Three-phase power supply switching unit

Abstract

To provide a technique capable of switching a state where a three-phase AC if a Y connection is converted into a single-phase AC and a state where a three-phase AC of a Δ connection is converted into a single-phase AC using a simple circuit.SOLUTION: A three-phase power supply switching unit comprises an electric board on which a first wiring unit or a second wiring unit is mounted. The electric board includes an input section and an output section. The first wiring unit includes a first input connection section, a first output connection section, and first wiring which connects the first input connection section with the first output connection section so as to output a three-phase AC of a Y connection inputted to the input section from the output section as a single-phase AC from the output section in a case where the first wiring unit is mounted on the electric board. The second wiring unit includes a second input connection section, a second output connection section, and second wiring which connects the second input connection section with the second output connection section so as to output a three-phase AC of a Δ connection inputted to the input section from the output section as a single-phase AC in a case where the second wiring unit is mounted on the electric board.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a three-phase power switching unit. [Background technology]

[0002] For example, Patent Document 1 discloses a semiconductor device including a switch circuit capable of switching the connection state between an input terminal pair and an output terminal pair between two connection states according to a logic level input to a control terminal. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2022-146999 A Summary of the Invention [Problem to be solved by the invention]

[0004] In a unit that converts three-phase AC using a Y connection or a Delta connection into single-phase AC, there was a problem that the circuitry became complicated when switching between a state in which the Y connection three-phase AC is converted into single-phase AC and a state in which the Delta connection three-phase AC is converted into single-phase AC by signal control. [Means for solving the problem]

[0005] According to a first aspect of the present disclosure, there is provided a three-phase power switching unit. This three-phase power supply switching unit includes an electrical board on which either a first wiring unit or a second wiring unit is mounted, the electrical board including an input section to which Y-connected or delta-connected three-phase AC is input, and an output section for outputting single-phase AC, the first wiring unit including a first input connection section connected to the input section, a first output connection section connected to the output section, and first wiring connecting the first input connection section and the first output connection section such that, when the first wiring unit is mounted on the electrical board, the Y-connected three-phase AC input to the input section is output from the output section as single-phase AC, and the second wiring unit including a second input connection section connected to the input section, a second output connection section connected to the output section, and second wiring connecting the second input connection section and the second output connection section such that, when the second wiring unit is mounted on the electrical board, the delta-connected three-phase AC input to the input section is output from the output section as single-phase AC. [Brief description of the drawings]

[0006] [Figure 1] FIG. 2 is an explanatory diagram showing a schematic configuration of a three-phase power supply switching unit. [Diagram 2] FIG. 4 is a diagram showing an internal configuration of a first wiring unit. [Diagram 3] FIG. 2 is a diagram showing the first wiring unit as viewed from the outside. [Figure 4] FIG. 4 is a diagram showing an internal configuration of a second wiring unit. [Diagram 5] FIG. 13 is a diagram showing the second wiring unit as viewed from the outside. [Figure 6] FIG. 11 is a diagram showing an internal configuration of a second wiring unit in the second embodiment. [Figure 7] FIG. 4 is a diagram showing a schematic configuration of a second electrical board. [Figure 8] FIG. 13 is a diagram showing an internal configuration of a third wiring unit. [Figure 9] 13 is a diagram showing an internal configuration of a fourth wiring unit. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] A. First embodiment: FIG. 1 is an explanatory diagram showing a schematic configuration of a three-phase power supply switching unit 10. The three-phase power supply switching unit 10 converts three-phase AC of Y connection or Δ connection into single-phase AC. The three-phase power supply switching unit 10 is installed, for example, in a factory. The three-phase power supply switching unit 10 is supplied with three-phase AC of Y connection or Δ connection from a distribution board installed in the factory. The three-phase power supply switching unit 10 converts the three-phase AC supplied from the distribution board into single-phase AC and supplies it to devices installed in the factory. The three-phase power supply switching unit 10 includes an electrical equipment board 100. Either a first wiring unit 200 or a second wiring unit 300 is attached to the electrical equipment board 100.

[0008] The electrical panel 100 includes an input section 110, an output section 120, a Y-connection display section 130, and a Δ-connection display section 140.

[0009] The input unit 110 receives three-phase AC in a Y-connection or three-phase AC in a Δ-connection. The voltage of the three-phase AC input to the input unit 110 is about 200V to 400V. The input unit 110 includes a first input terminal 111, a second input terminal 112, a third input terminal 113, and a fourth input terminal 114. The first input terminal 111, the second input terminal 112, and the third input terminal 113 receive each phase of the three-phase AC. For example, the first input terminal 111 receives an R phase, the second input terminal 112 receives an S phase, and the third input terminal 113 receives a T phase. When the input unit 110 receives three-phase AC in a Y-connection, a neutral line is connected to the fourth input terminal 114. When the input unit 110 receives three-phase AC in a Δ-connection, nothing is connected to the fourth input terminal 114. In the following description, when there is no need to distinguish between the input terminals, they will simply be referred to as input terminals. In this embodiment, the input terminals are female terminals.

[0010] The output unit 120 outputs a single-phase AC current. The output unit 120 includes a first output terminal 121, a second output terminal 122, a third output terminal 123, a fourth output terminal 124, a fifth output terminal 125, and a sixth output terminal 126. In this embodiment, the output unit 120 outputs three pairs of single-phase AC current. The output unit 120 outputs one pair of single-phase AC current from each of the first output terminal 121 and the second output terminal 122, the third output terminal 123 and the fourth output terminal 124, and the fifth output terminal 125 and the sixth output terminal 126. The voltage of the single-phase AC current output from the output unit 120 is about 200V to 240V. In the following description, when the output terminals are referred to without distinction, they are simply referred to as output terminals. A single-phase load is connected to each output terminal as shown in FIG. 1. The single-phase load is, for example, a device provided in a factory in which the three-phase power supply switching unit 10 is installed. In this embodiment, the output terminal is a female terminal.

