JP2008136282A - Distribution board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate the wiring of output lines from current sensors, to protect the output lines from disconnection, and to improve the reliability of the transmission of output signals. <P>SOLUTION: The distribution board 1 includes the current sensors which detect currents flowing in branch circuits, a signal processing circuit which operates and processes the output signals of the current sensors, and an information transmission part 4 which transmits the output signals of the current sensors to a signal processing circuit. The information transmission part 4 has transmission passages for transmitting the output signals of the current sensors to the signal processing circuit, and the current sensors are connected to one another by the transmission passages and connecting points. Since the output signals of the current sensors are transmitted through the transmission passages, the wiring of the output lines from the current sensors is eliminated, and the reliability of the transmission of the output signals can be improved since there is no breakage of the transmission passages. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a distribution board having a current sensor.

  2. Description of the Related Art Conventionally, a distribution board that includes a main breaker and a branch breaker and includes a current sensor that detects a current flowing through the branch breaker is known. In this type of distribution board, each of a plurality of branch breakers is provided with a current sensor made of CT (CURRENT TRANSFORMER), and an output line is individually derived from each current sensor and connected to an energization display block. The energization display block is provided with a light emitting diode that is turned on by the output current of each current sensor, so that the energization state of the branch breaker can be displayed (see, for example, Patent Document 1).

However, since a current sensor is provided for each branch breaker, when the current sensor is installed in the distribution board, it is necessary to attach the current sensor by the number of branch breakers. As the number increased, it took more time and effort to install the current sensor and install the distribution board. In addition, since the output lines are output from the current sensors to the energization display block, the wiring is troublesome and the output lines may be disconnected.
JP-A-6-165320

  The present invention has been made in order to solve the above-described conventional problems. The output line from the current sensor is simple, the output line is difficult to break, and the transmission of the output signal is highly reliable. The purpose is to provide an electrical panel.

  In order to achieve the above object, the invention according to claim 1 is a distribution board comprising a master breaker in a main circuit and branch breakers in a plurality of branch circuits branched from the main circuit, in the branch breaker, or An information detection unit that is provided in the vicinity of the branch circuit and detects information on a current flowing through each branch circuit, a signal processing unit that performs arithmetic processing on an output signal of the information detection unit, and an output signal of the information detection unit An information transmission member that transmits to the signal processing unit, the information transmission member acquiring an output signal of the information detection unit, and information acquired by the information acquisition unit to the signal processing unit. An information output unit for outputting, and a transmission line connecting the information acquisition unit and the information output unit.

  According to a second aspect of the present invention, in the distribution board according to the first aspect, the information transmission member is formed of a printed circuit board, and an input / output signal conversion unit that converts an input / output signal of the information detection unit acquires the information. Between the transmission section and the transmission line.

  According to a third aspect of the present invention, in the distribution board according to the first or second aspect, the information detection unit is integrally formed on the information transmission member and penetrates the electric circuit of the branch circuit. It is a current sensor which detects the current which flows through.

  According to a fourth aspect of the present invention, in the distribution board according to the third aspect, the current sensor includes a metal foil pattern provided on the front and back surfaces of the printed circuit board and around an insertion hole through which the electric circuit passes. And an air-core coil having a through hole that penetrates the printed board and connects the metal foil pattern.

  According to a fifth aspect of the present invention, in the distribution board according to the fourth aspect, the air-core coil is a Rogowski-type air-core coil having a toroidal coil and a rewinding coil surrounding the periphery of the insertion hole. It is.

  A sixth aspect of the present invention is the distribution board according to any one of the first to fifth aspects, further comprising an information measurement unit connected to the information output unit, wherein the information measurement unit includes the signal processing unit. And a determination unit for determining the result of the signal processing.

  According to a seventh aspect of the present invention, in the distribution board according to the sixth aspect, a power circuit is provided in the information measurement unit, and one or both of the information detection unit and the information acquisition unit are connected to the DC by the power circuit. The information transmission member has a power supply path for supplying power.

