... .Wave distortion: <1%,6.Isolation transformer output, safe and credible,7.Auto-protection and alarm for output overvoltage, over current, overheat ... voltage, over current, over temperature, over load, short circuit, and automatic alarmInsulation reactanceAbove 500Vdc 20MΩPressure endurance insulation1800Vac/5Ma/1minuteCooling device ...