[0011] The Y connection display unit 130 displays a display indicating that it is a Y connection. The Δ connection display unit 140 displays a display indicating that it is a Δ connection. The Y connection display unit 130 and the Δ connection display unit 140 are provided on the upper part of the electrical board 100. The Y connection display unit 130 displays "Y connection," and the Δ connection display unit 140 displays "Δ connection."

[0012] Fig. 2 is a diagram showing an internal configuration of the first wiring unit 200. Fig. 3 is a diagram showing the first wiring unit 200 as viewed from the outside. Figs. 2 and 3 show the first wiring unit 200 as viewed from the front. The first wiring unit 200 includes a first input connection section 210, a first output connection section 220, a first wiring 240, a first control unit 250, a first display section 260, and a first housing 270. The first wiring 240 and the first display section 260 are covered by the first housing 270.

[0013] The first input connection unit 210 is connected to the input unit 110 of the electrical board 100. The first input connection unit 210 includes a first input connection terminal 211, a second input connection terminal 212, a third input connection terminal 213, a fourth input connection terminal 214, a fifth input connection terminal 215, a sixth input connection terminal 216, a seventh input connection terminal 217, and an eighth input connection terminal 218. The first input connection terminal 211 and the second input connection terminal 212, the third input connection terminal 213 and the fourth input connection terminal 214, the fifth input connection terminal 215 and the sixth input connection terminal 216, and the seventh input connection terminal 217 and the eighth input connection terminal 218 are connected to each other. In this embodiment, the first input connection terminal 211, the third input connection terminal 213, the fifth input connection terminal 215, and the seventh input connection terminal 217 are male terminals provided on the back surface side of the first wiring unit 200. Hereinafter, when the input connection terminals are referred to without distinction, they will be simply referred to as input connection terminals.

[0014] The first output connection section 220 is connected to the output section 120 of the electrical board 100. The first output connection section 220 includes a first output connection terminal 221, a second output connection terminal 222, a third output connection terminal 223, a fourth output connection terminal 224, a fifth output connection terminal 225, a sixth output connection terminal 226, a seventh output connection terminal 227, an eighth output connection terminal 228, a ninth output connection terminal 229, a tenth output connection terminal 230, an eleventh output connection terminal 231, and a twelfth output connection terminal 232. The first output connection terminal 221 and the second output connection terminal 222, the third output connection terminal 223 and the fourth output connection terminal 224, the fifth output connection terminal 225 and the sixth output connection terminal 226, the seventh output connection terminal 227 and the eighth output connection terminal 228, the ninth output connection terminal 229 and the tenth output connection terminal 230, and the eleventh output connection terminal 231 and the twelfth output connection terminal 232 are connected to each other. In this embodiment, the second output connection terminal 222, the fourth output connection terminal 224, the sixth output connection terminal 226, the eighth output connection terminal 228, the tenth output connection terminal 230, and the twelfth output connection terminal 232 are male terminals provided on the back side of the first wiring unit 200. In the following, when the output connection terminals are referred to without distinction, they are simply referred to as output connection terminals.

[0015] The first wiring unit 200 is mounted on the electrical board 100 so that the first input connection terminal 211 is connected to the first input terminal 111, the third input connection terminal 213 is connected to the second input terminal 112, the fifth input connection terminal 215 is connected to the third input terminal 113, the seventh input connection terminal 217 is connected to the fourth input terminal 114, the second output connection terminal 222 is connected to the first output terminal 121, the fourth output connection terminal 224 is connected to the second output terminal 122, the sixth output connection terminal 226 is connected to the third output terminal 123, the eighth output connection terminal 228 is connected to the fourth output terminal 124, the tenth output connection terminal 230 is connected to the fifth output terminal 125, and the twelfth output connection terminal 232 is connected to the sixth output terminal 126.

[0016] The first wiring 240 connects the first input connection part 210 and the first output connection part 220 so that when the first wiring unit 200 is attached to the electrical board 100, the three-phase AC of the Y connection input to the input part 110 is output from the output part 120 as a single-phase AC. In this embodiment, the first wiring 240 is configured by a plurality of bus bars. The bus bars are preferably made of copper, brass, aluminum, or the like. The first wiring 240 includes a first bus bar 241, a second bus bar 242, a third bus bar 243, and a fourth bus bar 244. The first bus bar 241 connects the second input connection terminal 212 and the first output connection terminal 221. The second bus bar 242 connects the fourth input connection terminal 214 and the fifth output connection terminal 225. The third bus bar 243 connects the sixth input connection terminal 216 and the ninth output connection terminal 229. The fourth bus bar 244 connects the eighth input connection terminal 218, the third output connection terminal 223, the seventh output connection terminal 227, and the eleventh output connection terminal 231. The input connection terminal and the output connection terminal to which each bus bar connects are not limited to the above-mentioned terminals. Each bus bar only needs to connect the input connection terminal and the output connection terminal such that, when the first wiring unit 200 is attached to the electrical board 100, the three-phase AC of the Y connection input to the input section 110 is output from the output section 120 as single-phase AC.

[0017] The first control unit 250 includes a first detection section 251, a first control section 252, a first breaker 253, and a first notification section 254. The first control unit 250 is driven by power supplied from a battery (not shown). Hereinafter, the first control unit 250 will also be referred to as a control unit, the first detection section 251 as a detection section, the first control section 252 as a control section, the first breaker 253 as a breaker, and the first notification section 254 as a notification section.

