Wiring space reduced switching board

Abstract

To achieve "reduction of a wiring space", etc., by suspending a wire from one side of a system breaker or a switching device, in which a current flows in a lateral direction, inside a laterally long board box body and suspending a wire from the other side of a branch breaker in which a current flows in a reverse lateral direction.SOLUTION: In a switching board 1, which outputs an AC current from a system K or a self-supporting power source D, inside a laterally long board box body 2, there are provided a system breaker 3 or a switching device 4, which makes the AC current, etc., from the system K flow in a lateral direction, and a branch breaker 5 which makes the AC current from the system K flow in a reverse lateral direction. At one side in the board box body 2, a system wire 10K is suspended from one side of the system breaker 3 and a branch wire 10B is suspended from one side of the branch breaker 5. At the other side in the board box body 2, an output wire 10S is suspended from the other side of the switching device 4. Regarding the switching device 4, outside a switcher 4A incorporating a self-supporting coil 4b, etc., for AC current output from the self-supporting power source D, at rear sides of the breakers 3 and 5, a self-supporting relay 4B for exciting the self-supporting coil 4b may be arranged.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a changeover panel that switches whether AC current from a system or an independent power source is to be flowed outside a panel box. [Background technology]

[0002] 2. Description of the Related Art Conventionally, a breaker box and the like are known (see Patent Document 1). This breaker box is equipped with a main earth leakage breaker that connects the power inlet wiring to the commercial grid, a switch that switches between the main earth leakage breaker, the EV-PCS, and household loads, etc., an EV-PCS breaker that connects the wiring to the EV-PCS, and a housing to house these. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-127137 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, as shown in FIG. 3 of the breaker box described in Patent Document 1, the housing is long horizontally (the longitudinal direction is approximately horizontal) and current flows from top to bottom in each breaker, so that the wiring coming out from the bottom of a breaker or from a switch must be twisted around in a crank shape and connected to the top of an adjacent breaker. Therefore, the wiring creates a lot of dead space inside the housing.

[0005] In consideration of these points, the present invention aims to provide a switching panel that achieves "reduced wiring space" by hanging wiring from one side of a system breaker or switching device, through which current flows horizontally, within a horizontally long panel box, and hanging wiring from the other side of a branch breaker, through which current flows in the opposite horizontal direction. [Means for solving the problem]

[0006] The changeover panel 1 according to the present invention has a panel box 2 and is a changeover panel that switches between an AC current from a system K outside the panel box 2 and an AC current from an independent power source D outside the panel box 2 to be flowed outside the panel box 2. The panel box 2 includes within it a system breaker 3 capable of interrupting the AC current from the system K outside the panel box 2, a switching device 4 capable of switching between the AC current from the system K via the system breaker 3 and the AC current from the independent power source D outside the panel box 2 to be flowed outside the panel box 2, and a switch between the system breaker 3 and the switch A branch breaker 5 is provided between the switching devices 4 and capable of blocking the flow of AC current from the system K branched off from the system K to the independent power source D, the panel box 2 has a longitudinal direction, and the longitudinal direction is a left-right direction, the system breaker 3 receives AC current from the system K from one side in the left-right direction and outputs AC current from the system K from the other side, and the switching device 4 receives AC current from the system K via the system breaker 3 from one side in the left-right direction and outputs AC current from the system K from the other side. Alternatively, the branch breaker 5 outputs AC current from the system K via the system breaker 3 from the other side in the left-right direction, and outputs AC current from the system K from one side. The switching panel includes system wiring 10K for passing AC current from the system K outside the panel box 2 to the system breaker 3, output wiring 10S for passing AC current from the switching device 4 to the outside of the panel box 2, and an independent power source D for passing AC current from the system K via the branch breaker 5 to the independent power source D outside the panel box 2. The first feature is that it also has branch wiring 10B that flows to a source D, and on one left-right side within the panel box 2, the system wiring 10K hangs down from one left-right side of the system breaker 3 to the outside of the panel box 2, and the branch wiring 10B hangs down from one left-right side of the branch breaker 5 to the outside of the panel box 2, and on the other left-right side within the panel box 2, the output wiring 10S hangs down from the other left-right side of the switching device 4 to the outside of the panel box 2.

[0007] A second feature of the switching panel 1 of the present invention is that, in addition to the first feature, the panel box 2 is provided with a door 2a that can be opened and closed on the front side, and the switching device 4 is equipped with a switch 4A that incorporates a system coil 4a that is excited when AC current from the system K via the system breaker 3 is caused to flow outside the panel box 2 and an independent coil 4b that is excited when AC current from the independent power source D is caused to flow outside the panel box 2, and an independent relay 4B that excites the independent coil 4b when AC current from the independent power source D is input to the switching device 4, and within the panel box 2, the independent relay 4B is arranged outside the switching housing 4A' of the switch 4A and rearward of the system breaker 3 and / or branch breaker 5.

[0008] A third feature of the switching panel 1 of the present invention is, in addition to the first or second feature above, that a charging breaker 6 is provided within the panel box 2, which is capable of blocking the flow of AC current from system K via the system breaker 3 to a charger J outside the panel box 2, and conversely, the charging breaker 6 also receives AC current from system K via the system breaker 3 from the other left-right side and outputs AC current from the system K from one side, and the switching panel also has a charging wiring 10J that carries AC current from system K via the charging breaker 6, and on one left-right side within the panel box 2, the charging wiring 10J hangs down from one left-right side of the charging breaker 6 to the outside of the panel box 2.

[0009] Due to these features, by providing a system breaker 3, switching device 4, and branch breaker 5 that pass current along the left-right direction within a panel box 2 that is long in the left-right direction (horizontal), it is possible to run short wiring in the horizontal direction between each of the devices and equipment 3, 4, and 5 without having to wrap around in a crank shape, unlike Patent Document 1, and it is possible to reduce the space required for wiring 10 within the panel box 2 ("reduced wiring space"). At the same time, by flowing current only in the branch breaker 5 in the horizontal direction, opposite to the system breaker 3 and switching device 4, even if the width of the branch breaker 5 is narrower than the width of the switching device 4 etc. and the branch breaker 5 and the system breaker 3 etc. are arranged vertically inside the panel box 2, the current output from the other left / right side of the system breaker 3 can be input from the other left / right side of the branch breaker 5. This means that the wiring can be short and roughly vertical between the other left / right sides of the vertically arranged system breaker 3 and branch breaker 5 without having to go around in a crank shape between each device / equipment 3, 5, thereby also achieving a "reduction in wiring space" in this respect. In addition to this, by hanging system wiring 10K from one side of the system breaker 3 on one side of the panel box 2, hanging branch wiring 10B from one side of the branch breaker 5, and hanging output wiring 10S from the other side of the switching device 4 on the other side of the panel box 2, the wiring 10K, 10B, 10S extending from each device / equipment 3, 4, 5 to the outside of the panel box 2 can also be made as short as possible within the panel box 2, and in this respect too, "reduction in wiring space" is achieved. In addition, it becomes possible to shorten the wiring between each of the devices and equipment 3, 4, and 5, and between the system K and the independent power source D outside the panel box 2, etc. ("shortening the wiring"). Since the wiring is shortened, the possibility of breakage is reduced, which can be said to improve reliability. It also becomes possible to effectively utilize the space inside the panel, such as by arranging other devices and equipment in the empty space 2e inside the panel box 2. Incidentally, the switchboard 1 according to the present invention can also be said to be a "switchboard of reduced wiring space" since wiring space is reduced in various ways.

