Cast Resin Technology
Indoor Safe Distribution
SOTEK’s Cast Resin Dry-Type transformers are designed to eliminate standard fluid leakage concerns. The high voltage and low voltage coils are wound on automated machinery and encapsulated in high-grade epoxy resin under vacuum.
This prevents air pockets, minimizing partial discharges (PD values less than 10 pC) and ensuring excellent mechanical resistance against thermal shock and short-circuit mechanical forces.
Equipped with thermal controllers connected to PT100 temperature sensors embedded in the wind phases, SOTEK dry units trigger automatic fans for increased transient load capabilities.
Technical Specifications
| Parameter | Specifications |
|---|---|
| Capacity Range | Up to 6.3 MVA (50 kVA – 6,300 kVA) |
| Voltage Class | Up to 40.5 kV |
| Insulation Class | Class F (155°C) / Class H (180°C) |
| Temperature Sensor | PT100 RTD sensors (3 phases + core) |
| Temperature Controller | T154 microprocessor display (Trip/Alarm/Fan triggers) |
| Enclosure Protection | IP00 (No enclosure) / IP20, IP21, IP23 (Metal cabinet) |
| Cooling Mode | AN (Natural Air) / AF (Forced Air fans) |
| Standard Compliance | IEC 60076-11, ANSI, TCVN compliant |
