| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a portable backup power supply apparatus which can finish a replacement work of a power supply apparatus easily and quickly, can relieve a burden upon a worker accordingly, can avoid misconnections as possible and, further, can secure a stable and highly reliable backup system for a load. SOLUTION: A battery unit 40, a charger 60 which can be connected to an external AC power supply, converts a voltage of the AC power supply into a DC voltage and supplies the DC voltage to the battery unit 40 as a charging voltage, output terminals 23a and 23b via which a voltage of the battery unit 40 is supplied to an external apparatus, a switching contact 31a which is inserted into a charging circuit between the output terminal of the charger 60 and the battery unit 40, turned on when the battery unit 40 is charged and turned off when the battery unit 40 is not charged, and switching contacts 31b and 31c which are inserted into a power supply circuit between the battery unit 40 and the output terminals 23a and 23b, turned off when the switching contact 31a is turned on and turned on when the switching contact 31a is turned off, are provided.</p> |
