| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an uninterruptible power supply apparatus notifying whether a function on power supply operates normally or not when a state is changed. <P>SOLUTION: The apparatus includes a forward converter 4 converting AC of a commercial power supply 1 into DC, an inverter 5 converting again the output of the forward converter 4 into AC and supplying power to a load 3, a bypass switching means 9 for continuing power supply to the load 3 from a bypass power supply 1A, an energy accumulating means 8 supplying DC power to the inverter 5 upon power interruption of the commercial power supply 1, a control means 20 for controlling an operation of the apparatus and a storage means 30 for storing waveforms of respective parts. The storage means 30 stores trace data of a trigger signal from a predetermined time before to a predetermined time after in accordance with the trigger signal given from the control means 20. The trigger signal is output when input voltage of the commercial power supply 1 drops or when the bypass switching means 9 is changed over. <P>COPYRIGHT: (C)2010,JPO&INPIT |