[0010] In addition, by arranging the independent relay 4B, which excites the independent coil 4b outside the switch 4A incorporating the system coil 4a and independent coil 4b of the switching device 4, behind the system breaker 3 and branch breaker 5 inside the panel box 2 which has an openable and closable door 2a on the front side, the switch 4A itself can be made smaller by the amount that the independent relay 4B is arranged outside the switching housing 4A', and the space inside the panel behind the breakers 3 and 5 can be effectively utilized. Furthermore, the switching device 4 of the changeover panel 1 is equipped not only with a changeover switch 4A incorporating a system coil 4a and an independent coil 4b, but also with an independent relay 4B (for sequence control) for automatically progressing through each stage of the changeover control in accordance with a predetermined order or procedure, and therefore can also be said to be a changeover panel with an "automatic changeover sequence built in."

[0011] Furthermore, the charging breaker 6, which passes current along the left-right direction within the horizontally long panel box 2, also passes current horizontally, opposite to the system breaker 3 and switching device 4, like the branch breaker 5, so that the width of the charging breaker 6 is narrower than the width of the switching device 4, etc., and even if the charging breaker 6 and the system breaker 3, etc. are lined up vertically within the panel box 2, the current output from the other left-right side of the system breaker 3 can be input from the other left-right side of the charging breaker 6. This means that it is possible to run short wiring in an approximately vertical direction between the other left-right sides of the vertically lined up system breaker 3 and charging breaker 6 without having to go around in a crank shape between each device 3, 6, and therefore it is possible to "reduce wiring space" even if a charging breaker 6 is added within the panel box 2. In addition to this, by hanging the charging wiring 10J from one side of the charging breaker 6 on one side within the panel box 2, the charging wiring 10J extending from the charging breaker 6 to the outside of the panel box 2 can also be made as short as possible within the panel box 2, which also achieves a "reduction in wiring space" and makes it possible to shorten the wiring between each device 3, 6 and between the charger J outside the panel box 2 ("shortening the wiring").As the wiring is shortened, the possibility of breakage, etc. is reduced, thereby improving reliability and making effective use of the space within the panel. Effect of the Invention

[0012] With the switching panel of the present invention, within a horizontally long panel box, wiring can be hung down from one side of a system breaker or switching device through which current flows horizontally, and wiring can be hung down from the other side of a branch breaker through which current flows in the opposite horizontal direction, thereby making it possible to achieve "reduction of wiring space," etc. [Brief description of the drawings]

[0013] [Figure 1] 1 is a photograph in lieu of a drawing showing a front view of each device, apparatus, and wiring in a switchboard (inside a panel box) according to the present invention. [Diagram 2] This is a photograph in lieu of a drawing that shows an oblique view of each device, apparatus, and wiring (such as the independent relays behind each breaker) in the switchboard (inside the panel box). [Diagram 3] This is a photograph in lieu of a drawing that shows a side view of each device, equipment, and wiring (such as the independent relays behind each breaker). [Figure 4] FIG. 2 is a schematic circuit diagram showing a switching board. [Diagram 5] 1 is a photograph in lieu of a drawing showing an oblique view of a panel box body of a switching panel. [Figure 6] FIG. 2 is a circuit diagram of a switching device and the like. [Figure 7] This is a photograph in lieu of a drawing showing a front view of each device, apparatus, and wiring in a modified example of a switching panel (inside the panel box). [Figure 8] This is a photograph in lieu of a drawing that shows an oblique view of each device, apparatus, and wiring (such as the switching device behind the monitoring device and the independent relays behind each breaker) in a modified switchboard (inside the panel box). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. <Switch board 1> 1 to 8 show a switch panel 1 according to the present invention. This switching panel 1 has a panel box 2 and is a panel that switches between the AC current from the system K outside the panel box 2 and the AC current from an independent power source D outside the panel box 2 to be flowed (output) outside the panel box 2. The switching panel 1 has a system breaker 3, a switching device 4, and a branch breaker 5, which will be described later, inside a panel box 2. The switching panel 1 also has system wiring 10K, output wiring 10S, and branch wiring 10B, which will be described later.

[0015] In addition, the switching panel 1 may have other wiring 10, such as a charging breaker 6 and charging wiring 10J, which will be described later, within the panel box 2, as well as a power supply wiring 10D, which will be described later, a monitoring device 11, and an instrument current transformer 12 that measures AC current from the system K. The switching panel 1 may be installed on the outer wall (outdoors) of a building such as an ordinary house, for example, next to an existing outdoor trading meter (system K electricity meter) M. In this case, installation (construction and construction) can be done only outdoors. The AC current from the switchboard 1 may be connected via output wiring 10S to an indoor distribution board (not shown) or a load J' such as a charger J described later.

[0016] <Disc box body 2> As shown in Figures 1 to 8, the panel box 2 has a longitudinal direction 2L, which is a left-right direction (i.e., horizontally long). Inside the panel box 2, a system breaker 3, a switching device 4, a branch breaker 5, etc., which will be described later, are provided, and also wiring (at least a part of it), such as system wiring 10K, output wiring 10S, branch wiring 10B, etc., which will be described later, are provided. In addition, the inside of the panel box 2 may be provided with the wiring 10 itself, as well as fasteners such as screws, bolts, nuts, etc. for attaching each of the devices / equipment 3, 4, 5, etc. to the panel box 2, and may also be provided with a wiring space (cable space) 2b for installing (laying out) the wiring 10, which will be described later. In particular, as shown in Figs. 1 to 3, 7 and 8, inside the panel box 2, the wiring 10 connecting the devices 3, 4 and 5 is very short (and the gaps are also very narrow).

[0017] Inside the panel box 2, devices and apparatuses 3, 4, 5, etc., which will be described later, are mounted so that their left and right directions are approximately parallel to the longitudinal direction 2L of the panel box 2. Here, in the present invention, "the left and right directions of each of the devices and equipment 3, 4, 5, etc. are approximately parallel to the longitudinal direction 2L of the panel box body 2" does not only mean that the left and right directions of each of the devices and equipment 3, 4, 5, etc. are parallel to the longitudinal direction 2L of the panel box body 2, but also means that the left and right directions of each of the devices and equipment 3, 4, 5, etc. are slightly inclined to the longitudinal direction 2L of the panel box body 2 (for example, the angle between the longitudinal direction 2L of the panel box body 2 and the left and right directions of each of the devices and equipment 3, 4, 5, etc. is greater than 0° and not more than 5°, preferably not more than 3°, and more preferably not more than 1°).

