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China S11/S13 Oil-Immersed Transformer Suppliers | High-Quality Copper Transformer from Factory
Core Product Advantages
1. Outstanding Economic Benefits
Compared with the traditional S9 series, the S11 series has an average reduction of 30% in no-load loss, a significant decrease of 70% to 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.
2. Fully Sealed Design
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.
3. Process Upgrades & Safety
Core components of the oil tank sealing system have been improved and manufacturing processes optimized, significantly enhancing sealing performance. Equipped with multiple safety protection devices such as pressure relief valves and gas relays. It has passed ISO9001 and national 3C certification, ensuring stable operation from -40°C to 60°C.
4. Compact Structure Design
The S11-M series exclusively adopts corrugated plate radiators. By utilizing natural expansion and contraction of corrugated plates, it replaces the traditional oil conservator. This reduces equipment volume and occupied area. Product capacity ranges from 10 kVA to 2500 kVA, suitable for 10 kV/0.4 kV mainstream scenarios.
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
Q1: What is the expected service life of the S11 series oil-immersed transformer?
A: Thanks to its fully sealed design which isolates oil from air to prevent oxidation, the S11 series has a service life exceeding 25 years with minimal maintenance required.
Q2: How does the S11 series compare to the traditional S9 series in terms of energy savings?
A: The S11 series reduces no-load loss by an average of 30% and no-load current by 70%-85%, significantly lowering annual electricity costs for the user.
Q3: Can this transformer operate in extreme weather conditions?
A: Yes, the equipment is designed and certified to operate stably in extreme temperatures ranging from -40°C to 60°C, ensuring reliable power transmission in various climates.
Q4: What safety certifications do these transformers hold?
A: Our transformers have passed the ISO9001 quality management system certification and the national 3C compulsory certification, meeting high safety and quality standards.
Q5: Is customization available for specific project needs?
A: Yes, we support customized designs for different capacities (10 kVA to 2500 kVA) and voltage levels to suit factories, urban networks, and new energy projects.
Q6: Why is the corrugated plate radiator design beneficial?
A: The corrugated plates handle oil expansion and contraction naturally, eliminating the need for a traditional oil conservator, which results in a more compact and space-saving structure.