[0018] The first detection unit 251 measures the voltage between the output connection terminals, thereby measuring the voltage of the single-phase AC output from the output unit 120. In this embodiment, the first detection unit 251 measures the voltage between the first output connection terminal 221 and the third output connection terminal 223. Note that the first detection unit 251 may measure the voltage between the fifth output connection terminal 225 and the seventh output connection terminal 227, or may measure the voltage between the ninth output connection terminal 229 and the eleventh output connection terminal 231.

[0019] The first control unit 252 transmits a signal to the first breaker 253 and the first notification unit 254 when the voltage measured by the first detection unit 251 exceeds a predetermined voltage range. The first control unit 252 is, for example, a microcomputer. The first control unit 252 may be configured by a circuit. For example, when the voltage measured by the first detection unit 251 is 180V or less or 260V or more, the first control unit 252 transmits a signal to the first breaker 253 to command the first input connection unit 210 and the first output connection unit 220 to be disconnected. In addition, the first control unit 252 transmits a signal to the first notification unit 254 to command the first notification unit 254 to issue a warning when the voltage measured by the first detection unit 251 is 180V or less or 260V or more.

[0020] The first control unit 252 identifies whether the three-phase AC input to the input unit 110 is a Y-connection or a Δ-connection based on the voltage measured by the first detection unit 251, and transmits a signal to the first notification unit 254 to command the first notification unit 254 to notify the information identifying whether the three-phase AC is a Y-connection or a Δ-connection. When the voltage measured by the first detection unit 251 is within a first range that is a predetermined voltage range, the first control unit 252 determines that the three-phase AC input to the input unit 110 is a Y-connection. In this case, the first control unit 252 transmits a signal to the first notification unit 254 to command the first notification unit 254 to notify the first notification unit 254 that the three-phase AC input to the input unit 110 is a Y-connection. In addition, when the voltage measured by the first detection unit 251 is within a second range that is a predetermined voltage range different from the first range, the first control unit 252 determines that the three-phase AC input to the input unit 110 is a Δ-connection. In this case, the first control unit 252 transmits a signal to the first notification unit 254 to command the first notification unit 254 to notify that the three-phase AC input to the input unit 110 is in a Δ connection. The first and second ranges are determined based on the voltage of the three-phase AC input to the input unit 110.

[0021] The first breaker 253 is provided between the first input connection unit 210 and the first wiring 240. Specifically, the first breaker 253 is provided between the second input connection terminal 212 and the first bus bar 241, between the fourth input connection terminal 214 and the second bus bar 242, between the sixth input connection terminal 216 and the third bus bar 243, and between the eighth input connection terminal 218 and the fourth bus bar 244. The first breaker 253 cuts off the connection between the first input connection unit 210 and the first output connection unit 220 based on the voltage measured by the first detection unit 251. That is, the first breaker 253 cuts off the connection between the input unit 110 and the output unit 120 of the electrical board 100 based on the voltage measured by the first detection unit 251. The first breaker 253 cuts off the connection between the first input connection portion 210 and the first output connection portion 220 based on a signal transmitted from the first control portion 252, for example, when the voltage measured by the first detection portion 251 is below 180 V or above 260 V.

[0022] 3, first notification unit 254 is provided on the outer surface of first housing 270. First notification unit 254 is, for example, a display. Note that first notification unit 254 may be provided inside first housing 270 so as to be visible from outside first housing 270. First notification unit 254 may be a light.

[0023] The first notification unit 254 issues a warning when the voltage measured by the first detection unit 251 exceeds a predetermined voltage range. For example, when the voltage measured by the first detection unit 251 is 180V or less or 260V or more, the first notification unit 254 displays a message saying "Abnormal voltage" based on a signal transmitted from the first control unit 252. When the first notification unit 254 is a light, the light may be turned on in the above-mentioned cases.

[0024] The first notification unit 254 notifies information for identifying whether the three-phase AC input to the input unit 110 is a Y connection or a Δ connection, based on the voltage measured by the first detection unit 251. When the voltage measured by the first detection unit 251 is within a first range, the first notification unit 254 displays a message "Y connection" based on a signal transmitted from the first control unit 252. Moreover, when the voltage measured by the first detection unit 251 is within a second range, the first notification unit 254 displays a message "Δ connection" based on a signal transmitted from the first control unit 252.

[0025] An indication that it is a Y connection is provided on first display unit 260. "Y connection" is written on first display unit 260. First display unit 260 is provided inside first housing 270.

[0026] The first housing 270 includes a first window portion 271 and a first plate portion 272 .

[0027] First window portion 271 is a window provided in first housing 270. First window portion 271 is provided in first housing 270 so as to make first display unit 260 visible from outside first housing 270.

[0028] The first plate portion 272 is a plate-like member provided on the upper part of the first housing 270. The first plate portion 272 is provided on the first wiring unit 200 so as to cover the Δ-connection display portion 140 of the electrical board 100 and expose the Y-connection display portion 130 when the first wiring unit 200 is attached to the electrical board 100.

[0029] FIG. 4 is a diagram showing an internal configuration of the second wiring unit 300. FIG. 5 is a diagram showing the second wiring unit 300 viewed from the outside. FIGS. 4 and 5 show the second wiring unit 300 viewed from the front. The second wiring unit 300 includes a second input connection section 310, a second output connection section 320, a second wiring 340, a second control unit 350, a second display section 360, and a second housing 370. The second wiring 340 and the second display section 360 are covered by the second housing 370. Hereinafter, when the first wiring unit 200 and the second wiring unit 300 are referred to without distinction, they are simply referred to as wiring units.

