Dry-Type Transformers
Product Overview
Our cast resin dry-type transformers are the premier choice for indoor substations, urban skyscrapers, and environmentally sensitive projects. Because they contain no flammable oils or fluids, they eliminate fire hazards, require no containment dikes, and are virtually maintenance-free. Fully compliant with IEC 60076-11, these transformers are commonly installed in hospitals, schools, high-rise office towers, shopping malls, underground transit systems, and marine vessels.
Key Advantages
Fire Safety (Self-Extinguishing)
Encapsulated in high-grade epoxy cast resin, the windings will not ignite or feed a fire, releasing no toxic fumes.
Zero Environmental Risk
Without liquid coolant, there is no threat of oil leakage or soil and groundwater contamination.
Maintenance-Free Operation
Eliminates regular oil purification, dielectric testing, degassing, and gasket monitoring cycles.
Compact Installation footprint
A smaller space envelope allows direct placement inside utility rooms close to loads, lowering low-voltage cable costs.
Core Parameters
100 kVA - 15 MVA
Up to 36 kV
IEC 60076-11 / E2-C2-F1
Common Applications
- Hospitals, Medical Centers, & Educational Institutions
- High-rise Residential & Commercial Office Towers
- Subway Stations, Airports, & Railway Infrastructures
- Marine Ships, Offshore Oil Rigs, & Vessels
- Solar & Wind Power Substations in Eco-sensitive zones
Technical Specification Data
| Technical Parameter | Standard Range / Option |
|---|---|
| Power Ratings | 100 kVA to 15 MVA (custom ratings on request) |
| HV Voltage Level | 6 kV, 11 kV, 15 kV, 20 kV, 22 kV, 33 kV, 36 kV |
| LV Voltage Level | 400 V, 415 V, 420 V, 690 V (custom LV configurations supported) |
| Frequency | 50 Hz (60 Hz available on request) |
| Cooling Method | AN (Air Natural) / AF (Air Forced - increases output up to 40%) |
| Insulation Class | Class F (155°C temperature limit) / Class H (180°C temperature limit) |
| Enclosure Protection | IP00 (without enclosure), IP20, IP21, IP23, IP31, IP44 (indoor/outdoor sheets) |
| Partial Discharge | Guaranteed less than 10 pC at 1.3 Um (highly reliable core bonding) |
| Climatic & Fire Class | E2 (climatic), C2 (thermal shock resistance), F1 (fire performance) |
| Winding Type | HV vacuum cast resin coils / LV vacuum impregnated or cast coils |
Standard & Optional Accessories
Testing & Quality Assurance
Our cast resin dry-type transformers are verified through comprehensive routine tests according to IEC 60076-11. We guarantee partial discharge levels below 10 pC, verifying the zero presence of voids in the cast resin. Standard checks include: Winding Resistance, Voltage Ratio and Vector Group verification, Impedance Voltage & Load Loss, No-Load Loss and Current, Applied & Induced AC Overvoltage tests, and Partial Discharge measurement.
Compliance Standard
ISO 9001 & IEC 60076 Verified
Need a high-safety dry-type transformer?
Get in touch with our engineers. We provide compact, fire-safe cast resin solutions tailored to your building, marine, or industrial substation.