110kV oil-immersed Power Transformer
Rated voltage: 110kV / 121kV / 132kV Rated capacity: 6300kVA ~ 180MVA Application scenarios: Substations, photovoltaic power plants, steel mills, airports, ports, and more. Certifications & Standards: IEC, GB, ANSI/IEEE, NEMA 110kV Three-Phase ……
Rated voltage: 110kV / 121kV / 132kV
Rated capacity: 6300kVA ~ 180MVA
Application scenarios: Substations, photovoltaic power plants, steel mills, airports, ports, and more.
Certifications & Standards: IEC, GB, ANSI/IEEE, NEMA
110kV Three-Phase Oil-Immersed Power Transformer: High Efficiency and Reliable Grid Solution
In response to the rapid global growth in electricity demand, the 110kV three-phase oil-immersed transformer plays a vital role in modern power systems. It is widely applied in national power grids, industrial and mining enterprises, regional substations, power plant step-up stations, and public utility systems. Designed for voltage step-up and step-down operations, it ensures efficient energy transmission and stable power distribution under various environmental conditions.
Technical Performance and Global Application
With a maximum capacity of up to 200 MVA, ZTelec’s 110kV oil-immersed power transformers have proven long-term stability and reliability across more than 50 countries and regions, including Tanzania, Zimbabwe, Ghana, South Africa, Kenya, Zambia, Sudan, Libya, Congo, the UAE, Saudi Arabia, Iraq, Syria, and Bangladesh. These transformers are optimized for grid modernization projects and renewable energy systems, such as photovoltaic step-up substations.
Key Advantages of the 110kV Power Transformer
Standards Compliance: Fully designed and manufactured according to GB, IEC, GOST, EN, NF, ANSI/IEEE standards, with customization available per client requirements.
Certifications: Certified by ISO, CE, IEC, SABS, COC, CSA, and UL, ensuring international quality, safety, and performance compliance.
High Efficiency: The transformer’s energy efficiency exceeds 99%, meeting EU Eco-design Tier 2 (2015/2014/548/EC) standards and reducing operational losses.
Proven Performance: Decades of field operation demonstrate exceptional performance and reliability, with a service life of over 30 years under complex grid conditions.
Eco-Friendly Design: Incorporates FR3 natural ester insulation oil and recyclable materials to minimize carbon emissions, supporting green energy and carbon neutrality goals.
Fast Delivery: Standard lead time is 90 days, with expedited options as short as 50 days to meet project schedules.
110kV Power Transformer Types
ZTelec Electric manufactures a complete range of 110kV power transformers to meet diverse electrical system requirements:
110kV Three-Phase Double-Winding Transformer: Used for standard voltage transformation between primary and secondary systems, providing high insulation and stable output.
110kV Three-Phase Triple-Winding Transformer: Suitable for applications requiring dual secondary voltage levels, such as combined grid and industrial power distribution.
110kV Autotransformer: Compact, high-efficiency design ideal for interconnection between high-voltage networks and grid intertie systems.
Why Choose ZTelec 110kV Transformer
With decades of expertise in transformer R&D and manufacturing, ZTelec Electric delivers custom-engineered oil-immersed transformers that meet global standards and project-specific needs. Whether for national grid expansion, renewable energy integration, or industrial power reliability, our 110kV solutions ensure long-term performance, safety, and energy efficiency.
