... 1.Have a high voltage, over current and short-circuit and overheat warning device 2.16 bit microprocessors, the intelligent ... with the nearest 0.5 level output voltage, current and frequency and power the power factor watch ... 4 number displayProtection functionover voltage, over current, over temperature, over load, short circuit, and automatic alarmInsulation reactance500Vdc 20MΩPressure ...