JP2014057413A - Home distribution board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a home distribution board capable of easily ensuring a mounting space while simplifying the mounting work of a current sensor.SOLUTION: Plural wires 100 connecting primary terminals 40 to each other in two interlinking breakers 4 are supported being wound by approximately a quarter turn on a support member 11 positioned immediately above the same and a support member 11 disposed in a space. As a result, three wires 100 are disposed in a central area of the space between the support members 11 aligned with the primary terminals 40 in a lateral direction. A current sensor 7 is attached as necessary to a part disposed in the central area of each of the wires 100. As a result, a mounting space of the current sensor 7 is easily ensured while simplifying the mounting work of the current sensor 7.

Description

  The present invention relates to a residential distribution board.

  In recent years, for the purpose of dealing with the shortage of power supply accompanying the shutdown of nuclear power plants, power is generated with renewable energy, such as a solar power generation system, and is further supplied from the generated power or power system Electric power demand is leveled by storing electric power in a storage battery. For example, Patent Document 1 discloses a general grid-connected photovoltaic power generation system. In such a grid-connected photovoltaic power generation system, a DC voltage / DC current output from a solar cell is converted into an AC voltage / AC current by a power conditioner, and the primary side is connected to the power system. The AC output of the inverter is output to the secondary side of the breaker. Here, between the power conditioner and the secondary side of the main breaker, a circuit breaker (usually an earth leakage breaker) called an interconnection breaker is inserted to protect the power conditioner and the solar battery. The interconnection breaker is housed in a box of a residential distribution board (hereinafter abbreviated as a residential board) together with a limiter, a main breaker, and a plurality of branch breakers.

  In addition, fuel cell cogeneration systems including household fuel cells have become widespread. In the grid-connected fuel cell power generation system, power generated by the fuel cell is converted by a power converter (power conditioner) and supplied to the secondary side of the main breaker via the grid breaker.

  In addition, the system can store the power generated by solar cells and the midnight power of the power system and supply power from the storage battery during the time when power demand increases (daytime) or when the power system fails. A system for supplying electric power to the electric equipment is also starting to be provided.

  As described above, it is expected that a distribution system that supplies power by connecting a plurality of types of distributed power sources to an electric power system will be more and more popular even in general households.

JP 2011-145076 A

  By the way, each of the above-described distributed power sources is connected in parallel to the primary side of the main breaker via the interconnection breaker. That is, the interconnected breaker of each distributed power source is housed in a box on a residential board, and a single-phase three-wire power line drawn from the lead-in port is connected by a feed wiring. For this reason, it is difficult to secure a storage space for the current sensor attached to the power supply line, and it is difficult to attach the current sensor to the power supply line.

  The present invention has been made in view of the above problems, and an object thereof is to simplify the mounting operation of the current sensor and facilitate the securing of the mounting space.

  The residential distribution board according to the present invention includes a main breaker, a plurality of branch breakers connected to the secondary terminal of the main breaker, and a plurality of wires that are sent and wired to the primary terminal of the main breaker by electric wires. An interconnection breaker, the main breaker, the branch breaker, a box in which the interconnection breaker is housed and a predetermined space is provided between adjacent interconnection breakers, and at least a part of the electric wire is And a support member that supports the electric wire so as to be disposed near the center of the space.

  In this residential distribution board, it is preferable that the support member protrudes from an attachment plate to which the interconnection breaker is attached.

  The residential distribution board according to the present invention has an effect of simplifying the mounting operation of the current sensor and facilitating securing of the mounting space.

It is a top view showing an embodiment of a distribution board for houses concerning the present invention. The current sensor in the above is shown, (a) is a through-type perspective view, (b) is a split-type perspective view.

  Embodiments of a residential distribution board (housing board) according to the present invention will be described below in detail with reference to the drawings.

  As shown in FIG. 1, the housing board according to the present embodiment includes a cabinet embedded (or exposed) in the wall of the house, and a plurality of types of internal devices (inner units) stored in the cabinet. Composed. The cabinet has a flat rectangular box 1 with an open front, a cover (not shown) that detachably covers the front of the box 1, or a door (not shown) that opens and closes the front of the box 1. Consists of.

  The box 1 is made of a synthetic resin molded body, and a plurality of metal mounting plates 10 are screwed to the inner bottom surface thereof, and a plurality of types of internal devices are respectively attached to the front surface of each mounting plate 10.

  The internal unit includes a main breaker (main switch) 2, a plurality of branch breakers (branch switches) 3, a plurality of interconnection breakers 4, a ground terminal block 5, and the like. The main breaker 2 has three primary terminals (not shown) connected to a single-phase three-wire power line drawn indoors via a watt-hour meter (smart meter) on one side (upper end). ) Side and three secondary terminals (not shown) connected to a branching conductor block 6 described later are arranged side by side on the side surface (right side in FIG. 1). However, the primary side terminal is covered with a terminal cover 20 made of an insulating material such as synthetic resin.

