Cast Resin Dry Type Transformers
Epoxy vacuum-cast resin transformers with F1 moisture class and C2 climate classification. Designed for environments where oil-free operation is critical — hospitals, data centers, marine, metro systems, and high-rise buildings.
Engineering Features
Zero Oil Design
Eliminates fire and environmental contamination risk — no oil containment needed.
Technical Data
| Parameter | Range / Value |
|---|---|
| Rated Power | 100 kVA – 25 MVA |
| Primary Voltage | 6.6 – 36 kV |
| Secondary Voltage | 230/400 V – 690 V |
| Frequency | 50 / 60 Hz |
| Impedance | 4% – 6% |
| Insulation Class | F (155°C) |
| Partial Discharge | < 10 pC at 1.6 × Un |
| Noise Level | ≤ 55 dB(A) |
| Overload (AF) | +40% with forced cooling |
| Enclosure | IP00 to IP54 |
Standard range parameters — custom specifications available on request.
Related glossary terms
IEEE C57.12
ANSI/IEEE distribution transformer standard
ANSI C57.12.00
General requirements liquid-immersed
DOE 2016
US Department of Energy efficiency rule
NEMA TR1
Sound level & loss tolerances
UL Listed
Underwriters Laboratories safety mark
IEEE C57.110
Harmonic-loaded transformer rating
Cast-resin dry-type transformers for US indoor and zero-oil environments — hyperscale data centers, healthcare, educational facilities and high-rise commercial. Up to 25 MVA at 35 kV, UL 1562 listed and tested to IEEE C57.12.01 / NEMA TR1. F1 fire class, K-rated for harmonic loading, with NEMA 1 / NEMA 3R / NEMA 4 enclosures available.
Where Cast Resin Dry Type Transformers Excel.
Northern Virginia & Phoenix Data Centers
Cast resin transformers for hyperscale Tier III/IV data-center halls in Northern Virginia, Dallas, Phoenix and Hillsboro.
US Hospitals & Healthcare
F1 fire-class dry-type transformers for major hospital systems and healthcare campuses across the United States.
Subway & Mass Transit
Cast resin transformers for NYC Subway, MBTA, WMATA and other US metro / mass-transit electrification projects.
US High-Rise & Commercial Towers
Zero-oil transformers for Class-A office towers, hotels and mixed-use developments in NYC, Chicago, Miami and LA.
Frequently Asked Questions
Related engineering tools
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Related Knowledge
FAQs, glossary terms and sizing steps mapped to this product.
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