S11/S13 Series | Three Phase Oil Filled Transformer | 10kV / 11kV / 20kV / 33kV | Customized
Three Phase Oil Filled High Voltage Transformer is designed for reliable power transformation in industrial plants, substations and large-scale electrical systems. The oil-filled structure provides effective insulation and heat dissipation for continuous operation. High-voltage and low-voltage configurations can be customized according to project requirements. Key Features: S11 / S13 series 10kV / 11kV / 20kV / 33kV HV 220V / 380V / 400V / 800V LV available 50Hz / 60Hz IEC 60076 CE / ISO Customized capacity and voltage Applications: Factories, substations, industrial plants, solar projects and power distribution systems. Send us your capacity and HV/LV voltage for a customized quotation.
Reliable Power Transformation for Industrial and Distribution Applications
Our Three Phase Oil Immersed Transformer is designed for reliable voltage transformation and power distribution in industrial facilities, substations, commercial buildings, utility networks and other medium-voltage applications.
The transformer uses insulating oil for electrical insulation and heat dissipation, making it suitable for continuous operation and high-load power distribution applications.
With customized voltage ratios, rated capacity, vector groups, impedance and accessories available, the transformer can be configured according to the requirements of different power systems and projects.

Looking for a transformer for your project? Send us your voltage, capacity and application requirements for a customized recommendation.
For medium- and high-capacity power distribution applications, oil-immersed transformers provide an efficient method of insulation and heat dissipation.
The transformer oil surrounds the core and windings, helping transfer heat away from the active components during operation.
Designed for Continuous Power Operation
The oil-immersed structure is particularly suitable for:
Industrial plants
Utility distribution
Substations
Commercial power systems
Mining projects
Renewable energy projects
Large machinery and production facilities
Oil-immersed distribution transformers are widely used in industrial and utility power distribution, with manufacturers commonly offering configurations up to medium-voltage levels such as 36 kV.
The Three Phase Oil Immersed Transformer can be configured for different power distribution requirements.
🏭 Industrial Plants
Provides voltage transformation for factories, production lines and heavy electrical equipment.
⚡ Substations
Suitable for medium-voltage distribution systems and substation applications.
🏢 Commercial Buildings
Provides reliable power transformation for large commercial and infrastructure facilities.
☀️ Renewable Energy Projects
Can be configured for suitable solar, energy storage and renewable power distribution applications.
⛏ Mining & Heavy Industry
Suitable for demanding environments where reliable power distribution and continuous operation are required.
Need a transformer for a specific project? Tell us the application and electrical requirements, and our engineers can recommend the appropriate configuration.
| Parameter | Specification |
|---|---|
| Product Type | Three Phase Oil Immersed Transformer |
| Rated Capacity | Customized according to project |
| HV Voltage | Customized |
| LV Voltage | Customized |
| Frequency | 50Hz / 60Hz |
| Phase | Three Phase |
| Cooling Method | ONAN / ONAF, according to design |
| Vector Group | Dyn11 / Yyn0 / Yd11 / Customized |
| Winding Material | Copper / Aluminum |
| Insulating Oil | Mineral oil / other options according to requirement |
| Impedance | Customized according to project |
| Tap Range | Customized |
| Installation | Indoor / Outdoor according to model |
| Standard | IEC / IE60076/ Customer Specification |
Typical Configuration
Depending on the project, configurations may include:
10kV / 0.4kV
11kV / 0.4kV
20kV / 0.4kV
35kV / 0.4kV
Other voltage ratios according to project requirements
Please note: Voltage, capacity, vector group and other parameters should be confirmed according to the actual electrical system before quotation.
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Factory Tested · Project Ready
Manufactured according to agreed technical requirements and IEC 60076 standards.
We can customize:
Capacity · HV/LV Voltage · Vector Group · Impedance · Tap Range
Send us your:
Capacity + HV Voltage + LV Voltage + Application
You can also send your technical specification or SLD.
Get a Customized Recommendation & Quotation