| Main Specifications | |
| Type | VPI dry type |
| Phase | Three phase |
| Frequency | 50/ 60Hz |
| Rated Capacity | 250 to 25000kVA |
| Rated HV | 3kV to 13.8kV |
| Rated LV | 0.4kV to 10kV |
| Temperature Rise | 125K |
| Cooling Mode | AN / AF |
| Insulation Class | H |
| Winding Connection Code | Y/E/yn |
| Impendance | 6- 9% |
| Secondary Windings Available | 6, 9, 12, 15, 18, 21, 24, 27, 36 windings |
| Maximum temperature | +40℃ |
| Minimum temperature | -25℃ |
| Standard | IEC, AS, EN, IEEE/ANSI, GOST |
Multi pulse rectifier dry type transformer
VPI transformer with Excellent structure, small size and high reliability:
1. With electromagnetic and structural optimization design, small size and lower noise
2. Same mold windings, the special support structure for coil end surface, high strength mechanical, high ability to withstand short-circuit, safe and reliable
3. Maintenance-free fastening body structure, keep reliable in the long-distance transport and operation
4. Lead lays out neatly, reasonable and nice.
High-quality material and good performance:
1. Made of Class C Dupont insulation materials with big running temperature rise margin, strong overload capacity, high fire resistance, good thermal stability and long service life.
2. Adopted vacuum pressure impregnation Class C with UL insulating paint to ensure moisture proof, dust-proof, anti-contamination and low partial discharge.
3. With high-quality core made of silicon steel sheet and high-quality oxygen-free copper wire to reduce the effective operation loss and improve efficiency.
Factory Advantages:
Applications:
Multi pulse rectifier transformer, Multi-phase power supply for Variable Frequency Drives. Frequency Inverter. High Voltage Rectifier, and installed in Power Plant. Boiler Fan. Coal. Mining. Petroleum. Steelworks and Water-supply System etc.
Phase shift transformer, 36 pulse output for 13.8KV variable frequency converter systems.
24 pulse Dry type converter transformer for Drives systems
Routine test
Type test
Special test
Yes. The transformer is specifically designed for VFD and IGBT testing environments, with optimized impedance and reinforced insulation to handle harmonic-rich loads and fast switching characteristics.
IGBT converters generate high-frequency harmonics that increase copper and core losses. A properly designed dry-type transformer compensates for these effects through enhanced cooling design and thermal margin.
Under harmonic loads, temperature rise may increase by 5–15%. Therefore, thermal design margin is included to ensure safe operation under distorted waveforms.
For heavy harmonic environments, K-factor design or harmonic-resistant construction is recommended to reduce overheating risks.
Yes. The transformer is mechanically reinforced to withstand thermal cycling and electromagnetic forces caused by frequent energization and load variation.
Download
