225kVA Cast Coil Transformer - 12.47kV to 480V
Reliable, high-efficiency dry-type transformer built for North American projects. 225 kVA, three-phase, 12470Y/7200V to 480Y/277V, 60 Hz. Cast resin construction (no oil), Class F insulation, aluminum windings, forced-air fans, and weatherproof NEMA 3R steel enclosure — ideal for outdoor or indoor pad/floor installations.
Product Photos
Technical Specifications
| Transformer Type | Cast Resin Transformer (CRT) |
| Transformer Configuration | Dry Type, Ventilated |
| Phase | Three Phase |
| Capacity | 225 KVA |
| Vector Group | YNyn0 |
| Primary Voltage | 12470Y/7200V AC |
| Secondary Voltage | 480Y/277V AC |
| Frequency | 60 Hz |
| Temperature Rise | 80°C |
| Cooling | AN/AF |
| Insulation Class | Class F |
| Efficiency Standard(s) | DOE 2016, IEEE, ANSI |
| Winding Material | Aluminum |
| Ambient Temperature Rating | 40°C |
| Sound Level | 56 dBA |
| Enclosure Rating | NEMA 3R Weatherproof, UL50 |
| Efficiency % | 99.00% |
| No Load Loss (in watts) | ±700W |
| Full Load Loss (in watts) | ±2,900W |
Technical Drawings
Winley Electric's cast coil transformers are designed, built, and tested in accordance with the highest industry standards including NEMA, ANSI, DOE, AS60076, and IEEE as applicable.
Performance & Advantages
- Strong short-time overload capacity: Resin-encapsulated windings provide better resistance to short current surges than oil-filled units
- Temperature visibility: Winding temperature probes with digital display enable real-time monitoring
- Low maintenance: Requires only routine inspection and simple cleaning
- Low noise: Quiet operation, suitable for noise-sensitive locations
- Low fire risk: Self-extinguishing materials reduce fire hazards
- Environmentally friendly: Materials comply with modern environmental and safety standards
- Low installation cost: Compact design allows closer placement to loads, saving time and expense
- Moisture and contamination resistant: Suitable for outdoor or high-humidity environments
- High impact tolerance: Robust construction for demanding industrial conditions
- Vibration-capable: Select models operate reliably under heavy vibration
Production Process
