sectional view showing a main part of the current measuring instrument 5 of the present embodiment. The opening dimension D1 of the hole 533 in the front-rear direction (vertical direction in FIG. 5) is smaller than the length dimension L1 of the second connector 552 in the front-rear direction (D1 <L1). Therefore, even if the second connector 552 is pulled in the direction of detaching from the first connector 515 (the right direction in FIG. 5), the second connector 552 contacts the inner side surfaces of the pair of restricting portions 534, and the first connector 515 The movement of the second connector 552 in the direction away from the position is restricted.

  As a result, the connection state of the first connector 515 and the second connector 552 can be maintained, and as a result, a signal (voltage signal) transmitted between the current measuring instrument 5 and the measurement unit 6 via the connection cable 55. Or power signal) can be transmitted normally.

  Here, in the present embodiment, the first hole is constituted by the hole 533 of the second case 53, and the holding structure is constituted by the pair of regulating portions 534. In the present embodiment, the vertical direction in FIG. 5 is the first direction (the direction orthogonal to the connection direction of the second connector 552 to the first connector 515).

  FIG. 6 is a front view showing a main part of the current measuring instrument 5 of the present embodiment. When the current measuring instrument 5 is assembled, the connectors 5521 at both ends of the second connector 552 in the front-rear direction (vertical direction in FIG. 6) are in the vertical direction (direction perpendicular to the paper surface in FIG. 6). It overlaps with. Therefore, when the electric wire 551 is connected to these connectors 5521, the electric wire 551 is bent inward by the restricting portion 534, and a load is applied to the electric wire 551.

  Therefore, in the present embodiment, the electric wire 551 is not connected to the connector 5521 that overlaps (opposes) the restricting portion 534 in the vertical direction, thereby suppressing the burden on the electric wire 551 of the connection cable 55. it can. In addition, the contact area of the second connector 552 with the restricting portion 534 can be increased, thereby reliably restricting the second connector 552 from moving away from the first connector 515.

  FIG. 7 is a perspective view showing a main part of the distribution board 1. The main breaker 2 described above is attached to the cabinet 10 via an attachment plate 11 formed in a rectangular plate shape by, for example, sheet metal. The mounting plate 11 is integrally formed with a side plate 111 extending rearward from the lower edge of the mounting plate 11, and the side plate 111 has two holes 1111 that open in a rectangular shape that is long in the left-right direction. It is provided to line up in the direction.

  Until the measurement unit 6 is attached to the cabinet 10, the third connector 553 of the connection cable 55 has no connection destination and is often left unconnected. When the third connector 553 is left unconnected, the connection cable 55 falls to the rear side (wall side) of the cabinet 10 during subsequent assembly work, and the connection cable is attached when the measurement unit 6 is attached. Search for 55.

  Therefore, in the present embodiment, the third connector 553 is held on the side plate 111 in a state where the third connector 553 is inserted into the hole 1111 provided in the side plate 111 of the mounting plate 11. Thereby, it is not necessary to search for the connection cable 55 after the measurement unit 6 is attached, and a decrease in workability can be suppressed. Further, by holding the third connector 553 on the side plate 111, the third connector 553 is covered with metal, and there is an advantage that the potential is stabilized by a shielding effect.

  Further, when the side plate 111 is provided at a position where the measurement unit 6 is attached (between the main breaker 2 and the measurement unit 6) as in the present embodiment, the third connector 553 is attached when the measurement unit 6 is attached. Always remove it. Therefore, the connection cable 55 can be reliably connected to the measurement unit 6. Here, in this embodiment, a holding part is constituted by the side plate 111, and a third hole is constituted by the hole 1111.

  Furthermore, the cabinet 10 of the present embodiment includes a bridge 14 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, and has a U-shape when viewed from the side. The bridge 14 has a U-shaped groove 141 formed along the vertical direction, and a plurality of protrusions 142 protruding into the groove 141 are provided at the opening edge of the groove 141. .

  The bridge 14 is attached to the cabinet 10 so as to be passed between the upper side and the lower side of the conductive bars 41, 42, 43 through the front sides of the conductive bars 41, 42, 43 (see FIG. 7). Then, by connecting the connection cable 55 from the current measuring device 5 arranged above the conductive bar 43 of the neutral electrode along the groove 141 of the bridge 14, the connection cable 55 is connected from the conductive bars 41, 42, 43. It can be kept in a separated state.

  Thereby, the influence which the noise radiated | emitted from conductive bar 41,42,43 has on the connection cable 55 can be suppressed. The connection cable 55 is held by the bridge 14 by being inserted between the bottom surface of the groove 141 and each protrusion 142.

  In addition, the control part 534 of this embodiment is an example, Comprising: As long as it can control that the 2nd connector 552 moves to the direction which remove | deviates from the 1st connector 515 in the state which assembled the electric current measuring device 5, another structure may be sufficient. In the present embodiment, the holding portion (the side plate 111 of the mounting plate 11) is provided integrally with the mounting plate 11 to which the main breaker 2 is attached. However, the holding portion may be a part of the cabinet 10, and may be a molded product. It may be a substrate.

  Further, in the present embodiment, the third connector 553 is held by the side plate 111 by hooking the third connector 553 into the hole 1111 provided in the side plate 111. However, the third connector 553 may be held by a hook or the like, for example. . In the present embodiment, a voltage induced between both ends of the coil 513 is used as a physical quantity measured by the measuring unit. However, other physical quantities may be used as long as the magnitude of the current flowing through the branch breaker 3 can be detected.

