275kv Oil-immersed Power Main Transformer

Product overview
The 275kV three-phase oil-immersed power transformer is engineered to meet the soaring global demand for robust grid infrastructure. Widely deployed in national grids, regional substations, heavy industrial plants, and renewable energy generation sites (such as utility-scale solar/PV booster stations), this transformer delivers exceptional voltage step-up or step-down efficiency for stable, long-distance power transmission.
- Maximum Capacity: Up to 200MVA
- Voltage Class: 275kV (Highly customizable)
- Efficiency Rate: Peak efficiency exceeding 98%, strictly complying with global eco-design and energy-saving regulations.
- Design Lifespan: Built for over 30 years of low-maintenance, reliable operation.
- Fastest Delivery: Standard lead time is 90 days, with an accelerated rapid-delivery option of just 50 days for urgent grid projects.
Get Quotes Now！
 
Product advantages
Technical Standards & Global Certifications
To guarantee seamless integration into international power markets, our 275kV power transformers are engineered and tested according to global benchmarks:
- International Standards: Fully compliant with GB, IEC, GOST, EN, NF, and ANSI/IEEE. Custom engineering is available to match your local utility grid codes.
- Product Certifications: Certified by ISO, CE, IEC, SABS, COC, CSA, and UL, ensuring world-class safety, quality, and performance.

Key Product Advantages
- Proven Grid Stability: Validated by extensive operational data across complex working conditions, including harsh climates and fluctuating renewable energy loads.
- Eco-Friendly & Sustainable: Available with FR3 natural ester bio-degradable insulation oil and highly recyclable components. This drastically reduces the carbon footprint and aligns with international "Dual Carbon" and ESG initiatives. 
- Global Footprint: Trusted and running in over 50 countries and regions, bridging power gaps in high-demand markets across the United Kingdom,  South Africa, Malaysia, Indonesia, Australia and more
 
 
Why Choose hengfengyou Electric for Your 275kV Projects?
When investing in critical high-voltage infrastructure, choosing the right manufacturing partner is as vital as the equipment itself. Here is why global EPC contractors and utilities partner with hengfengyou Electric:

Tier-1 Engineering & Customized R&D
At hengfengyou Electric, we don't believe in one-size-fits-all. Our technical team tailors every 275kV transformer to your specific environmental constraints—whether it’s high altitude, extreme ambient temperatures, or highly corrosive industrial zones.
Unmatched Delivery Speed (Industry-Leading 50-Day Turnaround)
In an industry where lead times often span 6 to 12 months, hengfengyou Electric leverages an agile, fully integrated supply chain to deliver your 275kV main transformer in as little as 50 days, significantly cutting your project’s time-to-market.

Rigorous Quality Control & Zero-Defect Testing
Every unit undergoes exhaustive factory acceptance testing (FAT) in our state-of-the-art high-voltage laboratories. From impulse voltage tests to partial discharge detection, we ensure your transformer arrives ready for seamless commissioning.
 
Global Service & Lifecycle Support
From initial layout design and international logistics to on-site installation guidance and post-warranty maintenance, hengfengyou Electric provides 24/7 technical support, ensuring your substation operates at peak performance for decades.
 
Ordering instructions
- Main parameters of transformer (voltage, capacity, loss and other main parameters)
- Transformer operating environment (altitude, temperature, humidity, location, etc.)
- Other customization requirements (tap switch, color, oil pillow, etc.)
- The minimum order quantity is 1 sets
- Normal delivery period of 90 days, worldwide fast delivery