Redefining Tap-Changer Technology
Ensuring reliability • Efficiency • Maintenance-free performance
On-Load Tap-Changer V-VAC
Why V-VAC Matters
- Benefits of Vacuum Technology
- Technical Highlights
- Applications
- KEY ADVANTAGES
- Support & After Sales
Benefits of Vacuum Technology
No arcing in the tap-changer oil
No oil filtration system required
Reduced maintenance frequency vs conventional oil systems
Compact structure ideal for up to 60-70 MVA / 132 kV applications
Optimized dimensions for space-saving installation
Technical Highlights
Phases: 3
Max rated current: 400 A
Rated short time current: 4 kA / 3 s
Peak withstand current: 10 kA
Step voltage: 1,300 V
Max operating positions: 19 (with change-over selector)
Frequency: 50 / 60 Hz
V-VAC III 400 Y - Neutral point application
V-VAC III 400 D - Any winding point
Applications
Power transformers up to 70 MVA
132 kV grid systems (voltage levels vary by region)
Standard grid and industrial transformer applications
Key Advantages
Arc-free operation ensures clean and reliable DGA results.
The V-VAC OLTC remains maintenance-free for most of the transformer's service life.
Improves overall system reliability and maximizes transformer uptime.
Support & After Sales
Retrofit solutions for existing transformers
Spare parts and replacements available
Thorough in-house testing and validation
Dedicated technical support and after sales-service
Our Clients
