Improvements in the systems of protection of electrical installations against currents from leak to earth. (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in the protection systems of electrical installations against earth leakage currents, characterized in that the system comprises a circuit for detecting leakage currents and a tripping circuit for cutting the electrical installation of the power network, providing the detection circuit an electrical detection voltage when there is a contact to earth, the trip circuit comprising an electromagnetic relay that can be fed through a sensitive element that is conductive under the effect of the detection voltage, the electromagnetic relay sending the cutting off the supply network of the electrical installation, the trip circuit comprising a power-storage capacitor, connected so that it can be charged by the detection voltage and discharged through the electromagnetic relay, and means for making the element sensitive to the detection voltage constituted by a thyristor when said capacitor has stored enough energy. (Machine-translation by Google Translate, not legally binding)