CONTROL SYSTEM FOR MAIN CIRCUIT BREAKER AND METHOD FOR CONTROLLING MAIN CIRCUIT BREAKER

摘要

The present invention relates to a main circuit breaker control system capable of minimizing damage or malfunction of an electrical device of a railroad car and a main circuit breaker control method using the same. The main circuit breaker control system comprises a control module controlling opening and closing timing of a main circuit breaker which blocks power supplied to a main transformer of the railroad car from a streetcar line. The control module includes: a sensing unit measuring streetcar line voltage and regular power source of the railroad car; and a monitor control unit calculating a phase angle of the measured streetcar line voltage and determining the opening and closing timing of the main circuit breaker based on the regular power source of the railroad car and contact wear of the main circuit breaker.