1 Rated voltage kV 126
           2 Rated current A 1250、1600、2000、2500、3150
           3 Rated short-time withstand current kA    31.5/4s、40/4s
           4 Rated peak withstand current kA 80、100
           5 Rated lightning impulse withstand voltage kV Across open breaks 550+100
           To earth 550                                                                                                                        6 Rated 1min power frequency
           withstand voltage kV Across open breaks 230+70
           To earth 230