VLT® dU/dt Filters
dU/dt filters reduce the dU/dt values on the motor terminal phase-to-phase voltage. The phase-to-phase voltage is still pulse shaped.
Compared to sine-wave filters, dU/dt filters cut-off frequencies above the switching frequency.
Having small inductance and capacitance, the filter is cheaper. The filters reduce the motor insulations stress and
arerecommended in applications with risk of flashover.
Range
3 x 200 – 500 V
3 x 525 – 690 V
