English to French Tech/Engineering Electronics / Elect Eng Différentiel de ligne

The unrestrained stage offers fast tripping to low impedance faults were the differential current is above any possible “false” differential currents.
The stage pickup is signalled when the calculated differential current magnitude is higher than the threshold defined in the corresponding stage setting (St1Iop).
A built-in hysteresis between pickup and reset levels guarantees the adequate stability of the function outputs.