Board for power distribution or the like with cable support

Abstract

To realize "a reduction of a risk of disconnection", "an improvement of workability according to an installation place", and the like by erecting vertical support members on one side and the other side with an off-board cable installation space interposed therebetween.SOLUTION: The present invention relates to a board 1 for power distribution or the like, which has vertical support members 4A erected at least on one side and the other side with an out-of-board cable arrangement space 3X, in which cables extending from a board housing 2 to the outside of the board are arranged, interposed therebetween. The board 1 also has a transformer 5, the transformer 5 supports the board housing 2 from below, a lower end of the board housing 2 is located above a lower end of the transformer 5, the out-of-board cable arrangement space 3X exists between the board housing 2 and an installation surface M of the board 1 and on the side of the transformer 5, and the vertical support member 4A stands from a lower part of the transformer 5 and overlaps the board housing 2 in plan view. The board 1 may also include: a cable 3 disposed in the out-of-board cable arrangement space 3X; and a horizontal support member 4B extending from the vertical support member 4A on one side to the vertical support member 4A on the other side, and the cable 3 may be fixed to the horizontal support member 4B.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a panel for use in power distribution or the like, having vertical support members erected on one side and the other side of an external cable routing space in which cables extending from a panel housing to the outside of the panel are routed. [Background technology]

[0002] BACKGROUND ART Conventionally, a distribution board in which external cables are pulled out from the board is known (see Patent Document 1). As shown in paragraph 0003 and Figures 1 and 5 of Patent Document 1, inside this distribution board, the busbar on the power supply side and the contact bushing of the circuit breaker are connected by a connecting wire, the load side connecting wire is connected to the contact bushing, and the load side connecting wire is connected to an external cable via a terminal block, and the external cable is pulled out of the board.

[0003] Conventionally, a distribution board having an external cable has also been known (see Patent Document 2). As shown in the utility model claims and Figures 1 to 6 of Patent Document 2, the cables inside this distribution board are connected to external cables via terminal blocks provided on the external side of the distribution board. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 07-075223 [Patent Document 2] Japanese Utility Model Application Publication No. 57-175508 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the external cable described in Patent Document 1 is simply suspended from the terminal block as shown in Figures 1 and 5 thereof, and the external cable described in Patent Document 2 is also suspended from the terminal block as shown in Figures 1, 3 and 6 thereof, or is arranged directly above the terminal block as shown in Figures 2 and 4 thereof, so the weight of the entire external cable is placed on the connection between the external cable and the terminal block, etc., increasing the risk of disconnection. Furthermore, when the external cables of Patent Documents 1 and 2 are laid above or to the side outside the panel, the position and height at which the external cables are laid vary depending on the installation location of the distribution panel, making it difficult to install them according to the installation location.

[0006] In view of these points, the present invention aims to provide a panel that achieves "reduced risk of cable breakage" and "improved ease of installation depending on the installation location" by erecting vertical support members on one side and the other side of the external cable routing space. [Means for solving the problem]

[0007] The first feature of the panel 1 of the present invention is that it has a panel housing 2, an external cable arrangement space 3X in which cables extending from the panel housing 2 to the outside of the panel are arranged, and at least vertical support members 4A erected on both sides of the external cable arrangement space 3X.

[0008] A second feature of the panel 1 of the present invention is that, in addition to the first feature described above, the panel also has a transformer 5, which supports the panel housing 2 from below, and the lower end of the panel housing 2 is located above the lower end of the transformer 5, the external cable routing space 3X is located between the panel housing 2 and the installation surface M of the panel and to the side of the transformer 5, and the vertical support member 4A stands upright from the bottom of the transformer 5 and overlaps the panel housing 2 in a planar view.

[0009] A third feature of the panel 1 of the present invention is that, in addition to the first or second feature, the panel also has a cable 3 arranged in the external cable arrangement space 3X and a horizontal support member 4B extending from the vertical support member 4A on one side to the vertical support member 4A on the other side, and the cable 3 is fixed to the horizontal support member 4B.

[0010] Due to these features, by erecting the vertical support members 4A on one side and the other side of the external cable arrangement space 3X, unlike Patent Documents 1 and 2, even if the cable 3 to be arranged hangs down from the panel housing 2, by fixing the cable 3 to the vertical support members 4A, etc., the weight of the entire cable 3 is distributed not only at the connection part between the cable 3 and the panel housing 2 but also at the fixing point with the vertical support members 4A, etc., thereby reducing the risk of cable breakage ("reduced risk of cable breakage"). Furthermore, even if the position or height at which the cable 3 is installed varies depending on the installation location of the panel 1, such as when the cable 3 hangs down from the panel housing 2 or is installed directly above or to the side of the panel housing 2, there is a high degree of freedom in fixing the cable 3 to the vertical support member 4A or the horizontal support member 4B described below, etc., improving workability according to the installation location ("Improved workability according to the installation location").

[0011] Furthermore, by positioning the lower end of the transformer 5, which supports the panel housing 2 from below, above the lower end of the panel housing 2, and by locating the external cable routing space 3X between the panel housing 2 and the installation surface M and to the side of the transformer 5, and by overlapping the vertical support member 4A erected from the bottom of the transformer 5 with the panel housing 2 in a plan view, it is possible to "reduce the risk of wire breakage" and "improve workability according to the installation location," while also reducing the installation space and occupied area, and increasing the number of places where the panel 1 can be installed afterwards.

[0012] Furthermore, by fixing the cable 3 to the horizontal support member 4B that spans from one side of the vertical support member 4A to the other side, it is possible to further "reduce the risk of cable breakage" and "improve workability according to the installation location." [Effects of the Invention]

[0013] According to the panel of the present invention, by erecting vertical support members on one side and the other side of the external cable routing space, it is possible to achieve "reduced risk of cable breakage" and "improved ease of installation depending on the installation location." [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 2 is a side view showing a board according to the present invention. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] 2 is a view taken along the arrow AA in FIG. 1, and is a bottom view showing the bottom plate of the panel housing of the panel. [Figure 5] FIG. 10 is a side view showing a modified example of the board. [Figure 6] 5, and is a bottom view showing the bottom plate of a panel housing in a modified panel. FIG. [Figure 7] 10 is a photograph in place of a drawing illustrating a front view of a vertical support member, etc., on a board. [Figure 8] 10 is a photograph in place of a drawing illustrating a front perspective view of a vertical support member, etc., on a panel. [Figure 9] 1 is a photograph in place of a drawing illustrating an enlarged front perspective view of a vertical support member, etc., on a panel. [Figure 10] 1 is a photograph used as a drawing illustrating a general front view of the entire panel. [Figure 11] 10 is a photograph in place of a drawing illustrating cables, vertical support members, horizontal support members, etc. on the back of the panel. [Figure 12] 10 is a photograph in place of a drawing illustrating a front perspective view of a duct-shaped lateral support member on the front side of the panel. [Figure 13] FIG. 10 is a side view showing another embodiment of the panel housing and transformer in the panel according to the present invention. [Figure 14] 1 is a schematic diagram illustrating an example of a power distribution system including a power distribution panel. [Figure 15] 1 is a schematic diagram showing an example of a power distribution system including a power distribution panel. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. <Panel 1> 1 to 15 show a panel 1 according to the present invention. This panel 1 has a panel housing 2, an external cable routing space 3X, and a vertical support member 4A. The panel 1 may include a cable 3, which will be described later, a horizontal support member 4B, which will be described later, and a transformer 5, which will be described later. In addition, in the present invention, the panel 1 may be used for any purpose, such as for power distribution (i.e., a distribution panel), for power reception and distribution (i.e., a power reception and distribution panel), or for power reception (i.e., a power receiving panel). In the following, Panel 1 will be described as a power distribution panel (switchboard).

