Provided is a power branching system for driving a plurality of motors by use of a single servo driver, the power branching system capable of protecting each of the motors.The power branching system of the present invention has power lines 15 branched at some midpoint to connect the plural motors 5 and the servo driver 12; a plurality of current sensors 21 provided at branched power lines 15b for detecting currents supplied to the respective motors 5; and controlling means 22 for receiving current data detected by the plural current sensors 21, determining whether or not the detected currents are balanced and generating an alarm signal when the currents are unbalanced.