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Home/Power Transformer/Oil-Immersed Transformer/110kV Oil-Immersed Power Transformer OCTC Double & Three-winding 6.3-180MVA 110kV Oil-Immersed Power Transformer OCTC Double & Three-winding 6.3-180MVA
The Liyond 110kV class power transformer represents the pinnacle of our high-voltage engineering, developed by integrating advanced domestic and international technologies. Designed with a focus on maximum reliability, this series features low loss, low noise, and low partial discharge. These transformers are built to be maintenance-free (no core lifting required) and fully sealed, significantly reducing operational costs while enhancing the economic efficiency and safety of the power grid.
Electrical ProductsKey Structural Features of 110kV Oil-Immersed Power Transformer
Advanced Iron Core: Constructed with high-permeability silicon steel sheets using a full-oblique, multi-step longitudinal joint stacking method to drastically reduce no-load loss.
Optimized Windings: High-strength electrical design ensures excellent resistance to short-circuit impacts and overvoltages.
Superior Tank Design: The “no-core-lifting” structure ensures long-term sealing integrity and reduces on-site maintenance requirements.
Customizable Efficiency: Available in S9, S10, S11 types or even lower-loss customized models to meet specific energy-saving goals.
Main Technical Parameters
Two-Winding Off-Circuit Tap Changer – SF11 Series
| Rated Power (kVA) | HV (kV) | LV (kV) | Connection | No-Load Loss (kW) | Load Loss (kW) | No-Load Current (%) | Impedance (%) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 10,000 | 110/121 ±2×2.5% | 6.3/6.6/10.5/11 | YNd11 | 10.56 | 50.35 | 0.72 | 10.5 | 18,100 |
| 12,500 | 110/121 ±2×2.5% | 6.3/6.6/10.5/11 | YNd11 | 12.48 | 59.85 | 0.72 | 10.5 | 24,200 |
| 16,000 | 110/121 ±2×2.5% | 6.3/6.6/10.5/11 | YNd11 | 15.04 | 73.15 | 0.67 | 10.5 | 26,000 |
| 20,000 | 110/121 ±2×2.5% | 6.3/6.6/10.5/11 | YNd11 | 17.60 | 88.35 | 0.67 | 10.5 | 29,800 |
| 25,000 | 110/121 ±2×2.5% | 6.3/6.6/10.5/11 | YNd11 | 20.80 | 104.50 | 0.62 | 10.5 | 31,500 |
| 31,500 | 110/121 ±2×2.5% | 6.3/6.6/10.5/11 | YNd11 | 24.64 | 126.35 | 0.60 | 10.5 | 37,800 |
| 40,000 | 110/121 ±2×2.5% | 6.3/6.6/10.5/11 | YNd11 | 29.44 | 148.20 | 0.56 | 10.5 | 43,200 |
| 50,000 | 110/121 ±2×2.5% | 6.3/6.6/10.5/11 | YNd11 | 35.20 | 184.30 | 0.52 | 10.5 | 57,600 |
| 63,000 | 110/121 ±2×2.5% | 6.3/6.6/10.5/11 | YNd11 | 41.60 | 222.30 | 0.48 | 10.5 | 63,900 |
Two-Winding On-Load Tap Changer – SFZ11 Series
| Rated Power (kVA) | HV (kV) | LV (kV) | Connection | No-Load Loss (kW) | Load Loss (kW) | No-Load Current (%) | Impedance (%) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 10,000 | 110/121 ±8×1.25% | 6.3 | YNd11 | 11.36 | 50.35 | 0.74 | 10.5 | 19,300 |
| 12,500 | 110/121 ±8×1.25% | 6.3 | YNd11 | 13.44 | 59.85 | 0.74 | 10.5 | 22,500 |
| 16,000 | 110/121 ±8×1.25% | 6.3 | YNd11 | 16.16 | 73.15 | 0.69 | 10.5 | 27,350 |
| 20,000 | 110/121 ±8×1.25% | 6.3 | YNd11 | 19.20 | 88.35 | 0.69 | 10.5 | 32,300 |
| 25,000 | 110/121 ±8×1.25% | 6.3 | YNd11 | 22.72 | 104.50 | 0.64 | 10.5 | 37,300 |
| 31,500 | 110/121 ±8×1.25% | 6.3 | YNd11 | 27.04 | 126.35 | 0.64 | 10.5 | 45,100 |
| 40,000 | 110/121 ±8×1.25% | 6.3 | YNd11 | 32.32 | 148.20 | 0.58 | 10.5 | 53,150 |
| 50,000 | 110/121 ±8×1.25% | 6.3 | YNd11 | 38.24 | 184.30 | 0.58 | 10.5 | 61,300 |
| 63,000 | 110/121 ±8×1.25% | 6.3 | YNd11 | 45.44 | 222.30 | 0.52 | 10.5 | 72,900 |
Three-Winding On-Load Tap Changer – SFSZ11 Series
| Rated Power (kVA) | HV (kV) | MV (kV) | LV (kV) | Connection | No-Load Loss (kW) | Load Loss (kW) | No-Load Current (%) | Impedance (%) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|
| 10,000 | 110/121 ±8×1.25% | 35 | 6.3 | YNyn0d11 | 13.68 | 62.70 | 0.89 | HV-MV 17.5–18.5 HV-LV 10.5 MV-LV 6.5 |
