11kV SF6 insulated ring main unit, a common tank SF6 gas insulated metal-enclosed switchgear, is composed of load break switch unit, load break switch fuse combination unit, circuit breaker unit, vacuum circuit breaker unit and bus bar inlet line unit. It is widely used in the distribution substation and box-type substation of urban residence districts, high-rise building, large scale public buildings, enterprises and so on. Load break switch unit includes monomer, monomer double-sleeve bushing, standard type of two-unit, three-unit, four-unit and side sleeve bushing. It uses the structures of SF6 gas tank and there is no need of external bus bar connection among all units, so its structure is relatively simple for installation and much more safely. Although it uses gas tank integrated structure, there is still independent interval on every unit. sales05 AT usadnk DOT com