... employees,15000 square meter factory Product DescriptionAD22(LED)series of indicator is equally used LED shining chip as light source with ... E, G, H, double color lamp, position indicator, shining buzzer and mini short indicator, as well as design shape of AD22-22G ... : 205kV(AC valid calue), 1min. (2)Insulated resistance≥ 2MΩ (3)Voltage wave allowed by AC indicator± 20% (4)Continual working life≥ ...