JP2015070686A - Distribution board - Google Patents

Abstract

In a distribution board having an outlet, communication performance by a communication device is improved. A distribution board 1 is a distribution board capable of connecting a communication device 20 capable of communicating with a smart meter 100 via a power line 90 in a predetermined frequency band. The distribution board 1 includes a main breaker 12 and an outlet 18 connected to a power line on the secondary side of the main breaker 12. The distribution board 1 also includes a branch breaker 14 connected to the secondary power line of the main breaker 12. In addition, the distribution board 1 is disposed between the connection portion of the outlet 18 and the connection portion of the branch breaker 14 in the secondary power line, and has a predetermined frequency band on the main breaker 12 side viewed from the outlet 18. An impedance upper 17 is provided to increase the impedance of a predetermined frequency band on the branch breaker 14 side as viewed from the outlet 18 relative to the impedance. [Selection] Figure 1

Description

  The present invention relates to a distribution board provided with an outlet.

  A distribution board is a device for taking in electric power supplied from an electric power company into a house and branching it out for each room or device. The distribution board includes a main breaker that draws in power from a system power supply and a branch breaker connected to an indoor power line that is branched for each room or device (see, for example, Patent Documents 1 and 2). These breakers have a function of interrupting a current path when an overcurrent flows, thereby ensuring safety.

  Here, the distribution board may be provided with a power outlet so that a power source for maintenance of the distribution board can be easily acquired (see, for example, Patent Documents 1 and 2).

JP-A-6-335123 JP-A-9-271118

  In recent years, a power meter with a communication function or the like may be provided on the primary side of the main breaker. In addition, a communication device may be provided in the house for performing PLC communication with the watt-hour meter with the communication function. However, when such a communication device is connected to an outlet of a distribution board as described in Patent Documents 1 and 2, sufficient communication performance may not be obtained.

  An object of the present invention is to improve communication performance of a communication device in a distribution board having an outlet.

  The distribution board according to the present invention is a distribution board capable of connecting a watt-hour meter with a communication function and a communication device capable of communicating via a power line in a predetermined frequency band. The distribution board includes a main breaker, an outlet connected to the secondary power line of the main breaker, and a branch breaker connected to the secondary power line of the main breaker. In addition, the distribution board is placed between the outlet of the secondary power line and the connection of the branch breaker. And an impedance upper for increasing the impedance of a predetermined frequency band on the branch breaker side as viewed from above.

  The outlet is connected to the secondary power line upstream of the branch breaker, and the impedance upper may be provided between the outlet connection and the branch breaker connection of the secondary power line. Good.

  The impedance upper may be provided in each branch breaker.

  The outlet may have a shape that can be replaced with a branch breaker.

  The outlet may have a breaker function.

  The outlet may be provided on the side surface of the casing of the distribution board.

  The outlet may be provided on a lid constituting the casing of the distribution board.

  The predetermined frequency band may be at least one of a frequency band of 10 kHz to 450 kHz and a frequency band of 2 MHz to 30 MHz.

  The branch breaker of the present invention is a branch breaker connected to the secondary side of the main breaker in the distribution board. The branch breaker includes an impedance upper that increases the impedance of a predetermined frequency band.

  The branch breaker is disposed in the distribution board, and may have a shape that can be replaced with a branch breaker that does not include an impedance upper.

  According to the present invention, the impedance of the predetermined frequency band on the branch breaker side viewed from the outlet is higher than the impedance of the predetermined frequency band on the main breaker side viewed from the outlet. Therefore, when a communication device that can communicate with the watt-hour meter with communication function connected to the primary side of the main breaker and is connected to the secondary power line of the main breaker is connected to the outlet, the communication of the communication device The signal is less likely to flow to the branch breaker side. That is, the communication signal of the communication device is more likely to flow to the main breaker side than to the branch breaker side. Therefore, the communication performance with the watt-hour meter with a communication function is improved.

