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220KV 63MVA 3 Phase Power Transformer

The 220KV 63MVA 3 Phase Power Transformer is engineered for demanding high-voltage transmission applications in harsh outdoor environments. This advanced unit features a three-winding conservator design and is built to IEC standards for reliability and performance. Its on-load tap changer (OLTC) provides 21 precise tap positions with ±1.25% increments, ensuring optimal voltage regulation over a wide range of operating conditions. Designed for stability under extreme climates—with high ambient temperatures up to 50°C and sub-zero conditions down to -5°C—this transformer combines robust core construction, high-quality copper windings, and a durable, coated tank to deliver long-term service even in corrosive and tropical environments. Its efficient ONAN/ONAF cooling system guarantees that the unit maintains safe operating temperatures while minimizing energy losses and ensuring consistent performance in critical power distribution networks.

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Product Accessories

On-Load Tap Changer Module: Integrated with a high-precision control system for seamless voltage adjustments.

Oil Level Indicator: A digital sensor assembly providing accurate real-time readings of oil levels in the conservator.

Temperature Monitoring System: Dual sensors for both winding and oil temperatures, complete with alarm contacts for proactive maintenance.

Buchholz Relay Assembly: Designed to detect gas accumulation and trigger timely protection measures.

Pressure Relief Valve Kit: Engineered to rapidly vent excess pressure and prevent system overloading.

Drain and Fill Valve Set: Facilitates straightforward oil sampling and maintenance without compromising seal integrity.

Air Filtration Unit with Humidity Sensor: Helps maintain oil quality by filtering particulates and moisture.

Lifting and Jacking Hardware: Robust lugs and pads for safe handling during installation and routine servicing.

Control & Measurement Panel: Houses essential control devices and meters, ensuring effective system monitoring.

External Identification Plate: Durable nameplates displaying key transformer specifications and compliance marks.

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Product Specifications

Rated Power

63 MVA

Primary Voltage

220 kV

Secondary Voltage

30/11 kV

Frequency

50/60Hz

Tap Changer

21-position OLTC with ±1.25% step adjustments

Cooling Method

ONAN/ONAF (Natural oil and forced air cooling)

Connection Type

YNyno d11

Transformer Type

3-phase, three-winding conservator design

Standards Compliance

Fully IEC compliant

Environmental Endurance

Designed for operation in extreme conditions (ambient up to +50°C and as low as -5°C, with robust protection against humidity and corrosive elements)

Product Applications

Economy is more affordable

Ideal for modernizing high-voltage substations, ensuring reliable voltage regulation in wide-area transmission networks operating under extreme weather conditions.

Transmission System Upgrades
Serves as the backbone for solar and wind farm interconnections, managing variable output and providing stable, grid-compatible power conversion.

Renewable Energy Integration
Tailored for heavy industries, this transformer supports critical manufacturing processes by delivering consistent power quality in environments with fluctuating loads and harsh external conditions.

Industrial Power Distribution
Perfect for reinforcing city power grids and energy storage systems, where precise voltage control and robust design contribute to uninterrupted service in densely populated areas.

Grid Stability and Urban Infrastructure

Product Advantages

Exceptional Durability

Built with high-grade materials and robust construction techniques, this transformer withstands extreme temperatures, corrosive conditions, and mechanical stresses for long service life.

Accurate Voltage Control

The integrated 21-position on-load tap changer provides precise, real-time voltage adjustments that ensure optimum grid performance and adaptability across diverse load conditions.

Advanced Thermal Management

With a dual cooling system (ONAN/ONAF) and strategically designed radiators, the transformer maintains efficient thermal regulation, reducing energy losses and safeguarding against overheating.

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.

220KV 3 Phase Power Transformer 63MVA 3 Phase Power Transformer 220KV 63MVA 3 Phase Power Transformer

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