[0016] The place where the panel 1 is installed (installation location) is not particularly limited, and may be, for example, within the premises of a solar power plant, outdoors such as in a store, or indoors such as in a factory. The installation surface M at the installation location of the panel 1 may be approximately horizontal or inclined, and the surface of the installation surface M may be approximately flat or uneven. Alternatively, the panel 1 may be installed on a mat foundation G (see Figure 10) made of concrete or the like and having a uniform thickness, or on a footing with a recess or the like to form a space below the panel 1, or on a plurality of pile members driven into the installation surface M. Furthermore, if the foundation of the panel 1 is pile members, it can also be said that construction costs can be reduced.

[0017] Here, the current, voltage, power, and capacity in the present invention may be values within a rated range, in which case they can be referred to as rated current, rated voltage, rated power, and rated capacity. These rated currents, etc. can also be referred to as limit values of current, etc. guaranteed by manufacturers to ensure the safe use of electrical appliances, and further, ratings can also be referred to as usage limits or conditions that guarantee the safe and proper operation of devices (electrical and electronic devices) and equipment. When the current in the present invention is an AC current, the current value (current value), voltage value (voltage value), power value (power value), and capacitance value (capacity value) may be effective values. In addition, the term "cable" in this invention refers to a device that carries electricity (current) and is made of a conductor such as copper, aluminum, silver, gold, or nichrome covered with an insulator, and includes general electric wires, and is also called an electric circuit.

[0018] <Disc Cabinet 2> As shown in FIGS. 1 to 6, 8 to 10, 12, and 13, the panel housing 2 is a part of the above-mentioned panel 1, and a cable 3, which will be described later, extends from the panel housing 2. The panel housing 2 may be supported from below by the transformer 5 described later, with its lower end positioned above the lower end of the transformer 5, and the cable 3 may extend from the underside of the panel housing 2, with the panel housing 2 overlapping the vertical support member 4A described later in a plan view. The shape of the panel housing 2 is not particularly limited, but may be formed, for example, into a substantially rectangular parallelepiped or cubic shape as a whole, and is also called a cubicle. In the following description, the panel housing 2 will be mainly described as having a substantially rectangular parallelepiped shape.

[0019] The panel housing 2 may have one or more doors 2a that can be opened and closed. The doors 2a may be provided on the front and / or rear side of the panel housing 2. In this case, it can be said that wiring work inside the panel housing 2 can be performed from the front or rear when installing the panel 1. The doors 2a may also be provided with door handles. The panel housing 2 (main body 2c) may have areas where the doors 2a are not provided (areas that do not open and close), such as the side of the high-voltage terminal (high-voltage output terminal) of the transformer 5 described below. The side panels of these areas that do not open and close may be hinged panels, bolted panels, or the like, to make wiring work, etc. easier when installing the panel 1. The panel housing 2 may have a roof 2b and a main body 2c, and the roof 2b may be provided on top of the main body 2c, with the top surface of the roof 2b inclined backward (sloping downward). The panel housing 2 may have an exhaust port 2d, and the exhaust port 2d may be equipped with a filter (not shown), or the opening of the exhaust port 2d may be covered with a mesh member that separates the inside and outside of the panel housing 2. There are no particular limitations on the location where the exhaust port 2d is provided, but for example, if the roof 2b protrudes forward and / or backward from the main body 2c, the exhaust port 2d may be provided on the protruding underside of the roof 2b, or may be provided anywhere on the upper part of the panel housing 2. The panel housing 2 may have a louver (not shown) and may be equipped with a filter. There are no particular limitations on the location where the louver is provided, but it may be provided, for example, at the lower left and / or right side of the main body 2c and approximately in the center in the front-to-rear direction.

[0020] 4, 6, 8, and 9, the bottom plate 2e of the main body 2c of the panel housing 2 may have a transformer mounting portion attached to the upper surface of a transformer 5 (described later), one or more low-voltage openings 2eL for inserting a low-voltage cable (low-voltage circuit) 3L (described later) through which a low-voltage AC current L flows from outside the panel housing 2, one or more high-voltage openings 2eH for inserting a high-voltage cable (high-voltage circuit) 3H (described later) through which a high-voltage AC current H flows to outside the panel housing 2, one or more grounding openings 2eS for inserting a grounding cable 3S of the transformer 5 to outside the panel housing 2, and one or more control openings 2eC for inserting a control cable 3C from a control device 30 of a conversion unit 12 (described later) outside the panel housing 2. The control openings 2eC may be located outside a pair of vertical support members 4A (described later) in a plan view. Furthermore, when the panel housing 2 is longer in front-to-rear length than the transformer 5 in a plan view by a predetermined length and the panel housing 2 protrudes forward and / or rearward from the transformer 5, the bottom plate 2e may have a high-voltage opening 2eH, a low-voltage opening 2eL, a grounding opening 2eS, a control opening 2eC, etc. provided on the underside of this protruding portion. Furthermore, the bottom plate 2e may have holes formed therein for inserting low-voltage input terminals (not shown) and high-voltage output terminals (not shown) that protrude (are erected) upward from the upper surface of the transformer 5, and in this case, the insertion holes will be located in the transformer mounting portion described above when viewed in a plane. Additionally, a heat insulating material (not shown) for blocking heat from the transformer 5 may be provided on the bottom plate 2e.

[0021] The equipment and devices provided inside the panel housing 2 are not particularly limited, but may include at least one of the following: a portion of the cables 3 (low-voltage cable 3L, high-voltage cable 3H) described later; circuit breakers (such as low-voltage circuit breaker 21, high-voltage circuit breaker 22, power supply circuit breaker 23, and standby circuit breaker 24) described later provided on each cable 3; relays (such as earth fault overvoltage relay 25, digital multi-relay 26, and earth fault overcurrent relay (not shown), undervoltage relay (not shown), overvoltage relay (not shown), underfrequency relay (not shown), and overfrequency relay (not shown)); disconnectors (such as high-voltage disconnector 27) and switches (such as high-voltage switch 28, not shown) provided on the high-voltage cable 3H; an uninterruptible power supply 29; and a control device 30 for the conversion unit 12 described later located outside the panel housing 2. It should be noted that the high voltage power transmission section 20 can also be defined as a section including a part of the high voltage cable 3H described below, the high voltage circuit breaker 22, the high voltage disconnecting switch 27, or the high voltage switch 28. In addition, the panel housing 2 may contain an instrument voltage transformer 31, an instrument current transformer 32, a clamp-type current transformer 32', a zero-phase voltage detector 33, a voltmeter 34, a voltmeter changeover switch 35, an ammeter 36, an ammeter changeover switch 37, a wattmeter 38, a circuit protector 39, a voltage test terminal 40, a current test terminal 41, a synchronism detector 42, a single-phase voltage transformer 43, a disconnect terminal 44, a grounding resistor 45, a fuse 46, etc., or may contain at least one of a power meter for purchase 47, a power purchase watt-hour meter 48, a power sale watt-hour meter 49, a zero-phase current transformer (not shown), a watt-hour meter (not shown), a communication device (not shown), a single-phase transformer (not shown), etc. Furthermore, the panel housing 2 may include an equipment housing 2' (see Figure 14) such as a control box or cubicle that incorporates at least one of the following: a ground fault overvoltage relay 25, a digital multi-relay 26, an uninterruptible power supply 29, a control device 30, a communication device, a watt-hour meter, a ground fault overcurrent relay, etc.

