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China S11/S13 Oil-Immersed Transformer Manufacturer - High-Quality Copper Transformers from Trusted Suppliers and Factory
Core Product Advantages
1
Outstanding Economic Benefits & Significant Energy Conservation
Compared with the traditional S9 series, the S11 series achieves an average reduction of 30% in no-load loss, a significant decrease of 70%–85% in no-load current, and an additional 15% reduction in total loss compared to national standards. With high-permeability cold-rolled silicon steel core and oxygen-free copper winding, the power conversion efficiency is higher. Each unit can save over 1,000 kWh of electricity annually. Long-term use can help users significantly reduce electricity costs, achieving a win-win situation of green energy conservation and economic benefits.
2
Fully Sealed Design & Extremely Long Service Life
The transformer oil tank adopts a fully sealed structure. The oil tank and flange can be flexibly connected by bolts or welded, ensuring that the transformer oil is completely isolated from the air. This effectively avoids oil oxidation, moisture absorption and deterioration, fundamentally extending the equipment's service life to over 25 years, reducing the frequency of later replacement and maintenance, and lowering the overall investment cost.
3
Process Upgrades & Safety Enhancements
Core components of the oil tank sealing system have been improved and manufacturing processes optimized, significantly enhancing sealing performance and effectively preventing leakage risks. The equipment is equipped with multiple safety protection devices such as pressure relief valves and gas relays, offering excellent fire and explosion resistance. It has passed ISO9001 quality management system certification and national 3C compulsory certification, ensuring stable operation in extreme temperatures ranging from -40°C to 60°C.
4
Compact Structure Design & Space-Saving
The S11-M series exclusively adopts corrugated plate radiators. By utilizing the natural expansion and contraction of the corrugated plates when the oil temperature changes, it replaces the traditional oil conservator function — making the appearance simple and elegant while significantly reducing equipment volume. Product capacity ranges from 10 kVA to 2500 kVA, suitable for mainstream voltage levels of 10 kV / 0.4 kV. Supports customized design, convenient installation and maintenance. Ideal for factories, urban distribution networks, and new energy projects.
Product Specifications
| Rated Capacity (kVA) | Voltage Combination | Connection Group Symbol | No-load Loss (W) | On-Load Loss (kW) 75℃ | No-load Current (%) | Short-circuit Impedance (%) | ||
| High Voltage (kV) | High Voltage Tapping (kV) | Low Voltage (kV) | ||||||
| 30 | 6 6.3 10 10.5 11 |
± 5% ± 2*2.5% |
0.4 | Dyn11 Yno |
100 | 630/600 | 0.80 | 4.0 |
| 50 | 130 | 910/870 | 0.75 | |||||
| 63 | 150 | 1090/1040 | 0.75 | |||||
| 80 | 180 | 1310/1250 | 0.70 | |||||
| 100 | 200 | 1580/1500 | 0.65 | |||||
| 125 | 240 | 1890/1800 | 0.65 | |||||
| 160 | 280 | 2310/2200 | 0.60 | |||||
| 200 | 340 | 2730/2600 | 0.50 | |||||
| 250 | 400 | 3200/3050 | 0.50 | |||||
| 315 | 480 | 3830/3650 | 0.45 | |||||
| 400 | 570 | 4520/4300 | 0.45 | |||||
| 500 | 680 | 5410/5150 | 0.40 | |||||
| 630 | 810 | 6200 | 0.40 | 4.5 | ||||
| 800 | 980 | 7500 | 0.35 | |||||
| 1000 | 1150 | 10300 | 0.35 | |||||
| 1250 | 1360 | 12000 | 0.30 | |||||
Detail Pictures
Frequently Asked Questions
Q
What is the main difference between the S11 series and the traditional S9 series oil-immersed transformer?
The S11 series offers a 30% reduction in no-load loss and a 70%–85% decrease in no-load current compared to the S9 series. It also reduces total loss by an additional 15% beyond national standards, resulting in significantly higher energy efficiency and lower long-term operating costs.
Q
How long is the expected service life of the S11 oil-immersed transformer?
Thanks to its fully sealed oil tank structure that completely isolates transformer oil from air — preventing oxidation and moisture absorption — the S11 series is designed for a service life of over 25 years, significantly reducing replacement and maintenance frequency.
Q
What certifications does the S11 series transformer hold?
The S11 series has passed the ISO9001 quality management system certification and China's national 3C compulsory certification, ensuring it meets strict quality and safety standards for reliable operation in demanding environments.
Q
What capacity range and voltage levels are available for the S11 series?
The S11 series covers a product capacity range from 10 kVA to 2500 kVA. The high voltage levels include 6 kV, 6.3 kV, 10 kV, 10.5 kV, and 11 kV, with a standard low voltage output of 0.4 kV. Customized designs are also supported to meet specific project requirements.
Q
What operating temperature range can the S11 transformer handle?
The S11 series is engineered to operate stably in extreme temperature conditions ranging from -40°C to 60°C, making it suitable for deployment in a wide variety of climatic environments, including cold regions and high-temperature industrial settings.
Q
What are the typical application scenarios for the S11 oil-immersed transformer?
The S11 series is widely used in industrial factories, urban power distribution networks, commercial buildings, and new energy projects (such as solar and wind power installations). Its compact corrugated plate radiator design, combined with flexible installation options, makes it an ideal choice wherever reliable and space-efficient power distribution is required.