Where are dry-type transformers primarily used?

A dry-type transformer is an “electricity-hungry converter” that doesn't rely on oil for cooling but instead uses air or fans to dissipate heat. Its core function is to step down high-voltage electricity to lower voltages—for example, converting 10kV grid power into 380V industrial power or 220V household power. It has neither an oil tank nor insulating oil, making it both safe and environmentally clean.

I. Core Features

Oil-free for better health: No insulating oil is used, eliminating the risk of oil leaks, fires, or explosions. Even when placed near flammable materials, there’s no need to worry—feel safe using it at home, in your residential community, or in shopping malls.

Cleaner and more environmentally friendly: It contains no volatile oil compounds and won't pollute soil or water sources, making it a popular choice in areas with stringent environmental standards.

Cooling relies on “blowing air”: either by relying on natural air circulation for heat dissipation (suitable for small-capacity devices) or by installing a small fan to actively blow air (suitable for large-capacity devices)—and the noise level during operation isn’t high either.

Not afraid of moisture and resistant to dirt: The enclosure is tightly sealed, providing protection against dust and humidity, allowing it to function normally even in enclosed or damp environments such as basements and hallways.

II. Primarily used in these locations

Residential Living: For distribution rooms in residential communities, office buildings, and apartment complexes—given their proximity to people—dry-type transformers are relatively better.

Commercial venues—shopping malls, supermarkets, hospitals, and schools—are densely populated areas with abundant flammable materials. An oil-free design can help reduce potential hazards.

Industrial scenarios: Factory workshops and electronics plants—especially manufacturing industries with high cleanliness requirements—will not have their production affected by oil contamination.

Special environments: subways, tunnels, and basements of high-rise buildings—spaces that are enclosed with generally poor ventilation conditions—make dry-type transformers more suitable.

III. Simple Differences Between Oil-Immersed Transformers

Oil-immersed transformers rely on oil for cooling; they’re inexpensive and can be made with very large capacities, but they pose a fire risk and are best suited for open outdoor spaces. Dry-type transformers, on the other hand, are slightly more expensive and have limited capacity, yet they’re safe and environmentally friendly—making them ideal for indoor environments or areas with high population density. Simply put, if your scenario involves “fear of fire and a desire for cleanliness,” choosing a dry-type transformer is definitely the right decision.