[0022] <3 cables, 3x external cable routing space> As shown in Figures 1, 4 to 6, and 10 to 15, the cable 3 extends from the above-mentioned panel housing 2 to the outside of the panel and is sandwiched between vertical support members 4A (described later) erected around the periphery (at least on each of one side and the other side). The cable 3 may be fixed to a lateral support member 4B, which will be described later, and may include a pipe 3' that covers the cable 3. The part of cable 3 other than that inside panel housing 2 can also be said to be an external cable, and this external cable may overlap panel housing 2 in a plan view.In addition, cable 3 (external cable) may be laid underground or on an interior wall or ceiling indoors. As described above, the cables 3 include the low-voltage cable 3L and the high-voltage cable 3H. Below, the low-voltage cable 3L, the high-voltage cable 3H, the ground cable 3S, and the control cable 3C will be explained in detail.

[0023] The low-voltage cable 3L is a cable that connects the transformer 5 (described later) and any device (such as the conversion unit 12 of the power distribution system 10 (described later)) outside the panel housing 2 and carries the low-voltage AC current L, and can also be considered a low-voltage circuit. The low-voltage cables 3L may be arranged in a set of three for a three-phase three-wire (3φ3W) or single-phase three-wire (1φ3W) system, or in a set of two for a single-phase two-wire (1φ2W) system, etc., and multiple low-voltage cables 3L may be arranged in a set depending on the power distribution system (power transmission system). In this case, each low-voltage cable 3L or a set of multiple low-voltage cables 3L may be stored in a low-pressure piping 3L' such as a cable hose inserted into the low-pressure opening 2eL of the panel housing 2 described above. The high-voltage cable 3H is a cable that connects the transformer 5 (described later) and any device (such as system K (described later)) outside the panel housing 2, and carries high-voltage AC current H, and can also be considered a high-voltage circuit. The high-voltage cables 3H may also be arranged in sets of three depending on the power distribution system (power transmission system), such as a set of three cables for three-phase three-wire (3φ3W) or single-phase three-wire (1φ3W), or a set of two cables for single-phase two-wire (1φ2W), and in this case, the set of multiple high-voltage cables 3H or each individual high-voltage cable 3H may be housed in a single high-voltage piping 3H' such as a cable cylinder or cable hose inserted into the high-voltage opening 2eH of the panel housing 2 described above.

[0024] Additionally, the grounding cable 3S is a cable that connects the transformer 5 (strictly speaking, the grounding resistor 45, etc.) described below and any device (such as the grounding point 5' described below) outside the panel housing 2, and allows overcurrent to flow when a ground fault occurs, and can also be considered a grounding circuit. The grounding cables 3S may also be arranged in a set of three cables in the case of a three-phase three-wire (3φ3W) or single-phase three-wire (1φ3W) system, or in a set of two cables in the case of a single-phase two-wire (1φ2W) system, etc., and multiple cables may be arranged in a set depending on the power distribution system (power transmission system). In this case, the multiple sets of grounding cables 3S or each individual cable may be housed in a grounding pipe 3S' such as a cable hose inserted into the grounding opening 2eS of the panel housing 2 described above. The control cable 3C is a cable that connects the equipment inside the panel housing 2 described above (such as the instrument voltage transformer 31, the instrument current transformer 32, the zero-phase voltage detector 33, the zero-phase current transformer, or a relay such as the digital multi-relay 26) to any equipment outside the panel housing 2 (such as the control device 30 of the conversion unit 12 described later), and transmits output signals and control signals, and can also be considered a control line. The control cables 3C may be one cable from each device (such as a relay such as the digital multi-relay 26) in the panel housing 2, or a set of three cables in the case of a three-phase three-wire (3φ3W) or single-phase three-wire (1φ3W) system, or a set of two cables in the case of a single-phase two-wire (1φ2W) system, etc. Depending on the power distribution method (power transmission method), multiple cables may be grouped together in a set of high-voltage cables 3H or low-voltage cables 3L, and multiple cables may be grouped together in a set of cables from each device (such as an instrument current transformer 31 or a zero-phase voltage detector 33), one cable from each high-voltage cable 3H or each low-voltage cable 3L, and in this case, each or a set of multiple control cables 3C may be stored in a control piping 3C' such as a cable hose inserted into the control opening 2eC of the panel housing 2 described above.

[0025] The cable 3 described above may extend downward (hang down) from the underside of the panel housing 2 (such as the bottom plate 2e), in which case it can be said that an external cable routing space 3X exists between the panel housing 2 (the underside of the bottom plate 2e) and the installation surface M, and to the side of the transformer 5 (front or rear side). To explain in more detail, at least a portion of the external cable routing space 3X may overlap the panel housing 2 in a planar view, or a portion of the external cable routing space 3X may protrude from the panel housing 2 in a planar view. The vertical (up-down) length of the external cable routing space 3X is not particularly limited, but for example, the entire area from the panel housing 2 (the lower surface of the bottom plate 2e) to the installation surface M may be the external cable routing space 3X. Alternatively, the external cable routing space 3X may extend from the panel housing 2 to the middle of the vertical direction, in which case the cable 3 may extend downward from the underside of the panel housing 2 a predetermined distance and then be routed above or to the side outside the panel housing 2 (see the control cable 3C in Figure 10 and Figure 12). Furthermore, there may be only one external cable routing space 3X in one panel 1 (only one of the front, back, left and right in a planar view) (see Figures 1 to 4, 13, etc.), two (one each on the front and back in a planar view) (see Figures 5, 6, etc.), or three or more (at least one each on the front and back, and left and right in a planar view).

[0026] <Vertical support member 4A> As shown in Figures 1 to 3, 5, and 7 to 13, the vertical support member 4A is a member that is erected around the above-mentioned off-board cable installation space 3X (or the cable 3 itself), and is erected at least on one side and the other side of the off-board cable installation space 3X. In other words, the number of vertical support members 4A is plural, and more specifically, if there is only one off-panel cable routing space 3X, the number of vertical support members 4A will be only "two" that sandwich the off-panel cable routing space 3X, and if there are two off-panel cable routing spaces 3X, one on the front and one on the back in plan view, the number will be "four in total" that sandwich the front and rear off-panel cable routing spaces 3X in plan view, while if there are two off-panel cable routing spaces 3X, one on either the front or back and one on either the left or right in plan view, the two off-panel cable routing spaces 3X are approximately L-shaped in plan view, so the number of vertical support members 4A may be three.Furthermore, it can also be said that four vertical support members 4A will suffice even if there are three or more off-panel cable routing spaces 3X (at least one on each side in plan view in addition to one on each side). In addition, in the present invention, "the vertical support members 4A are erected at least on one side and the other side of the off-panel cable installation space 3X" means that, when viewed from the side where the off-panel cable installation space 3X exists (or where the cable 3 is installed) (side view as viewed from Figures 3, 7, etc.), the vertical support members 4A are erected at least on one side and the other side of the off-panel cable installation space 3X. The vertical support member 4A may be erected from the lower part (such as the leg 5a) of the transformer 5 described later, and may overlap the panel housing 2 described above in a planar view. The vertical support member 4A and the lower part of the transformer 5 may be erected via fasteners such as screws, bolts, nuts, washers, cable ties, plates, etc., or may be erected via welding, adhesive, etc. Furthermore, the vertical support member 4A may be provided with a horizontal support member 4B (described later) extending from one side to the other side.

