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 Oil-Immersed Transformer 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
