The 20/0.4kV Oil Type Distribution Transformer with toroidal mounting is a reliable and energy-efficient solution for medium to low voltage conversion. Designed with robust insulation, high-grade silicon steel, and toroidal core structure, this oil-immersed transformer ensures superior electrical performance, enhanced thermal stability, and extended service life. It’s ideal for residential power grids, industrial facilities, and commercial distribution systems.
This oil distribution transformer is used to step down 20kV voltage to 0.4kV for safe utilization in electrical systems. It conforms to international standards like IEC 60076 and GB/T 6451, ensuring safety, durability, and long-term efficiency.
Technical Specifications
| Parameter | Specification |
|---|
| Rated Voltage (HV/LV) | 20kV / 0.4kV |
| Rated Capacity | 50kVA ~ 2500kVA |
| Cooling Method | ONAN (Oil Natural Air Natural) |
| Frequency | 50Hz / 60Hz |
| Phase | Three Phase |
| Insulation Level | Class A / F |
| Core Type | Toroidal (Ring-Shaped) |
| No-Load Loss | As per IEC 60076 / GB6450 |
| Vector Group | Dyn11 (customizable) |
| Oil Type | Mineral Oil (IEC 60296 standard) |
| Installation Type | Pad-mounted / Floor-mounted / Pole |
| Ambient Temperature | -25°C to +45°C |
| Altitude Limit | ≤1000m (derating above this) |
| Standard Compliance | IEC 60076 / GB/T 6451 / ANSI C57 |
Key Features
- High Efficiency Core: The toroidal core design reduces magnetic leakage and improves performance.
- Oil-Immersed Cooling: Maintains optimal temperature, ensuring longevity under heavy load conditions.
- Compact Design: Toroidal mounting saves space, ideal for urban substations or compact equipment rooms.
- Thermal & Electrical Stability: Handles overloads and thermal expansion with minimal degradation.
- Fully Sealed Tank: Reduces maintenance needs and prevents oil contamination or leakage.
- Noise Reduction: Built with low-noise operation standards for residential and commercial environments.
- Efficient Voltage Conversion: Delivers safe and stable 0.4kV output from a 20kV input.
- Reliable Grid Integration: Ideal for regional distribution networks and substation interfaces.
- Durable in Harsh Conditions: Performs in high humidity, dust, or temperature-fluctuating environments.
Common Questions
Q1: What is the advantage of a toroidal transformer over a traditional EI core transformer?
A1: Toroidal transformers offer better efficiency, lower electromagnetic interference (EMI), and a more compact size. They also reduce no-load losses and are quieter during operation.
Q2: Can this transformer be used in outdoor installations?
A2: Yes. The fully sealed oil tank is corrosion-resistant and weather-proof, suitable for outdoor environments with proper grounding and protection measures.
Q3: Is the transformer customizable for different capacities or voltage ranges?
A3: Absolutely. Depending on your requirements, we can offer custom capacity from 50kVA to 2500kVA, with voltage configurations such as 22/0.4kV, 10/0.4kV, or special vector groups.