[0027] The specific configuration of the vertical support member 4A is not particularly limited, but it may be, for example, a rod-shaped material having a longitudinal direction, and its cross-sectional shape may be approximately L-shaped, approximately U-shaped, approximately R-shaped, etc. Alternatively, the vertical support member 4A may be a plate-like member having a longitudinal direction. Furthermore, the vertical support member 4A may have holes (insertion holes) formed therein through which bolts, nuts, etc. of fixing devices can be inserted, and the shape of these holes is not particularly limited, but may be, for example, an elongated hole (approximately track-shaped or approximately elliptical), a round hole (approximately circular), or an approximately square shape. There may be only one insertion hole, but there may also be a plurality of insertion holes formed at predetermined intervals approximately along the vertical direction (up-down direction, vertical direction, standing direction or longitudinal direction) of the vertical support member 4A. The angle at which the vertical support members 4A are erected is not particularly limited, but may be, for example, approximately 90°, or may be inclined at an angle of 80° to 90°, or 85° to 90°, relative to the installation surface M. The vertical (up-down) length of the vertical support member 4A is not particularly limited, but may be, for example, approximately equal to the length from the installation surface M to the panel housing 2 (the lower surface of the bottom plate 2e).In this case, the lower part of the vertical support member 4A may be fixed to the side of the leg 5a of the transformer 5 using a fixing device or the like. Furthermore, the vertical length of the vertical support member 4A may be the length from the top surface of the lower part (such as the leg 5a) of the transformer 5 to the panel housing 2, in which case this vertical length can be said to be approximately equal to the erect length of the vertical support member 4A, and the lower end of the vertical support member 4A can be said to be attached to the top surface of the leg 5a of the transformer 5. In addition, the vertical length of the vertical support member 4A does not have to reach from the installation surface M or the upper surface of the lower part of the transformer 5 to the panel housing 2, but may extend from the installation surface M etc. to a vertical midpoint.

[0028] <Horizontal support member 4B, etc.> 10 to 12, the lateral support member 4B is a member that extends from one of the vertical support members 4A to the other of the vertical support members 4A described above, and the above-mentioned cable 3 is fixed to the lateral support member 4B. The number of lateral support members 4B may be one or more. In the present invention, the phrase "the lateral support member 4B is a member that extends from one vertical support member 4A to the other vertical support member 4A" means that one end of a given lateral support member 4B is fixed to one vertical support member 4A, and the other end of the lateral support member 4B is fixed to the other vertical support member 4A. The lateral support member 4B and the vertical support member 4A, and the lateral support member 4B and the cable 3 may be fixed using the above-mentioned fasteners or by other methods such as welding or adhesive. The lateral support member 4B may overlap the panel housing 2 in plan view. It can be said that at least a part of the lateral support member 4B is present inside the external cable routing space 3X.

[0029] The specific configuration of the lateral support member 4B is not particularly limited, but it may be, for example, a rod-shaped material having a longitudinal direction, and its cross-sectional shape may be approximately L-shaped, approximately U-shaped, approximately R-shaped, etc. Alternatively, the lateral support member 4B may be a plate-shaped member having a longitudinal direction, or may be a duct-shaped member having a longitudinal direction (see FIG. 12). In particular, when the lateral support member 4B is duct-shaped, the duct-shaped lateral support member 4B can be said to have a substantially U-shaped cross section having a pair of side plates and a plurality of connecting members connecting the pair of side plates, and the cable 3 is routed laterally within this duct-shaped (substantially U-shaped) lateral support member 4B while being fixed with fixing devices, etc. When fixing the duct-shaped lateral support member 4B to the vertical support member 4A, in addition to the fixing devices described above, knee-brace-shaped members may be attached across the vertical support member 4A and the duct-shaped lateral support member 4B to support the duct-shaped lateral support member 4B from below.

[0030] Furthermore, the horizontal support member 4B may also have holes (insertion holes) formed therein through which bolts, nuts, etc. of fixing devices can be inserted, and the shape of these holes is not particularly limited, but may be, for example, an elongated hole (approximately track-shaped or approximately elliptical), a round hole (approximately circular), or an approximately square shape. There may be only one insertion hole, but there may also be multiple insertion holes formed at predetermined intervals approximately along the lateral direction (horizontal direction (left and right direction), or spanning direction or longitudinal direction) of the lateral support member 4B. The angle α of the horizontal support member 4B is not particularly limited, but may be, for example, approximately in line with the installation surface M or the underside of the bottom plate 2e of the panel housing 2, or the angle (overlap angle) between the installation surface M etc. and the horizontal support member 4B may be oblique, such as between 0° and 10° or between 0° and 5°. The lateral (horizontal) length of the lateral support member 4B is not particularly limited, but for example, the minimum value of the lateral length can be said to be approximately equal to the distance between the vertical support member 4A on one side and the vertical support member 4A on the other side (the distance between the vertical support members 4A). The lateral length of the lateral support member 4B may be longer than the distance between the vertical support members 4A, in which case one end and / or the other end of the lateral support member 4B may extend beyond the vertical support members 4A. Furthermore, the cable 3 may be fixed to the portion extending beyond the horizontal support member 4B (see Figures 10 and 11). In this case, the cable 3 fixed to the extending portion of the horizontal support member 4B may be a control cable 3C entering or exiting a control box (such as a control device 30) (see Figure 10), or a grounding cable 3S from a transformer 5. This space in which the cable 3 is arranged beyond the vertical support member 4A (outside the pair of vertical support members 4A on one side and the other side) can also be said to be an outside-vertical-support cable arrangement space 3X'. The vertical mounting position of such a lateral support member 4B relative to the vertical support member 4A is not particularly limited, but for example, if there is one lateral support member 4B, it may be mounted approximately in the vertical center of the vertical support member 4A or slightly above that center, or if there are multiple lateral support members 4B, they may be mounted at a predetermined interval along the vertical direction of the vertical support member 4A (if there are two lateral support members 4B, they may be mounted at a position that is approximately one-third or approximately two-thirds of the way up and down the vertical support member 4A).

[0031] <Transformer 5> 1 to 3, 5, and 7 to 15, if the panel 1 is for power distribution, the transformer 5 is a device that transforms (boosts) the low-voltage AC current L from outside the panel casing 2 into a higher voltage AC current H, or is a so-called transformer (TR). Note that "transformer" is an abbreviation for "transformer." The transformer 5 supports the above-mentioned panel housing 2 from below, and its lower end may be located lower than the lower end of the panel housing 2, and it can be said that the above-mentioned panel housing 2 is attached to the transformer 5 from above. In other words, the transformer 5 is installed outside the panel housing 2, eliminating the need for a ventilation fan or auxiliary power supply for the ventilation fan inside the panel housing 2, making it easy to repair and paint the transformer 5 (main body), allowing maintenance over a long period of time (for example, more than 20 years), and it can be said that the transformer is shipped as a single unit, eliminating the need for assembly work at the installation site. It can also be said that in the power distribution system 10, the transformer 5 is connected between the system K (high voltage cable 3H side) and the conversion unit 12 (low voltage cable 3L side). The capacity of the transformer 5 (unit: VA, continuous rating) is not particularly limited, but may be, for example, 50 kVA or more and 2000 kVA or less, preferably 100 kVA or more and 1500 kVA or less, and more preferably 200 kVA or more and 1000 kVA or less (300 kVA, 500 kVA, 750 kVA, etc.).