[0030] The second input connection unit 310 is connected to the input unit 110 of the electrical board 100. The second input connection unit 310 includes an eleventh input connection terminal 311, a twelfth input connection terminal 312, a thirteenth input connection terminal 313, a fourteenth input connection terminal 314, a fifteenth input connection terminal 315, a sixteenth input connection terminal 316, a seventeenth input connection terminal 317, and an eighteenth input connection terminal 318. The eleventh input connection terminal 311 and the twelfth input connection terminal 312, the thirteenth input connection terminal 313 and the fourteenth input connection terminal 314, the fifteenth input connection terminal 315 and the sixteenth input connection terminal 316, and the seventeenth input connection terminal 317 and the eighteenth input connection terminal 318 are connected to each other. In this embodiment, the eleventh input connection terminal 311, the thirteenth input connection terminal 313, the fifteenth input connection terminal 315, and the seventeenth input connection terminal 317 are male terminals provided on the back surface side of the second wiring unit 300.

[0031] The second output connection section 320 is connected to the output section 120 of the electrical board 100. The second output connection section 320 includes a twenty-first output connection terminal 321, a twenty-second output connection terminal 322, a twenty-third output connection terminal 323, a twenty-fourth output connection terminal 324, a twenty-fifth output connection terminal 325, a twenty-sixth output connection terminal 326, a twenty-seventh output connection terminal 327, a twenty-eighth output connection terminal 328, a twenty-ninth output connection terminal 329, a thirtieth output connection terminal 330, a thirty-first output connection terminal 331, and a thirty-second output connection terminal 332. The 21st output connection terminal 321 and the 22nd output connection terminal 322, the 23rd output connection terminal 323 and the 24th output connection terminal 324, the 25th output connection terminal 325 and the 26th output connection terminal 326, the 27th output connection terminal 327 and the 28th output connection terminal 328, the 29th output connection terminal 329 and the 30th output connection terminal 330, and the 31st output connection terminal 331 and the 32nd output connection terminal 332 are connected to each other. In this embodiment, the 22nd output connection terminal 322, the 24th output connection terminal 324, the 26th output connection terminal 326, the 28th output connection terminal 328, the 30th output connection terminal 330, and the 32nd output connection terminal 332 are male terminals provided on the back side of the second wiring unit 300.

[0032] The second wiring unit 300 is mounted on the electrical board 100 so that the 11th input connection terminal 311 is connected to the first input terminal 111, the 13th input connection terminal 313 is connected to the second input terminal 112, the 15th input connection terminal 315 is connected to the third input terminal 113, the 17th input connection terminal 317 is connected to the fourth input terminal 114, the 22nd output connection terminal 322 is connected to the first output terminal 121, the 24th output connection terminal 324 is connected to the second output terminal 122, the 26th output connection terminal 326 is connected to the third output terminal 123, the 28th output connection terminal 328 is connected to the fourth output terminal 124, the 30th output connection terminal 330 is connected to the fifth output terminal 125, and the 32nd output connection terminal 332 is connected to the sixth output terminal 126.

[0033] The second wiring 340 connects the second input connection section 310 and the second output connection section 320 so that when the second wiring unit 300 is attached to the electrical board 100, the three-phase AC of the Δ connection input to the input section 110 is output from the output section 120 as a single-phase AC. In this embodiment, the second wiring 340 is configured by a plurality of bus bars. The bus bars are preferably made of copper, brass, aluminum, or the like. The second wiring 340 includes a fifth bus bar 341, a sixth bus bar 342, and a seventh bus bar 343. The fifth bus bar 341 connects the twelfth input connection terminal 312, the twenty-first output connection terminal 321, and the thirty-first output connection terminal 331. The sixth bus bar 342 connects the fourteenth input connection terminal 314, the twenty-third output connection terminal 323, and the twenty-fifth output connection terminal 325. The seventh bus bar 343 connects the sixteenth input connection terminal 316, the twenty-seventh output connection terminal 327, and the twenty-ninth output connection terminal 329. The input connection terminal and the output connection terminal to which each bus bar connects are not limited to the above-mentioned terminals. Each bus bar only needs to connect the input connection terminal and the output connection terminal such that, when the second wiring unit 300 is attached to the electrical board 100, the three-phase AC of the Δ connection input to the input section 110 is output from the output section 120 as a single-phase AC.

[0034] The second control unit 350 includes a second detection unit 351, a second control unit 352, a second breaker 353, and a second notification unit 354. The second control unit 350 is driven by power supplied from a battery (not shown). Hereinafter, the second control unit 350 will also be referred to as a control unit, the second detection unit 351 as a detection unit, the second control unit 352 as a control unit, the second breaker 353 as a breaker, and the second notification unit 354 as a notification unit.

[0035] The second detection unit 351 measures the voltage between the output connection terminals, thereby measuring the voltage of the single-phase AC output from the output unit 120. In this embodiment, the second detection unit 351 measures the voltage between the twenty-first output connection terminal 321 and the twenty-third output connection terminal 323. Note that the second detection unit 351 may measure the voltage between the twenty-fifth output connection terminal 325 and the twenty-seventh output connection terminal 327, or may measure the voltage between the twenty-ninth output connection terminal 329 and the thirty-first output connection terminal 331.

[0036] The second control unit 352 transmits a signal to the second breaker 353 and the second notification unit 354 when the voltage measured by the second detection unit 351 exceeds a predetermined voltage range. The second control unit 352 is, for example, a microcomputer. The second control unit 352 may be configured by a circuit. For example, when the voltage measured by the second detection unit 351 is 180V or less or 260V or more, the second control unit 352 transmits a signal to the second breaker 353 to command the second input connection unit 310 and the second output connection unit 320 to be cut off. In addition, the second control unit 352 transmits a signal to the second notification unit 354 to command the second notification unit 354 to issue a warning when the voltage measured by the second detection unit 351 is 180V or less or 260V or more.