[0018] As shown in Figures 1 to 3, 7 and 8, the arrangement of the devices and equipment 3, 4, 5 etc. inside the panel box 2 may be such that the system breaker 3 and the branch breaker 5 are mounted side by side vertically (up and down) on one side in the left-right direction inside the panel box 2, and the switching device 4 is mounted on the other side in the left-right direction inside the panel box 2, or the system breaker 3 and the branch breaker 5 may be mounted side by side vertically in the up-down order reversed from that in Figures 1 to 3, 7 and 8 on one side in the left-right direction inside the panel box 2, and further, the system breaker 3, the branch breaker 5 and the switching device 4 may be mounted side by side in the left-right direction on one end side and the other end side in the left-right direction inside the panel box 2 reversed from that in Figures 1 to 3, 7 and 8. In addition, since the system wiring 10K, which carries AC current from system K to the system breaker 3, carries a large current and is therefore thicker (i.e., less likely to bend) than the other wiring 10, the distance between the wall surface on the side where the system breaker 3 is provided (e.g., one end side in the left-right direction) inside the panel box 2 and the system breaker 3 may be made longer than the distance between the wall surface on the side where the switching device 4 is provided (e.g., the other end side in the left-right direction) and the switching device 4. Furthermore, when the panel box body 2 (switching panel 1) is installed on the outer wall of a building, etc., the longitudinal direction 2L of the panel box body 2 will be approximately along the horizontal direction. Here, "the longitudinal direction 2L of the panel box body 2 will be approximately along the horizontal direction" does not only mean that the longitudinal direction 2L of the panel box body 2 is along the horizontal direction (which can also be said to be the left-right direction), but also means that the longitudinal direction 2L of the panel box body 2 is slightly inclined to the horizontal direction (for example, the angle between the longitudinal direction 2L of the panel box body 2 and the horizontal direction is greater than 0° and less than 5°, preferably less than 3°, and more preferably less than 1°).

[0019] The panel box 2 may be provided with an openable door 2a on the front side, that is, the side of the panel box 2 with the door 2a is the front side, and the opposite side (the rear side of the main body 2c of the panel box 2) is the rear side. Considering the front-to-rear direction of the panel box 2, for example, the side of the panel box 2 itself where the system breaker 3 and the branch breaker 5 are located is the left side, and the side where the switching device 4 and the like are located is the right side (see Figures 1, 2, 7, and 8). The door 2a of the panel box 2 may be detachable from the main body 2c of the panel box 2, and the door 2a may open horizontally as shown in Figures 5 and 8, but may also open like a double door (where multiple doors 2a are provided for one panel box 2 and the multiple doors 2a open to the left and right) or vertically (where the door 2a opens upward). Additionally, the panel box 2 may have a eaves portion 2d whose upper surface protrudes forward. The shape of the panel box 2 may be an approximately rectangular parallelepiped or an approximately cubic shape, and its size is not particularly limited, but the left-right length (width) may be, for example, a lower limit of 200 mm or more, preferably 300 mm or more, and more preferably 400 mm or more, and an upper limit of 1100 mm or less, preferably 900 mm or less, and more preferably 700 mm or less (506 mm or 516 mm, etc.), the top-bottom length (height) may be, for example, a lower limit of 200 mm or more, preferably 300 mm or more, and more preferably 350 mm or more, and an upper limit of 1000 mm or less, preferably 800 mm or less, and more preferably 600 mm or less (409 mm, etc.), and the front-back length (depth, depth) may be, for example, a lower limit of 100 mm or more, preferably 130 mm or more, and more preferably 160 mm or more, and an upper limit of 300 mm or less, preferably 260 mm or less, and more preferably 230 mm or less (195 mm, etc.).

[0020] <System breaker 3> As shown in FIGS. 1 to 4 and 6 to 8 , the system breaker 3 is a device provided in the above-mentioned panel box 2, and is a breaker (circuit breaker) capable of interrupting AC current from the system K outside the panel box 2. The system breaker 3 receives an AC current from the system K from one side in the left-right direction (which can also be said to be the horizontal direction) and outputs an AC current from the system K from the other side. Specifically, AC current from system K is input from the left side of system breaker 3 (the right side when viewed from the front in Figure 1, etc.) and AC current from system K is output from the right side (the left side when viewed from the front in Figure 1, etc.), or AC current from system K is input from the right side of system breaker 3 and AC current from system K is output from the left side. It can also be said that one side of the system breaker 3 in the left-right direction is the primary side and the other side in the left-right direction is the secondary side, and system wiring 10K that flows AC current from system K is connected to the primary side terminal (so-called input terminal 3Ta), and connection wiring 10C that flows AC current from system K to switching device 4 described below and branch connection wiring 10C' that branches from this connection wiring 10C and flows to branch breaker 5 are connected to the secondary side terminal (so-called output terminal 3Tb). Furthermore, if the switch panel 1 has a charging breaker 6 described below, charging connection wiring 10C" that flows AC current from system K to the charging breaker 6 is connected to the secondary side terminal of the system breaker 3.

[0021] The system breaker 3 may be, for example, an Earth-Leakage Circuit Breaker (ELCB) or a Molded Case Circuit Breaker (MCCB), but it is preferable that at least one of this system breaker 3 and the branch breaker 5 described below is an earth leakage circuit breaker, and it is even more preferable that all of them are earth leakage circuit breakers. The shape of the system breaker 3 may be approximately rectangular or cubic, and its size is not particularly limited, but the vertical length (width) may be smaller than the vertical length of the switching device 4 (particularly the switch 4A) or approximately the same as or larger than the vertical length of the branch breaker 5, etc., and the left-right length (in other words, the longitudinal length) of the system breaker 3 may be smaller than or approximately the same as the left-right length of the switching device 4, or approximately the same as or larger than the left-right length of the branch breaker 5, etc., and the front-to-back length (depth) is smaller than the front-to-back length of the panel box 2 described above.

[0022] The rating of the system breaker 3 may be, for example, an earth leakage circuit breaker, with an ampere trip (AT) lower limit of 30 A or more, preferably 40 A or more, and more preferably 50 A or more, and an upper limit of 200 A or less, preferably 170 A or less, and more preferably 140 A or less (100 A, 60 A, 75 A, etc.), and a rated sensitivity current lower limit of 40 mA or more, preferably 60 mA or more, and more preferably 80 mA or more, and an upper limit of 160 mA or less, preferably 140 mA or less, and more preferably 120 mA or less (100 mA, etc.); and, for a molded-case circuit breaker, with an ampere trip lower limit of 30 A or more, preferably 40 A or more, and more preferably 50 A or more, and an upper limit of 150 A or less, preferably 120 A or less, and more preferably 90 A or less (60 A or 75 A, etc.). Here, if the system breaker 3 is a ground fault circuit interrupter, by setting the rated sensitivity current to the above-mentioned value, it can be said that even if a ground fault circuit interrupter with a rated sensitivity current of a specified value (such as 30 mA) is installed inside the indoor distribution board, it can cooperate with that ground fault circuit interrupter. In addition, in Figures 1, 2, 7 and 8, the system breaker 3 receives AC current from system K at its left side (the right side when viewed from the front in Figure 1, etc.) and outputs it from the right side (the left side when viewed from the front in Figure 1, etc.). However, as described above, if the system breaker 3, branch breaker 5 and switching device 4 are installed on the left and right sides inside the panel box body 2 in the reversed left and right positions compared to Figures 1, 2, 7 and 8, the system breaker 3 may receive AC current from system K at its right side and output it from the left side.

[0023] <Switching device 4> As shown in Figures 1 to 4 and 6 to 8, the switching device 4 is a device that can switch whether to flow AC current from the system K via the above-mentioned system breaker 3 or AC current from the independent power source D outside the above-mentioned panel box body 2 outside the panel box body 2. The switching device 4 receives AC current from the system K via the system breaker 3 from one side in the left-right direction (which can also be said to be the horizontal direction), and outputs AC current from the system K or the independent power source D to the outside of the panel box 2 from the other side. Specifically, AC current from system K is input from the left side of the switching device 4 (the right side when viewed from the front in Figure 1, etc.) and AC current from system K or independent power source D is output from the right side (the left side when viewed from the front in Figure 1, etc.), or AC current from system K is input from the right side of the switching device 4 and AC current from system K or independent power source D is output from the left side.