[0032] The configuration of transformer 5 is not limited, and may be, for example, a two-winding transformer (two-winding transformer) with a primary winding and a secondary winding, a three-winding transformer (three-winding transformer) with a primary winding, a secondary winding, and a tertiary winding, or a transformer with four or more windings. Hereinafter, the transformer 5 will be mainly described as a two-winding transformer. The transformer 5, which is a two-winding transformer, may have, for example, a primary side on the high-voltage cable 3H side and a secondary side on the low-voltage cable 3L side. In this case, there are no particular restrictions on the specific values, but for example, the voltage of the primary side on the high-voltage cable 3H side may be 5,000 V or more and 40,000 V or less, preferably 5,500 V or more and 30,000 V or less, and more preferably 6,000 V or more and 25,000 V or less (6,600 V or 22,000 V, etc.), and the voltage of the secondary side on the low-voltage cable 3L side may be 100 V or more and 1,000 V or less, preferably 150 V or more and 800 V or less, and more preferably 200 V or more and 600 V or less (440 V, 254 V, 550 V, 318 V, etc.).

[0033] There are no particular restrictions on the wiring method of the primary and secondary sides of the transformer 5, but for example, the primary side, which is the side of the high-voltage cable 3H, may be a delta connection (Δ connection), and the secondary side, which is the side of the low-voltage cable 3L, may be a star connection (Y connection) (i.e., Δ-Y connection), or the order of the primary side and secondary side may be Δ-Δ connection, Y-Δ connection, or YY connection (in these cases, both the primary side and secondary side will be three-phase three-wire (3φ3W)). The low-voltage terminal (low-voltage input terminal) of the transformer 5 is a terminal for inputting a low-voltage AC current L to the transformer 5, and the high-voltage terminal (high-voltage output terminal) is a terminal for outputting a high-voltage AC current H from the transformer 5. Each of these terminals may be provided in the panel housing 2 so as to protrude (stand upright) from the bottom plate 2e thereof, and the arrangement of the terminals in a plan view is not particularly limited, but for example, three wires for each terminal may be arranged in approximately a left-right row (approximately a horizontal row). The transformer 5 may be provided with multiple heat dissipation fins (heat dissipation plates) 5b erected from its outer surface, may be an oil-immersed transformer (self-cooled, air-cooled, water-cooled, etc.), or may be a dry-type transformer (self-cooled, air-cooled, water-cooled, etc.), may be equipped with a contact prevention plate, or the grounding point 5' may be Class B grounding (EB), Class D grounding (ED), neutral grounding, etc. Transformer 5 may have a suspending device 5T, which is a part onto which a crane hook attached to the end of a wire rope, a sling wire, a ring, or the like is hooked when transformer 5 itself or the entire panel 1 is suspended by a crane or the like for transportation, loading, installation, etc. The specific configuration of suspending device 5T is not particularly limited, and may be, for example, hook-shaped or annular. Two or more suspending devices 5T may be provided for one transformer 5, and the positions at which suspending devices 5T are provided may be approximately equal positions in the front-to-rear direction (positions symmetrical in the front-to-rear direction (for example, a position at approximately one-third or approximately two-thirds)).

[0034] The lower part of the transformer 5 may be installed by attaching legs 5a (installation members having a roughly U-shape in plan view, including a pair of left and right rods, or connecting rods connecting the rear ends of the pair of left and right rods) to the foundation of the above-mentioned panel 1 via fixing members (not shown) such as screws.The cross-sectional shape of the legs 5a is not particularly limited, but may be, for example, a roughly L-shape, a roughly U-shape, or a roughly R-shape, or it may be a roughly L-shape at the end but become a roughly U-shape or a roughly R-shape halfway through. Furthermore, the legs 5a of the transformer 5 may extend toward the side where the external cable routing space 3X is located. If there is only one external cable routing space 3X in a single panel 1, for example, on the front side in a planar view, the legs 5a may extend forward (as far as below each opening in the bottom plate 2e of the panel housing 2) (see Figures 1, 4, etc.); if there is one external cable routing space 3X in the front and one in the back in a planar view, the legs 5a may extend forward and backward (as far as below each opening in the front and back of the bottom plate 2e of the panel housing 2) (see Figures 5, 6, 13, etc.). Since the panel housing 2 is attached above the transformer 5 described above, not only is space-saving achieved, but the panel 1 can be installed by simply fixing the transformer 5, making installation easier. Furthermore, the panel housing 2 mounted above the transformer 5 and the devices inside it are located at a position higher than the vertical length of the transformer 5 from the installation surface M, so even if water is immersed up to a height approximately equal to the vertical length of the transformer 5, the devices will not be submerged. It can be said that the transformer 5 is waterproof.

[0035] <Other> The present invention is not limited to the above-described embodiment, and the individual components of the panel 1 and the like, as well as the overall structure, shape, dimensions, etc., can be modified as appropriate in accordance with the spirit of the present invention. The panel 1 may not have the above-mentioned cable 3 (in other words, may be in a state where the cable 3 is to be installed), and in this case the external cable installation space 3X is a space in which the cable 3 can be installed, and can also be said to be, for example, the space below (or near) each opening formed in the bottom plate 2e of the panel housing 2, through which the cable 3 passes. Note that each opening in this case may be in the form of a pilot hole. The cables 3 are arranged inside and outside the panel housing 2 by passing through various openings formed in the bottom plate 2e of the panel housing 2, etc., but the configuration may also be such that the cables inside the panel housing 2 and the external cables are each connected to terminal blocks (terminals) provided on the outer surface of the panel housing 2, etc. The board 1 may not have the above-mentioned lateral support member 4B (in other words, it may be in a state where the lateral support member 4B is planned to be provided), in which case the cable 3 may be fixed directly to the vertical support member 4A. The vertical support member 4A does not have to be erected from the leg 5a of the transformer 5, but may be erected from another lower part of the transformer 5 (for example, a rod-shaped member extending from below the heat dissipation fin 5b of the transformer 5 toward the off-panel cable installation space 3X, and the rod-shaped member, etc.).

[0036] The installation location of the panel 1 may be the outer surface of an existing power system panel (receiving panel). In this case, the panel 1 can be used as a power generation connection panel (power generation connection panel) incorporating power generation connection devices (such as a low-voltage circuit breaker 21, a reverse power relay (not shown), a receiving power meter (not shown), a generating power meter (not shown), and an instrument current transformer 32) when retrofitting a power generation system such as a solar power generation system to an existing power system panel. The panel housing of the power generation connection panel does not need to have a pre-installed foundation, and the bottom material of the panel housing may be floating (separate) from the installation surface of the power system panel. In this case, the external cable routing space 3X can be between the bottom surface of the panel 1 and the installation surface M of the existing panel. The vertical support member 4A can be attached to the bottom plate 2e of the panel housing 2 in this case, attached to the existing power system panel, or erected from the installation surface M (such as the foundation of the power system panel). The panel 1 does not need to have a transformer 5, in which case the panel 1 can be used for connecting the power generation described above. The transformer 5 may be attached to the side of the panel housing 2. In this case, if the conversion unit 12 of the power distribution system 10 described later and the high-voltage power transmission unit 20 described above are provided inside the panel housing 2, an opening for inserting the cable 3 (for example, a cable connecting the conversion unit 12 to a terminal erected on the top surface of the transformer 5, or a cable connecting a terminal erected on the top surface of the transformer 5 to the high-voltage power transmission unit 20) can be said to be provided in the side plate of the panel housing 2, and in this case, the off-panel cable arrangement space 3X can be said to exist between the opening and the terminal erected on the top surface of the transformer 5, and on the side of the panel housing 2. Note that the vertical support member 4A may be erected upward from the top surface of the transformer 5 in this case, or erected laterally from the side surface of the panel housing 2 in this case. The panel housing 2 and the transformer 5 in the panel 1 described above may be in the following other embodiments.

