... limiting, over-voltage, under-voltage, overload, open-phase, three phases current unbalance, overheat, communication fault.Unique heat ... and is easy to install.Working Conditions Rated voltageThree-phase AC, 6KV-12KV(+10%, -15%) 50HZWorking voltageNo more ... than 110% of the rated voltageApplication motorthree-phase asynchronous motor (squirrel-cage), synchronous motorStartup frequencyFrequent ...