[0037] The second control unit 352 identifies whether the three-phase AC input to the input unit 110 is a Y-connection or a Δ-connection based on the voltage measured by the second detection unit 351, and transmits a signal to the second notification unit 354 to command the second notification unit 354 to notify the information identifying the Y-connection or the Δ-connection. When the voltage measured by the second detection unit 351 is within a third range, which is a predetermined voltage range, the second control unit 352 determines that the three-phase AC input to the input unit 110 is a Y-connection. In this case, the second control unit 352 transmits a signal to the second notification unit 354 to command the second notification unit 354 to notify the information that the three-phase AC input to the input unit 110 is a Y-connection. In addition, when the voltage measured by the second detection unit 351 is within a fourth range, which is a predetermined voltage range different from the third range, the second control unit 352 determines that the three-phase AC input to the input unit 110 is a Δ-connection. In this case, the second control unit 352 transmits a signal to the second notification unit 354 to command the second notification unit 354 to notify that the three-phase AC input to the input unit 110 is in a Δ connection. The third and fourth ranges are determined based on the voltage of the three-phase AC input to the input unit 110.

[0038] The second breaker 353 is provided between the second input connection unit 310 and the second wiring 340. Specifically, the second breaker 353 is provided between the twelfth input connection terminal 312 and the fifth bus bar 341, between the fourteenth input connection terminal 314 and the sixth bus bar 342, and between the sixteenth input connection terminal 316 and the seventh bus bar 343. The second breaker 353 cuts off the connection between the second input connection unit 310 and the second output connection unit 320 based on the voltage measured by the second detection unit 351. That is, the second breaker 353 cuts off the connection between the input unit 110 and the output unit 120 of the electrical panel 100 based on the voltage measured by the second detection unit 351. The second breaker 353 cuts off the connection between the second input connection portion 310 and the second output connection portion 320 based on a signal transmitted from the second control portion 352, for example, when the voltage measured by the second detection portion 351 is below 180 V or above 260 V.

[0039] 5, the second notification unit 354 is provided on the outer surface of the second housing 370. The second notification unit 354 is, for example, a display. The second notification unit 354 may be provided inside the second housing 370 so as to be visible from outside the second housing 370. The second notification unit 354 may be a light.

[0040] The second notification unit 354 issues a warning when the voltage measured by the second detection unit 351 exceeds a predetermined voltage range. For example, when the voltage measured by the second detection unit 351 is below 180 V or above 260 V, the second notification unit 354 displays a message saying "Voltage Abnormal" based on a signal transmitted from the second control unit 352. When the second notification unit 354 is a light, the light may be turned on in the above-mentioned cases.

[0041] The second notification unit 354 notifies information identifying whether the three-phase AC input to the input unit 110 is a Y connection or a Δ connection, based on the voltage measured by the second detection unit 351. When the voltage measured by the second detection unit 351 is within a third range, the second notification unit 354 displays a message "Y connection" based on a signal transmitted from the second control unit 352. When the voltage measured by the second detection unit 351 is within a fourth range, the second notification unit 354 displays a message "Δ connection" based on a signal transmitted from the second control unit 352.

[0042] An indication that this is a Δ connection is provided on second display unit 360. "Δ connection" is written on second display unit 360. Second display unit 360 is provided inside second housing 370.

[0043] The second housing 370 includes a second window portion 371 and a second plate portion 372 .

[0044] Second window portion 371 is a window provided in second housing 370. Second window portion 371 is provided in second housing 370 so as to make second display unit 360 visible from outside second housing 370.

[0045] The second plate portion 372 is a plate-like member provided on the upper portion of the second housing 370. The second plate portion 372 is provided on the second wiring unit 300 so as to cover the Y-connection display portion 130 of the electrical board 100 and expose the Δ-connection display portion 140 when the second wiring unit 300 is attached to the electrical board 100.

[0046] According to the three-phase power supply switching unit 10 in the first embodiment described above, by mounting the first wiring unit 200 on the electrical board 100, it is possible to convert the Y-connected three-phase AC input to the input unit 110 into single-phase AC and output it from the output unit 120, and by mounting the second wiring unit 300 on the electrical board 100, it is possible to convert the Δ-connected three-phase AC input to the input unit 110 into single-phase AC and output it from the output unit 120. Therefore, using a simple circuit, it is possible to switch between a state in which the Y-connected three-phase AC is converted into single-phase AC and a state in which the Δ-connected three-phase AC is converted into single-phase AC.

[0047] In this embodiment, the detection unit measures the voltage of the single-phase AC output from the output unit 120, and when the voltage measured by the detection unit exceeds a predetermined voltage range, the breaker cuts off the connection between the input unit 110 and the output unit 120 of the electrical panel 100. Therefore, when a single-phase AC with an abnormal voltage value is output from the output unit 120, it is possible to prevent a device connected to the output unit 120 from breaking down.

[0048] In this embodiment, the detection unit measures the voltage of the single-phase AC output from the output unit 120, and the notification unit issues a warning when the voltage measured by the detection unit exceeds a predetermined voltage range. This makes it easier for the user to recognize that the single-phase AC voltage value is being output from the output unit 120.

[0049] Furthermore, in this embodiment, the detection unit measures the voltage of the single-phase AC output from the output unit 120, and the notification unit notifies information for identifying whether the three-phase AC input to the input unit 110 is a Y-connection or a Δ-connection based on the voltage measured by the detection unit. This makes it easier for the user to recognize whether the three-phase AC input to the input unit 110 is a Y-connection or a Δ-connection. This makes it easier for the user to recognize whether a wiring unit suitable for the three-phase AC input to the input unit 110 is attached to the electrical panel 100.

[0050] In the present embodiment, the first display unit 260 having a display indicating that the wiring is a Y connection is provided inside the first housing 270, and the first housing 270 is provided with a first window 271 that allows the first display unit 260 to be viewed from the outside of the first housing 270. Therefore, unlike the case where the first display unit 260 is provided on the outer surface of the first housing 270, even if the paint on the outer surface of the first housing 270 is peeled off, the user can easily recognize that the wiring unit is the first wiring unit 200. Similarly, unlike the case where the second display unit 360 is provided on the outer surface of the second housing 370, even if the paint on the outer surface of the second housing 370 is peeled off, the user can easily recognize that the wiring unit is the second wiring unit 300.

