Dry-Type Transformer Applications, Specifications and Selection Guide

Dry-Type Transformer Applications, Specifications and Selection Guide

Dry-type transformers have established themselves as the preferred solution for indoor power distribution across a wide range of applications. Unlike their oil-immersed counterparts, dry-type transformers use air or solid insulation materials instead of flammable oil, making them inherently safer for occupied buildings and sensitive environments.

What Is a Dry-Type Transformer?

A dry-type transformer is a type of power transformer where the core and windings are insulated using air, varnish, epoxy resin, or other solid materials rather than transformer oil. This design eliminates the risk of oil leaks, fire hazards, and environmental contamination, allowing safe installation inside occupied buildings without special fire containment measures.

Key Advantages of Dry-Type Transformers

Fire safety: The most significant advantage. Without oil, there is no risk of flammable fluid igniting. This makes dry-type transformers suitable for buildings with strict fire safety requirements. Indoor installation: Can be installed in basements, rooftops, and interior spaces without oil containment systems. Low maintenance: No oil testing, filtering, or replacement required. Environmental safety: No hazardous oil fluids. Fully recyclable core and winding materials.

Classification

Class F (155C) and Class H (180C) insulation. Cast Resin Transformers and Varnished Dry-Type Transformers available.

Specifications

Rated power: 50kVA to 5000kVA. Primary voltage: 6kV to 33kV. Secondary voltage: 400V, 415V, 230V. Standards: IEC 60076-11, IEEE C57.12.51.

Applications

Commercial buildings, hospitals, schools, data centers, industrial facilities, transit systems, and renewable energy projects.

Why Choose Ceho Power?

Ceho Power manufactures dry-type transformers from 50kVA to 5000kVA. ISO 9001 certified. Global delivery. Contact us for a quote within 24 hours.