69kV Oil-Immersed Power Transformer
The 69kV oil-immersed power transformer is designed for high-voltage substations, renewable energy plants,
mining operations, and large industrial power systems. With primary voltage options including 69kV, 66kV, and 63kV,
and secondary voltages such as 33kV, 13.8kV, and 11kV, this transformer provides stable operation, high efficiency,
and long service life for demanding applications.
Key Features
- 69kV oil-immersed power transformer with reliable high-voltage insulation
- Primary voltage range: 69kV / 66kV / 63kV
- Secondary voltage options: 33kV / 13.8kV / 11kV or customized
- Tap changer range: ±8 × 1.25% for accurate voltage regulation
- Available connection types: YNd11, Dyn11, YNd1, Dyn1
- High mechanical strength and low loss design
- Complies with IEC, IEEE, CSA, AS standards
- Rated capacity: 10000 kVA, 12 MVA, 15 MVA
Technical Specifications
| Parameter | Value |
|---|---|
| Primary Voltage Rating | 69kV / 66kV / 63kV |
| Secondary Voltage Rating | 33kV / 13.8kV / 11kV |
| Tap Changer Range | ±8 × 1.25% or customized |
| Connection Types | YNd11, Dyn11, YNd1, Dyn1 |
| Transformer Type | Oil-immersed high voltage transformer |
| Basic Insulation Level (BIL) | Up to 350 kV |
| Standards | IEC, IEEE, CSA, AS |
| Applications | Substations, solar power plants, mining locations |
| Rated Capacity | 10000kVA / 12MVA / 15MVA |
Applications
- High-voltage utility substations
- Solar energy generation stations
- Mining and heavy industrial sites
- Large commercial and industrial loads
Why Choose Our 69kV Oil-Immersed Power Transformer?
- 30+ years of power transformer manufacturing experience
- High efficiency and low operational losses
- Robust insulation and short-circuit resistance
- Full testing before shipment
- Custom design available
Contact us to get detailed quotations, drawings, and customized 69kV transformer solutions tailored for your project.