[0024] In contrast, the point at which the AC current from the independent power source D is input to the switching device 4 is not particularly limited, and for example, the AC current from the independent power source D may be input from one side (such as the lower side) of the switching device 4 in the vertical direction, or from one or the other side of the switching device 4 in the left-right direction, or the AC current from the independent power source D may be input from a midway point in the left-right direction of the switching device 4 and from the side closer to the front of the panel box 2 (the near side, so to speak). Furthermore, the switching device 4 (particularly the switch 4A described later) has a connection wiring 10C that carries AC current from the system K via the system breaker 3 connected to at least one terminal on the left or right side (a system input terminal 4Ta described later), and an output wiring 10S that carries AC current from the switching device 4 to the outside of the panel box 2 connected to the other terminal (an output terminal 4Tc described later). Furthermore, the switching device 4 (particularly the sequencer 4B' including the independent relay 4B described later) may have a power supply wiring 10D that carries AC current from an independent power source D connected to a terminal (an independent input terminal (strictly speaking, an independent sequencer input terminal) 4Tb' described later) on one side (lower side) in the vertical direction, for example. The switching device 4 described above may include a selector 4A, an independent relay 4B, and a sequencer 4B', which will be described later.

[0025] <Switch 4A> As shown in Figures 1 to 4 and 6 to 8, the switch 4A is a device that incorporates a system coil 4a that is excited when AC current from the system K via the above-mentioned system breaker 3 is caused to flow outside the panel box 2, and an independent coil 4b that is excited when AC current from the independent power source D is caused to flow outside the panel box 2 (i.e., the system coil 4a and the independent coil 4b are provided within the switching housing 4A'). In addition, the switch 4A does not need to have a built-in relay that excites the system coil 4a when AC current is input from system K (more specifically, when AC voltage from system K is applied, or when system K is energized or under normal conditions). The switch 4A may incorporate a silicon rectifier (not shown) or a surge absorber (not shown) for each of the coils 4a and 4b described above, and may also incorporate a fuse (not shown). As shown in FIG. 8, the system coil 4a may be connected to the system input terminal 4Ta side (the branch wiring 10B and the connection wiring 10C through which the AC current from the system K flows) to which the AC current from the system K is input, and the independent coil 4b may be connected to the independent input terminal (strictly speaking, an independent switching input terminal) 4Tb side to which the AC current from the independent power source D is input. The location where these two input terminals 4Ta, 4Tb are provided in the switching housing 4A' is not particularly limited, but for example, the two input terminals 4Ta, 4Tb may be provided so as to overlap in the front-to-back direction on one side in the left-to-right direction of the switch 4A (switching housing 4A') (in Figures 1 and 2, the independent switching input terminal 4Tb is hidden behind the system input terminal 4Ta).

[0026] The switch 4A may be manually switched by inserting a plug-in manual handle (not shown) into the manual handle hole 4c of the switching housing 4A' to switch whether the AC current from the system K via the system breaker 3 or the AC current from the independent power source D outside the panel box 2 is to flow outside the panel box 2. 1, 2, 7 and 8, the side of the switch 4A where AC current is input from the system K or the independent power source D is on the left side (the right side when viewed from the front in Fig. 1 etc.) and the side where AC current from the system K or the independent power source D is output is on the right side (the left side when viewed from the front in Fig. 1 etc.), but the opposite may be true, where the side where AC current is input from the system K or the independent power source D is on the right side and the side where AC current from the system K or the independent power source D is output is on the left side. The switch 4A may have a fixed upside down. The switch 4A may output power for the monitoring device 11, which will be described later. In this case, monitoring is possible even during a power outage in the system K. The monitoring output terminal 4Td of the power supply for the monitoring device 11 may be used in combination with the output terminal 4Tc of the AC current from the system K or the independent power supply D, or may be provided separately at a midpoint in the left-right direction and on the front side of the switch 4A. A fuse 4d for the monitoring device 11 (such as a temperature fuse with a rated current of 3A) may be provided in the middle of the monitoring wiring 10M from the monitoring output terminal 4Td of the power supply for the monitoring device 11. Also, the mounting portion 4e of the switch 4A to the panel box 2 may also serve as a ground.

[0027] The shape of the switch 4A may be a substantially rectangular parallelepiped or cubic shape as a whole, and the configuration of the switch 4A may include, for example, a substantially rectangular parallelepiped or cubic part (terminal part) on one side (upper side, etc.) in the vertical direction where the input terminals 4Ta, 4Tb and the output terminal 4Tc are arranged, and a substantially rectangular parallelepiped or cubic part (coil part) on the other side (lower side, etc.) in the vertical direction where the coils 4a, 4b are built in. Note that, on the lower side of the coil part, etc., a sequencer terminal 4Tea on the side controlling the system coil 4a and a sequencer terminal 4Teb on the side controlling the independent coil 4b may be provided as a sequencer terminal for controlling a sequencer 4B' including an independent relay 4B described later. The size of the switch 4A is not particularly limited, but the vertical length (width) may be greater than or approximately the same as the vertical length of each breaker 3, 5, and the left-right length of the switch 4A (in other words, the longitudinal length) may be greater than or approximately the same as the left-right length of each breaker 3, 5, and the front-to-back length (depth) is smaller than the front-to-back length of the panel box body 2 described above.

[0028] The rating of the switch 4A may be, for example, a lower limit of 40 A or more, preferably 60 A or more, and more preferably 80 A or more, and an upper limit of 200 A or less, preferably 160 A or less, and more preferably 130 A or less (eg, 100 A). In addition, in Figures 1, 2, 7 and 8, the switch 4A receives AC current from the system K or the independent power source D from its left side (the right side when viewed from the front in Figure 1, etc.) and outputs it from the right side (the left side when viewed from the front in Figure 1, etc.). However, as described above, if the system breaker 3 and branch breaker 5 and the switching device 4 (switch 4A, etc.) are installed on the left and right sides inside the panel box 2 in the reversed left and right positions compared to Figures 1, 2, 7 and 8, the switch 4A may receive AC current from the system K or the independent power source D from its right side and output it from the left side.

[0029] <Stand-alone relay 4B, sequencer 4B', etc.> As shown in Figures 1 to 4 and 6 to 8, the independent relay 4B is a device that excites the above-mentioned independent coil 4b when an AC current from the independent power source D is input to the switching device 4 (more specifically, when a voltage of the AC current from the independent power source D is applied, or in other words, when a power outage occurs in the system K). The independent relay 4B is arranged within the panel box 2, outside the switching housing 4A' of the switch 4A described above, and is arranged rearward of the system breaker 3 and the branch breaker 5 described later (and when viewed from the front, the independent relay 4B is arranged in a position overlapping with the system breaker 3 and the branch breaker 5). Such an independent relay 4B is connected to the independent input terminal (independent sequencer input terminal) 4Tb' or the independent switching input terminal 4Tb (or between them), and is also connected to the sequencer terminal 4Teb on the control side of the above-mentioned independent coil 4b.In other words, the independent coil 4b is connected to the independent sequencer input terminal 4Tb' via the independent relay 4B. The independent relay 4B described above can also be said to be included in a sequencer 4B', which will be described later.

