| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that there are too many parts because protective function parts in a power source with both a commercial power supply and an inverter device as a load supply are provided separately from each other. SOLUTION: A switching device is provided on the output side of a current transformer on one of inverter operation side and commercial operation side. The output of a current transformer on the other side is supplied to the switching device. The switching device is structured so as to be switched at power switching. Thus, another protective function part can be eliminated on the other side. |
