| 摘要 |
PURPOSE: An automatic power switch controller is provided to control a voltage range of a main power source and an auxiliary power source by displaying the voltage range on a real time basis. CONSTITUTION: A voltage level detector(140) detects a voltage level of first and second power sources. First and second load side contact points(112,132) respectively supply the first and second power sources to a load side. A first power switching circuit comprises a first relay(105) which supplies the first power source to first and second contact points(106,107). The first power switching circuit comprises the first and second contact points which are arranged into a contact or contactless state by the first relay. The first power switching circuit comprises a second relay(108) which arranges a contact state of the second load side contact point from the contact state of the second contact point.
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