110 kV 10-300 MVA Power Transformer Features
This 110 kV three-phase oil-immersed high voltage power transformer, with a power rating ranging from 10 MVA to 300 MVA, is engineered for large-scale industrial, commercial, and utility applications. Designed to step down high voltages safely and efficiently, it features a 110 kV Delta-connected primary and customizable secondary voltages (such as 13.8 kV, 33 kV, 480V, etc.). The transformer utilizes high-efficiency silicon steel cores and mineral oil insulation to minimize energy losses and optimize thermal performance, even under demanding operational conditions. Housed in a weatherproof, tamper-resistant enclosure, it is built for reliable outdoor substation installations. Meeting global standards like ANSI, IEEE, UL, CSA, and DOE, this transformer offers durable, long-lasting performance for power distribution in utility grids, industrial sites, and renewable energy projects.
110 kV 10-300 MVA High Voltage Power Transformer Technical Specs
| No. | Item | Specification | Remark |
|---|---|---|---|
| 1 | Power Rating | 10 MVA to 300 MVA | Customizable based on project requirements |
| 2 | Primary Voltage | 110 kV (Delta connection) | Standard primary voltage configuration |
| 3 | Secondary Voltage | 13.8 kV, 33 kV, 480V (Customizable) | Secondary voltage options available per application |
| 4 | Phase | Three-phase | Operating at 60 Hz frequency for stability |
| 5 | Cooling Type | ONAN (Oil Natural Air Natural) | Efficient oil-based cooling for long-lasting performance |
| 6 | Core Material | High-efficiency silicon steel | Designed for low-loss, enhanced thermal efficiency |
| 7 | Insulation | Mineral oil | Ensures optimal thermal performance and prevents overheating |
| 8 | Temperature Rise | 65°C | Industry-standard temperature rise for safe operation |
| 9 | Enclosure | Weatherproof, tamper-resistant | Designed for outdoor substation installations in diverse climates |
| 10 | Standards Compliance | ANSI C57.12, IEEE, UL, CSA, DOE efficiency | Meets international safety and performance standards |
| 11 | Certifications | UL Listed, cUL, CSA, CE, SGS | Recognized certifications for global safety and quality assurance |
| 12 | Connection Options | Delta – Grounded Wye (standard), Wye – Wye, Delta – Delta, Wye – Delta | Multiple connection options to suit diverse grid configurations |
| 13 | Applications | Utility grid connections, industrial power distribution, substations, commercial facilities | Ideal for energy infrastructure projects and large-scale power needs |
| 14 | Protection Features | Overcurrent protection, surge protection, temperature monitoring | Built-in safety features to prevent damage under abnormal operating conditions |
| 15 | Dimensions & Weight | Customizable based on transformer capacity and design | Size and weight vary depending on MVA rating and specifications |
| 16 | Operational Efficiency | Designed for high efficiency with low operating costs | Minimizes energy loss, reduces operational expenses, and enhances environmental sustainability |
| 17 | Transport & Installation | Designed for ease of transport and installation in remote or urban locations | Equipped with features to facilitate safe handling and quick deployment in diverse environments |
| 18 | Ambient Temperature Range | -20°C to +50°C | Capable of operating in a wide range of environmental conditions, suitable for both North and South America |
| 19 | Total Losses (at Rated Load) | 1.2% – 1.5% of rated power | Low losses for improved efficiency and reduced operational costs |
| 20 | No-Load Loss | 0.2% – 0.5% of rated power | Ensures reduced energy consumption during no-load conditions |
| 21 | Load Loss | 0.8% – 1% of rated power | Optimized for minimal energy loss during load conditions |
| 22 | Impedance Voltage | 4.5% – 7.5% (depending on rating) | Standard impedance to ensure efficient energy transfer and voltage regulation |
| 23 | Short-Circuit Withstand Capacity | 30 – 60 kA (depending on the MVA rating) | High capacity to handle short-circuit situations without compromising transformer integrity |
| 24 | Insulation Class | Class A (up to 105°C) | Suitable for long-term operation under high thermal conditions |
| 25 | Winding Type | Copper or Aluminum | Copper windings offer higher conductivity, while aluminum is cost-effective |
| 26 | Tap Changer Type | On-load tap changer (OLTC) or off-load tap changer | Flexibility in voltage regulation and stability |
| 27 | Bushing Type | Porcelain or composite | Weather-resistant and durable to withstand harsh outdoor environments |
| 28 | Cooling Oil Volume | 800 – 5000 liters (depending on transformer size) | Sufficient oil volume for optimal cooling and performance |
| 29 | Design Life | 30 – 40 years | Engineered for long-term, reliable operation in challenging environments |
| 30 | Noise Level | 60 – 70 dB | Low noise operation for installation in residential or industrial areas |
| 31 | Warranty | 1 – 3 years (depending on agreement) | Flexible warranty options tailored to customer requirements |
| 32 | Shipping & Delivery Time | 60 – 90 days depending on location and customizations | Timely delivery for fast project implementation across regions |
| 33 | Lead Time for Custom Orders | 120 – 150 days (for large-scale customizations) | Custom transformer solutions delivered on schedule |
| 34 | Price Range | Contact for a detailed quote | Price depends on the MVA rating, custom specifications, and shipping location |
110 kV Power Transformer Structure Diagram and Manufacturing Factory
110 kV Oil-Immersed Transformer – Frequently Asked Questions (FAQ)
The cost typically ranges from $100,000 to $500,000, depending on capacity, cooling type, and customization. At Energy Transformer, we offer factory-direct pricing for customers in the USA, Canada, Brazil, Argentina, and Mexico, delivering high value without compromising quality.