  According to an eighth aspect of the present invention, in the distribution board according to the first aspect, the information detection unit is disposed in the branch breaker and is configured to be capable of data communication with the information acquisition unit. It is what.

  According to a ninth aspect of the present invention, in the distribution board according to the eighth aspect, the information detection unit is a current sensor, the branch breaker includes a current detection unit that detects a current flowing through the branch circuit, and a current abnormality. This is an electronic breaker having an abnormality determination unit that determines whether or not and a tripping unit that shuts off the circuit when an abnormality is determined by the abnormality determination unit.

  According to the first aspect of the present invention, wiring to the information detection unit for each branch circuit is not required, so that the labor of construction is reduced and the reliability of transmission is improved because there is no disconnection.

  According to the invention of claim 2, the reliability of signal transmission is improved and the cost is reduced.

  According to the invention of claim 3, since the information detection unit is integrally formed with the information transmission member, the reliability of signal transmission is further improved.

  According to the invention of claim 4, since the current sensor is formed integrally with the printed circuit board, the reliability of signal transmission is improved.

  According to the invention of claim 5, since the influence of the external magnetic field becomes slight, it is possible to prevent a decrease in measurement accuracy.

  According to the invention of claim 6, information of each branch circuit can be aggregated and various data processing can be performed.

  According to the seventh aspect of the present invention, power can be supplied using the information transmission member, and the cost is reduced.

  According to the invention of claim 8, since a special space for providing the information detection unit is not required, the distribution board can be reduced in size. Further, since communication is performed at a short distance, the cost is low and the reliability is high.

  According to the ninth aspect of the present invention, the electronic breaker that cuts off the circuit when the current is abnormal can be provided with a function of outputting the abnormality determination information to the outside, and the cost can be reduced.

(First embodiment)
A distribution board according to a first embodiment of the present invention will be described with reference to the drawings. 1 shows the appearance of the distribution board, FIG. 2 shows the configuration of the distribution board, FIG. 3 shows the main circuit and branch circuit of the distribution board, and FIG. 4 shows a plan view of the main circuit breaker 2. The distribution board 1 receives power from an external power source, and detects and detects a main breaker 2 in the main circuit, a branch breaker 3 in a plurality of branch circuits branched from the main circuit, and a branch current flowing in the branch circuit. An information transmission unit 4 that transmits a signal to the output end, a harness 5 that is connected to the output end of the information transmission unit 4, and a display unit that is connected to the harness 5 and receives an output signal from the information transmission unit 4 and displays it to the user 6 and a base 7 for holding the branch breaker 3 and the like.

  The distribution board 1 is a single-phase three-wire distribution board, and receives power from three power lines N, L1, and L2 from an external power source by the main breaker 2. Here, the power line N is a neutral phase. The branch breaker 3 is connected to the load-side power line of the main breaker 2 to form a branch circuit. In the case of 200V, the branch circuit breaker 3 is connected to the power lines L1 and L2, and in the case of 100V, the power line N and L1 or , N and L2. Each branch circuit is provided with an information transmission unit 4 and detects a current flowing through the branch circuit. And the electric equipment used for the secondary side of the branch breaker 3 is connected.

  The main breaker 2 includes three power source side terminals 21 and a load side terminal 22, and an open / close mechanism (not shown) for turning on / off the current between the power source side terminal and the load side terminal is provided in the main circuit breaker 2. An operating handle 23 for turning on / off the opening / closing mechanism is provided on the front of the body. Furthermore, when an overcurrent flows between the power supply side terminal and the load side terminal, the main breaker 2 has a circuit cutoff function (not shown) that shuts off between them and positions the operation handle 23 on the off side. I have.