[0051] Furthermore, in this embodiment, when the first wiring unit 200 is attached to the electrical board 100, the Δ connection display portion 140 is covered by the first plate portion 272, and the Y connection display portion 130 is exposed. When the second wiring unit 300 is attached to the electrical board 100, the Y connection display portion 130 is covered by the second plate portion 372, and the Δ connection display portion 140 is exposed. This makes it easier for the user to recognize which wiring unit is attached to the electrical board 100.

[0052] B. Second embodiment: The second embodiment differs from the first embodiment in the configuration of a second wiring unit 300. The configurations of an electrical board 100 and a first wiring unit 200 are the same as those of the first embodiment.

[0053] 6 is a diagram showing an internal configuration of a second wiring unit 300 in the second embodiment. In the second embodiment, the second input connection section 310 of the second wiring unit 300 does not include a seventeenth input connection terminal 317 and an eighteenth input connection terminal 318. That is, the number of input connection terminals included in the first input connection section 210 of the first wiring unit 200 is different from the number of input connection terminals included in the second input connection section 310 of the second wiring unit 300.

[0054] According to the three-phase power supply switching unit 10 in the second embodiment described above, the first wiring unit 200 and the second wiring unit 300 have different numbers of input connection terminals, which makes it easy for the user to distinguish between the first wiring unit 200 and the second wiring unit 300. This makes it possible to prevent the user from erroneously attaching the second wiring unit 300 to the electrical board 100 when a Y-connected three-phase AC is input to the input section 110 of the electrical board 100, and to prevent the user from erroneously attaching the first wiring unit 200 to the electrical board 100 when a Δ-connected three-phase AC is input to the input section 110 of the electrical board 100.

[0055] C. Third embodiment: In the third embodiment, the three-phase power switching unit 10 further includes a second electrical board 101. The current capacity of the second electrical board 101 is larger than the current capacity of the electrical board 100. In this embodiment, the current capacity of the electrical board 100, the first wiring unit 200, and the second wiring unit 300 is equal to each other.

[0056] 7 is a diagram showing a schematic configuration of second electrical board 101. The configuration of second electrical board 101 is the same as that of electrical board 100. In second electrical board 101, the distance between each input terminal is greater than the distance between each input terminal of electrical board 100, and the distance between each output terminal is greater than the distance between each output terminal of electrical board 100. Either third wiring unit 201 or fourth wiring unit 301 is attached to second electrical board 101.

[0057] 8 is a diagram showing an internal configuration of the third wiring unit 201. The configuration of the third wiring unit 201 is the same as that of the first wiring unit 200. The current capacity of the third wiring unit 201 is larger than that of the first wiring unit 200. In the third wiring unit 201, the distance between each of the input connection terminals is larger than that between each of the input connection terminals of the first wiring unit 200, and the distance between each of the output connection terminals is larger than that between each of the output connection terminals of the first wiring unit 200. The distance between each of the input connection terminals of the third wiring unit 201 is equal to the distance between each of the input terminals of the second electrical board 101, and the distance between each of the output connection terminals of the third wiring unit 201 is equal to the distance between each of the output terminals of the second electrical board 101. Each of the bus bars included in the third wiring unit 201 is thicker than each of the bus bars included in the first wiring unit 200.

[0058] 9 is a diagram showing an internal configuration of the fourth wiring unit 301. The configuration of the fourth wiring unit 301 is the same as that of the second wiring unit 300. The current capacity of the fourth wiring unit 301 is larger than that of the second wiring unit 300. In the fourth wiring unit 301, the distance between each of the input connection terminals is larger than the distance between each of the input connection terminals of the second wiring unit 300, and the distance between each of the output connection terminals is larger than the distance between each of the output connection terminals of the second wiring unit 300. The distance between each of the input connection terminals of the fourth wiring unit 301 is equal to the distance between each of the input terminals of the second electrical board 101, and the distance between each of the output connection terminals of the fourth wiring unit 301 is equal to the distance between each of the output terminals of the second electrical board 101. Each of the bus bars included in the fourth wiring unit 301 is thicker than each of the bus bars included in the second wiring unit 300.

[0059] According to the third embodiment described above, the distance between the input terminals of the electrical board 100 is different from the distance between the input connection terminals of the third wiring unit 201 and the fourth wiring unit 301, and the distance between the output terminals of the electrical board 100 is different from the distance between the output input connection terminals of the third wiring unit 201 and the fourth wiring unit 301. In addition, the distance between the input terminals of the second electrical board 101 is different from the distance between the input connection terminals of the first wiring unit 200 and the second wiring unit 300, and the distance between the output terminals of the second electrical board 101 is different from the distance between the output input connection terminals of the first wiring unit 200 and the second wiring unit 300. Therefore, it is impossible to attach the third wiring unit 201 or the fourth wiring unit 301 to the electrical board 100, and it is impossible to attach the first wiring unit 200 or the second wiring unit 300 to the second electrical board 101. Therefore, it is possible to prevent wiring units with different current capacities from being attached to the electrical board 100 and the second electrical board 101.

[0060] D. Other embodiments: (D-1) In the above embodiment, the first wiring 240 and the second wiring 340 are configured from a plurality of bus bars. In contrast to this, the first wiring 240 and the second wiring 340 may be configured from a plurality of cables.