The final price is influenced by the MVA rating, cooling system (ONAN/ONAF), insulation level, and custom features. Whether you’re in Chile, Colombia, or the U.S., Energy Transformer provides tailored quotes that match your technical and budgetary needs.
Rated current depends on transformer capacity. For example, a 20 MVA transformer at 110 kV has a rated current of approximately 105 A. Our products comply with IEEE, ANSI, and IEC standards for use in Peru, Ecuador, and North America.
A 40 MVA transformer at 110 kV operates at around 210 A under full load. Energy Transformer designs each unit to ensure reliable performance during continuous full-load operation, even in industrial environments in Brazil or utility stations in Canada.
Oil capacity generally ranges from 8,000 to 15,000 liters, depending on the design. We use high-grade mineral oil and eco-friendly alternatives in transformers supplied to Argentina, Paraguay, and Uruguay, ensuring optimal dielectric strength and longevity.
Dimensions vary but average about 4.5 meters in height, 4 meters in length, and 3 meters in width. Energy Transformer ensures compact designs suitable for remote sites in Bolivia or urban areas in Mexico, supporting smooth transportation and installation.
Weight depends on size and configuration, generally falling between 25 to 50 metric tons. Our units are engineered for ease of transport, with successful deliveries across the U.S., Chile, Venezuela, and more.
Nameplates list key specs: rated voltage, frequency, vector group, oil volume, and certifications such as UL (USA), CSA (Canada), and CE (Latin America/Europe). This ensures each unit meets local regulations in your country.
These transformers power utility grids, renewable energy projects, and industrial operations across Brazil, Mexico, Canada, and Colombia. From hydropower stations in Peru to solar farms in the U.S., Energy Transformer delivers long-lasting, high-efficiency solutions.
Absolutely. We offer full customization — including cooling method, bushing configuration, vector group, corrosion protection, and seismic design — for installations from urban Canada to high-altitude sites in Ecuador.
Energy Transformer is a leading Chinese manufacturer, delivering 110 kV units to the USA, Canada, Brazil, Argentina, Chile, and more. With UL, CSA, and CE certifications, we ensure compliance, fast 60–90 day delivery, and full engineering support for your market.
Typical lead time is 60 to 90 days. Thanks to our streamlined logistics, we offer fast delivery to North and South American countries, including Canada, the U.S., Brazil, and Chile.
Yes. We build climate-adapted models — from cold-resistant units for Canada to heat-tolerant units for Mexico, Colombia, and Venezuela — using sealed tanks, UV-resistant paint, and custom insulation.
We provide UL certification for the U.S., CSA for Canada, and CE for Latin America (e.g., Argentina, Peru). All units comply with IEC, ANSI, and IEEE standards for international use.
Yes. We offer remote technical support, detailed manuals, and on-site service for major installations in Mexico, Chile, and Brazil. Our engineers are experienced in international deployment.
Why Choose 110 kV 10-300 MVA Three-Phase Oil-Immersed High Voltage Power Transformer?
Energy Transformer’s 110 kV 10-300 MVA Three-Phase Oil-Immersed High Voltage Power Transformer is engineered for efficient and reliable power transmission in industrial, commercial, and utility applications. With a wide range of power ratings, this transformer ensures stable voltage transformation from 110 kV to various lower voltages, providing a robust solution for heavy-duty power needs.
✅ High Power Capacity for Heavy-Duty Applications
With ratings from 10 MVA to 300 MVA, it’s perfect for large-scale industrial operations, power plants, and utility grids, ensuring reliable power supply at 110 kV.
✅ Oil-Immersed Design for Efficient Cooling
The oil-immersed design ensures superior heat dissipation, extending transformer life and enhancing performance in demanding environments.
✅ Robust Construction for Long Life
Built with high-quality materials and advanced technology, this transformer offers long-term durability, even in harsh conditions.
✅ Global Compliance and Certifications
Meets international standards, including IEC, ANSI, IEEE, UL, and CE, ensuring safe and efficient operation across North America, Europe, Asia, and beyond.
✅ Energy Efficiency and Reduced Operating Costs
Optimized design helps minimize energy losses, reducing long-term operational costs and environmental impact.
✅ Customizable for Various Applications
Tailor the transformer to meet specific needs with customizable voltage ratings, cooling types, and protection features.
✅ Fast Manufacturing and Global Shipping
Energy Transformer provides fast production and reliable shipping to North America, South America, Europe, and more.
✅ Factory Direct Pricing
By manufacturing in-house, we offer competitive pricing, ensuring excellent value without compromising on quality.
Whether for utility stations, renewable energy projects, or industrial plants, Energy Transformer’s 110 kV 10-300 MVA Three-Phase Oil Immersed High Voltage Power Transformer is the ideal solution for your high voltage power needs.
📩 Contact us today for a personalized quote or technical consultation to meet your project requirements!
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