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盧彰注,洪淳一,兪春植 釜山工業大學校 1984 論文集 Vol.26 No.-
The Authors studied how effectively the arcs are suppressed when the contactors are opened at current zero point which exists indispensively in AC current. In order to increase the suppressing effect in large current, the Authors also sutdied the effect when auxiliary contactors containing some resistance are connected with main ones and suggest how to determine the optimal value of resistance. According to the researched results, the Authors carried out the opening experiment of actual 3 phase current, 150A, 440V on the starting state of 5PH induction motor and confimed that the arcs of well adjusted phase currents are suppressed but others not so. The Author get the firm belief that if we construct in accurate mechanism, separate the contactors gear for each phase, and use the devices contrived by the Authors, the arcs of switch gear will be remarkably suppressed.