[0061] (D-2) In the above embodiment, the output unit 120 of the electrical board 100 outputs three sets of single-phase AC. In contrast, the output unit 120 may output four or more sets of single-phase AC. For example, the output unit 120 may output a plurality of sets of single-phase AC from the first output terminal 121 and the second output terminal 122 by branching one set of single-phase AC output from the first output terminal 121 and the second output terminal 122. The same applies to the single-phase AC output from the third output terminal 123 and the fourth output terminal 124, and the fifth output terminal 125 and the sixth output terminal 126.

[0062] (D-3) In the above embodiment, the input connection terminal connected to the input terminal and the output connection terminal connected to the output terminal are male terminals provided on the rear side of the wiring unit. In contrast, the input connection terminal and the output connection terminal may be terminals of a screw-type terminal block or a plug-in type terminal block. In this case, the input terminal and the input connection terminal, and the output terminal and the output connection terminal are connected by a cable or the like.

[0063] (D-4) In the above embodiment, the first wiring unit 200 and the second wiring unit 300 are equipped with a control unit. In contrast, only one of the first wiring unit 200 and the second wiring unit 300 may be equipped with a control unit, or neither the first wiring unit 200 nor the second wiring unit 300 may be equipped with a control unit.

[0064] (D-5) In the above embodiment, the first wiring unit 200 includes the first display unit 260. In contrast, the first wiring unit 200 does not have to include the first display unit 260. In this case, the first housing 270 does not have to be provided with the first window portion 271.

[0065] (D-6) In the above embodiment, the second wiring unit 300 includes the second display unit 360. In contrast, the second wiring unit 300 does not have to include the second display unit 360. In this case, the second housing 370 does not have to be provided with the second window portion 371.

[0066] (D-7) In the above embodiment, the electrical board 100 includes the Y connection display unit 130 and the Δ connection display unit 140. However, the electrical board 100 does not necessarily need to include the Y connection display unit 130 and the Δ connection display unit 140.

[0067] E. Other forms: The present disclosure is not limited to the above-mentioned embodiment, and can be realized in various forms without departing from the spirit of the present disclosure. For example, the present disclosure can be realized in the following forms. The technical features in the above-mentioned embodiments corresponding to the technical features in each form described below can be appropriately replaced or combined in order to solve some or all of the problems of the present disclosure, or to achieve some or all of the effects of the present disclosure. Furthermore, if the technical feature is not described as essential in this specification, it can be appropriately deleted.

[0068] (1) According to one aspect of the present disclosure, a three-phase power supply switching unit is provided. This three-phase power supply switching unit includes an electrical board on which either a first wiring unit or a second wiring unit is mounted, the electrical board including an input section to which Y-connected or Delta-connected three-phase AC is input, and an output section for outputting single-phase AC, the first wiring unit including a first input connection section connected to the input section, a first output connection section connected to the output section, and first wiring connecting the first input connection section and the first output connection section such that, when the first wiring unit is mounted on the electrical board, the Y-connected three-phase AC input to the input section is output from the output section as single-phase AC, and the second wiring unit including a second input connection section connected to the input section, a second output connection section connected to the output section, and second wiring connecting the second input connection section and the second output connection section such that, when the second wiring unit is mounted on the electrical board, the Delta-connected three-phase AC input to the input section is output from the output section as single-phase AC. According to this embodiment, a simple circuit can be used to switch between a state in which three-phase AC in a Y connection is converted into single-phase AC and a state in which three-phase AC in a Δ connection is converted into single-phase AC.

[0069] (2) In the above aspect, at least one of the first wiring unit and the second wiring unit may include a control unit, and the control unit may include a detection unit that measures a voltage of the single-phase AC output from the output unit.

[0070] (3) In the above aspect, the control unit may include a notification unit that issues a warning when the voltage measured by the detection unit exceeds a predetermined voltage range. According to this embodiment, it is possible for the user to easily recognize that a single-phase AC voltage value is being output from the output section.

[0071] (4) In the above embodiment, the control unit may include a notification unit that notifies information identifying whether the three-phase AC input to the input unit is a Y connection or a Delta connection, based on the voltage measured by the detection unit. According to this embodiment, it is possible for the user to easily recognize whether the three-phase AC input to the input unit is Y-connected or Δ-connected.

[0072] (5) In the above embodiment, the control unit may include a breaker that cuts off the connection between the input unit and the output unit when the voltage measured by the detection unit exceeds a predetermined voltage range. According to this embodiment, when a single-phase AC voltage having an abnormal voltage value is output from the output unit, it is possible to prevent a device connected to the output unit from breaking down.

[0073] (6) In the above embodiment, the first wiring unit may include a first display portion marked to indicate that the wiring is a Y connection, and a first housing covering the first wiring and the first display portion, the first housing having a first window portion allowing the first display portion to be viewed from outside the first housing, and the second wiring unit may include a second display portion marked to indicate that the wiring is a Δ connection, and a second housing covering the second wiring and the second display portion, and the second housing may have a second window portion allowing the second display portion to be viewed from outside the second housing. According to this embodiment, even if the paint on the outer surfaces of the first housing and the second housing peels off, the user can easily distinguish between the first wiring unit and the second wiring unit.

[0074] (7) In the above embodiment, the electrical board may include a Y-connection display portion marked to indicate a Y-connection and a Δ-connection display portion marked to indicate a Δ-connection, the first wiring unit may include a first plate portion that covers the Δ-connection display portion and exposes the Y-connection display portion when the first wiring unit is attached to the electrical board, and the second wiring unit may include a second plate portion that covers the Y-connection display portion and exposes the Δ-connection display portion when the second wiring unit is attached to the electrical board. According to this embodiment, it is possible for the user to easily recognize whether the first wiring unit or the second wiring unit is attached to the electrical board.

