Dehler Dehler

China Dry Type Transformer Suppliers | Reliable Factory for Fireproof and Efficient Power Solutions

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Discover our high-quality dry-type transformers, expertly manufactured in China. These power transformers operate without insulating oil, utilizing air cooling—either natural or forced—for efficient heat dissipation. Ideal for high-rise buildings, commercial centers, and airports, our dry-type transformers excel in applications requiring enhanced fireproofing, explosion-proofing, and moisture protection. Compared to traditional oil-immersed transformers, our products offer superior fire resistance, reliable operation, convenient maintenance, and exceptional short-circuit withstand capability. As a leading supplier and factory in the industry, we are committed to delivering innovative and dependable transformer solutions to meet your needs.

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Product Description

Key Features

Oil-Free Design The core and windings are not immersed in insulating oil, eliminating risks of fire, explosion, and oil contamination. This allows direct installation near the load center.
Cooling Method Utilizes natural air cooling (AN) or forced air cooling (AF). AF mode significantly increases capacity for high-demand periods.
Eco-Friendly Contains no oil, making it sustainable and ideal for locations with strict environmental and safety requirements.
High Safety Standards Possesses excellent flame-retardant and self-extinguishing properties, combined with strong short-circuit resistance.
Low Maintenance Minimal upkeep required. Systems can be equipped with temperature monitoring and protection for enhanced reliability.

Environmental Conditions

Operating Temperature: -45°C to +40°C, with relative humidity <70%.

Altitude: Designed for operation at altitudes not exceeding 2500 meters.

Placement: Avoid exposure to rain, moisture, high heat, or direct sunlight. Ventilation openings must have a 40cm clearance.

Safety Hazards: Prevent operation in environments with corrosive liquids, gases, dust, conductive fibers, or metal shavings.

Interference: Avoid environments characterized by vibration or heavy electromagnetic interference.

Handling: Avoid long-term inverted storage and protect against strong impacts during transportation.

Typical Applications

Infrastructure: High-rise buildings, commercial centers, hospitals, airports, docks, and subways.

Industrial: Modern factory workshops and manufacturing plants.

Utility: Local lighting systems and power distribution centers.

Specialized Environments: Museums, tunnels, laboratories, and other fire-sensitive locations.

Product Display

Dry type transformer view 1
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Frequently Asked Questions

What is a dry type transformer and how does it differ from oil-filled units?
A dry type transformer uses air as the cooling medium instead of insulating oil. This eliminates fire and explosion risks, making it safer for hospitals, high-rise buildings, and underground facilities where oil-filled units are restricted.
What cooling methods are used for these transformers?
They support Natural Air cooling (AN) and Forced Air cooling (AF). AF mode utilizes fans to circulate air around the windings, which can significantly increase the transformer's rated capacity compared to standard AN mode.
What are the required installation environment conditions?
Ideal conditions include temperatures between -45°C and +40°C, humidity below 70%, and altitudes under 2500m. The unit must be kept away from direct sunlight, corrosive substances, and vibration, with at least 40cm clearance for ventilation.
How much maintenance is typically required?
Dry type transformers require very little maintenance because there is no oil to test or replace. Integrated temperature monitoring systems further simplify oversight and ensure long-term operational reliability.
Where are these transformers most commonly applied?
They are widely used in urban infrastructure (airports, subways, commercial centers), industrial workshops, and environmentally sensitive locations like museums or laboratories where fire safety and cleanliness are paramount.
Are dry type transformers safe during a short circuit?
Yes. They are designed with high-quality flame-retardant and self-extinguishing materials. Their robust construction provides excellent short-circuit resistance, making them a highly reliable choice for critical power distribution.

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