... protection, high reliability b). Perfect protection: input polarity reverse, input over/under voltage, over current, short circuit ... ), stem nodeAlarm functionAC/DC input under abnormal, overload condition and inverter problemsProtection functionAC input or output above or ... resistance> 2MΩ(500VDC)Insulating strength2121VDC(AC input, output to ground, DC input to AC output, without flashover in ...