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69KV 5250kVA 3 Phase Power Transformer

The 69kV 5250kVA three-phase power transformer is engineered for medium to large-scale industrial and utility applications, delivering reliable and efficient power distribution. Designed to meet international standards, this transformer ensures optimal performance and longevity in demanding environments. It features a robust construction with copper windings and operates with a Dyn1 vector group configuration. The transformer employs ONAN (Oil Natural Air Natural) cooling, with a high-voltage tap range of ±2 x 2.5% to accommodate varying load conditions. Equipped with advanced monitoring instruments, including oil level and temperature indicators, pressure relief devices, and Buchholz relays, it ensures safe and efficient operation. The Buchholz relay detects gas accumulation and sudden oil surge, providing early fault detection. The pressure relief device safeguards the transformer by releasing excess pressure, while the oil level and temperature indicators monitor the transformer's condition. This transformer is suitable for various industrial and utility applications, offering enhanced operational reliability and efficiency.

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Product Accessories

Bushings: High and low voltage bushings for secure electrical connections.

Cooling Fans: Fans for enhanced cooling during peak load conditions.

Control Box: Integrated control system for monitoring and managing transformer operations.

Surge Arresters: Protective devices to prevent damage from voltage surges.

Temperature Indicators: Devices for monitoring oil and winding temperatures, ensuring safe operation.

Pressure Relief Device: Safety mechanism to release excess pressure and prevent transformer damage.
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Oil Drain Valve: Facilitates safe and efficient oil draining during maintenance.

Lifting Lugs: For safe handling and transportation of the transformer.

Nameplate: Provides essential transformer identification and technical information.

Grounding Connectors: Ensures proper grounding for safety and equipment protection.

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Product Specifications

Primary Voltage

69KV

Power Rating

5250 kVA

Secondary Voltage

4,160Y/2,400V

Frequency

60Hz

Vector Group

Dyn1

Winding Material

Copper

Load Loss

7.5 kW

No Load Loss

30 kW

Impedance

8.5% at 5,250 kVA

Standards Compliance

Conforms to IEC 60076 ANSI and IEEE specifications

Product Applications

Economy is more affordable

Supplying power to machinery and equipment in factories, ensuring uninterrupted operations.

Industrial Manufacturing Facilities
Providing stable power for chemical reactions and processes, maintaining safety and efficiency.

Chemical Processing Plants
Delivering reliable power to mining equipment and facilities, supporting continuous extraction activities.

Mining Operations
Facilitating the connection of renewable energy sources to the grid, promoting sustainable energy solutions.

Renewable Energy Integration

Product Advantages

Enhanced Efficiency

Optimized design reduces energy losses, leading to cost savings and improved operational efficiency.

Robust Construction

Built to withstand harsh environmental conditions, ensuring durability and long service life.

Flexible Cooling Options

ONAN and ONAF cooling methods allow for adaptability to varying load conditions and ambient temperatures.

WellDone Power Transformer Plan Drawing

FAQ

What range of transformer products do you offer and which standards do they meet?

We manufacture a diverse array of transformers including Oil-Immersed Distribution Transformers, Dry Type Transformers, Power Transformers, Three Phase Pad Mounted Transformers, Single Phase Pad Mounted Transformers, Substation Transformers, and Pole Mounted Transformers. Our technical team, with nearly 20 years of industry experience, ensures that our designs comply with international standards such as ANSI, IEEE, DOE, CSA, AS, AZS, GOST, IEC, and more. Additionally, many of our products have obtained UL, cUL, and CSA certifications, affirming their safety and performance in global markets.
How do you ensure the quality and reliability of your transformers?

Our transformers are produced under a rigorous quality management system covering every stage from material selection to final testing. Each product comes with a minimum 24-month warranty, ensuring long-term safety and reliability. This commitment to quality has earned the trust of global customers and leading industry players.
What are your production lead times, customization options, and global market reach?

For standard models, our production lead time is typically 10 to 25 days, and we offer flexible OEM/ODM services for customized projects. We also tailor packaging solutions to meet specific customer requirements. Our transformers are exported worldwide—including North America, Europe, South America, Australia, Asia, and Africa—with successful partnerships involving renowned companies. For more details or personalized support, please contact us via email or WhatsApp.