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5MVA 3 Phase Power Transformer

Our 5MVA 3 Phase Power Transformer is engineered for reliable, medium-scale power distribution across diverse networks. This oil-immersed transformer boasts a robust design that meets IEC standards, featuring an integrated on-load tap changer for precise voltage regulation. Built with a high-grade core and premium copper windings, it minimizes energy losses and ensures consistent performance over its expected lifecycle. The transformer’s efficient ONAN cooling system—optionally enhanced with forced-air cooling—ensures thermal stability even under fluctuating load conditions. Its compact, modular construction is ideal for both indoor substations and outdoor installations, capable of operating within a wide ambient temperature range. Comprehensive protection devices, including thermal, pressure, and overload safeguards, enhance operational safety in critical applications. With its versatile connection configuration and customizable voltage options, this transformer is perfectly suited for industrial complexes, commercial infrastructure, renewable energy systems, and utility networks requiring efficient, uninterrupted power delivery.

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Product Accessories

High Voltage Bushings: Sealed and insulated for secure, high-level connections.

Low Voltage Terminal Blocks: Engineered for reliable and safe secondary circuit integration.

On-Load Tap Changer Module: Provides precise digital voltage adjustments during operation.

Oil Level & Temperature Indicators: Integrated sensors for real-time monitoring and early warning signals.

Pressure Relief Valve Assembly: Safeguards against overpressure with built-in alarm contacts.

Auxiliary Cooling Radiators: Enhance the natural cooling process under high load.

Digital Control Panel: Offers comprehensive monitoring and control of transformer parameters.

Protective Grounding Kit: Includes high-quality clamps and cables to ensure safe operation.

Lifting & Installation Hardware: Custom-designed lugs and jacking pads facilitate secure handling.

Certification Nameplate & Documentation: Durable plate displaying technical data and compliance certifications.

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Product Specifications

Rated Power

5 MVA

Primary Voltage

Up to 33 kV (configurable for various distribution needs)

Secondary Voltage

Customizable (typically available at 11 kV or 6.6 kV)

Frequency

50/60Hz

Connection Configuration

YNd11

Cooling Method

ONAN with an optional ONAF enhancement for high-demand scenarios

On-Load Tap Changer

11-position tap changer with a voltage regulation range of approximately ±5%

Core Material

Constructed from high-grade cold-rolled, grain-oriented steel

Winding Material

High-conductivity copper with advanced insulation for optimal performance

Standards Compliance

Conforms to IEC 60076 and local utility industry standards

Product Applications

Economy is more affordable

Ideal for medium-sized manufacturing plants that require steady, high-quality power for production processes and critical machinery.

Industrial Distribution Networks
Perfect for office complexes, shopping centers, and multi-use developments where consistent voltage regulation minimizes downtime and improves efficiency.

Commercial Facilities
Suited for solar and wind microgrid projects; its precise voltage management supports efficient energy conversion and reliable grid interfacing.

Renewable Energy Integration
Designed for electrical utility providers looking to enhance local distribution networks with a flexible and durable transformer capable of meeting diverse load conditions.

Utility Network Upgrades

Product Advantages

Reliable Efficiency

Optimized design minimizes energy losses, ensuring high operational efficiency and lower running costs over the transformer’s service life.

Versatile Voltage Regulation

The integrated on-load tap changer offers adjustable voltage settings, making it adaptable to various grid requirements and dynamic load conditions.

Robust Construction & Safety

With premium materials, comprehensive protection features, and adherence to stringent IEC standards, this transformer delivers exceptional durability and operational security in critical applications.

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.