Fault current protection circuit with remote release

摘要

The circuit has the remote release initiated by electrical contact between signal lines (10,11) associated with an outer line (2) and the neutral line (3) of the protected network, monitored via a sum current transducer (1). Each of the signal lines forms a winding (12) of the sum current transducer and contains a limiting resistance (13), provided by a discrete resistor or by the specific conductivity and the length of the signal line itself.