Today we will talk about the switching problem of security power supply. First of all, we have three hypothetical initial conditions, as shown in the figure (see attached figure 1 for details). Initial conditions 1-3. Condition 1 is that feeder switches 08, 09, 12, and 13 are in the closed position. Condition 2 is that feeder switches 01, 02, and 03 are in the closed position. Initial condition 3 is that feeder switches 07 and 10 are in the closed position. From the above initial conditions, we know that during initial normal operation, the working PC1 section operates with security MCC1 section, and the working PC2 section operates with security MCC2 section. Generator dual power switching logic copyrigth by:www.hxdlkj.com Switching logic one: jump switch 09, security MCC section 1 loses power, switching logic will instantly jump switch 07, delayed switch 11. In this way, the security MCC section 1 is powered by the working PC section 2, completing a switch. The switch between the two sections is generally 1-2