  Next, the base stand 7 will be described. FIG. 5A shows an external appearance of a partial cross section of the base table 7, and FIG. 5B shows a cross section of the base table 7. The base 7 holds the branch breaker 3 and the three main bars 71, 72, 73 and the like that are electrically connected to the load-side terminal 22 of the main breaker 2. The main bars 71, 72, 73 are connected to the load side terminal 22 of the main breaker 2 by screws 74. The main bar 71 is a power line N, the main bar 72 is a power line L1, the main bar 73 is a power line L2, It is connected. The main bar 71 is fixed to pillars 75 provided at both ends in the longitudinal direction of the base base 7. The main bars 72 and 73 are disposed on both sides of the base table 7 in the short direction. The main bar 72 includes a flat plate portion 72a of the base base 7 and a plurality of branch bars 72b and 72c that are integrally bent at a right angle from the flat plate portion 72a and further bent into a U shape or a crank shape. . The branch bar 72b and the branch bar 72c have different heights and are alternately formed in the arrangement direction.

  Similar to the main bar 72, the main bar 73 also includes a flat plate portion 73a and branch bars 73b and 73c.

  The branch breaker 3 has a rectangular parallelepiped shape, and has three terminal portions 31a, 31b, and 31c on a side wall portion on one end side of the vessel body, and the main bar 71 and the branch bar 72b, 73c or branch bars 73b and 72c are sandwiched and electrically coupled. The branch breaker 3 has a switching mechanism (not shown) that turns on the terminal portions 31b and 31c when in use at 200V, and turns on the terminal portions 31a and 31c when in use at 100V.

  The branch breaker 3 has a pair of secondary side terminal portions 32 for connecting a load power line to the other end side of the container. The branch breaker 3 includes an opening / closing mechanism (not shown) for turning on / off the current between the terminal portions 31a, 31b, 31c and the secondary side terminal portion 32, and an operation handle 33 for turning on / off the opening / closing mechanism. have. In addition, when an overcurrent occurs between the terminal portions 31a, 31b, 31c and the secondary side terminal portion 32, the terminal portions 31a, 31b, 31c and the secondary side terminal portion 32 are interrupted, A circuit breaker mechanism (not shown) for positioning the operation handle 33 on the off side is provided.

  Next, the information transmission unit 4 will be described. 6A shows a front view of the information transmission unit 4, and FIG. 6B shows an arrangement state of the information transmission unit 4. The information transmission unit 4 includes a printed circuit board 41, and includes a CT 43 that is a current sensor 42, a transmission path 44 that transmits an output signal of the CT 43, and a connector 95 that is connected to the transmission path 44. The CT 43 is connected to the transmission line 44 by a connection point 441. The term “printed circuit board” as used in this specification refers to a circuit board on which an electronic circuit is formed by mounting or forming electronic components or wirings on a board. The printed circuit board 41 is disposed on the secondary terminal portion 32 of the branch breaker 3. Since the CT 43 is connected to the transmission path 44 of the printed circuit board 41, the wiring of the output line from the CT 43 is unnecessary, the labor of construction is reduced, and since there is no disconnection, the transmission reliability is improved.

  Next, the display unit 6 will be described. FIG. 7 shows a plan view of the display unit 6. The display unit 6 has a plurality of LEDs 61 on its surface so as to be adjacent to the corresponding branch breaker 3, and also has a signal processing circuit, a determination circuit, and a power supply circuit inside. The signal processing circuit performs a process such as amplification on the detected current of the CT 43, and the determination circuit compares and determines the output signal of the signal processing circuit and a preset current threshold value. The power supply circuit receives power from the outside and supplies DC power to the LED 61, the signal processing circuit, and the determination circuit. The LED 61 is turned on according to the comparison with the rated current value of the branch current of the corresponding branch breaker 3, and the LED 61 at the position corresponding to the branch circuit is turned on, so that it is possible to easily grasp the energization state of the circuit. it can.

  Next, processing of current information of the distribution board 1 will be described. FIG. 8 shows a circuit of the distribution board 1. The CT 43 is connected to the transmission path 44 by the contact 441 in the information transmission unit 4, and the transmission path 44 is connected to the connector 95. The connector 95 of the information transmission unit 4 is connected to the display unit 6 by the harness 5. An output signal from the information transmission unit 4 is transmitted to a signal processing circuit 62 disposed in the display unit 6, and a lighting signal is output from the determination circuit 63 to the LED 61.

