APPARATUS FOR PREVENTING EXCITING INRUSH CURRENT AND EXCITING OVER-CURRENT IN PROCESS FOR APPLYING INITIAL POWER TO TRANSFORMER AND CONTROLLING METHOD THEREOF

摘要

PURPOSE: An apparatus for preventing exciting inrush current and exciting over-current in a process for applying initial power to a transformer and a controlling method thereof are provided to interrupt the remaining power and economize the electric energy by controlling automatically the output voltage without generating the exciting inrush current and the exciting over-current. CONSTITUTION: An apparatus for preventing exciting inrush current and exciting over-current in a process for applying initial power to a transformer includes a voltage and phase detector(1), a controller(31), and a microprocessor(30). The voltage and phase detector is used for detecting the initial power of the transformer. The controller is used for controlling a phase control wire. The exciting inrush current and the exciting over-current are removed by applying a phase control method using a magnetic field saturation method and a magnetic resonance method.