  The conductor block 6 includes three conductive bars (not shown) made of a long metal plate, a holding body 60 that holds the conductive bar, a cover 61 that covers a part of the conductive bar and the holding body 60, and the like. The Each conductive bar is held by the holding body 60 so that one end thereof is connected to the secondary terminal of the main breaker 2 and the portion to which the branch breaker 3 is connected is arranged at equal intervals in the front-rear direction.

  The branch breaker 3 has three notches (not shown) into which three conductive bars are inserted separately at one end, and a load screw terminal (not shown) at the other end. It has a housing. In the housing, two connection terminals (not shown) are arranged side by side in the front-rear direction on one end side where the notch is provided. Then, any two of the three conductive bars and the two connection terminals are connected, so that each branch breaker 3 is branched and connected to the secondary side terminal of the main breaker.

  The interconnection breaker 4 is composed of an earth leakage circuit breaker with single-phase, three-wire, and neutral wire phase loss protection, which is well known in the prior art. The three screw terminals 41 on the side are arranged in parallel on the other end (lower end) side. Since the main breaker 2, the branch breaker 3, the interconnection breaker 4, and the conductor block 6 described above are well known in the art, illustration and description of the detailed structure are omitted.

  Next, the attachment structure of the interconnection breaker 4 which is the gist of the present invention will be described. As shown in FIG. 1, the two interconnection breakers 4 are attached to the mounting plate 10 with a predetermined space (a space substantially equal to the lateral width of the interconnection breaker 4). Then, a power line (not shown) drawn from the outside and the electric wire 100 for feed wiring are connected to the primary side terminal 40 of the left interconnection breaker 4. Furthermore, the other end of the electric wire 100 for feed wiring and the other end of the electric wire 101 having one end connected to the primary side terminal of the main breaker 2 are connected to the primary side terminal 40 of the right interconnection breaker 4. The

  Here, the mounting plate 10 to which the interconnection breaker 4 is attached is provided with a plurality of support members 11 that support the electric wire 100 so that at least a part of the electric wire 100 is arranged near the center of the space. The support member 11 is made of, for example, a cylindrical synthetic resin molding, and protrudes from the mounting plate 10 by inserting a rear end portion into a mounting hole (not shown) drilled in the mounting plate 10.

  These support members 11 are respectively disposed immediately above the primary side terminals 40 of the interconnection breakers 4, and are arranged in the lateral direction with the support members 11 and the primary side terminals 40 immediately above the primary side terminals 40. Are arranged in the space.

  The electric wire 100 that connects the primary side terminals 40 of the two interconnection breakers 4 is wound around the support member 11 directly above and the support member 11 arranged in the space, respectively, by approximately one quarter turn. To be supported. As a result, the three electric wires 100 are arranged near the center of the space between the primary side terminal 40 and the support member 11 arranged in the lateral direction. And the current sensor 7 is attached to the part arrange | positioned near the center of each electric wire 100 as needed.

  The current sensor 7 is well known in the art. For example, as shown in FIG. 2 (a), a secondary winding (detection winding) is wound in a synthetic resin case 70 formed in an annular shape. It is a so-called penetration type in which a toroidal core is housed. In the case of the through-type current sensor 7, after the electric wire 100 is inserted into the hole 71 at the center of the case 70, the feed wiring of each interconnection breaker 4 is performed. As shown in FIG. 2 (b), the current sensor 7 houses a toroidal core divided into two and wound with a secondary winding in two semicircular cases 72 and 72. There is also a so-called split type in which the cases 72, 72 are pivotally supported at one end side. In the case of the split type current sensor 7, it can be attached to the electric wire 100 after the feed wiring of each interconnection breaker 4 is completed.

  As described above, in the present embodiment, since at least a part of the electric wire 100 is supported by the support member 11 and disposed near the center of the space provided between the plurality of interconnection breakers 4, the mounting operation of the current sensor 7 is performed. Simplification and securing of the installation space can be achieved.

1 Box 2 Master Breaker 3 Branch Breaker 4 Interconnection Breaker 7 Current Sensor
11 Support member
100 wires

Claims (2)

  A main breaker, a plurality of branch breakers connected to a secondary side terminal of the main breaker, a plurality of interconnection breakers sent and wired to a primary side terminal of the main breaker by an electric wire, the main breaker, and the A branch breaker, a box in which the interconnection breaker is housed and a predetermined space is provided between adjacent interconnection breakers, and at least a part of the electric wire are arranged near the center of the space. And a supporting member for supporting the electric wire.   The residential distribution board according to claim 1, wherein the support member protrudes from a mounting plate to which the interconnection breaker is attached.

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