110kV Power Transformer Technical Parameters
S18-110kV Dual-winding off-grid voltage regulating power transformer |
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| Rated capacity (kva) |
Voltage ratio(kv) | Connection symbol | No-load loss (kw) |
No-load current (%) |
Full-load loss (kw) |
Impedance(%) | ||
| HV | MV Tapping Range | LV | ||||||
| 6300 | 110 121 |
±2×2.5% | 6.3 6.6 10.5 11 |
YNd11 | 9.3 | 0.60 | 36 | 10.5 |
| 8000 | 11.2 | 0.60 | 45 | |||||
| 10000 | 13.2 | 0.55 | 53 | |||||
| 12500 | 15.6 | 0.55 | 63 | |||||
| 16000 | 18.8 | 0.50 | 77 | |||||
| 20000 | 22 | 0.50 | 93 | |||||
| 25000 | 26 | 0.45 | 110 | |||||
| 31500 | 30.8 | 0.45 | 133 | |||||
| 40000 | 36.8 | 0.40 | 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 | |||||
S18-110kV Two-winding on-load tap-changing power transformer |
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| Rated capacity (kva) |
Voltage ratio(kv) | Connection symbol | No-load loss (kw) |
No-load current (%) |
Full-load loss (kw) |
Impedance(%) | ||
| HV | MV Tapping Range | LV | ||||||
| 6300 | 110 121 |
±8×1.25% | 6.3 6.6 10.5 11 |
YNd11 | 10 | 0.60 | 36 | 10.5 |
| 8000 | 12 | 0.60 | 45 | |||||
| 10000 | 14.2 | 0.55 | 53 | |||||
| 12500 | 16.8 | 0.55 | 63 | |||||
| 16000 | 20.2 | 0.50 | 77 | |||||
| 20000 | 24 | 0.50 | 93 | |||||
| 25000 | 28.4 | 0.45 | 110 | |||||
| 31500 | 33.8 | 0.45 | 133 | |||||
| 40000 | 40.4 | 0.40 | 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 | |||||
S18-110kv /132kv Three-winding off-excitation voltage regulating power transformer |
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| 18- | Voltage ratio(kv) | Connection symbol | No-load loss (kw) |
No-load current (%) |
Full-load loss (kw) |
Impedance(%) | |||
| HV | MV | LV | step-up | step-down | |||||
| 6300 | 110 ±8×1.25% |
35 37 38.5 ±2×2.5% or ±5% |
6.3 6.6 10.5 11 |
YNyn0d11 | 11.2 | 0.60 | 47 | H-M 10.5H-L 17-18M-L 6.5 |
H-M 17-18H-L 10.5M-L 6.5 |
| 8000 | 13.3 | 0.60 | 56 | ||||||
| 10000 | 15.8 | 0.55 | 66 | ||||||
| 12500 | 18.4 | 0.55 | 78 | ||||||
| 16000 | 22.4 | 0.50 | 95 | ||||||
| 20000 | 26.4 | 0.50 | 112 | ||||||
| 25000 | 30.8 | 0.45 | 133 | ||||||
| 31500 | 36.8 | 0.45 | 157 | ||||||
| 40000 | 43.6 | 0.40 | 189 | ||||||
| 50000 | 52 | 0.4 | 225 | ||||||
| 63000 | 61.6 | 0.35 | 270 | ||||||
S18-110kV Three-winding on-load tap-changing power transformer |
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| Rated capacity (kva) |
Voltage ratio(kv) | Connection symbol | No-load loss (kw) |
No-load current (%) |
Full-load loss (kw) |
Impedance(%) | |||
| HV | MV | LV | step-up | step-down | |||||
| 6300 | 110、132 ±8×1.25% |
35 37 38.5 ±2×2.5% or ±5% |
6.3 6.6 10.5 11 |
YNyn0d11 | 12 | 0.60 | 47 | H-M 10.5H-L 17-18M-L 6.5 |
H-M 17-18H-L 10.5M-L 6.5 |
| 8000 | 14.4 | 0.60 | 56 | ||||||
| 10000 | 17.1 | 0.55 | 66 | ||||||
| 12500 | 20.2 | 0.55 | 78 | ||||||
| 16000 | 24.2 | 0.50 | 95 | ||||||
| 20000 | 28.6 | 0.50 | 112 | ||||||
| 25000 | 33.8 | 0.45 | 133 | ||||||
| 31500 | 40.2 | 0.45 | 157 | ||||||
| 40000 | 48.2 | 0.40 | 189 | ||||||
| 50000 | 56.9 | 0.4 | 225 | ||||||
| 63000 | 67.7 | 0.35 | 270 | ||||||
