Project Location: Kazakhstan
Product: Transformer Finned Radiators
Transformer Rating: 16 MVA
Voltage: 35 kV
Cooling System: ONAN / ONAF
Application: Outdoor Power Substation
A power infrastructure project in Kazakhstan required a reliable cooling solution for a 35kV, 16MVA oil-immersed power transformer.
The transformer was designed for outdoor operation in Kazakhstan, where significant seasonal temperature variations, cold winters, hot summers, dry conditions and airborne dust can place additional demands on transformer cooling equipment.
The customer required a radiator system that could provide stable heat dissipation under changing ambient conditions while maintaining reliable oil tightness, mechanical strength, corrosion protection and accurate connection to the transformer tank.
Based on the transformer specifications and local environmental conditions, we provided a customized transformer finned radiator solution for the project.
Kazakhstan has a continental climate with significant seasonal temperature variations.
Outdoor electrical equipment may experience very cold winters, hot summers, strong winds and dry, dusty conditions. These factors need to be considered when designing cooling equipment for oil-immersed transformers.
One of the key environmental challenges in Kazakhstan is the large difference between winter and summer temperatures.
Transformer radiators need to remain mechanically stable and reliable during repeated temperature changes.
The radiator design therefore needs to consider:
In northern and central areas of Kazakhstan, winter temperatures can become very low.
Low temperatures can affect transformer oil viscosity and natural oil circulation.
For this reason, the radiator system needs to work together with the transformer’s overall cooling and oil circulation design to maintain stable thermal performance during cold-weather operation.
Although Kazakhstan is known for its cold winters, summer temperatures can also become high, particularly in inland and southern regions.
High ambient temperatures reduce the temperature difference between the radiator and surrounding air.
A sufficient heat-transfer area is therefore important for maintaining the required transformer temperature rise during high-load operation.
Dry and windy conditions can expose outdoor electrical equipment to dust and airborne particles.
Dust accumulation on radiator surfaces can affect airflow and increase maintenance requirements.
The radiator configuration should therefore provide suitable fin spacing for effective airflow and easier inspection and cleaning.
Some regions of Kazakhstan experience strong winds and harsh weather conditions.
The radiator assembly therefore requires sufficient mechanical strength and reliable mounting connections for long-term outdoor operation.
Although Kazakhstan has a relatively dry continental climate in many areas, outdoor equipment is still exposed to rain, snow, moisture, temperature changes and atmospheric pollutants.
The radiator therefore requires an appropriate surface-treatment and anti-corrosion coating system.
For industrial areas or locations with more aggressive environmental exposure, enhanced corrosion protection can be specified.
The customer had several requirements for the 35kV, 16MVA transformer radiator system.
The radiator needed to provide reliable heat dissipation during both hot summer operation and changing seasonal conditions.
The cooling system needed to remain compatible with transformer operation during cold-weather conditions.
The radiator configuration needed to maintain effective airflow while allowing practical inspection and cleaning.
The radiator had to withstand long-term outdoor exposure and changing weather conditions.
The radiator needed to match the transformer’s tank dimensions, flange positions and oil connections to minimize on-site modification.
The customer required consistent product quality and reliable delivery to coordinate with the transformer manufacturing and installation schedule.
Based on the customer’s requirements, we provided a customized finned radiator solution for a 35kV, 16MVA oil-immersed transformer.
The radiator system was designed to support ONAN/ONAF cooling, allowing the transformer cooling capacity to adapt to different operating loads.
Under normal operating conditions, transformer oil circulates naturally through the radiator.
Heat generated by the transformer is transferred to the oil, then from the oil to the radiator surface and finally to the surrounding air.
When transformer loading increases, forced-air cooling can be activated.
Fans increase airflow across the radiator surface, improving heat transfer and providing additional cooling capacity.
The ONAN/ONAF configuration provides greater flexibility for transformer operation under changing load and ambient conditions.
