Patent ID: 8164866

Claim:
An AC-DC power distribution system comprising: an alternating current (AC) generator for generating multi-phase AC power that is provided to an AC distribution system; at least one electrical load that converts AC power provided on the AC distribution system to direct-current (DC) power; at least one DC content protection circuit breaker connected to monitor the AC current provided to the electrical load to detect the presence of DC content; wherein in response to DC content detected by the at least one circuit breaker, the circuit breaker trips open to disconnect the electrical load from the AC distribution system to prevent DC content from being propagated to the AC generator and/or adjacent loads connected on the AC distribution system; and a DC current blocking (DCCB) module having an input electrically connectable to the AC generator and an output electrically connectable to the AC distribution system, the DCCB module having an inactive state in which the DCCB module represents a short-circuit and an active state in which the DCCB module blocks DC content from propagating into the AC generator, wherein in response to an activate signal the DCCB module is placed in the active state to prevent DC content from being propagated to the AC generator.