... mill, crane, compressor, crusher, conveyer, elevator, centrifuge, rolling mill. Performance CharacteristicsThe device combines series & parallel ... , over-voltage, under-voltage, overload, open-phase, three phases current unbalance, overheat, communication fault.Unique ... than 110% of the rated voltageApplication motorthree-phase asynchronous motor (squirrel-cage), synchronous motorStartup ...