| 摘要 |
PURPOSE:To provide an electric power device, in which the supply of power to load is not stopped to transiently generated overload. CONSTITUTION:In an electric power device jointly having a function converting the power of an AC input power supply 10 into power by a power translating equipment and supplying load with electricity and a function capable of changing over power to power from a battery 15 and continuously supplying load with electricity at the time of the abnormality of the AC input power supply 10, a changeover means 17 alternately changing over feed to feed from the battery 15 and feed from the AC input power supply 10 periodically at the time of the normalcy of the AC input power supply 10 and a storage means 16, in which the transient output fluctuation of the electric power device at the time of the changeover is stored successively, are provided. A comparison means 18 comparing the allowable value of transient output fluctuation and transient output fluctuation stored in the storage means 16 and a display alarm means 19 displaying the result of the comparison means 18 are provided. |
