| 摘要 |
PROBLEM TO BE SOLVED: To provide an uninterruptible power supply system capable of suppressing lowering of a power efficiency according to a decrease in load capacity.SOLUTION: The uninterruptible power supply system 9, connected in parallel to a plurality of uninterruptible power supply units 1a-1e, detects the operating number N of the uninterruptible power supply units 1a-1e feedable to a load 6, detects an output current Iout of the uninterruptible power supply unit 1a, and operates the uninterruptible power supply units 1c-1e to improve power efficiency, on the basis of the operating number N and the output current Iout. |
