First, the model: GN19-10 / 400A GN19-10C / 400A GN19-10 / 630A GN19-10C / 630A GN19-10 / 1000A GN19-10 / 1250A GN19-10C / 1250A GN19-10 within (C) series indoor AC high voltage isolation switch for AC 50Hz, rated voltage of 12kV and below the power system, equipped with Human operating mechanism, as there is voltage at no load conditions, the use of electrical division, also derived pollution prevention, plateau and installation of electric display devices. GN19-10 series of high-voltage isolation switch with a safe, reliable, lightweight, flexible features. Electrical and mechanical properties of the product in line with the national standard GB1985 "AC high voltage disconnectors and earthing switches" requirements.