Dry Type Transformer
Vacuum Pressure Impregnated (VPI)
Unitrans Power LLP offers a complete range of Dry Type Vacuum Pressure Impregnated (VPI) Transformers, designed for high reliability, durability, and low maintenance in demanding indoor and outdoor applications.
Manufactured in compliance with IS, IEC, NEMA, ANSI, IEEE, and ISO standards, our VPI transformers are ideal for environments requiring high insulation performance, thermal stability, and mechanical strength – including data centers, industrial facilities, commercial complexes, and utility networks.The VPI process ensures primary and secondary windings are fully impregnated with epoxy varnish under vacuum and pressure, providing superior dielectric strength, enhanced insulation, and protection against moisture, dust, and environmental contamination.
This results in long-lasting, reliable performance, even under harsh operating conditions.
Technical Features
- Rating: Up to 5000 kVA
- Voltage: 480 V – 36 kV
- Frequency: 50 Hz or 60 Hz
- Cooling Class: ANAF or AN
- Temperature Rise: 60°C, 55/65°C
- Winding Material: Aluminium or Copper
- Standards: IS, IEC, NEMA, ANSI, IEEE, ISO
Design Highlights
- VPI-impregnated windings for superior insulation and moisture resistance
- Excellent thermal performance and mechanical strength
- High dielectric strength with minimal partial discharge
- Optional IP55 enclosures (NEMA 3R/4X) for dust and rain protection
- F and H class insulation for high-temperature tolerance (155°C – 180°C)
Quality Control
Unitrans Power LLP follows ISO 9001:2015 quality standards, with stringent inspections and advanced testing at every production stage. Our quality management ensures maximum reliability, safety, and performance for every VPI transformer we deliver.
Unitrans Power LLP delivers high-performance Dry Type VPI Transformers that combine safety, reliability, and efficiency, providing dependable power distribution for utilities, industries, and specialized applications worldwide.
Applications
Dry Type VPI Transformers are suitable for a wide range of applications:
| Industry | Traction | Service Sector | Marine | Renewable Energy |
| Automotive | Railway | Hospitals | Cruise Ships | Wind Parks |
| Mechanical | Tramway | Hotels | Multifunctional Ships | Solar Power Station |
| Chemical | – | Real Estates | LNG Carriers | Hydroelectric Power |
| Paper Mills | – | Schools, Banks | Offshore Drilling Rigs | – |
| Foundries (Steel Plants) | – | Shopping Centres | – | – |