| 摘要 |
PROBLEM TO BE SOLVED: To provide an uninterruptible power supply that makes it possible to improve safety by replacing batteries accurately when required and serviceability to users by using timers which have different measurement timing and period and time advancing rate. SOLUTION: This uninterruptible power supply is provided with arbitrary timers out of a production-finish timer 3 which ticks normally, an operation-hour timer 4, a back-up timer 5 and a temperature change timer 6 which changes a time advancing rate by temperature, and various kinds of times are measured. As a result, the usage conditions of the power supply itself and built-in storage batteries can be known and the serviceability and safety can be improved by clarifying the actual lifetime of the batteries. |
