| 摘要 |
<p>An AC power supply system, in which an AC power supply is constituted by an uninterruptible power supply (51) for converting AC power supplied from an input AC power source into stable AC power, another AC power supply (1) is obtained from the input AC power supply, and power can be supplied from either of said AC power supplies to a load through a switcher. The AC power supply system also comprises means (54,56) which, when a fault occurs while power is supplied from said one AC power supply (51) to the load (8), stops power supply to the load, and causes said other AC power supply (1) to temporarily supply power to the load, means (29,57) which determine whether the fault is caused by an internal factor of said one power supply or by an external factor thereof; and means (27,28) which, when it is determined that the fault is caused by the external factor, restart said one AC power supply so as to switch a current power supply operation to a power supply operation from said one AC power supply.</p> |
