Abstract：The high-speed interrupter in the existing fuse is usually driven by shock wave generated by explosive detonation. There are some defects in the practical application of explosive, such as strong destructive power, high noise and high price. In addition, the structure design of explosive type interrupter is complex, and this type of interrupter is of large volume and heavy weight. Aiming at solving the problems of explosive type interrupter, this paper designs a new type of interrupter scheme, in which the propellant-assisted interrupter (PAI) works by burning. In order to improve the interruption charac-teristics of the new type of PAI, the thermoelectric coupling model and the non-linear dynamic model are established. The chamfering mode of insulation plate and the opening form of the silver sheet are optimized. The test scheme of hybrid current-limiting fuse based on PAI is designed. The interrupting test of the whole machine under the design of diamond and triangular openings is completed, and the test results are compared and analyzed. The experimental results show that the simulation model of the proposed interrupter is correct. Triangular opening can effectively reduce the breaking time of PAI and increase the interrupting arc voltage.
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2020, Vol. 35 
