The invention discloses a short-circuit current self-driven current-limiting direct-current
circuit breaker. The short-circuit current self-driven current-limiting direct-current
circuit breaker comprises a short-circuit current self-driven fast switch, a self-induction trigger, a
voltage-limiting energy-absorbing
assembly, a
diode which is in anti-parallel connection with the fast switch, pulse switches which are connected with the
cathode of the
diode, a pulse
capacitor of which one end is connected with one pulse switch, a current-limiting
resistor connected with the other pulse switch and a pulse
inductor of which one end is connected with the other end of the pulse
capacitor. The other end of the pulse
inductor is connected with the
anode of the
diode, one end of a charging
contactor is connected with a positive inlet side of the
circuit breaker, and the other end of the charging
contactor is connected with one end of a fuse; the other end of the fuse is connected to one pole of the pulse
capacitor, and the other end of the pulse capacitor is connected to the negative pole of the circuit breaker through the current-limiting
resistor. According to the present invention, the rapid opening and the commutation current input are realized, and a commutation
assembly is hung on a
system for floating charging after being pre-charged, so that the composition is simple, the structure is novel, the response speed is higher, the disconnection is more reliable, and the
current limiting effect is more prominent.