... fans, pumps, compressors, mills, conveyors and lifts 1. Variable Frequency Drive characteristicsVFD is a masterpiece of outstanding performance and ... , 11 kV output, no output up-transformer required. Integrated dry type phase-shifting transformer design. The user only connects input/ ... operating when one or two power cells are in failure. Auto re-start [OPTIONAL FUNCTION, FREE] after the recovery ...