AUTOMATIC POWER CUTOFF APPARATUS

摘要

PURPOSE: An automatic power cutoff apparatus is provided to reduce a power consumption and influence of magnetic interference. CONSTITUTION: An automatic power cutoff apparatus comprises a current sensing unit(13) for sensing the current flowing through the wire; a load change sensing unit(14) for sensing the load change of the wire; an output unit(12) for turning on/off the power being supplied to the wire; a storing unit for dividing the value of the current sensed by the current sensing unit at n-time intervals(wherein n is an integer larger than 2), and storing the value divided at the time intervals; a set unit for setting the range of the minimum current value in the (n-1)th time interval stored in the storing unit; and a process unit for controlling the output unit to turn off the power when the n-th current value sensed by the current sensing unit falls in the range of the (n-1)th minimum current value set by the set unit, and controlling the output unit to turn on the power when the change of load sensed by the load change sensing unit exceeds the range of the (n-1)th minimum current value set by the set unit.