630 kVA Oil Filled Transformer: Technical Data, Cooling Methods & Applications
Jan 22, 2026
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Stable and efficient power distribution is essential for industrial facilities and utility networks. The 630 kVA Oil Filled Transformer is a widely used medium-capacity distribution solution known for its strong load capability, excellent insulation performance, and long-term reliability.
As a professional manufacturer, GNEE supplies high-quality 630 kVA Oil Filled Transformer products designed to meet international standards and demanding operating conditions.
Who We Are – Manufacturer of 630 kVA Oil Filled Transformer
GNEE is a professional manufacturer and global supplier of oil filled transformers and power distribution equipment. With advanced production lines, strict quality control systems, and rich export experience, we provide reliable transformer solutions for industrial, commercial, and utility projects worldwide.
Our 630 kVA Oil Filled Transformer units are produced in compliance with IEC, ANSI, and GB standards. As a direct factory supplier, GNEE offers competitive pricing, stable quality, and flexible customization to meet diverse project requirements.
GNEE transformer manufacturing facility and assembly line
What Is a 630 kVA Oil Filled Transformer?
A 630 kVA Oil Filled Transformer is a medium-capacity distribution transformer that uses insulating oil for cooling and dielectric protection. The oil circulates naturally or forcibly to dissipate heat, ensuring stable performance under continuous and fluctuating loads.
Typical Technical Data of 630 kVA Oil Filled Transformer
- Rated Capacity: 630 kVA
- Phase: Three Phase
- Primary Voltage: 10kV / 11kV / 20kV / Customized
- Secondary Voltage: 0.4kV or customized
- Frequency: 50Hz / 60Hz
- Insulation Class: Class A
This technical configuration makes the transformer suitable for both industrial and utility applications.
Cooling Methods of 630 kVA Oil Filled Transformer
ONAN Cooling Method for 630 kVA Oil Filled Transformer
ONAN (Oil Natural Air Natural) is the most common cooling method. It relies on natural oil circulation and air convection, offering simple structure, low maintenance, and high reliability.
ONAF Cooling Method for 630 kVA Oil Filled Transformer
For higher load demands, ONAF (Oil Natural Air Forced) cooling can be applied. Fans enhance heat dissipation, allowing the 630 kVA Oil Filled Transformer to handle higher continuous loads.
These cooling options ensure flexible operation under different environmental and load conditions.
Cooling system and radiator fins of an oil filled transformer
Key Advantages of 630 kVA Oil Filled Transformer
High Load Capacity and Energy Efficiency
The 630 kVA Oil Filled Transformer features optimized core design and high-quality copper windings, reducing energy losses and improving overall efficiency.
Strong Insulation and Operational Safety
Transformer oil provides excellent insulation strength, protecting internal components and ensuring stable operation even in harsh environments.
Long Service Life and Low Maintenance
With sealed oil tanks and corrosion-resistant structures, the 630 kVA Oil Filled Transformer delivers long service life with minimal routine maintenance.
Applications of 630 kVA Oil Filled Transformer
The 630 kVA Oil Filled Transformer is widely used in:
- Industrial plants and manufacturing facilities
- Commercial complexes and data centers
- Utility substations and distribution networks
- Infrastructure and construction projects
Its medium capacity makes it ideal for areas requiring stable and continuous power supply.
630 kVA oil filled transformer installed in an industrial substation
Customization and Standards for 630 kVA Oil Filled Transformer
GNEE provides customized 630 kVA Oil Filled Transformer solutions, including:
- Customized voltage ratios and tap changers
- Special insulating oil for extreme climates
- Different enclosure and protection levels
All products comply with IEC 60076, ANSI C57, and relevant GB standards. Third-party inspection and test reports are available upon request.
Conclusion
The 630 kVA Oil Filled Transformer from GNEE is a dependable and efficient solution for medium-capacity power distribution, offering flexible cooling methods, strong load capability, and long service life.
As a trusted manufacturer, GNEE provides customized solutions backed by professional support.
Contact us today to receive a detailed quotation and expert guidance for your 630 kVA Oil Filled Transformer requirements.