[0037] <Another embodiment of the panel housing 2> As shown in FIG. 13, another embodiment of the panel housing 2 includes a low-voltage panel housing 2A, which will be described later, and a high-voltage panel housing 2B, which will be described later. The low-voltage panel housing 2A is included in the above-mentioned panel housing 2, and is a panel housing in which the above-mentioned low-voltage circuit breaker 21 and the like are provided. The high-voltage panel housing 2B is included in the above-mentioned panel housing 2, and is a panel housing in which the above-mentioned high-voltage circuit breaker 22 (or high-voltage switch) is provided. Furthermore, the weight of these panel housings 2A, 2B may be supported by the above-mentioned transformer 5, and as such support, the high-voltage panel housing 2B may be attached to the above-mentioned transformer 5 from above, and the low-voltage panel housing 2A may be attached to the high-voltage panel housing 2B from one side when viewed from above (for example, from the front), with the lower end of the low-voltage panel housing 2A extending to the bottom of the transformer 5. Here, "the lower end of the low-voltage board casing 2A extends to the bottom of the transformer 5" includes cases where the lower end of the low-voltage board casing 2A extends to the vicinity of the lower end of the transformer 5 (above the lower end of the transformer 5 and within a range of ¼ (one-quarter) to one-third (one-third) from the bottom in the vertical length of the transformer 5) and cases where the lower end of the low-voltage board casing 2A is at approximately the same height as the lower end of the transformer 5, but does not include cases where the lower end of the low-voltage board casing 2A extends to a position below the lower end of the transformer 5. Furthermore, even if the lower end of the low-voltage board casing 2A is at approximately the same height as the lower end of the transformer 5, the low-voltage board casing 2A may not be installed relative to the installation surface M, and only the transformer 5 may be installed relative to the installation surface M, or conversely, the low-voltage board casing 2A may also be installed relative to the installation surface M.

[0038] There are no particular limitations on the specific configuration of the low-voltage panel housing 2A and the high-voltage panel housing 2B, but for example, each may be formed in a generally rectangular parallelepiped or cubic shape, and may also be called a cubicle. The low-voltage panel housing 2A and the high-voltage panel housing 2B may have their upper surfaces (top plates) tilted backward. In the following description, the low-voltage panel housing 2A and the high-voltage panel housing 2B will be mainly described as each having a substantially rectangular parallelepiped shape. The low-voltage panel housing 2A and the high-voltage panel housing 2B may each have one or more doors 2Aa, 2Ba (two double doors, one side-opening door, etc.) that can be opened and closed, and in particular, the side of the low-voltage panel housing 2A on which the door 2Aa is provided may be the front side of the low-voltage panel housing 2A, and the side of the high-voltage panel housing 2B on which the door 2Ba is provided may be the rear side of the high-voltage panel housing 2B. Note that the doors 2Aa, 2Ba of the low-voltage panel housing 2A and the high-voltage panel housing 2B may each be in the form of a sweep window. In addition, the low-voltage panel housing 2A and the high-voltage panel housing 2B may be separated by a partition plate 2f. Moreover, since the front-to-rear length of the high-voltage panel housing 2B is longer than the front-to-rear length of the transformer 5, the rear part 2Bb of the high-voltage panel housing 2B may protrude further rearward than the transformer 5. Furthermore, a forward-protruding eaves part 2Ab may be provided at the upper end part of the low-voltage panel housing 2A.

[0039] The low-voltage panel casing 2A and the high-voltage panel casing 2B may have an intake port 2g for drawing air from the outside to the inside, and an exhaust port 2d for discharging air from the inside to the outside. The positions of these intake ports 2g and exhaust ports 2d are not particularly limited, but for example, the intake port 2g may be provided on the rear surface of the low-voltage panel housing 2A (so as to open into the gap with the transformer 5) or on the underside of the rear-protruding rear portion 2Bb of the high-voltage panel housing 2B, and the exhaust port 2d may be provided on the underside of the eaves portion 2Ab of the low-voltage panel housing 2A. By providing the intake ports 2g and exhaust ports 2d in these locations, they are less noticeable than when a louver (not shown) or the like is provided on the side of each panel housing 2A, 2B, and it can be said that the appearance is improved. In addition, generally, the intake ports 2g may be provided in the lower part of the low-voltage panel housing 2A or the high-voltage panel housing 2B, and the exhaust ports 2d may be provided in the low-voltage panel housing 2A or the high-voltage panel housing 2B (above the transformer 5). In addition, a high-voltage opening 2eH for the high-voltage cable 3H may be provided on the underside (bottom plate 2Be of the high-voltage panel housing 2B) of the rearward-protruding rear portion 2Bb of the high-voltage panel housing 2B, with the result that the high-voltage cable 3H hangs downward from the underside of the rear portion 2Bb of the high-voltage panel housing 2B, and the installation of the high-voltage cable 3H does not impede the fore-and-aft length of the panel 1. Therefore, even in another embodiment of the panel housing 2, the cable 3 may extend downward (hang down) from the bottom plate 2Be of the high-voltage panel housing 2B (i.e., the underside of the panel housing 2), and in this case, it can be said that an off-panel cable arrangement space 3X exists between the bottom plate 2Be of the high-voltage panel housing 2B (i.e., the panel housing 2) and the installation surface M, and to the side (rear side) of the transformer 5. Furthermore, a low-voltage opening 2eL for the low-voltage cable 3L may also be provided on the underside of the low-voltage panel housing 2A (the bottom plate 2Ae of the low-voltage panel housing 2A), with the result that the low-voltage cable 3L hangs downward from the underside of the low-voltage panel housing 2A, and even if the low-voltage cable 3L is installed, there is no problem with the front-to-rear length of the panel 1. Here, it can be said that the vertical support member 4A overlaps with the high-voltage panel housing 2B (i.e., the panel housing 2) in a plan view. The cable 3 extends downward (hangs down) from the bottom plate 2Ae of the low-voltage panel housing 2A (i.e., the underside of the panel housing 2). In this case, it can be said that an external cable installation space 3X exists between the bottom plate 2Ae of the low-voltage panel housing 2A (i.e., the panel housing 2) and the installation surface M, and also on the side (front side) of the transformer 5. Depending on the distance between the bottom plate 2Ae of the low-voltage panel housing 2A and the installation surface M, vertical support members 4A are provided on both sides of the external cable installation space 3X. When the vertical support members 4A are provided, they may be attached to legs 5a extending forward (to below each opening of the bottom plate 2Ae of the low-voltage panel housing 2A) and erected thereon, or may be attached to the bottom plate 2Ae side of the low-voltage panel housing 2A, erected from the installation surface M, or erected from another lower part of the transformer 5 (for example, a rod-shaped member extending from below the heat dissipation fins 5b of the transformer 5 toward the front external cable installation space 3X side, and the rod-shaped member may be provided). Here, it can be said that the vertical support members 4A overlap the low-voltage panel housing 2A (i.e., the panel housing 2) in a plan view. Other configurations, effects, and usage modes of the panel housing 2 and the like are the same as those of the panel housing 2 of the above-described embodiment.

