The vacuum cold trap is designed for pulling vacuum and drying of solid insulation of power transformers with voltages 110-1150 kV during installation, service and repairs.
The vacuum cold trap can be used with transformers capable of withstanding 26 Pa pressure.
Application of the unit for transformers which cannot withstand 26 Pa pressure is possible after reinforcement of the tank authorized by the transformer manufacturer.
While drying solid insulation of power transformers with voltages from 500 to 1150 kV, the vacuumizing process from atmospheric pressure to 400 Pa may be accelerated by connecting a vacuum blower section to the unit.
|Rate of vapor-gas mix evacuation from transformer tank at residual pressure from atmospheric to 400 Pa, liters/second, min||
|Rate of vapor gas mix evacuation from transformer tank at residual pressure from 400 Pa to 26 Pa, liters/second, min||
|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
|Weight, kg/lbs, max||2100/4,641|