The figure explaining the internal structure of the electricity distribution panel which concerns on Embodiment 1 of this invention The figure explaining the internal structure of the distribution board which concerns on Embodiment 2 of this invention The figure explaining the internal structure of the distribution board which concerns on Embodiment 3 of this invention The figure explaining the internal structure of the distribution board which concerns on Embodiment 4 of this invention The perspective view inside the main body of the distribution board which concerns on Embodiment 4 of this invention. The figure explaining the internal structure of the distribution board which concerns on Embodiment 5 of this invention External view of distribution board according to Embodiment 6 of the present invention External view of distribution board according to Embodiment 7 of the present invention

  Embodiments of a distribution board according to the present invention will be described below with reference to the accompanying drawings.

(Embodiment 1)
FIG. 1 is a diagram illustrating an internal configuration of a distribution board according to Embodiment 1 of the present invention. The distribution board 1 is a device that receives power from a system power supply via a power line and distributes the received power to a room or device in the house. As shown in FIG. 1, a smart meter 100 that measures power consumption in a house to which the distribution board 1 is connected is connected to a power line that supplies power to the distribution board 1. The smart meter 100 has a communication function in addition to the electric energy measurement function.

  In the distribution board 1, a main breaker 12 and a plurality of branch breakers 14 provided for each room or device in the house are attached to an internal storage space. The main breaker 12 has a system power supply connected to the primary side and a branch breaker 14 connected to the secondary side. The main breaker 12 is a device that cuts off the current path when the total current flowing in the house exceeds a predetermined value. The branch breaker 14 is a device that interrupts the current path when the current flowing in each room or device in the house exceeds a predetermined current value.

  The main breaker 12 and the branch breaker 14 are electrically connected to the conductive bar 16 disposed in the casing of the distribution board 1. AC power drawn into the house from the system power supply is supplied to the conductive bar 16, and power is supplied to each branch breaker 14 via the conductive bar 16.

  In the present embodiment, a communication device 20, an outlet 18, and an impedance upper 17 are further provided inside the distribution board 1.

  The communication device 20 is a device that communicates with the smart meter 100 by PLC (Power Line Communication) (power line carrier communication). The communication device 20 communicates with a branch breaker or a home HEMS (HOME ENERGY MANAGEMENT SYSTEM) by the same method as the communication method for the smart meter 100 or a different method (WiFi, LAN, etc.) and is consumed in the home. You may acquire the various information regarding electric power.

  The outlet 18 has a shape in which a power plug provided at one end of the power line of the communication device 20 can be inserted. The outlet 18 is connected to the conductive bar 16 constituting the secondary power line of the main breaker 12 via the connection line 15. The outlet 18 can connect the communication device 20. As described above, the communication device 20 can communicate with the smart meter 100 connected to the primary side of the main breaker 12. When the power plug of the communication device 20 is inserted into the outlet 18, the communication device 20 performs PLC communication with the smart meter 100 via the outlet 18, the connection line 15, the conductive bar 16, the main breaker 12, and the primary power line 90. It can be carried out.

  The impedance upper 17 is a device for increasing the impedance of a predetermined frequency band including the communication frequency band used by the communication device 20. The communication frequency band used by the communication device 20 is, for example, a band of 10 kHz to 450 kHz or 2 MHz to 30 MHz. The predetermined frequency band is a band including at least the communication frequency band. The impedance upper 17 is provided in the conductive bar 16 between the connection portion of the outlet 18 and the connection portion of the branch breaker 14. Thereby, the impedance of the predetermined frequency band on the side of the branch breaker 14 viewed from the outlet 18 becomes higher than the impedance of the predetermined frequency band on the side of the main breaker 12 viewed from the outlet 18. Therefore, when the communication device 20 that can communicate with the smart meter 100 connected to the primary side of the main breaker 12 and is connected to the secondary power line of the main breaker 12 is connected to the outlet 18, the communication device 20 Is more likely to flow to the main breaker 12 side than the branch breaker 14. Therefore, communication performance with the smart meter 100 is improved.

