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>> Product Introduction
The 11kV three-phase oil-immersed distribution transformer is a robust and efficient solution for stepping down medium-voltage power to usable low-voltage levels in electrical distribution networks. Designed for reliability, it features a durable tank filled with insulating oil for effective cooling and insulation. With high efficiency, low losses, and excellent overload capacity, it ensures stable performance in utility, industrial, and commercial applications. The transformer complies with international standards (IEC, IEEE) and offers options for ONAN or KNAN cooling. Its compact design, corrosion-resistant construction, and low maintenance requirements make it ideal for outdoor installations, providing long-term power distribution reliability.
Product Advantage
1.High Efficiency & Low Losses
Our 11kV oil-immersed distribution transformer features advanced core design with high-grade CRGO silicon steel, ensuring up to 99% efficiency and reduced no-load losses (as low as 0.5%). Compliant with IEC 60076 & IEEE C57.12.00, it minimizes energy waste, lowering operational costs for utilities and industries.
2.Robust Cooling & Overload Capacity
Equipped with ONAN/KNAN cooling technology, the transformer maintains stable performance even under 150% short-term overload. The high-quality insulating oil ensures optimal heat dissipation, extending service life in harsh environments.
3.Durable & Low-Maintenance Design
Featuring a corrosion-resistant tank, sealed construction, and moisture-proof windings, this transformer requires minimal upkeep. Its 30-year design lifespan reduces long-term replacement costs, ideal for rural and urban distribution networks.
4.Smart Monitoring & Safety Compliance
Optional IoT-enabled sensors (temperature, oil level, load monitoring) enhance predictive maintenance. Meets safety standards with pressure relief mechanisms for risk-free operation.
>> Technical Parameters
| Type | Three Phase Oilimmersed Distribution Transformer |
| Model | S11~20 |
| lnstallation | Outdoor |
| Altitude | ≤1000m |
| Rated Power | 2000KVA or others |
| Cooling Method | ONAN/KNAN |
| Primary Voltage | 11KV |
| Secondary Voltage | 433V or others |
| Rated Frequence | 50HZ |
| Insulation oil | Mineral oil |
| Tapping Range | ±2×2.5% |
| Temperature rise℃) | 65 |
| Connection Group | Dyn11 |
| Impendace(%) | 4.58% |
| Total weight(kg) | 5170 |
>> Product Uses
1.Urban Power Distribution Networks
Widely used in city substations and ring main units (RMUs) to step down 11kV to 400V or other voltage for residential/commercial use. Its compact design fits space-constrained urban installations while meeting high safety standards for populated areas.
2.Industrial Power Supply
Ideal for factories, plants and mining sites requiring stable medium-voltage distribution. The robust oil-cooled design handles heavy machinery loads and voltage fluctuations effectively.
3.Renewable Energy Integration
Commonly installed in solar/wind farms to connect renewable generation to the grid. Provides reliable voltage transformation with high tolerance for intermittent power inputs.
4.Rural Electrification Projects
Perfect for remote areas due to its durability and minimal maintenance needs. Operates reliably in harsh weather conditions with wide temperature variations.
5.Infrastructure Developments
Essential for airports, railways and ports requiring uninterrupted power. The oil-immersed design ensures stable operation for critical infrastructure applications.
>> Product Operate Guide
Generic installation and use instructions for distribution transformer, containing the following sections:
1.Transportation
2. Deliverable check
3.Storage
4. Installation Enviornment Requirements
5.Electrical Installation
6.Common components
7.Common operation
8.Fuse installation
9.DC resistance
10. Pessure resistance
11. Transformer ration
12.Power-on opeartion
13.Power-off repair
14.General maintenance
15.Component maintenance
16.Component replacement
17.Transformer troubleshooting
18.Table of tightening torque
Product Video
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