... uninterruptible power supply incorporating double-converter, single phase input and single phase output. With high efficiency and ... 485),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 flash over in ...