Fault detector device in a three-phase network supplying leads by full wave trains

摘要

The fault detection device in a three-phase network for supplying loads comprises: . a first and a second current transformer each associated with a thyristor unit, . a circuit (7) for shifting the phase of the first signal, . means (8) of combining the signal emanating from the phase-shifting circuit (7) and the second signal, . a first amplifier circuit (9), . a rectifier circuit (10), . an integrator circuit (11), . a stage (12) with detection of threshhold beyond which a load imbalance is detected, . and means (14) of checking detection of the imbalance. IMAGE