[0075] (8) In the above embodiment, the first input connection portion and the second input connection portion may each be composed of a plurality of terminals, and the number of the terminals provided in the first input connection portion may be different from the number of the terminals provided in the second input connection portion. According to this embodiment, the user can easily distinguish between the first wiring unit 200 and the second wiring unit 300. [Explanation of symbols]

[0076] 10...three-phase power supply switching unit, 100...electrical board, 101...second electrical board, 110...input section, 111...first input terminal, 112...second input terminal, 113...third input terminal, 114...fourth input terminal, 120...output section, 121...first output terminal, 122...second output terminal, 123...third output terminal, 124...fourth output terminal, 125...fifth output terminal, 126...sixth output terminal, 130...Y connection display section, 140...Δ connection display section, 200...first wiring unit, 201...third wiring unit, 210...first input connection section, 211...first input connection terminal, 212...second input connection terminal, 213... 3rd input connection terminal, 214...4th input connection terminal, 215...5th input connection terminal, 216...6th input connection terminal, 217...7th input connection terminal, 218...8th input connection terminal, 220...1st output connection section, 221...1st output connection terminal, 222...2nd output connection terminal, 223...3rd output connection terminal, 224...4th output connection terminal, 225...5th output connection terminal, 226...6th output connection terminal, 227...7th output connection terminal, 228...8th output connection terminal, 229...9th output connection terminal, 230...10th output connection terminal, 231...11th output connection terminal, 232...12th output connection terminal, 240...13th output connection terminal, 1 wiring, 241...first bus bar, 242...second bus bar, 243...third bus bar, 244...fourth bus bar, 250...first control unit, 251...first detection unit, 252...first control unit, 253...first breaker, 254...first notification unit, 260...first display unit, 270...first housing, 271...first window unit, 272...first plate unit, 300...second wiring unit, 301...fourth wiring unit, 310...second input connection unit, 311...eleventh input connection terminal, 312...twelfth input connection terminal, 313...thirteenth input connection terminal, 314...fourteenth input connection terminal, 315...fifteenth input connection terminal, 31 6...16th input connection terminal, 317...17th input connection terminal, 318...18th input connection terminal, 320...2nd output connection portion, 321...21st output connection terminal, 322...22nd output connection terminal, 323...23rd output connection terminal, 324...24th output connection terminal, 325...25th output connection terminal, 326...26th output connection terminal, 327...27th output connection terminal, 328...28th output connection terminal, 329...29th output connection terminal, 330...30th output connection terminal, 331...31st output connection terminal, 332...32nd output connection terminal, 340...2nd wiring, 341...5th bus bar, 342...6th bus bar,343... seventh bus bar, 350... second control unit, 351... second detection section, 352... second control section, 353... second breaker, 354... second notification section, 360... second display section, 370... second housing, 371... second window section, 372... second plate section,

Claims

1. A three-phase power switching unit, comprising: an electrical board on which either the first wiring unit or the second wiring unit is mounted; The electrical equipment panel is an input section to which a three-phase AC current having a Y connection or a Δ connection is input; an output unit for outputting a single-phase alternating current; The first wiring unit includes: A first input connection portion connected to the input portion; a first output connection portion connected to the output portion; a first wiring that connects the first input connection portion and the first output connection portion such that, when the first wiring unit is attached to the electrical equipment panel, a three-phase AC signal input to the input portion through a Y connection is output from the output portion as a single-phase AC signal, The second wiring unit includes: A second input connection portion connected to the input portion; a second output connection connected to the output; and a second wiring that connects the second input connection portion and the second output connection portion so that, when the second wiring unit is attached to the electrical equipment panel, a three-phase AC signal input to the input portion through a Δ connection is output from the output portion as a single-phase AC signal. Three-phase power switching unit.

2. 2. The three-phase power supply switching unit according to claim 1, At least one of the first wiring unit and the second wiring unit includes a control unit, The control unit includes a detection unit that measures a voltage of the single-phase AC output from the output unit. Three-phase power switching unit.

3. 3. The three-phase power supply switching unit according to claim 2, The control unit includes a notification unit that issues a warning when the voltage measured by the detection unit exceeds a predetermined voltage range. Three-phase power switching unit.

4. 3. The three-phase power supply switching unit according to claim 2, The control unit includes a notification unit that notifies information identifying whether the three-phase AC input to the input unit is a Y connection or a Δ connection based on the voltage measured by the detection unit. Three-phase power switching unit.

5. 3. The three-phase power supply switching unit according to claim 2, the control unit includes a breaker that cuts off a connection between the input unit and the output unit when the voltage measured by the detection unit exceeds a predetermined voltage range. Three-phase power switching unit.

6. 2. The three-phase power supply switching unit according to claim 1, The first wiring unit includes: a first display unit having a display indicating that the wiring is a Y connection; a first housing that covers the first wiring and the first display unit, the first housing includes a first window portion that allows the first display unit to be viewed from outside the first housing; The second wiring unit includes: A second display unit having a display indicating that the wiring is a Δ connection; a second housing that covers the second wiring and the second display unit, the second housing includes a second window portion that allows the second display unit to be viewed from outside the second housing; Three-phase power switching unit.

7. 2. The three-phase power supply switching unit according to claim 1, The electrical equipment panel is a Y-connection display unit having a display indicating that the wiring is a Y-connection; A Δ connection display unit that displays a Δ connection, the first wiring unit includes a first plate portion that covers the Δ connection indication portion and exposes the Y connection indication portion when the first wiring unit is attached to the electrical board, the second wiring unit includes a second plate portion that covers the Y-connection display portion and exposes the Δ-connection display portion when the second wiring unit is attached to the electrical board; Three-phase power switching unit.

8. 2. The three-phase power supply switching unit according to claim 1, each of the first input connection portion and the second input connection portion is composed of a plurality of terminals; The number of the terminals included in the first input connection portion is different from the number of the terminals included in the second input connection portion. Three-phase power switching unit.

Images