  The operation of the distribution board 1 according to this embodiment configured as described above will be described. The CT 43 outputs a detection signal when the current of the branch circuit flows through the secondary side electric wire 33, and the output detection signal is transmitted to the connector 95 through the transmission path 44 and transmitted to the display unit 6 through the harness 5. . The output signal of the CT 43 is subjected to processing such as amplification by the signal processing circuit 62, and the determination circuit 63 performs a comparison determination with a preset current threshold value. When the current value of the branch circuit is larger than the set rated current value, a lighting signal is output to the LED 61 of the display unit 6 and the LED 61 is lit.

(Second Embodiment)
A distribution board 1 according to a second embodiment of the present invention will be described. FIG. 9 shows the appearance of the distribution board 1 according to the present embodiment, and FIG. 10 shows the configuration of the distribution board 1. The distribution board 1 according to the present embodiment is different from the distribution board 1 according to the first embodiment in the configuration of the information transmission unit 4 and includes an information measurement unit 8.

  The information transmission unit 4 according to this embodiment will be described. 11A shows the appearance of the front surface of the information transmission unit 4, FIG. 11B shows the appearance of the back surface of the information transmission unit 4, FIG. 11C shows the configuration of the current sensor 42, and FIG. (D) shows an arrangement state of the information transmission unit 4. The information transmission unit 4 is configured by a printed circuit board 41, and a plurality of circular first insertion holes 411 a through which branch bars 72 b and 73 b pass are arranged at one end side in the short direction of the printed circuit board 41. In the vicinity of the center of the printed circuit board 41 in the short direction, a plurality of second insertion holes 411b through which the branch bars 72c and 73c pass are arranged in parallel.

  The current sensor 42 is a Rogowski-type air core coil 412 having a toroidal coil and a rewinding coil formed so as to surround the insertion hole 411a in the periphery of the first insertion hole 411a. A metal foil pattern 413 provided on the front surface and the back surface, a through hole 414 that penetrates the printed circuit board 41 and connects the metal foil pattern 413, and the like. Since the current sensor 42 is integrally formed with the printed circuit board 41, the reliability of signal transmission is further improved. Compared with the case of current detection by CT43, the occurrence of an abnormally high voltage at the time of a coil output open failure is eliminated and it is safe. In addition, since the air core coil 412 made of a printed circuit board is used, the current sensor is thin and inexpensive, and since there is no iron core, it is possible to measure up to a large current without saturating the current detection characteristics. It can be downsized. In addition, since the Rogowski type air-core coil 412 is used, the influence of the external magnetic field is reduced, and a decrease in measurement accuracy can be prevented.

  On the other end side of the printed circuit board 41 in the short direction, a signal processing circuit 415 and a transmission circuit 416 are provided for each of the two current sensors 42. The signal processing circuit 415 samples the detection currents of the two current sensors 42 alternately by time division and performs processing such as amplification, and the transmission circuit 416 digitally converts the output signal of the signal processing circuit 415. The printed circuit board 41 is provided with a transmission path 417 for transmitting input / output signals of the signal processing circuit 415 and the transmission circuit 416 and a power supply path 418 for supplying DC power. The transmission path 417 and the power supply path 418 are provided. Is connected to a connector 95 provided at the end of the printed circuit board 41. Since digital conversion is performed on the printed circuit board 41, the reliability of signal transmission is improved and the cost is reduced. In the information transmission unit 4, the branch bar 72b or 73b is passed through the first insertion hole 411a, and the branch bar 72c or 73c is passed through the second insertion hole 411b.

  Next, the information measurement unit 8 will be described. FIG. 12 shows the appearance of the information measurement unit 8. The information measurement unit 8 includes a circuit condition setting unit 81, and the circuit condition setting unit 81 sets a rated current value of a branch circuit that is a reference when displaying on the display unit 6.

