S11, S13, S20, S22-M Series Oil-Immersed Transformers

Oil-immersed transformers are suitable for power systems with AC 50Hz and rated operating voltage below 10kV, serving as power transformation equipment for central substations and power distribution and lighting loads of industrial and mining enterprises and public institutions.

Capacity Range: 30-2500kVA
Voltage Class: 10kV
Voltage Regulation Method: Off-circuit tap changing; On-load tap changing
Tapping Range: ±5%, ±2x2.5%
Frequency: 50Hz
Number of Phases: Three-phase or single-phase
Connection Group Symbol: Yyn0, Dyn11 or others
Short-circuit Impedance: Standard impedance (see performance parameters)
Altitude less than 1000m, ambient temperature below 40°C. When exceeding the above operating conditions, corresponding adjustments shall be made according to standards.
Cooling Method: Oil-immersed natural air cooling (ONAN)
Insulation Class: Class A
Insulation Level: For 10kV class products, power frequency withstand voltage 35kV, lightning impulse voltage 75kV