Zhejiang Jiangshan Hengli Electrical Co., Ltd. is one of the leading manufacturers and suppliers of air cooled dry type transformer in China. If you're going to wholesale durable air cooled dry type transformer made in China, welcome to get pricelist from our factory. All customized products are with high quality and low price.
Zhejiang Hengli Electrical manufactures Air Cooled Dry Type Transformers for medium- and low-voltage power distribution where reliable heat dissipation, low maintenance and installation flexibility are important. Unlike oil-immersed transformers, the transformer relies on air to remove heat from the core and windings.
The cooling system can be designed as AN (Air Natural) for normal continuous operation or AF (Air Forced) with cooling fans when additional thermal capacity is required. AN/AF configurations are widely used in dry-type transformer designs and are specified according to the required operating rating.
Main Parameters
|
Parameter |
Typical Specification |
|
Rated Capacity |
50–5000kVA |
|
HV Voltage |
6 / 10 / 11 / 20 / 35kV or customized |
|
LV Voltage |
0.4 / 0.415 / 0.433 / 0.69kV or customized |
|
Frequency |
50 / 60 Hz |
|
Phase |
3 Phase |
|
Cooling |
AN / AF |
|
Insulation Class |
Class F / H |
|
Winding Material |
Copper or Aluminum |
|
Vector Group |
Dyn11 / Yyn0 or customized |
|
Tap Range |
±5% or customized |
|
Standard |
IEC 60076-11 / project requirements |
Final ratings, losses, impedance and insulation levels are confirmed according to the approved technical specification.
Construction
The transformer consists of a low-loss laminated silicon steel core, HV and LV windings, dry insulation system, support structure, terminals and air-cooling arrangement. Depending on the project, Zhejiang Hengli Electrical can supply cast-resin or other approved dry-type insulation configurations.
For AN cooling, heat is removed naturally through air circulation around the windings and core. For higher-load applications, AF cooling uses fans to increase airflow and improve heat dissipation. Proper ventilation and thermal design are essential when selecting an air-cooled transformer.
Key Features & Advantages
Efficient Air Cooling
AN operation provides simple, quiet and low-maintenance cooling, while AF operation can be introduced when the project requires additional cooling capacity.
No Oil-Related Maintenance
The dry-type design eliminates the need for transformer oil sampling, filtration and oil leakage management, making it practical for indoor electrical rooms.
Flexible Project Configuration
Voltage ratio, rated capacity, winding material, vector group, impedance, tap range, enclosure protection and monitoring devices can be configured according to the project specification.
Reliable Thermal Performance
The core, winding arrangement and ventilation path are engineered together rather than treating cooling fans as a separate accessory. This helps maintain stable winding temperature during continuous operation and load peaks.
Example Application:
For an industrial distribution system with variable daytime loading, an AN/AF transformer can operate with natural cooling during normal demand and activate fans during higher-load periods, helping the buyer balance capacity, energy use and equipment footprint.
Applications
Air Cooled Dry Type Transformers are suitable for:
- Industrial plants and manufacturing facilities
- Commercial buildings and high-rise projects
- Data centers and critical power rooms
- Hospitals, schools and public infrastructure
- Solar PV and renewable energy projects
- Metro, railway and transportation systems
- Indoor substations and distribution systems
Dry-type transformers are particularly suitable where oil containment or fire-load considerations make an oil-filled transformer less practical.
Why Choose a Chinese Transformer Manufacturer as Your Partner?
As a global core production base for transformers, China brings you multiple notable strengths:
- Mature supply chains for raw materials and components
- Cost-effective pricing versus suppliers from other markets
- Sophisticated production technologies and reliable product quality
Hengli Electrical, based in Jiangshan, Zhejiang, integrates the strengths of China's manufacturing with decades of experience in power transformer industry. We deliver tailored transformer solutions that meet diverse market requirements across the globe.
FAQ
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