[0030] As shown in Figures 1 to 4 and 6 to 8, the sequencer 4B' is a device (circuit) that automatically progresses sequentially through each stage of switching control, and specific switching control stages are, for example, a stage of "keeping the system coil 4a excited when outputting AC current from the system K to the outside of the panel box 2" and a stage of "exciting the independent coil 4b when outputting AC current from the independent power source D to the outside of the panel box 2." The sequencer 4B' includes (has) the above-mentioned independent relay 4B, and may also have an independent input terminal (independent sequencer input terminal) 4Tb' and a b contact (symbolized as "4f") described below, and may also have sequencer wiring 10Q from the independent sequencer input terminal 4Tb' to the above-mentioned independent switching input terminal 4Tb of the switch 4A, and of these, the independent relay 4B, the b contact 4f, and the sequencer wiring 10Q may be provided within the sequencer housing (not shown). Like the independent relay 4B, the b contact 4f etc. (or the entire sequence controller housing) are arranged within the panel box 2, outside the switching housing 4A' of the switch 4A described above, and are arranged rearward of the system breaker 3 and the branch breaker 5 described later (and when viewed from the front, the b contact 4f and the entire sequence controller housing are positioned so as to overlap with the system breaker 3 and the branch breaker 5). In contrast, the position at which the independent sequencer input terminal 4Tb' is located can be said to be rearward of the system breaker 3 and the branch breaker 5 when viewed from the side, but it may be located so as not to overlap with the system breaker 3 and the branch breaker 5 when viewed from the front. For example, the independent sequencer input terminal 4Tb' may be located on one side (the lower side) in the vertical direction of the switching device 4.

[0031] As shown in Figures 1 to 4 and 6 to 8, the b contact 4f is a contact (NC, Normally Closed) which is closed and current flows under normal conditions, and opens and stops the flow of current when a specified operation is performed. The b contact 4f is connected to the branch connection wiring 10C' described above, and is also connected to the sequencer terminal 4Tea on the control side of the system coil 4a described above. In other words, the system coil 4a is connected to the branch connection wiring 10C' via the b contact 4f. Therefore, the specific operation of the b contact 4f is that in the normal state "when power is supplied to system K", current (AC current from system K) is passed to the system coil 4a so that the system coil 4a is excited, and in the specified operation "when there is a power outage in system K", no current is passed to the system coil 4a so that the system coil 4a is not excited. This type of b-contact 4f not only prevents current from flowing to the system coil 4a "when there is a power outage in system K," but also outputs a signal (a signal indicating that there is a power outage in system K) to the above-mentioned independent relay 4B. When this signal is input, the independent relay 4B passes current (AC current from the independent power source D) to the independent coil 4b, and when the independent coil 4b is excited, the AC current from the independent power source D flows outside the panel box 2 via the switching device 4. Furthermore, when returning from “when system K is powered down” to “when system K is energized”, the manual handle of the switch 4A described above may be used to switch the AC current from system K via the system breaker 3 to flow outside the panel box 2; however, when returning to “when system K is energized”, the b contact 4f again passes current to the system coil 4a so that the system coil 4a is excited, and no longer outputs a signal to the independent relay 4B. Therefore, the independent relay 4B stops passing current to the independent coil 4b, and the independent coil 4b is no longer excited, so that it can be said that the AC current from system K via the system breaker 3 is automatically switched to flow outside the panel box 2. The sequence controller 4B' does not need to include a built-in relay for exciting the system coil 4a when an AC current is input from the system K. In this way, if the switching device 4 (sequencer 4B' or switch 4A) does not have a built-in relay that excites the system coil 4a, the absence of the relay makes the switching device 4 itself and the panel box 2 more compact, and since power outages in the system K rarely occur, if a relay that excites the system coil 4a is built in, current would flow to excite the system coil 4a almost all the time. However, since such a relay that excites the system coil 4a is not built in, no current flows all the time, and power consumption can be reduced.

[0032] <Branch breaker 5> As shown in Figures 1 to 4 and 6 to 8, the branch breaker 5 is a device provided within the panel box body 2 described above, and is a breaker (circuit breaker) capable of blocking the flow of AC current from the system K branched between the system breaker 3 and the switching device 4 to the independent power source D. The branch breaker 5 is different from the system breaker 3 and the switch 4A described above in that AC current from system K is input from the other side in the left-right direction (which can also be said to be the horizontal direction) of the branch breaker 5, and AC current from system K is output from one side of the branch breaker 5. Specifically, AC current from system K is input from the right side of branch breaker 5 (the left side when viewed from the front in Figure 1, etc.) and AC current from system K is output from the left side (the right side when viewed from the front in Figure 1, etc.), or AC current from system K is input from the left side of branch breaker 5 and AC current from system K is output from the right side. The branch breaker 5 can also be said to have a primary side on the other side in the left-right direction and a secondary side on one side in the left-right direction, and a branch connection wiring 10C' for passing AC current from the system K via the system breaker 3 is connected to a terminal on the primary side (so-called an input terminal 5Ta), and a branch wiring 10B for passing AC current from the system K via the branch breaker 5 to the independent power source D outside the panel box 2 is connected to a terminal on the secondary side (so-called an output terminal 5Tb). The branch breaker 5 can also be said to be a breaker that cuts off AC current from the system K to protect the independent power source D and the system K side when a ground fault or short circuit occurs in the independent power source D and a large current flows from the system K side to the independent power source D side.

[0033] The branch breaker 5 may also be, for example, an Earth-Leakage Circuit Breaker (ELCB) or a Molded Case Circuit Breaker (MCCB), but as described above, it is preferable that at least one of this branch breaker 5 and the above-mentioned system breaker 3 is an earth leakage circuit breaker, and it is even more preferable that both are earth leakage circuit breakers. The shape of the branch breaker 5 may also be approximately rectangular or cubic, and its size is not particularly limited, but the vertical length (width) may be smaller than the vertical length of the switching device 4 (particularly the switch 4A), or approximately the same as or smaller than the vertical length of the system breaker 3, etc., and the left-right length of the branch breaker 5 (in other words, the longitudinal length) may be smaller than or approximately the same as the left-right length of the switching device 4, or approximately the same as or smaller than the left-right length of the system breaker 3, etc., and the front-to-back length (depth) is smaller than the front-to-back length of the panel box 2 described above.

[0034] The rating of the branch breaker 5 may be, for example, an earth leakage circuit breaker, with an ampere trip (AT) lower limit of 10 A or more, preferably 20 A or more, and more preferably 30 A or more, and an upper limit of 90 A or less, preferably 70 A or less, and more preferably 50 A or less (e.g., 32 A or 40 A), and a rated sensitivity current lower limit of 15 mA or more, preferably 20 mA or more, and more preferably 25 mA or more, and an upper limit of 60 mA or less, preferably 50 mA or less, and more preferably 40 mA or less (e.g., 30 mA); and if it is a molded-case circuit breaker, with an ampere trip lower limit of 10 A or more, preferably 20 A or more, and more preferably 30 A or more, and an upper limit of 90 A or less, preferably 70 A or less, and more preferably 50 A or less (e.g., 32 A or 40 A). Here, if the branch breaker 5 is a ground fault circuit interrupter, by setting the rated sensitivity current to the above-mentioned value, it can be said that even if a ground fault circuit interrupter with a rated sensitivity current of a specified value (such as 30 mA) is installed inside the indoor distribution board, it can cooperate with that ground fault circuit interrupter. In addition, in Figures 1, 2, 7 and 8, the branch breaker 5 has AC current from system K input from its right side (the left side when viewed from the front in Figure 1, etc.) and outputs it from its left side (the right side when viewed from the front in Figure 1, etc.), but as described above, if the branch breaker 5, system breaker 3 and switching device 4 are installed on the left and right sides inside the panel box 2 in the reversed position to that in Figures 1, 2, 7 and 8, the branch breaker 5 may have AC current from system K input from its left side and output it from its right side.