  The impedance upper can be configured using an inductor L, a capacitor C, a resistor R, and the like. The impedance upper may be, for example, an AC / DC separation circuit disclosed in Japanese Patent No. 3925371, Japanese Patent No. 3899822, Japanese Patent No. 2659136, or an electronic choke circuit disclosed in Japanese Patent No. 3873855. The technique for increasing the input impedance using an electronic circuit can be used.

2. Summary The distribution board 1 according to the present embodiment can connect the smart meter 100 connected to the primary side of the main breaker 12 and the communication device 20 capable of communicating via the power line 90 in a predetermined frequency band. The distribution board 1 includes a main breaker 12, an outlet 18 connected to the secondary power line of the main breaker 12, and a branch breaker 14 connected to the secondary power line of the main breaker 12. In addition, the distribution board 1 is connected to the outlet of the secondary power line between the connection portion of the outlet 18 and the connection portion of the branch breaker 14 rather than the impedance of the communication frequency band on the main breaker 12 side viewed from the outlet 18. An impedance upper 17 for increasing the impedance of the communication frequency band on the branch breaker 14 side as viewed from 18 is provided.

  Thereby, the impedance of the predetermined frequency band on the side of the branch breaker 14 viewed from the outlet 18 becomes higher than the impedance of the predetermined frequency band on the side of the main breaker 12 viewed from the outlet 18. Therefore, when the communication device 20 that can communicate with the smart meter 100 connected to the primary side of the main breaker 12 and is connected to the power line on the secondary side of the main breaker is connected to the outlet 18, the communication device 20 The communication signal is less likely to flow to the branch breaker 14 side. That is, the communication signal of the communication device 20 is more likely to flow to the main breaker side than to the branch breaker 14 side. Therefore, the communication performance with the smart meter 100 is improved.

  In the present embodiment, the outlet 18 is connected to the secondary power line on the upstream side of the branch breaker 14, and the impedance upper 17 is connected to the connection part of the outlet 18 and the branch breaker 14 on the secondary power line. Between the two parts.

  As a result, communication signals input and output by the communication device 20 are less likely to flow downstream of the impedance upper 17 in the secondary power line. Therefore, the same effect on communication performance as described in the first embodiment can be obtained.

  Further, according to this embodiment, even when there are a plurality of branch breakers 14, only one impedance upper 17 is provided between the connection part of the outlet 18 and the connection part of the branch breaker 14 in the secondary power line. Thus, the above-described effect can be obtained.

  According to the present embodiment, the predetermined frequency band is at least one of a frequency band of 10 kHz to 450 kHz and a frequency band of 2 MHz to 30 MHz. Thereby, the communication performance in the case of performing communication in these frequency bands is improved.

(Embodiment 2)
A distribution board according to Embodiment 2 of the present invention will be described. FIG. 2 is a diagram illustrating an internal configuration according to the second embodiment of the present invention.

  In the first embodiment, the impedance upper 17 is provided on the secondary power line (conductive bar 16). However, in the present embodiment, the impedance upper 17 is provided in each branch breaker 14A.

  Thereby, the communication signal input / output by the communication apparatus 20 becomes difficult to flow to the downstream side of each branch breaker 14A. Therefore, the same effect on communication performance as described in the first embodiment can be obtained.

  In the present embodiment, it is not necessary to provide an impedance upper on the distribution board 1 itself. Therefore, the effect regarding the communication performance similar to that described in the first embodiment can be obtained while simplifying the structure of the distribution board 1. Further, by replacing the existing branch breaker 14 with the branch breaker 14A having the impedance upper 17 in the existing distribution board, the same effect on communication performance as described in the first embodiment can be obtained.

(Embodiment 3)
A distribution board according to Embodiment 3 of the present invention will be described. FIG. 3 is a diagram illustrating an internal configuration of a distribution board according to Embodiment 3 of the present invention.

