JP2016082737A - Distribution panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a wiring structure within a distribution panel, to facilitate wiring work and to also reduce erroneous wiring.SOLUTION: A distribution panel comprises: a plurality of branch breakers which are juxtaposed; a plurality of sensors which detect load currents flowing in the branch breakers and include output terminals for outputting detection signals; a connection unit which is disposed oppositely to the branch breakers and includes a plurality of input parts to input the detection signals from the output terminals of the sensors in a juxtaposing direction of the branch breakers; and a measurement instrument configured to input a signal relating to the detection signals outputted from the connection unit.SELECTED DRAWING: Figure 2

Description

  Embodiments described herein relate generally to a distribution board with a power measurement function.

  2. Description of the Related Art Conventionally, in a distribution board for a house, there is one in which a power measurement unit can measure a power usage amount for each load connected to each branch breaker.

JP 2014-079115 A

  However, since the same number of current sensor cables as the number of branch breakers arranged on the distribution board must be connected to the power measurement unit one by one, the wiring in the distribution board becomes complicated and the wiring work becomes complicated. Thus, there is a problem that erroneous wiring is likely to occur. For example, in Patent Document 1, a plurality of cables extending from a current sensor are collected as a cable bundle and connected to a power measuring device.

  A distribution board according to an embodiment of the present invention includes: a plurality of branch breakers provided; a plurality of sensors having an output terminal that detects a load current flowing through the branch breaker and outputs a detection signal; and the branch breaker A connection unit having a plurality of input portions in the direction in which the branch breaker is provided from the output terminal of the sensor, the signal relating to the detection signal output from the connection unit; And a measuring device configured to be capable of inputting.

  According to this embodiment, the wiring structure in the distribution board is simplified, wiring work can be facilitated, and erroneous wiring can be reduced.

Overall view of distribution board according to the embodiment Distribution board internal unit according to the embodiment The perspective view of the distribution board internal unit concerning embodiment Connection unit according to the embodiment

  A distribution board according to an embodiment of the present invention includes: a plurality of branch breakers provided; a plurality of sensors having an output terminal that detects a load current flowing through the branch breaker and outputs a detection signal; and the branch breaker A connection unit having a plurality of input portions in the direction in which the branch breaker is provided from the output terminal of the sensor, the signal relating to the detection signal output from the connection unit; And a measuring device configured to be capable of inputting.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an overall view of a distribution board 1 with a power measuring function as an example of the present embodiment. The distribution board 1 with the power measurement function of the present embodiment is installed, for example, in a house or a store. As shown in FIG. 1, the main breaker 2, the branch breaker 3, and the communication unit 4 are connected to the distribution board. The cover 51 can be operated from the window.

  2 and 3 show a main breaker 2, a branch breaker 3, a measuring device 4, a current detector 6 that detects a current flowing from the branch breaker 3 to the load circuit, and a current detector 6. FIG. 2 is a front view and a perspective view of an internal unit having a connection unit 7 to which the connection unit 7 is connected, and a connection line 8 that connects the connection unit 7 and the measuring device 4.

  The main breaker 2 has a primary side terminal to which a single-phase three-wire commercial power supply is input and a secondary side terminal to be connected to each of the wires connected to the three conductive bars, and is fixed by a fixing means such as a screw (not shown). Mounted in box 50.

  The branch breaker 3 has an overcurrent trip function (not shown) and is provided close to each other along the longitudinal direction of the box 50 of the distribution board by a fixing means such as a screw (not shown). It is attached to two stages, an upper stage and a lower stage, in 50 short directions (vertical direction in FIG. 2). In addition, in the space between the upper stage side and the lower stage side breaker 3, three conductive bars respectively connected to the three electric wires connected to the secondary side terminal of the main breaker 2 are disposed. A 100V or 200V power source is supplied to a load connected to two selected from three conductive bars. The upper branch breaker 3 and the lower branch breaker 3 are disposed so as to face opposite sides.

