The XGN2-12 box fixed AC metal enclosed switch device (hereinafter referred to as switch cabinet) is applied to the power system with the rated voltage of 3.6～12kV, three-phase AC 50Hz and rated current of 630～3150A to accept and distribute the electric energies. It is especially suitable to be applied to places with frequent operations, and its bus-bar system is the single bus-bar that can derive the single bus-bar with by-pass and the double bus-bar system; therefore it can satisfy the use requirements of various kinds of power plants, transformer substations (stations) as well as the industrial and mining enterprises. 

This switch cabinet satisfies the standard requirements of the national standard GB3906 3-35kV AC Metal Enclosed Switch Device, international standard IEC298 AC Metal Enclosed Switch Device and Control Unit, as well as the DL/T402 and DL/T404, what’s more it has the perfect function of preventing incorrect operations as well as the characteristics of reasonable structure, high safety and reliability, easy operation and convenient overhaul and maintenance. 

The main ZN28A-12, ZN28-12 and ZN□-12（VH1）vacuum circuit breakers, and the disconnecting switches adopt the products such as GN22-10 heavy current disconnecting switches and GN30-12 rotary heavy current disconnecting switches.  

1. Ambient temperature +40oC~-15oC

2. Altitude: Not higher than 1000m, (It can be produced after consulting with the technical department of our company in case of higher than 1000m)

3. Relative humidity:

Average daily relative humidity≦95%;  

Average daily water vapor pressure≦2.2kpa; 

Average daily relative humidity≦90%;  

Average daily water vapor pressure≦1.8kpa 

4. Earthquake intensity: not above M8.0

5. Places without fires, explosion hazards, heavy pollutions, chemical corrosions and strenuous vibrations etc.