  In the second embodiment, the outlet 18 is connected to the secondary power line on the upstream side of the branch breaker 14. However, in this embodiment, the outlet 18 is the conductive bar 16 constituting the secondary power line. Are connected to the ends to which the main breaker 12 is not connected.

  Even in this case, communication signals input / output by the communication device 20 are less likely to flow downstream of each branch breaker 14. Thereby, the effect regarding the communication performance similar to what was demonstrated in Embodiment 1, 2 is acquired.

  Further, the same effects as those of the second embodiment can be obtained with respect to the structure of the distribution board 1 and the like.

(Embodiment 4)
A distribution board according to Embodiment 4 of the present invention will be described. FIG. 4 is a diagram illustrating an internal configuration of a distribution board according to Embodiment 4 of the present invention.

  In each of the embodiments described above, the outlet 18 is disposed with a dedicated space secured in the distribution board 1. However, in the present embodiment, the outlet 18 is replaced with the branch breaker 14.

  Specifically, in this embodiment, instead of the outlet 18 of the distribution board 1 of the third embodiment, a structure in which an outlet unit 18A having a shape replaceable with the branch breaker 14 can be replaced with the branch breaker 14 is provided. Is adopted. In this embodiment, the branch breaker 14 has a structure that can be detachably attached to a socket in a predetermined space, and is arranged in the predetermined space so that it can be connected to the conductive bar 16 and receive power supply. it can. As a structure for attaching and detaching to the socket type, for example, a structure disclosed in JP 2012-16092 A can be used.

  FIG. 5 is a perspective view of the inside of the main body of the distribution board according to Embodiment 4 of the present invention. This figure is the figure which showed the inside of the main body 10 in the state which removed the outer cover of the distribution board 1. As shown in FIG. In the figure, an example in which an outlet unit 18A having a size corresponding to two branch breakers 14 is attached to the distribution board 1 is shown.

  In the present embodiment, an outlet for supplying power to the communication device 20 can be provided simply by replacing the branch breaker 14 with the outlet unit 18A. Moreover, in this embodiment, it is not necessary to provide an outlet in the distribution board 1 itself. Therefore, the structure of the distribution board 1 can be simplified. In the existing distribution board, power can be supplied to the communication device 20 by replacing the existing branch breaker with the outlet unit 18A.

(Embodiment 5)
A distribution board according to Embodiment 5 of the present invention will be described. FIG. 6 is a diagram illustrating the internal configuration of the distribution board according to the fifth embodiment of the present invention.

  In this embodiment, instead of the outlet unit 18A of the distribution board 1 of the fourth embodiment, a structure in which a branch breaker 14B with an outlet having a shape replaceable with the branch breaker 14 can be replaced with the branch breaker 14 and provided. Adopted.

  The branch breaker 14B with the outlet has a structure in which the outlet 14Bc is attached to the secondary terminal of the branch breaker 14Ba via the connecting bar 14Bb. Thereby, the branch breaker 14Ba is turned off when a predetermined current or more flows through the communication device 20 due to a failure of the communication device 20 connected to the outlet 14Bc.

  In the present embodiment, in addition to the various effects described in the fourth embodiment, there is an effect that the main breaker 12 can be prevented from being turned off due to an overcurrent caused by a failure of the communication device 20 connected to the outlet 14Bc. The

(Embodiment 6)
A distribution board according to Embodiment 6 of the present invention will be described. FIG. 7 is a diagram illustrating the appearance of a distribution board according to Embodiment 6 of the present invention. Specifically, FIGS. 7A, 7 </ b> B, and 7 </ b> C are a top view and a front view of the distribution board 1 according to the sixth embodiment of the present invention in a state where the outer lid 11 of the distribution board 1 is opened. It is a figure and a side view.

  In the first to fifth embodiments, the outlet 18 is provided inside the distribution board 1. However, in the present embodiment, the outlet 18 is provided on the side surface 10 a of the main body 10 constituting the casing of the distribution board 1. ing.

