철도 차량용 직류 기중차단기의 소호력 예측

Air Circuit Breakers(ACB) interrupt the generated arc within the arc chute to turn off the electricity flowing through the main circuit to prevent from ground fault. Generated arc at the contact should be instantly interrupted through high driving force. In this paper, arc interruption capability have been estimated by exploring the difference in magnetic flux density of driving forces using finite element analysis. In addition, since change in grid shape with in the arc chute influences the formation of inner magnetic field, its effects have been explored to enhance arc interruption capability.