General :
combination transformer substation is 400-20000kVA outdoor equipment in 35kV high voltage and 0.4-10kV low voltage with three phase AC 50Hz . It is applicable for transmitting, transforming and distributing energy in city, countryside, town, factory, oil field, wharf and some large construction sites. 

Feature :
1.Short period building, less occupied area ,little investment ;
2.Movable, low waste and convenient installation & operation;
3. High reliability;
4. Aluminum alloy sheet (colorful compound sheet) is used for enclosure to prevent from corrosion and sunshine radiation;
5. Fitted with temperature control device and anti-condensation device inside cubicle; 
6. Automatic equipment can be mounted;
7.Optional communication equipment can be mounted;

http://www.villeelectric.com/products.html