  In this case, a configuration similar to that of the distribution board 1 of the first or second embodiment can be adopted except for the arrangement of the outlet 18. Further, the connection of the outlet 18 to the conductive bar 16 may be performed via a connection line as in the first and second embodiments. As a result, the same effects as those of the first and second embodiments can be obtained electrically. When the connection configuration as in the second embodiment is adopted, the connection position of the outlet 18 to the conductive bar 16 may be the end of the conductive bar 16 or the like. In the present embodiment, the outlet 18 can be provided using the side surface 10 a of the main body 10 of the distribution board 1 even when the outlet cannot be provided inside the distribution board 1.

(Embodiment 7)
A distribution board according to Embodiment 7 of the present invention will be described. FIG. 8 is a diagram illustrating the appearance of a distribution board according to Embodiment 7 of the present invention. Specifically, FIGS. 8A, 8 </ b> B, and 8 </ b> C are a top view and a front view of the distribution board 1 according to the sixth embodiment of the present invention in a state in which the outer lid 11 of the distribution board 1 is opened. It is a figure and a side view.

  In the first to fifth embodiments, the outlet 18 is provided on the main body 10 of the distribution board 1. However, in the present embodiment, the outlet 18 is provided on the outer lid 11 constituting the casing of the distribution board 1. Yes.

  In this case, a configuration similar to that of the distribution board 1 of the first or second embodiment can be adopted except for the arrangement of the outlet 18. Further, the connection of the outlet 18 to the conductive bar 16 may be performed via a connection line as in the first and second embodiments. As a result, the same effects as those of the first and second embodiments can be obtained electrically. When the connection configuration as in the second embodiment is adopted, the connection position of the outlet 18 to the conductive bar 16 may be the end of the conductive bar 16 or the like. In the present embodiment, even when an outlet cannot be provided inside the distribution board 1, the outlet 18 can be provided using the outer lid 11 constituting the casing of the distribution board 1.

1 Distribution board 10 Distribution board body 10 Side panel body side 11 Distribution panel outer lid 12 Master breaker 14 Branch breaker 14A Branch breaker (with impedance upper)
14B Branch breaker with outlet 14Ba Branch breaker 14Bb Connection bar 14Bc Outlet 15 Connection line 16 Conductive bar 17 Impedance upper 18 Outlet 18A Outlet unit 20 Communication device 100 Smart meter (Electric energy measuring device)

Claims (10)

A distribution board capable of connecting a watt-hour meter with a communication function and a communication device capable of communicating via a power line in a predetermined frequency band,
With the main breaker,
An outlet connected to the power line on the secondary side of the main breaker;
A branch breaker connected to the secondary power line of the main breaker;
More than the impedance of the predetermined frequency band on the main breaker side as seen from the outlet, arranged between the outlet connection part and the branch breaker connection part in the secondary power line, from the outlet An impedance upper that increases the impedance of the predetermined frequency band on the branch breaker side that is seen,
Distribution board. The outlet is connected to the secondary power line upstream of the branch breaker;
The impedance upper is provided between the connection portion of the outlet and the connection portion of the branch breaker in the secondary power line.
The distribution board according to claim 1. The impedance upper is provided in each branch breaker,
The distribution board according to claim 1. The outlet has a shape that can be replaced with the branch breaker.
The distribution board according to claim 3. The outlet has a breaker function,
The distribution board according to claim 4. The outlet is provided on the side surface of the distribution board casing.
The distribution board of any one of Claims 1-3. The outlet is provided on a lid constituting the casing of the distribution board,
The distribution board of any one of Claims 1-3. The predetermined frequency band is at least one of a frequency band of 10 kHz to 450 kHz and a frequency band of 2 MHz to 30 MHz.
The distribution board of any one of Claims 1-7. In the distribution board, a branch breaker connected to the secondary side of the main breaker,
A branch breaker provided with an impedance upper for increasing the impedance of a predetermined frequency band. The branch breaker is arranged in a distribution board,
It has a shape that can be replaced and installed with a branch breaker that does not include the impedance upper.
The branch breaker according to claim 9.

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