| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To quickly and reliably detect the removal of connection and prevent an accident due to a reverse power flow without fail through a simple configuration without need for a complicated detecting structure that incurs increase in the number of connecting points. <P>SOLUTION: A power supply device 100 includes: a bypass switch 150 that connects an input plug 120 and an output outlet 126 when some other power supply device is connected upstream of the power supply device; an input current meter 152 that measures the value of current flowing in through the input plug; an internal load 154 that produces a current passed through the input current meter by power from the input plug; and a bypass disconnecting unit 156 that disconnects the bypass switch when the current value measured by the input current meter is equal to or lower than a predetermined value. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
