FT16-40.5 Indoor AC HV Vacuum Load Disconnector and FT16-40.5R Indoor AC HV Vacuum Load Disconnector+Fuse Combined Electrical Apparatus adopt switch elements of vacuum extinction and air insulation. The product is the main element of HXGT16-40.5 indoor AC metal-clad switchgear and DFT16-40.5 outdoor HV cable branch box.