The utility model provides a circuit is hauled oneself willingly into device secondary voltage fully and is opened income volume auto -change over device. Be equipped with switching value input plug -in components in the device is hauled oneself willingly into fully to the circuit, be equipped with 1 voltage in the circuit, circuit 1 in proper order and jump position, circuit 1 and close position,conversion back voltage, conversion back and jump position and conversion posteroclusion position in switching value input plug -in components, be equipped with logical decision operation executor inthe circuit is hauled oneself willingly into fully, 2 divisions of income volumes in the circuit, 2 voltages in the circuit are jumped the position and are closed the position, and 3 voltages in thecircuit are jumped the position and are closed the position and import through the switching handle with 3 divisions of income volumes in the circuit and haul oneself willingly into the device fully for the circuit. Be it equipped with SK interface 1 to be equipped with the switching handle in the device is hauled oneself willingly into fully to the circuit 20. The utility model discloses a printer switches the handle device hauls oneself willingly into device transformation to the circuit fully, provides the guarantee for the diversification of substation operation mode. It is suitable to the circuit is hauled oneself willingly into device secondary voltage fully and is opened income volume auto -change over device use.