Paper presents process of design of the electronic protection systems with utilization of the method of analysis of reliability structures. Utilization of the method of analysis of reliability structures makes possible the enlargement of the values of the reliability coefficients of the designed systems by accomplishment of the analyses and simulations which allow to select of the optimal system structure with regard to the user requirements as well as the characteristics of the protected object (e.g. location of the protected objects in terrain, distances between buildings).