[0035] <Charging breaker 6> As shown in Figures 1 to 4 and 6 to 8, the charging breaker 6 is a device provided within the panel box 2 described above, and is a breaker (circuit breaker) capable of blocking the flow of AC current from the system K via the system breaker 3 to the charger J. Contrary to the system breaker 3 and the switch 4A described above, charging breaker 6 receives AC current from system K from the other side in the left-right direction (which can also be said to be the horizontal direction) and outputs AC current from system K from one side. Specifically, AC current from system K is input from the right side of charging breaker 6 (the left side when viewed from the front in Figure 1, etc.) and AC current from system K is output from the left side (the right side when viewed from the front in Figure 1, etc.), or AC current from system K is input from the left side of charging breaker 6 and AC current from system K is output from the right side. In addition, the charging breaker 6 can also be said to have a primary side on the other left-right side and a secondary side on one left-right side, and a charging connection wiring 10C" that flows AC current from the system K via the system breaker 3 is connected to the primary side terminal (i.e., input terminal 6Ta, so to speak) (as shown in Figures 1, 2, 7, 8 and 6, the charging breaker 6 differs from the above-mentioned system breaker 3 and branch breaker 5 in that only two of the three wires in the system breaker 3 (i.e., single-phase two wires) are connected, and therefore the charging connection wiring 10C" also has two wires) and a secondary side terminal (i.e., output terminal 6Tb, so to speak) is connected to a charging wiring 10J that flows AC current from the system K via the charging breaker 6 to a charger J outside the panel box 2.

[0036] The charging breaker 6 may be, for example, an Earth-Leakage Circuit Breaker (ELCB) or a Molded Case Circuit Breaker (MCCB), but as described above, it is preferable that at least one of the charging breaker 6 and the system breaker 3 and branch breaker 5 described above be an earth leakage circuit breaker, and it is even more preferable that all of them are earth leakage circuit breakers. The shape of the charging breaker 6 may also be approximately rectangular or cubic, and its size is not particularly limited, but the vertical length (width) may be smaller than the vertical length of the switching device 4 (particularly the switch 4A), or approximately the same as or smaller than the vertical length of the system breaker 3, etc., and further, the left-right length of the charging breaker 65 (in other words, the longitudinal length) may be smaller than or approximately the same as the left-right length of the switching device 4, or approximately the same as or smaller than the left-right length of the system breaker 3, etc., and the front-to-back length (depth) is smaller than the front-to-back length of the panel box 2 described above.

[0037] The rating of the charging breaker 6 may be, for example, if it is a ground fault circuit interrupter, the ampere trip (AT) may have a lower limit of 5 A or more, preferably 10 A or more, and more preferably 15 A or more, and an upper limit of 90 A or less, preferably 70 A or less, and more preferably 50 A or less (e.g., 24 A); the rated sensitivity current may have a lower limit of 15 mA or more, preferably 20 mA or more, and more preferably 25 mA or more, and an upper limit of 60 mA or less, preferably 50 mA or less, and more preferably 40 mA or less (e.g., 30 mA); if it is a wiring circuit breaker, the ampere trip may have a lower limit of 5 A or more, preferably 10 A or more, and more preferably 15 A or more, and an upper limit of 90 A or less, preferably 70 A or less, and more preferably 50 A or less (e.g., 24 A). Here, if charging breaker 65 is a ground fault circuit interrupter, by setting the rated sensitivity current to the above-mentioned value, it can be said that even if a ground fault circuit interrupter with a rated sensitivity current of a specified value (such as 30 mA) is installed inside the indoor distribution board, it can cooperate with that ground fault circuit interrupter. In addition, in Figures 1, 2, 7 and 8, the charging breaker 6 has AC current from system K input from its right side (the left side when viewed from the front in Figure 1, etc.) and outputs it from its left side (the right side when viewed from the front in Figure 1, etc.), but as described above, if the charging breaker 6, branch breaker 5, system breaker 3, and switching device 4 are installed on the left and right sides inside the panel box 2 in the reversed position to that in Figures 1, 2, 7 and 8, the charging breaker 6 may have AC current from system K input from its left side and output from its right side.

[0038] <Wiring 10> As shown in Figures 1 to 4 and 6 to 8, the wiring 10 is an electrical circuit that provides electrical continuity between the above-mentioned devices 3, 4, 5, etc., and between the system K, the independent power source D, and the charger J, and may be in the form of a cable, a rod, or a plate (bar), and its material includes, for example, conductors such as copper, aluminum, silver, gold, nichrome, etc., cables in which such conductors are covered with an insulator, general electric wires, etc. Of the wiring 10, the system wiring 10K for passing AC current from the system K to the above-mentioned system breaker 3, the connection wiring 10C for passing AC current from the system K between the system breaker 3 and the switching device 4, and the output wiring 10S for passing AC current from the system K or the independent power source D from the switching device 4 to an indoor distribution board or the like may be made of relatively thick wiring (thick cable). The diameter of the thick wiring may be, for example, 10 mm 2 More than 13mm, preferably 2 More preferably, 20 mm 2 or higher, or the upper limit is 120 mm 2 Less than 100mm, preferably 2 Less than 60mm, more preferably 2 Less than (22sq (square mm, mm 2 ) etc.) are also acceptable. Incidentally, the connection wiring 10C between the system breaker 3 and the switching device 4 may be in a bar shape (a joint bar or a lead bar) instead of a cable shape.

[0039] Furthermore, among the wiring 10, the branch connection wiring 10C' that passes current from the system breaker 3 to the branch breaker 5, the branch wiring 10B that passes current from the branch breaker 5 to the independent power source D, the power supply wiring 10D that passes current from the independent power source D to the switching device 4, the charging connection wiring 10C'' that passes current from the system breaker 3 to the charging breaker 6, the charging wiring 10J that passes current from the charging breaker 6 to the charger J, etc. may be made of relatively thin wiring (thin cables), and the diameter of the thin wiring may be, for example, 1 mm 2 More than 2mm, preferably 2 More preferably, 3 mm 2 or more, or the upper limit is 10.0 mm 2 Smaller, preferably 8.5mm 2Less than 6.0 mm, more preferably 2 It is acceptable if it is less than this (e.g. 5.5sq). In addition, among the wires 10, the monitoring wire 10M from the monitoring output terminal 4Td for the power supply of the monitoring device 11, the sequencer wire 10Q, and the like may be thinner wires (ultra-thin cables). The lower limit of the diameter of the thinner wires is, for example, 0.01 mm. 2 More than 0.05mm, preferably 0.05mm 2 More preferably, 0.10 mm 2 or more, or the upper limit is 1.00 mm 2 Smaller, preferably 0.90mm 2 Less than 0.80 mm, more preferably 0.80 mm 2 It is acceptable if it is less than this (e.g. 0.75sq).