  The measuring device 4 is attached to the box 50 by a fixing means such as a screw (not shown) and is disposed at one corner of the box 50. The operating power of the measuring device 4 is supplied from any of the main breaker 2, the branch breaker 3, or the conductive bar. Moreover, the measuring device 4 has a pair of input terminals 4i and 4i, and acquires the electric power information of each branch breaker 3 via this input terminal 4i. The communication unit 41 transmits the power information calculated from the current signal received via the input terminal 4i to an external communication device such as a home gateway or a personal computer that performs power management, wirelessly or by wire. As the power information to be transmitted, the calculated information may be transferred as it is, or may be transmitted after arbitrary processing.

  The case 5 includes a box 50, a cover 51, and a door 52 made of resin or a plate-like metal such as aluminum, brass, iron, and stainless steel. The box 50 includes end walls 5a and 5a provided in the upper and lower longitudinal directions, side walls 5b and 5b provided in the left and right lateral directions, a back plate 5c provided on the back side, and a cover provided with a plurality of windows on the front side. 51 is attached, the outer shape is formed in a substantially rectangular parallelepiped box shape, and the internal devices such as the main breaker 2, the plurality of branch breakers 3, and the measuring device 4 are accommodated. Further, as shown in FIG. 2, the box 50 is provided with a space for attaching the connection unit 7 above the upper branch breaker 3 and below the lower branch breaker 3. Specifically, the back plate 5c is provided with an opening 5d through which the secondary wiring connected to the branch breaker passes above the upper branch breaker 3 and below the lower branch breaker 3. . A connection unit 7 is provided between the opening 5d and the end wall 5a.

  As the sensor 6, for example, a CT (Current Transfer) sensor attached to the secondary side electric wire of the branch breaker 3 can be considered. The CT sensor includes an annular case having an insertion hole through which a predetermined one of a pair of wires connected to each branch breaker 3 is inserted, and a CT detection coil (not shown) is accommodated in the case. . When a load current flows through the wire, a detection signal corresponding to the load current is induced in the CT detection coil, and this detection signal passes through the lead wire connected to the detection coil and is output to the output terminal connected to the tip of the lead wire. Output to connection unit 7 via 6о.

  The connection unit 7 is disposed closer to the end wall 5a than the opening 5c when the box 50 is viewed from the front. Further, the connection unit 7 is provided with an input unit 7i on the front side and an output unit 7о on a surface orthogonal to the front side, and acquires a current signal corresponding to the current detected by the sensor 6 via the input unit 7i. And output to the measuring device 4 via the output unit 7о. As shown in FIG. 3, the input unit 7 i is configured such that the output terminal 6 о of the sensor 6 is detachable, and the same number as the maximum number of branch breakers 3 is provided in the direction in which the branch breakers 3 are provided. In this way, the connection unit 7 is arranged on the end wall side, and the opening 5d of the back plate 5c is provided between the branch breaker 3 and the connection unit 7, so that the secondary side wiring of the branch breaker 3 The output line of the sensor 6 and the output terminal 6о can be arranged separately, and contact between them can be prevented.

  As shown in FIG. 4, the connection unit 7 includes a substrate 7b inside a cover 7a, and includes an input unit 7i and an output unit 7о mounted on the substrate 7b. The board 7b is formed in a rectangular shape in accordance with the internal shape of the connection unit 7, and a plurality of input portions 7i are mounted along one long side, and an output portion 7о is mounted on one short side. As the substrate, a double-sided printed wiring board with printed wiring on both sides may be used, or a single-sided printed wiring board may be used.

  Further, as shown in FIG. 4, it may be configured such that it can be installed in either the upper or lower installation space of FIG. If the power information of all the branch circuits is not necessary, the sensor 6 can be attached only to the branch circuit to be measured and connected to the corresponding input unit 7i, that is, the input unit 7i having the shortest distance. Short and the same length may be used.

