April 27, 2025
With a tight project schedule, the manufacturer delivered on time, and on-site technical personnel provided guidance throughout the entire installation and commissioning process; the collaboration was highly efficient and hassle-free.
S11 Type Fully Sealed Oil-Immersed Distribution Transformer
1. S: Three-phase; 11: Loss performance serial number; Oil-immersed refers to the transformer body being immersed in insulating oil, serving as insulation and heat dissipation.
2. Execution Standards: GB 1094 (Power Transformers), GB/T 6451 (Technical Parameters of Three-phase Oil-immersed Transformers), etc.
3. Structure and Features: Fully sealed corrugated oil tank, windings, low noise, short-circuit withstand.
4. Applications: Urban power grids, rural power grids, industrial parks, residential distribution; it is the main energy-saving transformer for 10kV distribution networks (altitude ≤1000m; ambient temperature -25℃~+40℃; locations without severe vibration, chemical corrosion, or explosion risks).
5. The S11 type is a mature and economical model; for routine projects, the S11 type offers outstanding cost-effectiveness.
6. Standardized design, special requirements can be customized.
7. Selection and procurement tips:
(1) Clarify capacity, voltage ratio, connection group, voltage regulation range, impedance, and cooling method.
(2) Verify the manufacturer's qualifications and type test report; check the losses and parameters according to GB/T 6451 to avoid non-standard products.
Product Description
S11 Type Fully Sealed Oil-Immersed Distribution Transformer
The S11 Type Fully Sealed Oil-Immersed Distribution Transformer from Lijie Electric Power Technology Group delivers enterprise-grade performance you can trust. This three-phase energy-saving transformer features a fully sealed corrugated oil tank design that eliminates maintenance for up to 20 years. With capacity ranging from 30-3150kVA and voltage levels of 6kV/12kV, it offers significantly reduced no-load loss compared to conventional models. Operating at noise levels below national standards, this transformer serves 10kV distribution networks across urban grids, industrial parks, and residential areas with proven reliability.
What Makes Our Oil-Immersed Transformer Different?
Advanced Energy-Saving Technology
Your power costs matter. That's why our item employments high-quality cold-rolled silicon steel sheets in a consistent coiled center structure. This plan drastically cuts no-load misfortune and current utilization. You'll see the distinction in your operational costs from day one.
True Maintenance-Free Operation
Traditional transformers request consistent consideration. Not our own. The folded fuel tank innovation naturally alters for oil volume changes caused by temperature changes. It separates discuss totally, avoiding oil weakening and separator maturing. You won't require center reviews or schedule support for two decades beneath typical conditions.
Whisper-Quiet Performance
Noise contamination influences your working environment and community. Our moo attractive flux thickness plan, combined with accuracy cover forms and extraordinary vibration lessening measures, keeps electromagnetic clamor well underneath national prerequisites. Your neighbors will thank you.
Built to Withstand Extremes
Short circuits won't take this transformer down. Strengthened mechanical structures, short-circuit safe covered wood cover, and sensible ampere-turn adjust in the windings give uncommon solidness. Deep-filtration transformer oil and anti-aging elastic seals include additional security layers.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | S11 Type |
| Capacity Range | 30-3150kVA |
| Voltage Level | 6kV, 12kV |
| Number of Phases | Single-phase, Three-phase |
| Frequency | 50Hz, 60Hz |
| Voltage Regulation | Non-excitation type |
| Tap Range | ±5%, ±2×2.5% |
| Connection Group | Yyn0 or Dyn11 |
| Cooling Method | Oil-immersed self-cooling |
| Insulation Level | Power frequency: AC-35kV Impulse: L1-75kV |
| Operating Temperature | -25℃ to +40℃ |
| Altitude | ≤1000m |
| Standards Compliance | GB 1094, GB/T 6451 |
Ideal Applications
This S11 Type Fully Sealed Oil-Immersed Distribution Transformer excels in environments where reliability and efficiency matter most:
- Urban Power Distribution Networks – Stable voltage conversion for city infrastructure
- Rural Electrification Projects – Cost-effective power solutions for remote areas
- Industrial Parks – Heavy-duty performance for manufacturing facilities
- Residential Communities – Safe, quiet operation near living spaces
- Commercial Complexes – Consistent power quality for business operations
The sealed design makes it unsuitable only for locations with severe chemical corrosion, explosion risks, or extreme vibration.
Why Partner With Lijie Electric?
Fabricating Excellence
Our two R&D bases in Xuzhou and Nantong span 500,000 square meters. Over 2,000 workers, counting 160+ engineers with progressed degrees, guarantee each transformer meets demanding benchmarks. Yearly deals surpassing 5 billion RMB reflect the believe thousands of clients put in us.
Global Quality Certifications
Your ventures merit certified quality. We hold ISO 9001:2015, CE, UL, and IEC certifications. Each item passes testing by China's National Transformer Quality Supervision and Review Center and Wuhan Tall Voltage Inquire about Institute.
Flexible Customization
Standard plans do not continuously fit one of a kind necessities. Share your particular capacity, voltage proportion, association gather, or impedance needs. Our group customizes arrangements with generation cycles from 6 to 30 days.
Worldwide Benefit Network
We bolster clients over Australia, Unused Zealand, India, Vietnam, Malaysia, Indonesia, Kazakhstan, Egypt, Kenya, and past. You'll get establishment direction, specialized documentation, save parts, and responsive after-sales bolster wherever you work.
Frequently Asked Questions
Q: How long does the product last without maintenance?
A: Under normal operating conditions, this transformer requires no core inspection or routine maintenance for up to 20 years. The fully sealed corrugated tank prevents oil deterioration automatically.
Q: What capacity should I choose for my project?
A: That depends on your load requirements. Our range covers 30-3150kVA. Contact our engineers with your power consumption data, and we'll recommend the optimal capacity for efficiency and longevity.
Q: Can you customize voltage ratios or connection groups?
A: Absolutely. While we offer standard configurations, we customize voltage ratios, connection groups (Yyn0 or Dyn11), tap ranges, and impedance values to match your specifications.
Q: How does this compare to dry-type transformers?
A: Oil-immersed transformers like the S11 typically offer better cooling efficiency and higher overload capacity. They're more cost-effective for outdoor installations and high-capacity applications. Dry-type models work better indoors where fire safety is paramount.
Q: What documentation do you provide?
A: You'll receive technical drawings, operation manuals, test reports, and model registration certificates. All products come with certificates from national testing centers.
Q: Do you provide installation support?
A: Yes. Our team offers installation guidance and technical support. For international projects, we provide detailed instructions and can arrange technical consultations.
Contact Us
Ready to upgrade your power distribution system with S11 Type Fully Sealed Oil-Immersed Distribution Transformer? Reach out to our team at lijieelectrical@gmail.com for customized solutions and competitive quotes today.
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