The circuit breaker in the case of the default current to the earth, with protection against the interruption of the conductors of neutral and earth.

摘要

The invention relates to a circuit current breaking in the case of the default to the earth which reacts both to the conditions of interruption of the conductors of neutre13 and terre15, that is the existence of a default to the earth. It is used for this purpose, a secondary winding supplementaire71 on the transformer differentiel29 of a circuit breaker in the case of the default to the earth current. The interruption of the neutral conductor or the earth conductor circulated in the secondary winding microsecond a current which induces a signal of the fraction in the winding secondaire37 of a trigger the opening of a branch conductor contact59 phase11. The control of the contact takes place by means of a thyristor55 and of an electro - aimant57.