| 摘要 |
A tripping coil for a circuit breaker, wherein the circuit breaker is designed to carry high load currents. The tripping coil includes a coil having a first winding and a second winding, a permanent magnet, a return spring, an armature and an actuator rod. The first winding and the permanent magnet produce a magnetic flux to urge and hold the armature into a biased position. The second winding produces a magnetic flux which urges the armature into an unbiased position. The return spring also exerts a force on the armature urging the armature into the unbiased position. The actuator rod is fixed to the armature, and interacts with the circuit breaker such that the circuit breaker is tripped when the armature moves into the unbiased position. |
