| 摘要 |
PURPOSE:To prevent a claim of an erroneous charge, by monitoring the supply voltage by a voltage detector, and reading out and storing a data which is stored in the inside and causes a trouble in case of its annihilation, before said voltage reaches operation allowable limit voltage. CONSTITUTION:In a rectifying device RECT for supplying electric power to a switchboard, the voltage immediately before reaching the upper limit and the lower limit of operation allowable voltage of the switchboard is detected by a high and low voltage detector Hi-LoB in addition to a high and low voltage detector Hi-LoA for detecting the upper limit and the lower limit of operation allowable voltage of the switchboard, and the detected information is sent to a central control device CC. When the central control device obtains information from the high and low voltage detector Hi-LoB, its device shifts an accounting data which is accumulated in the internal memory and causes a trouble in case of its annihilation, to a magnetic tape device M/T before the switchboard stops. |
