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The S11/S13 series oil-immersed distribution transformers are widely used across the globe. Renowned for their exceptional cost-performance ratio, high reliability, and remarkably long service life, they have become a "mainstay" in urban and rural power grids as well as in industrial and commercial power distribution.
Order(MOQ) :
1 UnitsPrice Range :
16,500.00 USD/Unit
The S11/S13 series represents the workhorse of global electricity grids. These oil-immersed transformers feature a hermetically sealed design, where the corrugated oil tank acts as a cooling surface and a flexible expansion chamber. By eliminating the traditional conservator (oil pillow), we prevent contact between the insulating oil and the atmosphere, effectively stopping moisture and oxygen from degrading the oil. This results in a "maintenance-free" operational life exceeding 30 years, making it the most cost-effective solution for rural and urban distribution networks alike.
|
Model Series |
Type |
Capacity Range |
High Voltage |
Vector Group |
Key Feature |
|
S11/S13 |
Distribution |
50 - 2500kVA |
10kV / 11kV |
Dyn11 / Yyn0 |
Hermetically Sealed |
|
HV-33kV |
Step-Down |
1000 - 6300kVA |
33kV / 35kV |
Dyn11 |
Substation Grade |
|
PM-Single |
Pole Mounted |
10 - 167kVA |
7.2kV - 34.5kV |
Single Phase |
CSP Self-Protection |
|
Sealed-Eco |
Eco-Friendly |
100 - 2500kVA |
10kV / 20kV |
Dyn11 |
FR3 Natural Ester |
|
Power-110 |
HV Power |
10 - 63MVA |
66kV / 110kV |
YNd11 |
On-Load Tap Changer |
Maintenance-Free Life: No oil testing or dehydration required for the entire service life.
High Reliability: Compact, fully-sealed structure with superior weather resistance.
Low Operating Cost: S13 models offer up to 25% lower no-load loss than S11, ensuring fast ROI.
Overload Capacity: ONAN natural cooling with optimized oil flow paths for excellent thermal stability.
Urban power distribution networks, factory power systems, agricultural drainage and irrigation stations, and distributed photovoltaic power plants.
Urban power distribution networks
Factory power systems
Agricultural drainage and irrigation stations
Distributed photovoltaic power plants
✔ Zero-Maintenance Hermetically Sealed Structure
Engineered with an advanced corrugated tank that eliminates the need for a traditional oil conservator. This fully sealed expansion system completely blocks ambient moisture and oxygen from contaminating the insulating oil. The result is a highly reliable, truly maintenance-free distribution solution designed to operate continuously for over 30 years without requiring routine oil testing or dehydration.
✔ Exceptional Energy Efficiency & Faster ROI
Optimized to significantly reduce your grid's operational costs. Our premium S13 series utilizes high-grade magnetic core materials, successfully lowering no-load losses by up to 25% when compared to standard S11 models. This superior energy performance guarantees a faster return on investment, making it the most cost-effective choice for large-scale factory power systems and commercial infrastructure.
✔ Superior Thermal Stability for Overload Protection
Designed utilizing optimized ONAN (Oil Natural Air Natural) cooling pathways, the corrugated fins maximize surface area for rapid heat dissipation. This exceptional thermal management ensures the transformer maintains stable operating temperatures even during peak load fluctuations, providing resilient, uninterrupted power for demanding agricultural irrigation stations and distributed photovoltaic plants.
✔ IEC & CE Certified Global Compliance
Manufactured in our ISO-certified facility and rigorously type-tested to meet strict IEC and CE international standards. Whether deployed in harsh rural networks or dense urban power grids, our copper/aluminum wound transformers deliver uncompromising dielectric strength, mechanical robustness, and safe, globally compliant electrification you can depend on.
Our standard export packaging ensures your transformers arrive safely, no matter the destination. (Note: Images demonstrate our standard factory bulk packaging and container loading capabilities).
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Q1: What makes your 11kV oil-immersed distribution transformers "maintenance-free" for 30 years?
Our S11 and S13 series feature an advanced hermetically sealed design that completely eliminates the need for a traditional conservator (oil pillow). In this structure, the corrugated oil tank itself acts as both the cooling surface and a flexible expansion chamber. This prevents the insulating oil from coming into contact with the atmosphere, effectively stopping moisture and oxygen from degrading the oil. As a result, no routine oil testing or dehydration is required, ensuring a highly reliable, maintenance-free operational life exceeding 30 years.
Q2: What is the main difference between the S11 and S13 transformer models for my project?
While both the S11 and S13 models represent highly durable workhorses for global electricity grids, the key difference lies in their energy efficiency and operating costs. The S13 models are engineered with superior core materials that offer up to 25% lower no-load loss compared to the S11 series. If your project—such as a factory power system or a distributed photovoltaic power plant—prioritizes minimizing long-term energy waste and achieving a faster Return on Investment (ROI), the S13 model is the superior choice.
Q3: Can these hermetically sealed transformers handle outdoor installations like agricultural stations or solar plants?
Yes, absolutely. The fully-sealed corrugated structure is not only compact but also provides exceptional weather resistance, making it ideal for diverse outdoor applications. Furthermore, these units utilize ONAN (Oil Natural Air Natural) cooling with expertly optimized oil flow paths, granting them excellent thermal stability and reliable overload capacity. This makes them highly suitable and frequently deployed in demanding environments, including distributed photovoltaic power plants, agricultural drainage and irrigation stations, and expansive rural power grids.
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