Wuhan Anshan Electricity Co., Ltd.
| Phase | Three |
| Coil Structure | Copper, aluminum |
| Application | Industrial transformer distribution |
| Product name | Power transformer |
| Type | S11, S13 |
| Voltage grade | 10KV |
| Nominal low-voltage | 0.4KV |
| Join groups | Yyn0, Dyn11 |
| Insulation level | LI75AC35/AC5 |
| Volume | 100 250 400 500 1000 2000 2500KVA |
| Coil | Copper wire , Aluminum wire |
| Use | Voltage conversion |
| Rated Primary Voltage | 12 |
| Rated Secondary Voltage | 0.4 |
| Power | 100 200 315 400 630 800 1250 1600 |
| Model Number | S13-M-500KVA 10/0.4KV |
| Brand Name | ZGBTB |
| Place of Origin | Zhejiang, China, Wenzhou |
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Product Specification
| Phase | Three | Coil Structure | Copper, aluminum |
| Application | Industrial transformer distribution | Product name | Power transformer |
| Type | S11, S13 | Voltage grade | 10KV |
| Nominal low-voltage | 0.4KV | Join groups | Yyn0, Dyn11 |
| Insulation level | LI75AC35/AC5 | Volume | 100 250 400 500 1000 2000 2500KVA |
| Coil | Copper wire , Aluminum wire | Use | Voltage conversion |
| Rated Primary Voltage | 12 | Rated Secondary Voltage | 0.4 |
| Power | 100 200 315 400 630 800 1250 1600 | Model Number | S13-M-500KVA 10/0.4KV |
| Brand Name | ZGBTB | Place of Origin | Zhejiang, China, Wenzhou |
| High Light | Fully Sealed Oil Immersed Distribution Transformer ，10KV Oil Immersed Distribution Transformer | ||
The S13-M Series 500kVA Transformer is a high-efficiency, oil-immersed distribution solution designed for modern power grids. Compared to the standard S11 series, the S13 model reduces no-load losses by an average of 25%–30%, significantly lowering operational costs and carbon footprints for industrial and residential utility providers.
Featuring a fully sealed corrugated tank design, the transformer oil is completely isolated from the atmosphere. This prevents moisture and oxygen from entering the tank, eliminating oil degradation and the need for periodic oil filtration or core maintenance. It is the "install-and-forget" solution for medium-voltage (MV) to low-voltage (LV) power conversion.
Ultra-Low Loss Silicon Steel Core: Built with high-permeability, grain-oriented cold-rolled silicon steel. The core is precision-stacked to minimize eddy current losses and significantly reduce audible humming.
High-Purity Oxygen-Free Copper Windings: We use 99.9% pure copper for both high and low-voltage windings. This ensures superior conductivity, high short-circuit strength, and excellent thermal stability under peak loads.
Elastic Corrugated Tank: The corrugated fins act as both a cooling radiator and an expansion vessel. As the oil temperature changes, the elastic expansion of the fins compensates for the volume change, maintaining a permanent seal.
Vacuum Oil Filling: Every unit is filled under high-vacuum conditions to ensure there are no air bubbles in the insulation, preventing partial discharge and extending the transformer's life to over 30 years.
Multi-Stage Surface Protection: The tank undergoes sandblasting, pickling, and phosphating before being coated with a high-durability, weather-resistant finish (RAL 7035/7032) to prevent rust in humid or coastal environments.
| Parameter | Detailed Specifications |
|---|---|
| Rated Capacity | 500 kVA (Customizable 50kVA - 2500kVA) |
| High Voltage (HV) | 10kV / 11kV / 20kV / 33kV / 35kV |
| Low Voltage (LV) | 0.4kV / 400V / 415V / 433V |
| Vector Group | Dyn11 / Yyn0 |
| Tap Range | ±5% or ±2 x 2.5% (Off-Circuit Tap Changer) |
| No-Load Loss | Reduced by ~30% (vs. S11 Standard) |
| Cooling Method | ONAN (Oil Natural Air Natural) |
| Insulation Class | Class A / LI 75 AC 35 |
| Standard Compliance | IEC 60076, IEEE, GB/T 1094 |
Industrial Parks & Factories: Providing stable 400V power for heavy machinery and manufacturing lines.
Residential Urban Grids: Compact footprint allows for installation in basement substations or outdoor pad-mounted kiosks.
Renewable Energy Sites: Stepping down voltage for auxiliary power in solar farms and wind turbine base stations.
Commercial Infrastructure: Reliable power distribution for shopping malls, hospitals, and data centers.
Proven Short-Circuit Withstand: Our designs undergo rigorous simulation and physical testing to ensure the windings stay intact during severe external grid faults.
Precision Tap Changers: Equipped with high-quality off-circuit tap changers that allow for easy voltage adjustment to compensate for local grid fluctuations.
Comprehensive Protection: Standard units include a pressure release valve, oil level indicator, and signal thermometer. Gas relays (Buchholz) are available for units 630kVA and above.
Export-Ready Logistics: Shipped in reinforced steel-frame crates with full technical documentation, including Routine Test Reports and Installation Manuals.
Q: Does a "fully sealed" transformer ever need an oil change?
A: Under normal operating conditions, no. Because the oil never contacts air, it does not oxidize or absorb moisture. The oil is designed to last the entire service life of the transformer.
Q: What is the benefit of the Dyn11 vector group?
A: The Dyn11 connection is superior for handling unbalanced loads and suppressing 3rd harmonics, making it the preferred choice for modern distribution networks with high electronic loads.
Q: Can you provide customized voltage ratios?
A: Yes. We can manufacture transformers with specific primary voltages (e.g., 6.6kV, 11kV, 22kV, 33kV) to match the utility standards of your specific country or region.
Company Details
Business Type:
Exporter,Trading Company
Year Established:
2022
Total Annual:
1000000-2000000
Employee Number:
80~120
Ecer Certification：
Verified Supplier
Wuhan Anshan Electric Co., Ltd. — Your Strategic One-Stop Partner for High-Performance Electrical Solutions. Company Overview: With 20 years of deep-rooted expertise in the electrical industry, Wuhan Anshan Electric Co., Ltd. has evolved into a premier supply chain integrator in China. We d... Wuhan Anshan Electric Co., Ltd. — Your Strategic One-Stop Partner for High-Performance Electrical Solutions. Company Overview: With 20 years of deep-rooted expertise in the electrical industry, Wuhan Anshan Electric Co., Ltd. has evolved into a premier supply chain integrator in China. We d...
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