Protection The direction of the three three-stage current protection, with low start function; Three reclosing time, with post-acceleration; The direction of zero sequence current blocking zero-sequence overcurrent protection; Low-voltage protection; Low atresia, atresia slip frequency load shedding; Overload warning. Control function Power measurements: voltage, current, active power, reactive power, power factor, frequency, etc. Signal Detection: The device to open into the volume of total 8 Event Storage: event log can store 8 Control functions: to be completed by the hand of a break up co-breaker, remote points away together Accessibility PT control circuit disconnection disconnection warning warning warning device failure Protection and limit setting value and the independent self-tuning and self-diagnostics