Transformer Radiator Sizes 310mm / 480mm / 520mm | OEM Corrugated Radiator Manufacturer
OEM Transformer Cooling Radiators for Distribution & Power Transformers
Transformer radiators are essential cooling components for oil-immersed power transformers, responsible for dissipating heat generated during load operation and ensuring safe, stable, and long-term transformer performance.
As a professional transformer radiator manufacturer, we supply 310mm, 480mm, and 520mm corrugated radiators for distribution transformers, power transformers, substations, and EPC projects worldwide.
We provide OEM manufacturing, custom engineering, and factory direct supply for global transformer OEMs and utilities.
Why Transformer Radiator Size Matters?
The width of a transformer radiator directly affects:
- Cooling surface area
- Heat dissipation efficiency
- Transformer loading capacity
- Operational temperature rise
- Service life of insulation system
Different transformer capacities require different radiator sizes to ensure optimal thermal performance.
Transformer Radiator Size Comparison (310mm vs 480mm vs 520mm)
Technical Overview
| Model | Application Range | Cooling Capacity | Typical Transformer Size |
|---|
| 310mm Radiator | Small distribution transformers | Medium | 100 kVA – 800 kVA |
| 480mm Radiator | Standard distribution & power transformers | High | 500 kVA – 2500 kVA |
| 520mm Radiator | Large power transformers | Very High | 2500 kVA – 6300 kVA+ |
310mm Transformer Radiator | Compact Cooling Solution
The 310mm radiator is designed for small to medium distribution transformers where space-saving and cost efficiency are key.
Key Features:
- Compact structure
- Stable ONAN cooling
- Suitable for urban distribution systems
- Easy installation
Typical Applications:
- Residential power distribution
- Small industrial transformers
- Compact substations
👉 Suitable for cost-sensitive projects with moderate heat load.
480mm Transformer Radiator | Most Widely Used Model
The 480mm radiator is the most commonly used standard size in global transformer manufacturing.
Key Advantages:
- Balanced cooling efficiency
- Strong adaptability
- Cost-effective for OEM production
- Suitable for both ONAN & ONAF systems
Typical Applications:
- Utility distribution transformers
- Industrial substations
- Renewable energy projects
- EPC turnkey power systems
👉 This is the global mainstream radiator size for power transformers.
520mm Transformer Radiator | High-Capacity Cooling System
The 520mm radiator is designed for large power transformers requiring maximum heat dissipation.
Key Advantages:
- Maximum cooling surface area
- High thermal efficiency
- Suitable for high-load continuous operation
- Ideal for extreme environments
Typical Applications:
- 2500 kVA – 6300 kVA transformers
- National grid substations
- Large industrial plants
- Mining & heavy energy systems
- Wind & solar power stations
👉 Best choice for high-voltage and high-load transformer systems.
OEM Transformer Radiator Manufacturer (Factory Capability)
We provide full OEM and ODM manufacturing services:
Engineering Support:
- Thermal design optimization
- Transformer loss calculation support
- Radiator quantity recommendation
- Drawing-based manufacturing
Production Capability:
- Automatic corrugation forming lines
- Robotic welding system
- Precision flange assembly
- Batch traceability system
Material & Surface Treatment Options
High Strength Materials:
- Cold rolled steel plate
- Precision corrugated fin forming
Anti-Corrosion Protection:
- Hot Dip Galvanized (HDG)
- Powder coating
- Epoxy coating
- Marine-grade coating
Suitable for:
- Coastal humidity zones
- Desert high-temperature areas
- Industrial pollution environments
Quality Control System
Every radiator is tested before shipment:
- Air pressure leak test
- Hydraulic pressure test
- Welding inspection
- Coating thickness test
- Dimensional inspection
- Final QC inspection
✔ 100% leak-free guarantee
✔ IEC-based manufacturing standard
Manufacturing Process
- Raw steel inspection
- Cutting & forming
- Hydraulic corrugation pressing
- Robotic welding assembly
- Flange installation
- Pressure testing
- Surface coating
- Final inspection
- Export packaging
Applications of Transformer Radiators
- Power transmission substations
- Distribution transformer systems
- Renewable energy plants (solar/wind)
- Industrial power networks
- Mining power systems
- Railway traction systems
- EPC turnkey projects
How to Choose the Right Radiator Size?
Selection depends on:
- Transformer capacity (kVA/MVA)
- Total losses (no-load + load loss)
- Cooling method (ONAN / ONAF)
- Ambient temperature
- Installation space
👉 If unsure, our engineers can calculate the optimal radiator configuration for your transformer.
OEM & Customization Service
We support:
- Custom radiator height
- Custom fin quantity
- Flange customization
- HDG thickness upgrade
- OEM logo branding
- Export wooden packaging
Why Global Buyers Choose Us
Factory Direct Supply
No trading cost → better pricing
Engineering Support
We support transformer OEM design optimization
Fast Delivery
- Standard models: 15–20 days
- Custom models: depends on design confirmation
Global Export Experience
Supplied to:
- Middle East
- South America
- Africa
- Southeast Asia
- Europe
- Central Asia
Frequently Asked Questions
What is the difference between 310mm, 480mm and 520mm radiators?
They differ in cooling surface area and are used for different transformer capacities.
Can you manufacture OEM radiators?
Yes, we support full OEM production based on drawings and specifications.
What coating options are available?
HDG, powder coating, epoxy coating, and marine-grade protection.
What standards do you follow?
We manufacture according to IEC standards and customer specifications.
Get a Fast Quotation
Looking for a reliable Transformer Radiator Manufacturer?
We provide:
✔ OEM Manufacturing
✔ Factory Direct Pricing
✔ Engineering Support
✔ Fast Production
✔ Global Shipping
👉 Send us your transformer specifications (kVA, drawings, quantity) and get a professional quotation within 24 hours.
