| 摘要 |
<p>The lead (8) of a working current is associated to a core (3) of which the magnetic induction flux causes, in case of leakage of current, the operation of a circuit-breaker. In this case, an armature (4) of the breaker drops because of the interference of a permanent magnetic field (11) with a field of the magnetic circuit of the breaker produced by the leakage current. The core (3) is wound with several coils around the lead (8) of the working current; this core is also a part of the magnetic circuit (1) of the breaker. </p> |
