... production, chemical industry, water treatment, petrochemical industry, and on loads of pump, blower, pumping unit, air compressor, ... pressure balancing of di/dt, valve recanalizing and turn-off.Different current intensities are isolated perfectly. The system ... asynchronous motor (squirrel-cage), synchronous motorStartup frequencyFrequent startup, time space is 10 minutesPower frequency50 Hz /60Hz±2 ...