[0040] Of the wiring 10 described so far, the system wiring 10K hangs down (hangs down) on one side of the left-right direction within the panel box 2, from one side of the left-right direction of the system breaker 3 to the outside of the panel box 2, and similarly, the branch wiring 10B hangs down from one side of the left-right direction of the branch breaker 5 to the outside of the panel box 2. In contrast to this, the output wiring 10S hangs down on the other side in the left-right direction within the panel box 2 from the other side in the left-right direction of the switching device 4 to the outside of the panel box 2. Furthermore, charging wiring 10J may hang down from one side in the left-right direction within panel box 2 to the outside of panel box 2 from one side in the left-right direction of charging breaker 6. Alternatively, the power supply wiring 10D may hang down from the independent sequencer input terminal 4Tb' on one side (such as the lower side) of the switching device 4 in the vertical direction within the panel box 2 to the outside of the panel box 2. Hanging down in this case may mean hanging down substantially straight from the independent sequencer input terminal 4Tb' to the outside of the panel box 2, but may also be bent, for example, midway in the vertical direction depending on the position of the insertion hole for the wiring 10 on the lower side of the panel box 2 (see FIGS. 1, 2, 7, and 8). In this way, since the wirings 10K, 10B, 10S, etc. hang down, the wiring space 2b can be reduced as much as possible, and an adapter (not shown) of the monitoring device 11, which will be described later, can be placed in the vacant space 2e in the panel box 2, making it possible to effectively utilize the space inside the panel. At the same time, since the wirings 10K, 10B, 10S, etc. hang down and extend from the lower side of the panel box 2 to the inside and outside of the panel box 2, it is possible to prevent rainwater, etc. from entering the inside of the panel box 2.

[0041] <Monitoring device 11, current transformer 12, etc.> As shown in Figures 7 and 8, the monitoring device 11 is a device that monitors the amount of electricity from the system K (such as the amount of electricity purchased and sold) and also monitors other information about the independent power source D (such as the amount of electricity generated, solar radiation intensity, temperature, and the state of the power generation system).The specific configuration of the monitoring device 11 is not particularly limited, and may be, for example, a smart logger, a sequencer, a computer, etc. The monitoring device 11 may monitor the amount of power from the system K and information regarding the independent power source D based on the output from an instrument current transformer (CT) 12 installed in the system wiring 10K that passes AC current from the system K to the system breaker 3. In addition, the monitoring device 11 may control a conversion unit D1 in an independent power source D described later, and may include a digital multi-relay (such as one having the functions of a reverse power relay (RPR) or an overvoltage ground relay (OVGR)). The shape of the monitoring housing 11a of the monitoring device 11 may be a substantially rectangular parallelepiped or a substantially cubic shape (for example, a thick plate shape), and the size is not particularly limited, but the left-right length (width) may have a lower limit of, for example, 160 mm or more, preferably 180 mm or more, and more preferably 200 mm or more, and an upper limit of, for example, 350 mm or less, preferably 300 mm or less, and more preferably 250 mm or less (225 mm, etc.), and the top-bottom length (height) may have a lower limit of, for example, 100 The width may be, for example, 150 mm or more, preferably 120 mm or more, and more preferably 140 mm or more, and the upper limit may be 300 mm or less, preferably 250 mm or less, and more preferably 200 mm or less (e.g., 160 mm). The front-to-back length (depth, length) may be, for example, 20 mm or more, preferably 30 mm or more, and more preferably 40 mm or more, and the upper limit may be 110 mm or less, preferably 90 mm or less, and more preferably 70 mm or less (e.g., 44 mm). Such a monitoring device 11 may be arranged in any position within the above-mentioned panel box 2, but may, for example, be arranged forward of the above-mentioned switching device 4 and output wiring 10S (and in a position that overlaps with the switching device 4 and output wiring 10S when viewed from the front), in which case the monitoring device 11 may be fixed to the panel box 2 by a specified fixing device or the like. In this manner, by arranging the monitoring device 11, the space inside the panel in front of the switching device 4 and the output wiring 10S can be effectively utilized (in other words, the space inside the panel in the front-to-back direction (depth direction) can be effectively utilized), and since the monitoring device 11 is arranged at the front side within the panel box body 2, wiring to the monitoring device 11 can be easily performed.

[0042] <Other> The present invention is not limited to the above-described embodiment. Each component of the switch panel 1 and the like, or the overall structure, shape, dimensions, etc., can be appropriately changed in accordance with the spirit of the present invention. As described above, the switchboard 1 can be said to simplify the installation of outdoor wiring (outdoor cables) and reduce installation (construction) costs because the devices and equipment 3, 4, 5, etc. are housed integrally in one panel box 2. Also, the switchboard 1 can be said to be capable of handling all loads due to the ratings of the devices and equipment 3, 4, 5, etc., and can be said to eliminate the need to isolate specific loads during a power outage in system K, etc. The switch panel 1 does not need to have the charging breaker 6 or the charging wiring 10J. The switching panel 1 may not have a monitoring device 11 or an instrument current transformer 12, may have only a monitoring device 11, or may have only an instrument current transformer 12, or alternatively, the switching panel 1 may have a monitoring device 11 but be provided outside the panel box 2. Although each of the breakers 3, 5, and 6 may generate sparks when cut off, this does not cause any problems if they are arranged within the panel box 2 so that current flows in the left-right direction (horizontally) (for example, AC current is input from one side in the left-right direction and AC current is output from the other side). The switching device 4 (particularly, the switch 4A) may also include a built-in fuse (such as a thermal fuse) for at least one of the coils 4a, 4b. The switching device 4 does not have a separate switch 4A and independent relay 4B, and the independent relay 4B does not have to be provided outside the switching housing 4A' of the switch 4A, and these devices 4A, 4B may be integrated (i.e., the independent relay 4B may be provided within the switching housing 4A'). The switching device 4 (or the switch 4A) may have a relay that excites the system coil 4a when AC current is input from the system K, and this relay may be built into the switching housing 4A' or provided outside the switching housing 4A'. The system K, independent power source D, charger J, etc. related to the switching panel 1 described above will be explained in detail below.

[0043] <System K> As shown in Figure 4, system K, also known as the commercial power system, is a system that integrates power generation, transformation, transmission, and distribution to supply power to consumers' power receiving equipment (indoor distribution boards and each load). System K is three-phase, three-wire (3φ3W) and supplies low voltage such as 100V to 200V, high voltage such as 6000V or 6600V, or extra high voltage such as 22000V, or 60Hz or 50Hz, from a power company substation, etc. Note that single-phase, two-wire (1φ2W) or 1φ3W (single-phase, three-wire) power may also be supplied.