The radiator solution was developed according to the following project factors:
The radiator dimensions, fin configuration, header pipes and connection flanges can be customized according to the approved transformer drawings.
This helps ensure compatibility with the transformer tank and reduces installation adjustments at the project site.
| Item | Project Specification |
|---|---|
| Transformer Capacity | 16 MVA |
| Voltage | 35 kV |
| Transformer Type | Oil-Immersed Power Transformer |
| Cooling System | ONAN / ONAF |
| Application | Outdoor Substation |
| Radiator Type | Finned Transformer Radiator |
| Radiator Quantity | According to thermal calculation |
| Radiator Dimensions | Customized |
| Fin Configuration | Customized |
| Header Pipe | According to transformer drawing |
| Connection Flange | Customized |
| Surface Treatment | Outdoor Anti-Corrosion Coating |
| Leak Testing | According to project requirements |
| Installation | Outdoor |
| Destination | Kazakhstan |
For transformer radiators, quality directly affects the reliability of the transformer cooling system.
Our quality control focuses on the key performance requirements of the radiator.
Critical dimensions are checked against the approved technical drawings, including:
Accurate dimensions help reduce installation problems and modification work.
Reliable welding is essential because the radiator contains transformer oil-flow channels.
Welded joints are inspected to help ensure structural integrity and reduce the risk of oil leakage.
Radiator assemblies are tested according to the specified project requirements.
The testing focuses on:
Reliable leak resistance is essential for safe transformer operation.
An appropriate anti-corrosion coating system is applied for outdoor transformer applications.
The coating helps protect the radiator against:
For industrial or more aggressive environments, enhanced coating specifications can be provided.
For transformer manufacturers and EPC contractors, delivery reliability is an important part of project execution.
For the Kazakhstan project, radiator supply was coordinated with the customer’s transformer production and installation schedule.
Our supply capability includes:
Radiators are supplied according to approved drawings and technical specifications to maintain consistency between units.
Radiator dimensions, fin configuration, header pipes and connection interfaces can be customized.
Complete radiator units and related connection components can be supplied according to project requirements.
Radiators are securely protected during international transportation to reduce the risk of:
Products can be prepared for container shipment and international export according to the customer’s transportation requirements.
The Kazakhstan project demonstrates our ability to provide customized transformer cooling solutions for challenging continental climates.
The solution addresses the customer’s key requirements for:
Reliable Cooling
The finned radiator provides the required heat-transfer surface for the oil-immersed transformer.
Temperature Adaptability
The cooling system is designed with significant seasonal temperature variations in mind.
Outdoor Reliability
The radiator structure and coating system are suitable for long-term outdoor operation.
Accurate Installation
Customized dimensions and connection interfaces help ensure compatibility with the transformer tank.
Oil-Tight Performance
Controlled welding and leak testing help reduce the risk of transformer oil leakage.
Stable Supply
Coordinated production, inspection and export packaging support the customer’s project schedule.
OEM Customization
Radiators can be customized according to transformer drawings, technical specifications and project requirements.
For a 35kV, 16MVA oil-immersed transformer in Kazakhstan, the radiator cooling system needs to perform reliably under a wide range of environmental conditions.
Cold winters, hot summers, large seasonal temperature variations, dry conditions, dust and strong winds all create additional requirements for outdoor transformer cooling equipment.
Our customized transformer finned radiator solution combines:Discover our 35kV 16MVA transformer radiator solution for South Africa, featuring reliable cooling, corrosion protection, quality control and stable supply
Reliable Cooling + Outdoor Durability + Corrosion Protection + Accurate Connections + Oil-Tight Performance + Stable Supply
By supplying transformer radiators according to customer drawings and technical requirements, we provide customized cooling solutions for transformer manufacturers, EPC contractors and power infrastructure projects in Kazakhstan.
Looking for transformer radiators for a 35kV, 16MVA transformer? Send us your transformer drawing and cooling requirements for a customized solution
