Generator circuit breaker

A generator circuit breaker, comprising:

• a main current branch, a current-limiting transfer branch, a freewheeling branch and a fast switch, wherein
• the main current branch comprises a high-speed mechanical switch S1 and a high-speed mechanical switch S2 in parallel, and two ends of breaks of the high-speed mechanical switch S1 and the high-speed mechanical switch S2 are directly connected with wire outlet ends of the circuit breaker respectively;
• one end of the current-limiting transfer branch is connected in parallel to one end of the main current branch and the other end of the current-limiting transfer branch is connected with the other end of the main current branch via a fast switch S3, and the current-limiting transfer branch comprises a transfer capacitor C, an inductor L, a thyristor component T1, a thyristor componentT2, and a current-limiting resistor R;
• and
• the freewheeling branch is connected in parallel across the main current branch and the current-limiting transfer branch, and the freewheeling branch comprises a thyristor component T3 and a thyristor componentT4.