  The information measurement unit 8 has a control circuit inside, and displays on the display unit 6 based on the data detected by the information transmission unit 4 and the conditions set by the circuit condition setting unit 81. The information measurement unit 8 includes a power supply unit inside, receives power from the outside, and supplies DC power to the control circuit, the information transmission unit 4, and the display unit 6.

  Next, processing of current information of the distribution board 1 will be described. FIG. 13 shows a circuit of the distribution board 1. The current sensor 42 is connected to the signal processing circuit 415 and the transmission circuit 416 in the information transmission unit 4, and the signal processing circuit 415 and the transmission circuit 416 transmit information through a transmission path 417 and a power supply path 418. It is connected to the connector 95 of the section 4. The connector 95 of the information transmission unit 4 is connected to the information measurement unit 8 by the harness 5. An output signal from the information transmission unit 4 is transmitted to a control circuit 82 disposed in the information measurement unit 8. The circuit condition setting unit 81 disposed in the information measurement unit 8 is connected to the control circuit 82, and the set condition is transmitted to the control circuit 82. The control circuit 82 is connected to the LED 61 of the display unit 6 by the harness 5. The information measuring unit 8 is provided with a power supply unit 83. The power supply unit 83 receives power from an external power supply and supplies DC power to the information transmission unit 4 and the display unit 6 via the harness 5. . Since the output signals of the current sensor 42 of each branch circuit are collected in the information measuring unit 8, various data processing can be performed.

  The operation of the distribution board 1 according to this embodiment configured as described above will be described. The current sensor 42 outputs a detection signal when a current flows through the branch bars 72b and 73b that pass through the insertion hole 411a. The printed circuit board 41 is provided with a signal processing circuit 415 and a transmission circuit 416 for each of the two current sensors 42, and the signal processing circuit 415 performs time division on the detected currents of the two current sensors 42. The transmission circuit 416 converts the output signal of the signal processing circuit 415 into a digital signal. The digitally converted output signal is transmitted to the control circuit 82 disposed in the information measurement unit 8 via the harness 5. In the circuit condition setting unit 81 provided in the information measuring unit 8, the rated current value of the branch circuit is set as a condition for turning on the LED 61 of the display unit 6. The set condition is supplied to the control circuit 82. Is transmitted.

  The control circuit 82 performs signal processing, determination, etc., compares the current value of the branch circuit transmitted from the information transmission unit 4 with the rated current value set by the circuit condition setting unit 81, and sets the current value of the branch circuit. When it is larger than the rated current value, a lighting signal is output to the LED 61 of the display unit 6.

(Third embodiment)
A distribution board 1 according to a third embodiment of the present invention will be described. 14A shows the appearance of the branch breaker 3 according to this embodiment, FIG. 14B shows the circuit of the branch breaker 3, FIG. 14C shows the mounting state of the information transmission unit 4, and FIG. ) Shows the mounting state of the branch breaker 3. Unlike the distribution board 1 according to the second embodiment, the distribution board 1 according to this embodiment includes a current sensor 42 in the branch breaker 3. The branch breaker 3 has a current sensor 42 inside, and has a flat plate-like output terminal 34 for outputting a detection signal of the current sensor 42 at the bottom. The printed circuit board 41 of the information transmission unit 4 includes a plate spring-shaped receiving terminal 45 that receives a detection signal of the current sensor 42, a transmission path 44, and a connector 95. The connector 95 is connected to the information measurement unit 8 by the harness 5. The information transmission unit 4 is disposed on the base table 7, and the branch breaker 3 is disposed so that the reception terminal 45 of the information transmission unit 4 and the output terminal 34 of the branch breaker 3 are in contact with each other. The output signal of the current sensor 42 is transmitted to the connector 95 via the output terminal 34, the reception terminal 45, and the transmission path 44, and further transmitted to the information measurement unit 8 by the harness 5. Since the current sensor 42 is provided in the branch breaker 3 and no special space is required, the distribution board can be reduced in size.

