Dry Type Transformers

We Specialize in Emergency Transformer Replacements

If you have an emergency power outage call 800-232-9002 to contact our Rapid Response Team

How We Build Our Medium Voltage Dry Type Transformers

The materials and construction methods used in a transformer determine how long and how reliably it performs. At ELSCO Transformers, we build our devices by hand using 100% copper windings and the highest-grade insulation materials available. These copper windings provide a high conductivity, a strong short-circuit resistance and great long-term durability under load.

The coils and windings are cooled through air circulation, which allows our transformers to maintain lower operating temperatures and quieter performance, even at full rated load.

Our solutions also feature:

• Primary and secondary windings: Primary windings use round copper wire formed into round coils. Secondary windings are made of sheet-wound copper, delivering a BIL rating similar to liquid-filled systems.
• Disc winding: We apply disc winding to devices rated 25 kV or higher, as well as select 5 kV and 15 kV designs, where its construction offers additional structural advantages.
• Mitered core construction: The mitered core design operates at lower flux densities than standard cores, improving efficiency and reducing transmission losses across the transformer’s service life.
• DuPont Nomex and SG200 fiberglass: Coil assemblies use DuPont Nomex insulation rated to 200° Celsius for thermal stability and flame resistance. We also use SG200 fiberglass solid insulation, which provides structural support for molds and barriers. Together, these materials minimize the risk of premature failure from short circuits and excessive heat.

Our technicians verify each production stage for uniform winding tightness and adequate cooling clearances. Each device passes through five testing checkpoints:

• After winding the low-voltage coil
• After winding the high-voltage coil
• After core stacking
• After welding the bus bars
• After the varnish curing process

Our transformers record approximately 0.3% power factor in testing, which is below the 1% industry benchmark.

Comprehensive Expert Transformer Services

ELSCO Transformers offers a full range of services, including:

• Custom bus work: We fabricate custom bus bars to align with your facility’s existing low-voltage gear and high-voltage cabling and ship them with your transformer for a plug-and-play installation.
• Custom-built transformers: When our standard inventory does not meet your specifications, we design and build to your unique kVA ratings and voltage configurations, and can accommodate specialized K-factor designs and custom core and coil assemblies.
• Transformer retrofits: We modify in-stock solutions to fit your existing space and electrical infrastructure, supporting end-of-life replacements, capacity upgrades and damage-related needs. Our plug-and-play retrofit design simplifies installation, keeping your total project costs low.
• Transformer repairs: Our team repairs and rebuilds medium voltage dry type transformers, with a 24-hour response time for arranging pickup.
• Emergency replacement services: The ELSCO Transformers Quick Response Team prioritizes urgent orders, enabling you to restore operations.

NEMA Enclosure Ratings and Installation Environments

ELSCO medium voltage dry type transformers are available in NEMA 1 and NEMA 2 enclosures for indoor use, covering the majority of standard commercial and industrial installations. For outdoor applications, NEMA 3R enclosures equipped with thermostats provide the weather protection these systems require. Because dry type transformers are sensitive to moisture and adverse environmental conditions, we recommend that you avoid outdoor installation. If you choose to use these solutions outdoors, install a special enclosure for added protection. Our engineering team can help identify the correct rating for your specific environment.

Dry Type Transformers for Diverse Applications

Medium voltage dry type transformers are suitable for operations that depend on consistent, uninterrupted power across demanding load conditions and extended production cycles. Our solutions serve commercial and industrial customers across a wide range of sectors, including:

• Continuous process manufacturers and automation operations
• Just-in-time industrial suppliers
• Manufacturing facilities
• Hospitals and medical centers
• Colleges and universities
• Correctional facilities
• Electrical utilities
• Electrical contractors
• Electrical supply houses

Why Source Dry Type Transformers From ELSCO Transformers

ELSCO Transformers engineers and manufactures transformers with a focus on quality and performance. We maintain 95% unit availability and provide 24/7 phone support to answer technical questions and provide installation advice.

Investing in our systems offers several benefits, including:

• Reduced fire risk: Our dry type transformers are suitable for chemical plants, petrochemical operations and other fire-sensitive environments.
• Minimized fluid leak risk: Since our dry type transformers are air-cooled rather than liquid-cooled, they minimize the risk of fluid-related environmental contamination at your facility.
• Longer service life: Built with high-quality materials and expert craftsmanship, our transformers often deliver more than 35 years of service, reducing maintenance needs, replacement frequency and the total cost of ownership.
• Increased reliability in adverse environments: Moisture-resistant coil and core construction supports consistent operation in environments prone to seismic activity.

Order a Quality Medium Voltage Dry Type Transformer

If you are looking for high-quality, U.S.-manufactured medium voltage dry type transformers, choose ELSCO Transformers. Call 800-232-9002 today, or request a quote online. You can also compare the transformer types we offer.