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Home/Power Transformer/Oil-Immersed Transformer/110kV Oil-Immersed Power Transformer OLTC Double & Three-winding 6.3-120MVA 110kV Oil-Immersed Power Transformer OLTC Double & Three-winding 6.3-120MVA
The 110kV Oil-Immersed Power Transformer series is engineered for high-stability power distribution in substations and power plants. Featuring a high-quality silicon-steel core with a multi-step laminated structure, these units provide a high-efficiency solution with low loss, minimal noise, and superior short-circuit withstand capacity.
Electrical ProductsKey Features of 110kV Oil-Immersed Power Transformer
High-Efficiency Core Structure: Built with premium silicon-steel sheets and a D-shape yoke with 45° miter joints to optimize magnetic flux and reduce no-load loss.
Enhanced Short-Circuit Protection: Windings utilize interior and exterior support strips with high-tension cardboard cylinders between coils to ensure mechanical integrity during electrical faults.
Reliable Tank Design: Features a bell-type oil tank with a one-piece corrugated wall structure, increasing mechanical strength and preventing leaks during long-distance transportation.
Advanced Workmanship: Incorporates industrial-grade crimp welding technology and phase-assembly processes for consistent electrical performance.
Main Technical Parameters
We offer a comprehensive range of configurations including Double-winding, Three-winding, On-load Tap-changer (OLTC), and Off-circuit Tap-changer options.
110kV Two-Winding Power Transformer with On-Load Tap-Changer
| Rated Capacity (kVA) | Voltage Combination | Connection Symbol | No-load loss(kW) | No-load current(%) | Full-load loss(kW) | Short‑Circuit Impedance (%) | ||
| High Voltage (kV) | HV Tapping Range | Low Voltage (kV) | ||||||
| 6300 | 110 121 |
±8×1.25% | 6.3 6.6 10.5 11 |
YNd11 | 10 | 0.6 | 36 | 10.5 |
| 8000 | 12 | 0.6 | 45 | |||||
| 10000 | 14.2 | 0.55 | 53 | |||||
| 12500 | 16.8 | 0.55 | 63 | |||||
| 16000 | 20.2 | 0.5 | 77 | |||||
| 20000 | 24 | 0.5 | 93 | |||||
| 25000 | 28.4 | 0.45 | 110 | |||||
| 31500 | 33.8 | 0.45 | 133 | |||||
| 40000 | 40.4 | 0.4 | 156 | |||||
| 50000 | 47.8 | 0.4 | 194 | |||||
| 63000 | 56.8 | 0.35 | 234 | |||||
| 75000 | 63.4 | 0.35 | 278 | |||||
| 90000 | 73.1 | 0.3 | 320 | |||||
| 120000 | 91.2 | 0.3 | 397 | |||||
Configuration Options
To meet specific project requirements, we provide tailored solutions for:
Double-winding Transformers: Available with Off-circuit or On-load Tap Changers for standard distribution.
Three-winding Transformers: Ideal for complex power systems requiring multiple voltage levels (e.g., 110kV/35kV/10kV).
Custom Parameters: We can adjust voltage ratios, loss values, and connection symbols based on your site’s technical needs.
Why Choose Our 110kV Solutions?
Global Recognition: Our products have passed the Ministry of Machinery Industry and Ministry of Electric Power’s new product identification.
Proven Durability: Extensively used in power stations and substations with a track record of high user praise.
Precision Engineering: Every unit undergoes a complete set of national type tests and sudden short-circuit tests to ensure field reliability.
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