Rated capacity: 20MVA; Rated voltage and tapping range: 35±3x2.5%/10.5kV; Rated frequency: 50Hz; Cooling method: AN; phase: 3-phase: Vector group: Yd11; Insulation level: HV wiring terminals: LI/AC 170/70 LV wiring terminals: LI/AC 75/35 Main property of the product: Impedance voltage: 10%, with stipulated tolerance in national standard; No-load loss: 21kW; No-load current: 0.3%; Load loss: 85kW; Total loss: 106kW Insulation and thermal resistance: H grade; the temperature rise is designed at F level, coil<100K, Noise level: ≤62dB (1m) Partial discharge: ≤10pC