[0040] <Another embodiment of the transformer 5> On the other hand, in another embodiment of the panel housing 2, from the perspective of the transformer 5, it can be said that the transformer 5 supports the weight of the above-mentioned low-voltage panel housing 2A and the weight of the above-mentioned high-voltage panel housing 2B. Another embodiment of transformer 5 may also have the above-described suspending tool 5T, but unlike the above-described transformer 5, the position at which suspending tool 5T is provided may be a position that is eccentric to at least one side in a plan view of transformer 5, and the symbol for the suspending tool at this eccentric position is 5T'. In this case, the eccentric distance can be said to be a distance at which the entire panel 1 becomes approximately horizontal when suspended, depending on the weight of cantilevered low-voltage panel housing 2A described below, etc. Two or more eccentrically positioned suspension fixtures 5T' may be provided for one transformer 5, and for example, they may be provided in a pair on the left and right near the remaining two sides (the left side and the right side) other than the sides on one side and the other side in a plan view (the front side and the rear side) of the above-mentioned top surface, or alternatively, only one may be provided (i.e., approximately near the center of the above-mentioned top surface in a plan view). Furthermore, the suspending devices 5T, 5T' may be provided at a position other than that which is eccentric to one side in a plan view on the transformer 5, and for example, as in the above-described embodiment, they may be provided at a position which is not eccentric to one side in a plan view (such as a position approximately in the center in the front-to-rear direction). The rest of the configuration, effects, and usage of the transformer 5 and the like are the same as those of the transformer 5 of the above-described embodiment. A system (power distribution system) 10 in which the panel 1 described above is used for power distribution will be described in detail below.

[0041] <Power Distribution System 10> 14, the power distribution system 10 includes the above-described power distribution panel 1, a power generation unit 11 and a conversion unit 12, which will be described later, and may also include a power storage device 14, which will be described later. One power distribution system 10 may include one or more power distribution panel 1. The power distribution system 10 may have the above-mentioned commercial transformer 47, power purchasing watt-hour meter 48, and power selling watt-hour meter 49 between the panel case 2 and the system K in the high-voltage cable 3H outside the panel case 2, and may also have a pole-mounted air switch 50 and a protective relay device 51 attached to the pole-mounted air switch 50, etc., attached to a utility pole. Note that K in the commercial transformer 47 in Fig. 14 indicates the system K side, and L indicates the load side. These commercial transformer 47, power purchase energy meter 48, power sale energy meter 49, pole-mounted air switch 50, and protective relay device 51 may be included in the system on the system K side (electric power company side) described below.

[0042] As shown in FIG. 14, the power generation unit 11 is a part that generates electricity and may have any configuration, such as solar power generation, wind power generation, hydroelectric power generation, geothermal power generation, solar thermal power generation, power generation using heat in the atmosphere or other heat present in nature, or power generation using biomass (organic matter derived from plants and animals that can be used as an energy source). Alternatively, the power generating unit 11 may generate power using ocean temperature difference, wave power, tidal currents (ocean currents), or tides. There is no particular limitation on the number of power generation units 11 in one power distribution system 10, and it may be, for example, one or more. The power generation unit 11 is provided outside the panel housing 2 (the power distribution system 10 has the power generation unit 11 outside the panel housing 2). There is also no particular limitation on the power generation power (capacity) of the power generation unit 11, and it may be, for example, 100 kW or more and 30,000 kW or less, preferably 300 kW or more and 20,000 kW or less, and more preferably 500 kW or more and 10,000 kW or less. The following will particularly describe the solar power generation unit 11 that generates solar power. The solar power generation unit 11 includes a solar cell 11a. In addition, the solar power generation unit 11 may have a pyranometer (not shown) that measures solar radiation intensity, a current collector (not shown) that collects DC current from the solar cells 11a, a connection box, etc., and sends it to the conversion unit 12 (described later), etc. The solar power generation unit 11 may have a plurality of solar cells 11a, and these plurality of solar cells 11a may be connected in series to form a solar cell string. The solar power generation unit 11 may have a connection box (not shown) to which a plurality of solar cell strings are connected in parallel, and there may be a plurality of such connection boxes.

[0043] As shown in FIG. 14, the conversion unit 12 is a part that converts the DC current or AC current from the power generation unit 11 described above into a low-voltage AC current L. The conversion unit 12 may include an inverter that converts DC current from the solar cell 11a into AC current, and may also include a controller that controls the voltage and frequency of the AC converted by the inverter, an air circuit breaker, etc. The conversion unit 12 is also called a power conditioner (PACON). The number of conversion units 12 in one power distribution system 10 is not particularly limited, and may be, for example, a plurality (for example, four or five) or just one. The conversion unit 12 is provided outside the panel housing 2 (the power distribution system 10 has the conversion unit 12 outside the panel housing 2). The conversion power (capacity) that can be converted by the conversion unit 12 is not particularly limited, and may be, for example, 30 kW or more and 10,000 kW or less, preferably 50 kW or more and 5,000 kW or less, and more preferably 100 kW or more and 2,000 kW or less (250 kW, 500 kW, etc.). The conversion power of the conversion unit 12 may be smaller than the power generation power of the solar power generation unit 11 described above (in other words, the power generation power may be greater than the conversion power), and in this case, it can be said that the solar cell 11a is overloaded with respect to the conversion unit 12. In addition, the conversion unit 12 may have an undervoltage relay (not shown), an overvoltage relay (not shown), an underfrequency relay (not shown), an overfrequency relay (not shown), or a passive or active islanding protection device (not shown).

[0044] As shown in Figure 14, the control device 30 is a device that is connected to the above-mentioned earth fault overvoltage relay 25, inputs a stop signal output from the earth fault overvoltage relay 25, and performs control such as stopping the conversion of the above-mentioned conversion unit 12, and may be a smart logger, a sequencer, a computer, etc. The number of control devices 30 in one power distribution system 10 may be one or more. The control device 30 is provided outside the panel housing 2 (the power distribution system 10 has the control device 30 outside the panel housing 2), or the control device 30 may be provided in an equipment housing 2' such as a control box or a cubicle. The power supply for the control device 30 is connected to the above-mentioned uninterruptible power supply 29 and is input from the uninterruptible power supply 29. Furthermore, the monitoring, setting changes, operation, etc. of the control device 30 may be performed by the user directly, or may be performed remotely via the Internet, telephone lines, etc. In addition, a system (power receiving and distribution system) 10' in which the panel 1 described above is used for power receiving and distribution will be described in detail below.

[0045] <Power distribution system 10'> As shown in Fig. 15, the power receiving and distribution system 10' has a power receiving and distribution panel 1 and a load 13, which will be described later. In the power receiving and distribution system 10', the load 13 consumes power that passes through at least a transformer 5 from a system K. The power receiving and distribution system 10' may also have the power generation unit 11 and conversion unit 12 described above, and / or a power storage device 14, which will be described later. One power receiving and distribution system 10' may have one or more power receiving and distribution panel 1. If the power distribution system 10' has a power generation unit 11, a conversion unit 12, and / or a power storage device 14, the load 13 may consume power from the system K via the transformer 5, power from the conversion unit 12, and / or power from the power storage device 14.

