| 摘要 |
PROBLEM TO BE SOLVED: To protect a circuit, etc,. from the short circuit caused by erroneous wiring in a power unit where a plurality of units concerned are coupled with one another to constitute a power module. SOLUTION: The power unit is equipped with an AC input terminal 16 for receiving the input of external AC, an AC input line for connecting an AC input line for adjacent power units with the above AC input terminal 16 in condition that a plurality of power units concerned are coupled with one another, a power circuit 19 for converting external AC into DC and outputting it, and a DC output terminal 17 for outputting the DC output from the above power circuit 19 to outside. The above AC input line has an overcurrent breaker 71 which fuses the line at short circuit of that AC input line, and this overcurrent breaker 71 is constituted with its wiring pattern thinned more than other sections.
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