1. Standards: IEC60076, GB1094-1996; JB/T10088-2004; GB/T6451-2008; 
2. Voltage Grade: 13.8KV,15kV
3. Voltage Regulation Method: Off circuit tap changing or on load tap changing
4. Tapping Range: ±5%, ±2×2.5%, ±4×2.5% or others
5. Frequency: 50Hz; 60Hz
6. Phase: Three phase
7. Vector Group: Yyn0, Dyn11 or others
8. Short Circuit Impedance: Standard impedance (For details see technical data sheet)