  Further, in the present embodiment, the measurement unit is configured by the coil 513 made of the Rogowski coil. However, the measurement unit may be configured by a Hall element or a GMR (Giant Magneto Resistive effect) sensor, for example. In the present embodiment, the current measuring instrument 5 is a distribution board internal unit. However, for example, the measurement unit 6 and the first to third communication adapters 7 to 9 may be the distribution panel internal unit. The form is not limited. Furthermore, the other internal unit is not limited to the measurement unit 6 and may be the first to third communication adapters 7 to 9.

  As described above, the current measuring instrument 5 (distribution panel internal unit) of the present embodiment includes the substrate 51, the connection cable 55, and the case 54. The substrate 51 is electrically connected to the measurement unit 6 (other internal device) attached to the distribution board cabinet 10. The connection cable 55 has a second connector 552 connected to the first connector 515 provided on the substrate 51 at one end, and electrically connects the measurement unit 6 and the substrate 51. The case 54 has a regulation part 534 that accommodates the substrate 51 and restricts the second connector 552 from moving in a direction away from the first connector 515 in the state in which the substrate 51 is accommodated.

  Further, like the current measuring instrument 5 of the present embodiment, the case 54 has a hole 533 (first hole) through which the connection cable 55 passes at a position facing the first connector 515 of the substrate 51 accommodated therein. Is preferred. In this case, the opening dimension D1 of the hole 533 in the first direction orthogonal to the connection direction of the second connector 552 to the first connector 515 is smaller than the length dimension L1 of the second connector 552 in the first direction. The restricting portion 534 includes a peripheral portion of the hole 533 in the case 54 and both side portions of the hole 533 in the first direction.

  Moreover, like the current measuring instrument 5 of the present embodiment, the second connector 552 preferably includes a plurality of connectors 5521 provided along the first direction. In this case, the electric wire 551 of the connection cable 55 is not connected to the connector 5521 facing the restricting portion 534 among the plurality of connectors 5521, and the electric wire 551 is connected to the remaining connector 5521 of the plurality of connectors 5521. Is connected.

  Further, like the current measuring instrument 5 of the present embodiment, a plurality of conductive bars 41 and 42 that are electrically connected to the main breaker 2 and a plurality of branching breakers 3 that are electrically connected to the plurality of branch breakers 3 respectively. It is preferable to individually measure the currents flowing through the connection terminals 413 and 423. In this case, the substrate 51 measures a physical quantity according to the magnitude of the current flowing through each of the plurality of holes 512 (second hole) through which each of the plurality of connection terminals 413 and 423 passes and each of the plurality of connection terminals 413 and 423. And a plurality of coils 513 (measurement unit).

  The distribution board 1 of this embodiment includes a current measuring instrument 5 and a distribution board cabinet 10. The distribution board cabinet 10 has a holding portion (side plate 111) that holds the third connector 553 provided at the end of the connection cable 55 opposite to the second connector 552.

  Further, like the distribution board 1 of the present embodiment, the holding part is constituted by a side plate 111 which is a part of the distribution board cabinet 10 and in which holes 1111 (third holes) are formed. preferable. In this case, the holding unit holds the third connector 553 in a state where the third connector 553 is inserted into the hole 1111.

5 Current measuring instrument (internal device for distribution board)
51 Substrate 54 Case 55 Connection Cable 552 Second Connector 534 Restriction Part

Claims (5)

A board that is electrically connected to other internal units attached to the cabinet for the distribution board;
A connection cable that has a second connector connected to the first connector provided on the substrate at one end and electrically connects the other internal unit and the substrate;
A case for storing the substrate,
The case includes a restricting portion that restricts the second connector from moving in a direction away from the first connector in a state where the substrate is accommodated .
The second connector has a plurality of connectors provided along a first direction orthogonal to the connection direction of the second connector to the first connector;
The electric wire of the connection cable is not connected to the connector facing the restriction portion among the plural connectors, and the electric wire of the connection cable is connected to the remaining connector of the plural connectors. An internal device for a distribution board characterized by that. The case has a first hole through which the connection cable passes at a position facing the first connector of the substrate housed inside,
Opening size of the first hole before Symbol first direction is smaller than the length of the second connector in the first direction,
2. The distribution board interior according to claim 1, wherein the restricting portion includes a peripheral portion of the first hole in the case and both side portions of the first hole in the first direction. vessel. A distribution board internal unit that individually measures the current flowing through a plurality of connection terminals electrically connected to each of a plurality of branch breakers and a part of a conductive bar electrically connected to a main breaker. And
The substrate includes a plurality of second holes through which each of the plurality of connection terminals passes, and a plurality of measurement units that measure a physical quantity corresponding to the magnitude of a current flowing through each of the plurality of connection terminals. The internal device for a distribution board according to claim 1 or 2, characterized by the above. It comprises the distribution board internal unit according to any one of claims 1 to 3, and the distribution board cabinet.
The distribution board cabinet has a holding part for holding a third connector provided at an end of the connection cable opposite to the second connector. The holding portion is a part of the cabinet for distribution board and is configured by a side plate in which a third hole is formed, and holds the third connector in a state where the third connector is inserted into the third hole. The distribution board according to claim 4.

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