The 25/0.4KV Amorphous Core Oil Transformer is a modern energy-efficient distribution transformer designed to meet the growing demand for low-loss and high-performance electrical equipment. It plays a critical role in stepping down 25kV to 0.4kV for industrial and commercial end-users, offering exceptional performance, reliability, and reduced lifecycle cost.
Unlike traditional silicon steel core transformers, this model uses amorphous alloy core material, which significantly reduces core losses, especially under no-load conditions. It is ideal for green power applications, smart grids, and areas where energy conservation is a top priority.
Technical Specifications
| Parameter | Specification |
|---|
| Rated Power | 25 kVA to 1600 kVA |
| High Voltage (Primary) | 25 kV |
| Low Voltage (Secondary) | 0.4 kV |
| Core Type | Amorphous Alloy |
| Cooling Method | Oil Immersed (ONAN) |
| Frequency | 50Hz / 60Hz |
| Phase | 3 Phase |
| Vector Group | Dyn11 / Yyn0 (customizable) |
| Insulation Class | A or F |
| Temperature Rise | ≤ 65°C |
| Impedance | 4% to 6% (based on capacity) |
| Oil Type | Mineral Insulating Oil (IEC 60296) |
| Standard Compliance | IEC 60076, GB1094 |
- Ultra-low No-load Loss: The amorphous metal core reduces core losses by 70% compared to silicon steel core transformers.
- Eco-friendly & Energy Efficient: Complies with energy-saving policies and reduces operating cost over time.
- High Overload Capacity: Designed to handle up to 120% load under forced air cooling.
- Excellent Insulation System: Vacuum oil filling process ensures better dielectric strength and moisture resistance.
- Extended Life Expectancy: Low temperature rise, minimal aging, and strong resistance to thermal stress ensure longer service.
Construction and Materials
- Amorphous Alloy Core: Offers excellent magnetic performance with very low hysteresis loss.
- Copper Windings: High-purity copper windings deliver strong conductivity and low resistance.
- Oil Tank: Corrugated wall design allows for expansion and contraction, eliminating the need for an oil conservator.
- Vacuum Drying & Oil Injection: Ensures insulation purity and better thermal conductivity.
- Anti-corrosion Coating: Designed to withstand outdoor and humid environments.
Frequently Asked Questions (FAQ)
Q1: What are the benefits of using an amorphous core transformer compared to traditional models?
A: Amorphous core transformers have significantly lower no-load losses, helping save energy and reduce CO₂ emissions. This makes them suitable for long-term energy efficiency applications.
Q2: Can the 25/0.4kV transformer be used outdoors?
A: Yes, it is oil-immersed and built with a sealed tank and anti-corrosion protection, suitable for both indoor and outdoor installations.
Q3: How often does the oil need to be changed in this transformer?
A: With proper vacuum oil injection and sealed construction, oil change intervals are extended significantly—typically every 10–15 years under normal conditions.
Application Scope
The 25kV to 0.4kV amorphous Transformador sumergido en aceite is widely used in:
- Renewable energy systems (solar/wind power distribution)
- Industrial manufacturing plants
- Utility substation infrastructure
- Residential and commercial developments
- Government buildings and public lighting networks
- Rural power distribution