  Signal transmission between the current sensor 42 in the branch breaker 3 and the information transmission unit 4 may be performed by light. 15A shows the appearance of a modified example of the branch breaker 3 according to the present embodiment, FIG. 15B shows the circuit of the branch breaker 3, and FIG. 15C shows the mounting state of the branch breaker 3. The branch breaker 3 includes a current sensor 42, a battery 35, an LED 36, and a light emitting circuit 37. The information transmission unit 4 includes a phototransistor 46, a transmission path 44, and a connector 95. The light emitting circuit 37 changes the illuminance and causes the LED 36 to emit light according to the current value detected by the current sensor 42. The phototransistor 46 receives the light from the LED 36 and outputs a signal, and the output signal of the phototransistor 46 is transmitted to the information measurement unit 8. Since the signal transmission between the current sensor 42 and the information transmission unit 4 is performed by light, the reliability is high, and the transmission / reception distance is short, so the cost is low. Alternatively, a power supply path may be provided in the information transmission unit 4 to supply DC power to the LED 36 and the phototransistor 46. The power supply can be performed using the information transmission unit 4 and the cost is reduced.

  Further, an electronic breaker 38 may be used for the branch breaker 3. FIG. 16A shows the appearance of a modification of the branch breaker 3 according to the present embodiment, FIG. 16B shows the mounting state of the branch breaker 3, and FIG. 16C shows the circuit of the branch breaker 3. The electronic breaker 38 includes a tripping unit 381 that interrupts the current sensor 42 and the branch circuit in the breaker, an LED 382 that emits light, a transmission circuit 383 that outputs a signal to the display unit 6 via the LED 382, and a phototransistor 384 that receives light. And a receiving circuit 385 for receiving a signal from the display unit 6 through the phototransistor 384, a control circuit 386 for controlling the tripping unit 381 and the like, and a power supply circuit 387. The power supply circuit 387 may be a battery or may receive power from an external power supply. The information transmission unit 4 includes a phototransistor 46 that receives a signal from the LED 382, an LED 47 that outputs a signal to the phototransistor 384, a transmission path 44, and a connector 95.

  The control circuit 386 and the information measurement unit 8 can transmit and receive signals. The control circuit 386 transmits the detection signal of the current sensor 42 to the information measurement unit 8 and receives the rated current value from the information measurement unit 8. When the current value of the branch circuit exceeds the rated current value, the tripping unit 381 is driven to shut off the branch circuit. The electronic breaker 38 can be provided with a function of outputting information such as a current value for determining an abnormality to the display unit 6 and the like, and the distribution board 1 for issuing an abnormality alarm can be reduced in cost.

  In addition, this invention is not restricted to the structure of the said various embodiment, A various deformation | transformation is possible in the range which does not change the meaning of invention. For example, the distribution board 1 may be a single-phase two-wire type or a three-phase type. The current sensor 42 may be a component current sensor 42 mounted on the printed circuit board 41. Further, for example, a Hall element or a magnetoresistive element may be used for the current sensor 42. Further, for example, liquid crystal may be used instead of the LED 61. In addition, a sensor that detects voltage or electric leakage may be used instead of the current sensor.

The perspective view of the electricity distribution panel which concerns on the 1st Embodiment of this invention. The block diagram of the distribution board. The circuit diagram of the main circuit and branch circuit of the distribution board. The top view of the main breaker of the distribution board. (A) is the perspective view which fractured | ruptured a part of base stand of the distribution board, (b) is front sectional drawing. (A) is a front view of the information transmission part of the distribution board, (b) is a perspective view when the information transmission part of the distribution board is mounted. The top view of the display unit of the distribution board. The circuit diagram of the distribution board. The perspective view of the distribution board which concerns on the 2nd Embodiment of this invention. The block diagram of the distribution board. (A) is a perspective view of the front surface of the branch current sensor unit of the distribution board, (b) is a perspective view of the back surface of the branch current sensor unit of the distribution board, and (c) is a current sensor of the distribution board. A perspective view, (d) is a perspective view when the branch current sensor unit is mounted. The perspective view of the information measurement unit of the distribution board. The circuit diagram of the distribution board. (A) is a perspective view of a branch breaker according to a third embodiment of the present invention, (b) is a circuit diagram of the branch breaker and an information transmission unit, (c) is a perspective view in which the information transmission unit is mounted, d) The perspective view which mounted | wore with the branch breaker. (A) is a perspective view of a branch breaker according to a modification of the third embodiment of the present invention, (b) is a circuit diagram of the branch breaker and an information transmission unit, and (c) is a perspective view in which the branch breaker is mounted. . (A) is a perspective view of a branch breaker according to a modification of the third embodiment of the present invention, (b) is a perspective view in which the branch breaker is mounted, and (c) is a circuit diagram of the branch breaker and the information transmission unit.

