| 摘要 |
A circuit breaker (10) is provided that includes primary and secondary paths (16, 20) that extend between first and second terminals (12, 14). The primary path extends between the first and second terminals and through a first switch (18). The secondary path extends between the first and second terminals and through a second switch (22) and a semiconductor switching element (XI). During normal operation, a control system (26) maintains the first and second switches in closed position and the semiconductor switching element in blocking state. When a fault condition occurs in the load current, the control system detects the fault condition and sets the semiconductor switching element to conducting state. The control system then sets the first switch to open position such that the load current flows between the first and second terminals through the secondary path. The control system then sets the second switch to open position and the semiconductor switching element to blocking state. |
