Restricted-Space Oil-Immersed Transformer Radiator Selection and Installation Compatibility
In the compact layout of oil-immersed transformers, radiators must not only meet thermal management requirements but also maintain appropriate installation clearances from high- and low-voltage bushings, valves and other accessories.TengQi Technology (TQT)The PC1900(1600)-19(4)/480 gooseneck-type detachable panel radiator features a staggered combination of 1900 mm long panels and 1600 mm short panels, connected through detachable flanges. It is designed for accessory clearance, on-site installation and maintenance requirements in space-constrained applications.
This model is primarily used for 10 kV, 35 kV and small- to medium-capacity 110 kV oil-immersed transformers. Final selection should be based on a comprehensive confirmation of transformer thermal load, oil circuit design, interface dimensions, installation orientation, accessory locations and project environmental conditions.
Why radiator structure matters in space-constrained projects
When conventional panel radiators are installed on transformer side walls, they may be affected by bushings, operating valves, oil level-related accessories or surrounding structures. If radiator panel lengths, connection locations and accessory layouts are not coordinated during the design stage, on-site installation interference, insufficient maintenance access or inconvenient removal and installation may occur.
Accessory clearance
The staggered arrangement of long and short panels reserves structural space for bushings, valves and densely arranged accessories, making it suitable for compact equipment layouts.
Maintenance accessibility
The detachable flange connection facilitates removal, installation, inspection, maintenance or replacement in accordance with on-site requirements. Specific operating procedures must be compatible with equipment interfaces and installation conditions.
Thermal design compatibility
Radiator surface area is one of the fundamental parameters in transformer thermal design and must still be calculated in combination with actual losses, oil circulation and operating conditions.
Structural adaptation logic of PC1900(1600)-19(4)/480
Gooseneck-type long and short panel combination
This model consists of19 long panels of 1900 mm and 4 short panels of 1600 mma combination with a panel width of 480 mm. The staggered profile created by the long and short radiator panels enables spatial coordination around transformer bushings, valves or other protruding accessories. This structure is not intended to replace overall layout design; instead, it provides a more targeted clearance solution for radiator installation within the available equipment space.
Detachable flange connection
The radiator is connected to the transformer via flanges, supporting on-site installation, inspection, maintenance and replacement arrangements. Flange dimensions, sealing method, connection orientation and associated accessory configuration should be clearly specified in approved drawings and the project technical agreement to avoid determining interfaces solely based on the model designation.
Continuous welding and outdoor protection design
The product adopts an integral continuous-welding design to reduce potential weak points in sealing. Its surface is coated in RAL 7032, with a specified total dry film thickness of 200 μm, and is configured in line with C5 corrosion protection requirements for the project. Welding quality, sealing performance, coating system and corrosion protection acceptance methods shall all be implemented in accordance with order technical documents and agreed inspection procedures.
Basic model parameters
| Parameter | Specification |
|---|---|
| Product Model | PC1900(1600)-19(4)/480 |
| structure type | Gooseneck-type long and short panel combination with detachable flange structure |
| center distance | Long panels: 1900 mm; short panels: 1600 mm |
| Panel configuration and panel width | 19 long panels + 4 short panels; panel width: 480 mm |
| Material and Thickness | SPCC; 1.0 mm |
| Self-cooling heat dissipation area | 22.44 m² |
| Product weight / oil-filled weight | 373 kg / 114.71 kg |
| Coating and corrosion protection | RAL 7032; total film thickness: 200 μm; C5 corrosion protection requirement |
| Minimum Order Quantity | 1 × 40HQ |
The above specifications are the basic parameters for the current model. Interface dimensions, flange configuration, coating system, inspection requirements, packaging and delivery method shall be subject to the project technical agreement and approved drawings.
Key selection and confirmation points for space-constrained radiators
Voltage class can help preliminarily identify the application range, but it cannot independently determine radiator suitability. For PC1900(1600)-19(4)/480, technical confirmation is recommended for the following items before procurement or manufacturing:
- Thermal load and required heat dissipation:Verify transformer capacity, no-load and load losses, ambient temperature, cooling method and operating conditions. The 22.44 m² value represents the natural-cooling radiator surface area of this model and does not represent the final cooling performance of a specific transformer under all operating conditions.
- Oil circuit and interface arrangement:Confirm oil inlet and outlet locations, flange interface dimensions, sealing requirements and oil circuit design to ensure a clear connection relationship between the radiator and transformer main body.
- Accessory clearance and installation orientation:Verify the locations of bushings, valves, instruments and surrounding equipment against the general arrangement drawing, and define the radiator installation orientation, lifting space and maintenance access.
- Environment and surface protection:For high-temperature, intense sunlight, sandy or dusty, coastal salt-spray or high-humidity environments, confirm the project-specific requirements for coating systems, corrosion protection grade, salt spray resistance and acceptance methods.
- Manufacturing and delivery conditions:Determine interface, coating, inspection, packaging and loading plans based on approved drawings. Actual quantities, delivery lead times and destination arrangements require further confirmation according to the order.
Applicable projects and environmental considerations
Typical equipment applications
- 10 kV and 35 kV oil-immersed distribution transformers;
- Small- and medium-capacity 110 kV oil-immersed power transformers;
- Urban distribution substations and projects with space-constrained layouts;
- Industrial and mining distribution transformers and rectifier transformers;
- Renewable energy box-type substations and step-up transformers;
- Special-purpose industrial oil-immersed transformers.
Key environmental assessment factors
- Inland areas with high temperatures, intense sunlight and heavy dust or sand exposure;
- Coastal areas with salt spray, high humidity and long-term outdoor operation;
- Projects involving transport vibration, on-site lifting or industrial impact factors;
- Engineering projects with defined coating protection and inspection standards.
Recommended project technical documentation
To improve the accuracy of radiator selection and installation compatibility for space-constrained transformers, it is recommended to provide the transformer general arrangement drawing, radiator interface dimensions, thermal requirements, oil circuit information, accessory locations, installation orientation, operating environment and applicable standards. TengQi Technology can support project coordination for drawing confirmation, sample development, volume manufacturing and quality verification. The specific scope of services shall be subject to technical and commercial documents confirmed by both parties.
For oil-immersed transformers with densely packed accessories or limited installation space, the selection and configuration of radiators must simultaneously address requirements for heat dissipation, interface connections, clearance, maintenance access, and environmental protection. Basing the design on confirmed drawings and the project’s technical agreement is a crucial prerequisite for developing a reliable installation plan.
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