[0046] 15, the load 13 is a load (load equipment) that consumes at least the received power received from the above-mentioned system K. In other words, the value of the power consumption (capacity) of the load 13 may be greater than the value of the received power that the power receiving and distribution system 10′ receives from the system K (only a part of the power consumption of the load 13 may be covered by the received power). The load 13 may be, for example, an automobile dealership or a gas station, a rental car store (rental car shop), a charger 13a (described later) in a factory or workshop, or may include electrical equipment and facilities that use power such as electric and electronic devices (general lighting loads 13b1 such as incandescent lamps, fluorescent lamps, and mercury lamps (lighting fixtures), and general power loads 13b2 such as air conditioners, motors, and pumps), or may even include the factory or workshop itself. Furthermore, the load 13 may include devices that use electricity, such as electrical and electronic equipment in offices of corporations and organizations such as companies, individuals, government offices and associations, residences, stores, warehouses, garages, parking lots, bicycle parking lots, school buildings, auditoriums, gymnasiums, research facilities, hospitals, clinics, inns and hotels, theaters, movie theaters, stadiums, baseball stadiums, etc., or the offices of companies and the like, or may include a combination of these. Such load 13 can be said to include a secondary load 13' and a tertiary load 13" if the transformer 5 is a three-winding transformer having a primary winding, a secondary winding, and a tertiary winding, and can be said to include only a secondary load 13' if the transformer 5 is a two-winding transformer having a primary winding and a secondary winding. In the following, the charger 13a will be particularly described in detail.

[0047] The charger 13a may be any type of charger, such as a rapid charger, a normal charger, or an ultra-rapid charger. Here, the "charger 13a" in the present invention refers to a stationary charging device or charging facility used to charge vehicles with built-in batteries (storage batteries), such as electric vehicles (EVs), plug-in hybrid vehicles, and electric motorcycles, and is also called a charging stand, charging station, charging spot, etc. Note that the charger 13a may also be a charging device or charging facility used to charge communication devices with built-in batteries (storage batteries), such as smartphones and mobile phones, portable PCs (personal computers), electrical appliances, etc., in addition to vehicles. The output from the charger 13a to the electric vehicle or the like may be DC current or AC current, and it may be possible to output only one of them or both. On the other hand, the electric vehicle or the like may input DC current or AC current via a plug or the like, and it may be possible to input only one of them or both. The charger 13a may be configured to perform rapid charging when the output from the charger 13a is a direct current, and to perform normal charging when the output from the charger 13a is an alternating current. The charger 13a may have a separate power storage unit that stores power from the power storage device 14 or received power, or may have a conversion unit (such as an AC / DC converter, a DC / AC inverter (DC / AC converter), or a DC / DC converter) that converts the current from the power storage device 14 from AC to DC or from DC to AC.

[0048] As shown in Figure 15, the storage device 14 is a device that stores electricity (received power) from the system K via the transformer 5, and electricity (generated power) from the power generation unit 11 and conversion unit 12 described above, and unlike the uninterruptible power supply 29 described above, is provided outside the panel housing 2. The power storage device 14 may be, for example, a storage battery such as a lead storage battery, a lithium ion battery, a nickel-metal hydride battery, or a nickel-cadmium battery, or may store hydrogen generated by electrolysis of water using the power generated by the power generation unit 11 or the conversion unit 12, and extract electricity when needed using a fuel cell or the like. Alternatively, the power storage device 14 may be a device that stores electricity as kinetic energy using a flywheel or the like, stores electricity as potential energy using pumped water, or stores electricity directly as electrical energy using a capacitor or the like. When the transformer 5 is a three-winding transformer having a primary winding, a secondary winding, and a tertiary winding, such a storage device 14 may be connected to the tertiary side and / or the secondary side of the transformer 5, and the stored power from this storage device 14 will be consumed by at least one of the secondary load 13' and the tertiary load 13" described above. When the transformer 5 is a two-winding transformer having a primary winding and a secondary winding, the storage device 14 is connected to the secondary side of the transformer 5, and the stored power from this storage device 14 will be consumed by the secondary load 13'. Since the storage of electricity in the storage device 14 and the discharge of electricity from the storage device 14 are performed using direct current, a conversion unit may be connected between the storage device 14 and the load 13 to convert alternating current into direct current or to convert the direct current from the storage device 14 into alternating current for the load 13.

[0049] <Series K> As shown in Figures 14 and 15, system K transmits (receives) electricity to a power distribution panel 1, a power receiving and distribution panel 1, a power distribution system 10, and a power receiving and distribution system 10', and refers to the entire system through which electric power companies and the like supply electricity to consumers, and can also be called power system K. Specifically, system K includes facilities such as substations, transmission lines, and distribution lines, and may also include a power plant. System K may also include the above-mentioned utility transformer 47, power purchase watt-hour meter 48, power sale watt-hour meter 49, pole-mounted air switch 50, and protective relay device 51. The power handled by such system K may be either AC or DC, but the following description will be given assuming that it is AC. In System K, most of the electricity transmitted is AC, so it is transmitted using three-phase, three-wire (3φ3W) transmission lines. In order to reduce transmission losses during this process, the main long-distance transmission sections transmit electricity at as high a voltage as possible (for example, 6600V or 22000V). The electricity transmitted by system K is transformed (stepped down) in several stages near the point of consumption, and after the pole-mounted transformer, it is distributed via single-phase two-wire (1φ2W) or similar. System K may be a system (commercial power system) of an electric power company or the like, or may be a system independently owned by an organization such as a company or a local government, or a system within a plant (independent power system). [Industrial Applicability]

[0050] The panel of the present invention can be used for power distribution purposes, such as for solar power generation units, regardless of the amount or scale of power generation, and can also be used in power distribution systems and power distribution devices that generate power using generators (such as AC motors) rotated by wind, water, wave, geothermal, etc., other than solar power generation units, and can be used both indoors and outdoors.Furthermore, as a power distribution or power receiving device, it can be used not only for chargers but also for any other load equipment, and can be used in power distribution systems and power distribution devices regardless of the power contract or lead-in type, and can be used both indoors and outdoors.In addition, the panel of the present invention can also be used for connecting power generators. [Explanation of symbols]

[0051] 1 disc 2-panel cabinet 3 Cable 4A Vertical support member 4B Lateral support member 5. Transformers

Claims

1. The panel is characterized by having a panel housing (2), an external cable arrangement space (3X) for arranging cables extending from the panel housing (2) to the outside of the panel, and at least vertical support members (4A) erected on both sides of the external cable arrangement space (3X).

2. The panel also contains a transformer (5), The transformer (5) supports the panel housing (2) from below, and the lower end of the panel housing (2) is located above the lower end of the transformer (5); The external cable routing space (3X) is located between the panel housing (2) and the installation surface (M) of the panel, and to the side of the transformer 5, The panel according to claim 1, characterized in that the vertical support member (4A) stands upright from the lower part of the transformer (5) and overlaps the panel housing (2) in a plan view.

3. The panel also has a cable (3) arranged in the external cable arrangement space (3X) and a horizontal support member (4B) extending from the vertical support member (4A) on one side to the vertical support member (4A) on the other side, 3. A panel according to claim 1 or 2, characterized in that the cable (3) is fixed to the lateral support member (4B).

Images