[0044] <Independent power supply D> As shown in Figure 4, independent power source D is a system for supplying power to the power receiving equipment (indoor distribution boards and each load) of consumers via a switching panel 1, a switching device 4A, etc., even during a power outage (emergency) in system K. The independent power source D may be, for example, a solar power generation system including a conversion unit (such as a hybrid power conditioner) D1, a power generation unit D2, a power storage unit D3, a transformer D4, and the like. The conversion unit D1 is a part that converts direct current from a power generation unit D2, such as a solar panel (solar cell), into alternating current, and also controls the flow of current between the power generation unit D2 and the switchboard 1 or storage unit D3, and is also called a power conditioner. The power storage unit D3 may be a fuel cell, a generator that runs on fuel such as gasoline, a power generation system that generates power using a motor (generator) rotated by wind power, wave power (tidal power), hydroelectric power, thermal power, geothermal power, etc., a storage battery for an electric vehicle or a hybrid vehicle, etc. The independent power source D may be the power storage unit D3 itself. The transformer D4 is a device that transforms (steps up or down) the AC current from the conversion unit D1, and is a so-called transformer (TR). Note that "transformer" is an abbreviation of "transformer." The transformer D4 may be provided, for example, in the power supply wiring 10D (i.e., between the conversion unit D1 and the switching device 4) through which the AC current from the independent power source D flows. The transformer D4 is not limited to its configuration. For example, it may be a two-winding transformer, a three-winding transformer, or a transformer with four or more windings. In the case of a two-winding transformer, the primary side of the transformer 4 may be on the conversion unit D1 side, and the secondary side may be on the switching device 4 side. In this case, the specific values of the voltages on the primary and secondary sides of the transformer 4 are not particularly limited. For example, the voltage on the primary side, which is on the conversion unit D1 side, may be 50V or more and 1000V or less, preferably 70V or more and 500V or less, more preferably 100V or more and 300V or less (such as 200V), or the voltage on the secondary side, which is on the switching device 4 side, may be 10V or more and 500V or less, preferably 30V or more and 400V or less, more preferably 50V or more and 300V or less (such as 100 - 200V).

[0045] <Charger J, load J', etc.> As shown in FIG. 4, the charger J is, for example, an installation-type charging device or charging facility used for charging vehicles with built-in batteries (storage batteries) such as electric vehicles (EVs), plug-in hybrid vehicles, and electric two-wheelers, and is also referred to as a charging stand, charging station, charging spot, etc. In this case, the charger J may have any configuration such as a rapid charger, a normal charger, or an ultra-rapid charger. In addition, the charger J may be a charging device or charging facility used for charging communication devices such as smartphones and mobile phones with built-in batteries (storage batteries), portable PCs (personal computers), and electrical products other than vehicles. The charger J may have a converter such as an AC / DC converter that converts an alternating current from the power system K into a direct current, or may have a storage battery that stores the direct current from the above-described storage unit D3, etc. Regarding the load J' including the charger J described so far, it will be described below.

[0046] The load J' is a load (load facility) that consumes an alternating current from the power system K, etc. The load J' may be, for example, an automobile dealership or a gas station, a rental car store (rental agency), the above-mentioned charger J in a factory or workshop, or may include electrical equipment and facilities that use electricity such as electric and electronic devices (general lighting loads such as incandescent lamps, fluorescent lamps, and mercury lamps (lighting fixtures), and general power loads such as air conditioners, motors, and pumps), or it may even include the factory or workshop itself. In addition, load J' may include devices that use electricity, such as electrical and electronic equipment in corporations, organizations, individuals, government offices, and associations, homes, stores, warehouses, garages, car parks, bicycle parking lots, school buildings, auditoriums, gymnasiums, research facilities, hospitals, clinics, inns, hotels, theaters, movie theaters, stadiums, baseball stadiums, etc., or the company offices themselves, or it may include a combination of these. [Industrial Applicability]

[0047] The switching panel of the present invention may be installed later on the exterior wall (outdoors) of a building such as an ordinary house, or may be installed at the time of construction of the building, and can be used in any building such as an office, factory, store, building, condominium, or other facility. [Explanation of symbols]

[0048] 1 Switching board 2-disc box body 2a Panel box door 3-way breaker 4 Switching Device 4A switch 4a System coil 4b Self-supporting coil 4B Self-standing relay 5 Branch Breaker 6 Charging breaker 10K system wiring 10S Output Wiring 10B Branch wiring 10J charging wiring K lineage D Independent power supply J charger

Claims

1. A switching board having a panel box (2) and switching between an AC current from a system (K) outside the panel box (2) and an AC current from an independent power source (D) outside the panel box (2) to be passed outside the panel box (2), Within the panel box (2), there are provided a system breaker (3) capable of cutting off AC current from a system (K) outside the panel box (2), a switching device (4) capable of switching between the AC current from the system (K) via the system breaker (3) and the AC current from an independent power source (D) outside the panel box (2) to be passed outside the panel box (2), and a branch breaker (5) capable of cutting off the AC current from the system (K) branched between the system breaker (3) and the switching device (4) from flowing to the independent power source (D), The panel box body (2) has a longitudinal direction, and the longitudinal direction is a left-right direction, The system breaker (3) receives AC current from the system (K) from one side in the left-right direction and outputs AC current from the system (K) from the other side. The switching device (4) receives AC current from the system (K) via the system breaker (3) from one side in the left-right direction, and outputs AC current from the system (K) or the independent power source (D) from the other side to the outside of the panel box body (2). Conversely, the branch breaker (5) receives AC current from the system (K) via the system breaker (3) from the other side in the left-right direction, and outputs AC current from the system (K) from one side of the branch breaker (5). The switching panel also has system wiring (10K) that passes AC current from a system (K) outside the panel box body (2) to a system breaker (3), output wiring (10S) that passes AC current from the switching device (4) to the outside of the panel box body (2), and branch wiring (10B) that passes AC current from the system (K) via the branch breaker (5) to an independent power source (D) outside the panel box body (2), On one side in the left-right direction within the panel box (2), the system wiring (10K) hangs down from one side in the left-right direction of the system breaker (3) to the outside of the panel box (2), and the branch wiring (10B) hangs down from one side in the left-right direction of the branch breaker (5) to the outside of the panel box (2); A switching panel characterized in that, on the other left-right side within the panel box (2), the output wiring (10S) hangs down from the other left-right side of the switching device (4) to the outside of the panel box (2).

2. The panel box (2) is provided with an openable and closable door (2a) on the front side, The switching device (4) includes a switch (4A) incorporating a system coil (4a) which is excited when AC current from the system (K) via the system breaker (3) is caused to flow outside the panel box body (2) and an independent coil (4b) which is excited when AC current from the independent power source (D) is caused to flow outside the panel box body (2), and an independent relay (4B) which excites the independent coil (4b) when AC current from the independent power source (D) is input to the switching device (4), The switching panel according to claim 1, characterized in that, within the panel box body (2), the independent relay (4B) is arranged outside the switching housing (4A') of the switch (4A) and rearward of the system breaker (3) and / or branch breaker (5).

3. A charging breaker (6) is provided within the panel box (2) and is capable of blocking the flow of AC current from the system (K) via the system breaker (3) to a charger (J) outside the panel box (2). Conversely, the charging breaker (6) also receives AC current from the system (K) via the system breaker (3) from the other side in the left-right direction, and outputs AC current from the system (K) from one side of the charging breaker (6). The switching panel also has a charging wiring (10J) that passes an AC current from the system (K) via the charging breaker (6), A switching panel as described in claim 1 or 2, characterized in that, on one left-right side within the panel box body (2), the charging wiring (10J) hangs down from one left-right side of the charging breaker (6) to the outside of the panel box body (2).

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