| 摘要 |
PROBLEM TO BE SOLVED: To attain high function, miniaturization, and cost reduction of uninterruptive power source system which supplies power to two sets of AC and DC load groups, which receive power from two system AC power sources and need uninterruptive power supply. SOLUTION: Two sets of normal power supply systems 1 and 2, which have the same constitution and function and receive power from two system AC power sources I and II, and a stand-by power supply system 3 which can be substituted for both of the normal power supply systems 1, 2 by switching the power supply line, are installed. For example, the normal power supply system 1 directly sends the AC power from the power source I via an AC switch 11, and charges a battery 14 via an AC-DC bilateral conversion type invertor 13 which receives the directly sent power. When the power source I is in a state of service interrupt or the AC switch 11 is in a state of failure, the battery 14 is used as a power source and the AC conversion power of the invertor 13 is supplied to the AC load 15. When the invertor 13 is in a state of failure, an AC switch 31 is closed, and power supply to the AC load 15 is continued without hit from an invertor 33 which has been in a state of stand-by, instead of the invertor 13. |
