Centrally installed switchgear normally means KYN28, or handcart-type switch cabinet, which is used to protect rear transformer, or other high voltage load. Annular net cabinet is mainly used for distribution of high voltage power supply, which separate one circuit or two circuits high voltage power supply to be multi circuits high voltage power supply wire-out.
Centrally installed switchgear is mainly used to high voltage on-load protection. Centrally installed switchgear has air insulation and complete sealing air inflation cabinet. Air insulation is using SF6, and on-load switch is connected through copper lines. Complete seal air inflation cabinet, besides wire-in and wire-out has dedicated connectors; connection between cabinets is in one complete chamber with air that is SF6 gas.