25,700 |
| 12,500 | 110/121 ±8×1.25% | 35 | 6.3 | YNyn0d11 | 16.16 | 74.10 | 0.89 | HV-MV 17.5–18.5 HV-LV 10.5 MV-LV 6.5 |
30,700 |
| 16,000 | 110/121 ±8×1.25% | 35 | 6.3 | YNyn0d11 | 19.36 | 90.25 | 0.84 | HV-MV 17.5–18.5 HV-LV 10.5 MV-LV 6.5 |
36,100 |
| 20,000 | 110/121 ±8×1.25% | 35 | 6.3 | YNyn0d11 | 22.88 | 106.40 | 0.84 | HV-MV 17.5–18.5 HV-LV 10.5 MV-LV 6.5 |
40,100 |
| 25,000 | 110/121 ±8×1.25% | 35 | 6.3 | YNyn0d11 | 27.04 | 126.35 | 0.78 | HV-MV 17.5–18.5 HV-LV 10.5 MV-LV 6.5 |
45,500 |
| 31,500 | 110/121 ±8×1.25% | 35 | 6.3 | YNyn0d11 | 32.16 | 149.15 | 0.78 | HV-MV 17.5–18.5 HV-LV 10.5 MV-LV 6.5 |
52,300 |
| 40,000 | 110/121 ±8×1.25% | 35 | 6.3 | YNyn0d11 | 38.56 | 179.55 | 0.73 | HV-MV 17.5–18.5 HV-LV 10.5 MV-LV 6.5 |
64,900 |
| 50,000 | 110/121 ±8×1.25% | 35 | 6.3 | YNyn0d11 | 45.52 | 213.75 | 0.73 | HV-MV 17.5–18.5 HV-LV 10.5 MV-LV 6.5 |
76,100 |
| 63,000 | 110/121 ±8×1.25% | 35 | 6.3 | YNyn0d11 | 54.16 | 256.50 | 0.67 | HV-MV 17.5–18.5 HV-LV 10.5 MV-LV 6.5 |
86,500 |
*Three-winding SFS11 series (off-circuit) and SZS11 series (on-load) are also available. Please contact us for detailed specifications.*
110kV Two-Winding Power Transformer with Off-Circuit 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 |
±2×2.5% | 6.3 6.6 10.5 11 |
YNd11 | 9.3 | 0.6 | 36 | 10.5 |
| 8000 | 11.2 | 0.6 | 45 | |||||
| 10000 | 13.2 | 0.55 | 53 | |||||
| 12500 | 15.6 | 0.55 | 63 | |||||
| 16000 | 18.8 | 0.5 | 77 | |||||
| 20000 | 22 | 0.5 | 93 | |||||
| 25000 | 26 | 0.45 | 110 | |||||
| 31500 | 30.8 | 0.45 | 133 | |||||
| 40000 | 36.8 | 0.4 | 156 | |||||
| 50000 | 44 | 0.4 | 194 | |||||
| 63000 | 52 | 0.35 | 234 | |||||
| 75000 | 13.8 15.75 18 20 |
59 | 0.35 | 278 | 12-14 | |||
| 90000 | 68 | 0.3 | 320 | |||||
| 120000 | 84.8 | 0.3 | 397 | |||||
| 150000 | 100.2 | 0.3 | 472 | |||||
| 180000 | 112.5 | 0.25 | 532 | |||||
110kV Three-Winding Power Transformer with Off-Circuit 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) | step-down | step-up | |||||
| 6300 | 110 121 ±2×2.5% |
35 37 38.5 ±2×2.5% or ±5% |
6.3 6.6 10.5 11 |
YNyn0d11 | 11.2 | 0.6 | 47 | H-M 10.5H-L 17-18M-L 6.5 |
H-M 17-18H-L 10.5M-L 6.5 |
| 8000 | 13.3 | 0.6 | 56 | ||||||
| 10000 | 15.8 | 0.55 | 66 | ||||||
| 12500 | 18.4 | 0.55 | 78 | ||||||
| 16000 | 22.4 | 0.5 | 95 | ||||||
| 20000 | 26.4 | 0.5 | 112 | ||||||
| 25000 | 30.8 | 0.45 | 133 | ||||||
| 31500 | 36.8 | 0.45 | 157 | ||||||
| 40000 | 43.6 | 0.4 | 189 | ||||||
| 50000 | 52 | 0.4 | 225 | ||||||
| 63000 | 61.6 | 0.35 | 270 | ||||||
Ordering Information
To ensure accurate selection and timely delivery, please provide the following details when placing an order:
Product Model & Type (e.g., SFZ11, SFSZ11)
Rated Capacity (kVA)
Voltage Combinations (HV / MV / LV)
Tapping Range (e.g., ±2×2.5% or ±8×1.25%)
Number of Windings (two-winding or three-winding)
Tap Changer Type (off-circuit or on-load)
Connection Symbol (e.g., YNd11, YNyn0d11)
Frequency (50 Hz)
Optional Accessories (corrugated tank, special bushings, etc.)
Why Choose Our 110kV Oil-Immersed Transformers?
Low Loss & High Efficiency: Reduced no-load and load losses significantly lower operating costs over the transformer’s lifetime.
Low Noise & Low Partial Discharge: Optimized core clamping and advanced insulation design ensure quiet, reliable operation.
High Short-Circuit Strength: Robust winding support and lead structure withstand severe grid disturbances.
Maintenance-Free Design: Fully sealed construction prevents oil degradation and moisture ingress.
Versatile Configurations: Available in two-winding / three-winding, off-circuit / on-load tap changer, and multiple voltage combinations to meet diverse grid requirements.
Proven Reliability: Manufactured under strict quality control and tested to international standards.
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