UVV Vacuum cold trap
UVV vacuum cold trap unit is designed for evacuation and vacuum drying of solid insulation of 110-1150 kV power transformers in the process of their installation, servicing and repairs.
Owing to a special refrigerator the unit reaches -70°C. Such temperature causes the condensation of moisture from windings, what increases the level of drying efficiency.
| Parameter | Value |
| Rate of vapor-gas mix evacuation from transformer tank at residual pressure from atmospheric to 400 Pa, liters/second, min | 27×3=81 |
| Rate of vapor gas mix evacuation from transformer tank at residual pressure from 400 Pa to 26 Pa, liters/second, min | 500 |
| Residual pressure created by vacuum pump in transformer tank, max | 26 |
| Residual pressure in the unit during air leak test, Pa, max | 4 |
| Air leak in one hour, Pa, max | 100 |
| Water vapor condensation surface temperature, °С/ °F, max | -70/-94 |
| Residual moisture content in solid insulation, %, max | 1.0 |
| Cold generation capacity (at -70°С/-94F), W | 600 |
| Condensation surface area, m2, min | 6.1 |
| Defrosting system power consumption, kW | 2.1 |
| Nominal power, kW | 21 |
| Power supply voltage at 50Hz/ 60Hz, V (fully customizable on request) | 380 |
| Dimensions, mm/ft, max | |
| • length• width
• height |
1700/5’57’’
1600/5’25’’ 1950/6’4’’ |
| Weight, kg/lbs, max | 2100/4,641 |
- Improved noise suppression due to vane vacuum pumps;
- Three design types for operator convince;
- Full automation.