1 Overview 　　The Cubicle is of HV current-regulation fuse and vacuum contact loop, which is used for 3~6kV system such as control motor, protective transformer, OC capacitor and so on. It is generally used for control circuit of motor for rated power up to 1200kW ad transformer for rated capacity up to 1600kW. The Cubicle abides to standards GB3096-91, IEC-632-1 and IEC62271-200. 2 Service and Installation Conditions 　　Ambient temp. -15℃~+40℃ 　　Elevation≤2000m 　　Moisture: Daily average≤95%, Monthly average≤90% 　　Seismic intensity: 8° 　　The ambient environment should be without obvious pollution, such as corrosive or flammable gas or steem, and etc. 　　Additional consultation between the user and the manufacturer should be needed, if the switchgear is to be operated in the conditions not in conformity with the above ones.