Power Transformers
Oil-immersed and dry-type transformers
Engineered for Grid Reliability
Transformers are the critical link between power generation and distribution. Our transformer lineup covers the full spectrum from 100kVA distribution units to 50MVA power transformers, each designed for specific application requirements.
Oil-Immersed Transformers
Oil-immersed transformers offer superior cooling efficiency and are ideal for outdoor installations. Our OFW series achieves ONAN/ONAF cooling configurations with temperature rise ≤55K, ensuring reliable operation in ambient temperatures up to 45°C.
- Capacity: 100kVA to 50MVA
- Primary Voltage: 6kV, 10kV, 35kV, 66kV, 110kV
- Secondary Voltage: 400V, 690V, 10kV, 35kV
- Impedance: Customizable 4-12%
- Efficiency: ≥99% at rated load
Dry-Type Transformers
For indoor applications where fire safety is paramount, our cast-resin dry-type transformers offer Class F/H insulation with zero fire risk. Ideal for hospitals, high-rise buildings, and underground installations.
Transformer Specifications
| Model | Capacity | Primary | Type |
|---|---|---|---|
| OFW-500 | 500kVA | 10kV | Oil |
| OFW-2000 | 2000kVA | 10kV/35kV | Oil |
| OFW-10000 | 10MVA | 35kV | Oil |
| DRY-500 | 500kVA | 10kV | Dry-type |
| DRY-2000 | 2000kVA | 10kV | Dry-type |
| DRY-5000 | 5MVA | 35kV | Dry-type |
Why Transformer Selection Matters
- Impedance: Affects fault current and voltage regulation. Higher impedance limits fault current but increases voltage drop.
- Cooling Method: ONAN for normal loads, ONAF for overload capability. Choose based on load profile.
- Altitude Derating: Above 1000m, cooling efficiency drops. We custom-design for high-altitude installations.
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