Recommended in systems where there are no heavily deformed currents (check the current THD%, which must be less than the THDIR% of the selected pfc system) nor resonance problems.
SDRW/R MDRW/R LDRW/R
Main 400 Vac 50 Hz THDIL ≤10% (Resonance not allowed)
Capacitors VRC 440 Vac 50 Hz THDIC ≤50%
SDRW/S MDRW/S LDRW/S
Main 400 Vac 50 Hz THDIL ≤15% (Resonance not allowed)
Capacitors VRC 500 Vac 50 Hz THDIC ≤70%