UNINTERRUPTIBLE POWER SUPPLY UNIT

PROBLEM TO BE SOLVED: To provide an uninterruptible power supply unit which is low in extension cost. SOLUTION: To solve the above problem, this uninterruptible power supply unit capable of parallel connection with a plurality of uninterruptible power supply units is equipped with a battery which supplies power to an apparatus connected with itself at power failure, an inverter which converts the power of the above battery into the power of the apparatus connected with itself, a battery output terminal which supplies power to the inverter of another connected uninterruptible power supply unit from the battery of itself, and a battery input terminal which receives power from the battery of another uninterruptible power supply unit connected to itself. Or, this is equipped with a means which switches the line of power input of the above inverter into either the battery of itself or the battery of another uninterruptible power supply unit connected in parallel. COPYRIGHT: (C)2006,JPO&NCIPI