Explanation of symbols

1 Distribution board 2 Main breaker 3 Branch breaker 38 Electronic breaker 381 Trip part 386 Control circuit (abnormality judgment part)
4. Information transmission part (information transmission member)
41 Printed Circuit Board 411a Insertion Hole 412 Air Core Coil 413 Metal Foil Pattern 414 Through Hole 415 Signal Processing Circuit (Input / Output Signal Conversion Unit)
416 Transmission circuit (input / output signal converter)
418 Power supply path 42 Current sensor (information detection unit)
43 CT (information detector)
44 Transmission path 441 Connection point (information acquisition unit)
45 Receiving terminal (information acquisition unit)
46 Phototransistor (Information acquisition unit)
62 Signal processing circuit (signal processing unit)
8 Information Measurement Unit 82 Control Circuit (Signal Processing Unit, Judgment Unit)
83 Power supply unit (power supply circuit)
95 Connector (Information output part)

Claims (9)

In a distribution board comprising a main circuit breaker in the main circuit and branch breakers in a plurality of branch circuits branched from the main circuit,
An information detection unit that is provided in the branch breaker or in the vicinity of the branch circuit, and detects information relating to the current flowing through each branch circuit;
A signal processing unit for arithmetically processing the output signal of the information detection unit;
An information transmission member that transmits an output signal of the information detection unit to the signal processing unit,
The information transmission member includes an information acquisition unit that acquires an output signal of the information detection unit, an information output unit that outputs information acquired by the information acquisition unit to the signal processing unit, the information acquisition unit, and an information output unit A distribution board comprising: a transmission line that connects the two.   The said information transmission member is comprised by the printed circuit board, The input-output signal conversion part which converts the input-output signal of the said information detection part is arrange | positioned between the said information acquisition part and a transmission line, It is characterized by the above-mentioned. The distribution board according to 1.   The said information detection part is a current sensor which is integrally formed on the said information transmission member, penetrates the electric circuit of the said branch circuit, and detects the electric current which flows through this electric circuit, The Claim 1 or Claim 2 characterized by the above-mentioned. The distribution board described in 1.   The current sensor includes a metal foil pattern provided on the front and back surfaces of the printed circuit board and around an insertion hole through which the electric circuit passes, and a through hole that connects the metal foil pattern through the printed circuit board. The distribution board according to claim 3, wherein the distribution board is an air-core coil.   5. The distribution board according to claim 4, wherein the air core coil is a Rogowski type air core coil having a toroidal coil and a rewinding coil surrounding the periphery of the insertion hole. An information measurement unit connected to the information output unit;
The distribution board according to any one of claims 1 to 5, wherein the information measurement unit includes the signal processing unit and a determination unit that determines a result of the signal processing. A power circuit is provided in the information measurement unit,
The distribution board according to claim 6, wherein the information transmission member has a power supply path for supplying DC power from the power supply circuit to one or both of the information detection unit and the information acquisition unit. .   2. The distribution board according to claim 1, wherein the information detection unit is arranged in the branch breaker and configured to be capable of data communication with the information acquisition unit. The information detection unit is a current sensor,
The branch breaker is
A current detector for detecting the current flowing through the branch circuit;
An abnormality determination unit for determining an abnormality in current;
The distribution board according to claim 8, wherein the distribution board is an electronic breaker having a tripping unit that interrupts a circuit when an abnormality is determined by the abnormality determination unit.

Images