Abstract
This paper describes the developed direct current circuit breaker with the grid method (DC CBG). The simplified DC CBG was designed and constructed. It comprises the third electrodes, as the grid of a triode, installed between the main contact electrodes. Moreover, the special-designed transformer (SDT) was designed and constructed to supply a damping high-voltage pulse to the grid electrode for suppressing the arc current. The experiment was conducted to verify the performance of the designed DC CBG. Experimental results show that the amplitude of the arc current was significantly reduced by approximately 94% after the damping high-voltage pulse generated from the SDT was applied to the third electrode. Therefore, the proposed DC CBG has the ability to be developed for practical use in the future.
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