DEVICE FOR PROTECTING PEOPLE FROM DIRECT CONTACTS WITH ONE OF THE PHASE CONDUCTORS OF AN ELECTRICAL DISTRIBUTION NETWORK AND FOR PROTECTING AGAINST NEUTRAL CONDUCTOR ISOLATION FAULTS

摘要

P Protection device comprising first and second differential transformers each having a toroidal magnetic core through which pass the neutral and phase conductors of an AC distribution network and a secondary winding, the secondary winding of the first transformer being connected to the input of an amplifier followed by a rectifier, a threshold comparator and a control member capable of triggering a circuit breaker, while the secondary winding of the second transformer is connected to the output of said amplifier, characterized by an auxiliary amplifier, inserted between the output of the first amplifier and the terminals of the secondary winding of the second differential transformer. /P P Application for the protection of an electrical outlet. /P