PC3500-34/520 Special-shaped Radiator

Removable Transformer Radiator for Wind Power and Large Oil-Immersed Transformers

The PC3500-34/520 special-shaped radiator is a removable panel radiator developed by TengQi Technology (TQT) for high-capacity wind turbine step-up transformers and 220 kV-class oil-immersed power transformers. Featuring a 3500 mm center distance, 34 radiator panels and a 520 mm panel width, it provides a large heat-dissipation structure. Three square flanges enable sectional installation and removal, supporting lifting in restricted spaces, on-site assembly, outdoor corrosion protection and future maintenance.

In wind turbine nacelles, transformer enclosures and other space-constrained locations, one-piece large radiator components can increase access, lifting and connection complexity. The removable design supports sectional transport and on-site assembly.

Coastal salt spray, inland dust, high humidity, ultraviolet radiation and major day-to-night temperature variations continuously affect radiator surfaces. A suitable surface-protection system should be selected according to the project corrosion category.

For large oil-immersed transformers, radiator surface area, quantity and connection arrangement must be determined based on losses, oil temperature limits, ambient temperature, load conditions and cooling method.

Remote sites often impose higher requirements on maintenance planning, spare-parts logistics and field operations. The independently removable structure helps define maintenance plans based on actual site conditions and reduces the complexity of handling large assemblies.

Three-Flange Removable Structure

The radiator is equipped with three square flanges for independent installation and removal according to site requirements, providing a structural basis for sectional lifting, access through confined areas, field connection and future maintenance.

• Suitable for space-constrained nacelles or transformer enclosures
• Specific interfaces and removal procedures are confirmed by project technical documents

Galvanized and Painted Composite Corrosion Protection

The product combines galvanized base material with an external paint coating to create a two-layer corrosion-protection system. The total coating thickness is 125 μm, and product documentation indicates compliance with C3 corrosion protection requirements for enhanced outdoor durability.

• Designed for salt spray, high humidity, dust and temperature-variation environments
• Final suitability must be evaluated against the project environmental category and acceptance requirements

Continuous Welded Construction

The continuous welded structure helps reduce potential oil-leakage weak points and supports sealing performance in oil-immersed transformer cooling systems while meeting the rigidity requirements of large radiators.

• Focus on oil-circuit connections and sealing reliability
• Mechanical strength is subject to project technical requirements and inspection results

Large Center Distance and Heat-Dissipation Area

A 3500 mm center distance combined with 34 panels and a 520 mm panel width provides 61.81 m² of natural cooling surface area, offering an available specification for cooling-system design of high-capacity oil-immersed transformers.

• Suitable for selection in large transformer cooling systems
• Actual radiator quantity must be calculated based on thermal parameters

Confirm transformer rating, losses, cooling method, oil temperature requirements and operating environment.

Verify flange interfaces, installation orientation, spatial boundaries and field installation or removal conditions.

Confirm the configuration based on environmental corrosion category, coating requirements and lifting method.

Organize manufacturing according to approved documents and perform quality verification as agreed for the project.

Confirm packaging and delivery arrangements based on product dimensions, project location and transportation conditions.

Target Customers and Selection Inputs

This product is designed for B2B customers with clearly defined transformer cooling requirements and project technical boundaries. Complete input data helps determine whether the available specification is suitable and confirms radiator quantity, connection method, surface treatment and installation arrangements.

Primary Customer Groups

• Wind power step-up transformer manufacturers
• Oil-immersed power transformer and 220 kV-class main transformer manufacturers
• Wind farm operators and power project EPC contractors
• Power equipment buyers and project integrators

Recommended Technical Information

• Transformer rating, losses, load conditions and cooling method
• Interface dimensions, installation space and radiator arrangement requirements
• Design ambient temperature, corrosion category and coating acceptance requirements
• Transport route, lifting conditions, field installation and maintenance constraints