  The connection line 8 is composed of a plurality of signal lines, and transmits the power information flowing in the branch breaker 3 output from the connection unit 7 to the measuring device 4. An input terminal 8i and an output terminal 8о are provided at both ends of the connection line 8. The connection line 8 is connected to the connection unit 7 by connecting the input terminal 8i and the output unit 7о, When the input terminal 4i is connected, the measuring device 4 is оi connected. In addition, after the connection line 8 is connected to the connection unit 7 and the measuring device 4, a protective case 8c made of resin is attached so as to cover the connection line 8 from the front side of the connection line 8, and the connection line is moved to the front side. Protruding is prevented. Although the connection line 8 is composed of a plurality of signal lines, the input terminal 8i and the output terminal 8о are constructed as one terminal such as a connector, for example, and there is one input / output end of the iо connection line. Wiring connection work is simplified. Each of the connection lines 8 corresponds to the input unit 7i and may be configured by the same number of signal lines as the input unit 7i, or may include other power supply lines or signal lines. Moreover, the connection line 8 may not be separable from the connection unit 7 but may be provided integrally.

  Further, if the both end terminals (8i, 8о) of the connection line 8 are connected to the output section 7о of the connection unit 7 and the input terminal 4i of the measuring device 4, respectively, change adjustments such as addition work of the connection line can be performed by increasing or decreasing the sensor 6. There is no need to do. In addition, a protective case 8c made of resin can be attached to cover the connection line 8, and contact between the high and low voltage wirings can be prevented.

  Since the measuring device 4 calculates power based on current and voltage, when the 100V and 200V branch breakers 3 are mixed, the detection signal from the sensor 6 corresponds to either 200V or 100V. There is a need. Therefore, for example, in the connector of the measuring device 4 to which the connection unit 7 of FIG. 4 is connected, the first and second specific terminals from the left are determined in advance for 200V and the other terminals for 100V. A branch breaker 3 for 100V is installed from the third to the twelfth on the left, and a branch breaker 3 for 200V is installed first and second from the left. Thereby, the detection signal detected by the sensor 6 corresponding to the branch breaker 3 for 200 V can be transmitted to the measuring device 4 through the connecting unit 7 and the connecting line 8, and the power can be accurately measured by the measuring device 4. .

(Effect of embodiment)

According to the present embodiment, by arranging the connection unit outside the electric wire of the load circuit, the current detection information can be transmitted to the measurement device without drawing the connection line of the current detection unit. Also, in order to connect a plurality of sensors to the connection unit and to connect the connection line having the input / output terminals aggregated from the connection unit to the measurement device, the same number of sensors as the maximum number of branch breakers is measured one by one. The wiring structure can be simplified as compared with the case of connecting to. Moreover, since the connection line between the connection unit and the measuring device includes a signal line corresponding to the input part of the connection unit and is aggregated to one connection terminal at each end, erroneous wiring can be reduced. In addition, it is only necessary to insert and arrange the connection unit for which wiring has been completed, and wiring work can be made easier. Furthermore, the connection line can be covered with a protective case to prevent contact between the high-voltage wiring and the low-voltage wiring.

DESCRIPTION OF SYMBOLS 1 ... Distribution board 3 ... Branch breaker 4 ... Measuring device 6 ... Sensor 6о ... Output terminal 7 ... Connection unit 7i ... Input part 8 ... Connection line 8c ... Protective case

Claims (3)

A plurality of branch breakers installed;
A plurality of sensors having an output terminal for detecting a load current flowing through the branch breaker and outputting a detection signal;
A connection unit that is arranged so as to face the branch breaker and has a plurality of input parts to which the detection signal is input from the output terminal of the sensor in the direction in which the branch breaker is provided;
A measuring device configured to be able to input a signal related to the detection signal output from the connection unit;
A distribution board characterized by comprising: The distribution board according to claim 1, wherein the number of the input units is the same as the maximum number of branch breakers. A connection line connecting the measuring device and the connection unit;
A protective case covering the connecting line;
The distribution board according to claim 1, wherein the distribution board is provided.