Abstract: In-bore real-time fuze setting via primer is needed to increase the ammunition first round hitting probability of current large or middle caliber gun. The energy isolation system is designed for isolating the setting energy from the primer firing circuit and the firing energy from the setting circuit by establishing the boundary conditions of the isolation system and giving a set of functions that meets the boundary conditions. An energy isolation system for a specific kind of firing energy is designed by setting the parameter values of the functions. The isolation system has been experimentally proved to successfully isolate the firing energy and the setting energy. The firing energy loss on isolation system is very small. Key

Key words: ordnancescienceandtechnology, tankgunammunition, fuzesetting, primercircuit, isolationsystem