High-Capacity 20kV Oil-Immersed Power Transformer from China Suppliers & Factory for Industrial Power Systems
Product Parameter
| Parameter | Specification |
| Rated Capacity | 30kVA – 2500kVA |
| High Voltage | 20kV |
| Low Voltage | 0.4kV (customizable) |
| Frequency | 50Hz / 60Hz |
| Tap Range | ±5% or ±2×2.5% |
| Connection Group | Dyn11 / Yyn0 |
| Cooling Method | ONAN (Oil Natural Air Natural) |
| Insulation Class | Class F / Class H |
| No-Load Loss | 90W – 1800W |
| Load Loss (75℃) | 750W – 23000W |
| No-Load Current | 0.4% – 2.0% |
| Impedance Voltage | 4% – 6% |
| Insulation Level | LI 125kV / AC 50kV |
Product Applications
Medium-Voltage Utility Distribution Networks
The 20kV oil-immersed transformer is widely used in regional power distribution systems where medium-voltage transmission is required. It efficiently steps down 20kV electricity to low-voltage 0.4kV networks, ensuring stable supply for residential areas, commercial districts, and public infrastructure. With efficiency levels reaching up to 98% under rated load, it significantly reduces transmission losses in utility-scale applications.
Heavy Industrial Power Systems
This transformer is suitable for energy-intensive industries such as metallurgy, mining, petrochemical plants, and large-scale manufacturing facilities. It supports continuous operation under heavy load conditions and can withstand short-term overloads of up to 130% of rated capacity, ensuring uninterrupted production processes and minimizing downtime in critical industrial environments.
Large Infrastructure & Renewable Energy Projects
The 20kV transformer is widely applied in infrastructure projects such as transportation systems, airports, and commercial complexes, as well as renewable energy installations like solar farms and wind power stations. It ensures stable voltage regulation and grid integration, operating reliably in harsh environments ranging from -40°C to +45°C, making it suitable for outdoor and remote installations.
Product Advantages
High Operating Efficiency
Optimized internal design supports efficient and stable power transmission performance.
Integrated Structural Design
Compact finished transformer structure ensures durability and reliable operation.
Fully Sealed Protection
Sealed tank structure improves operational reliability and equipment lifespan.
Improved Insulation Reliability
Advanced oil treatment process enhances insulation strength and operational safety.
Stable Mechanical Performance
Robust assembly structure ensures safe transportation and long-term operation.
Wide Capacity Coverage
Suitable for different power distribution systems from small to large capacities.
Key Benefits
The 20kV oil-immersed power transformer is a robust and efficient solution for modern medium-voltage distribution networks. With its high efficiency, strong overload capacity, and long service life, it is widely used in utility systems, industrial operations, and infrastructure projects.
Its combination of reliability, energy-saving performance, and low maintenance requirements makes it a cost-effective choice for long-term power system stability.
FAQ
1. What makes a 20kV transformer different from lower voltage models?
It is designed for medium-voltage distribution systems requiring 20kV input levels, offering higher insulation requirements and improved system compatibility.
2. Can this transformer operate under continuous heavy load conditions?
Yes, it is designed for stable long-term operation and can handle fluctuating loads in industrial and utility environments.
3. Is this transformer suitable for outdoor installation?
Yes, its sealed structure and strong insulation system make it suitable for both indoor and outdoor applications.
4. What type of cooling system is used?
It uses ONAN (Oil Natural Air Natural) cooling, relying on natural oil circulation and air cooling for heat dissipation.
5. Can the specifications be customized for different projects?
Yes, capacity, voltage ratio, tap range, and connection group can be customized based on project requirements.