CMM-10.0 A (UVM) designed for vacuum evacuation of transformers, removal of solids, moisture and gas from electric insulation oils with viscosity below 70 cSt at 50С.

The unit is to be used for installation, repairs and operation of oil filled high voltage equipment (power transformer, high voltage switches etc).

Production capacity of CMM-10.0 A (UVM) is 10000 L/H in Thermo-Vacuum Mode and 15000 l/h in Heating and Filtration Mode. Allowing to process up to 360000 L of transformer oil per day and provide:

• Removal of Water from 100 ppm down to 10 ppm and from 50 ppm to 5 ppm in a single pass and down to 3 ppm after 3 passes (ASTM method D-1533).

• Reduction of Gas content from fully saturated with air (10 to 12% by volume) to less than 0.1% (ASTM D-2945) in a single pass.

• Removal of Particulate Matter to 5,0 microns

• Improvement in dielectric strength up to 70 kV.

Technical parameters

Parameter Value

Max processing rate, m3/hour

- degassing, drying and filtration mode 10

- heating and filtration mode 15

* Parameters of processed oil:

- max gas content, % volume 0,1

- max moisture content, ppm 5

- ISO 4406 industrial purity class 9

Max oil output temperature in heating mode, ºС 90

Output pressure, MPa 0,2

Max oil heater power, kW 174

Max power consumption, kW 205

Residual pressure in the vacuum chamber during degassing, max Pa 267

Residual pressure in the vacuum chamber during air tightness test, max Pa 26,7

Air leak into the vacuum system in 1 hour during air tightness test, max Pa 267

Electric power

- voltage, V 380

- AC frequency, Hz 50

Dimensions, mm

- length 2795

- height 1805

- width 1600

Max weight, kg 2400

* Note - initial oil parameters:

- gas volume content – below 10.5%;

- moisture content – below 0,01% (100 ppm);

- temperature – above 0 ºС.

Unit design

The unit is built on a frame with lockable doors and contains the following:

1. frame;

2. centrifugal oil supply pump;

3. centrifugal oil output pump;

4. vacuum booster pump;

5. backing pump;

6. electric control cabinet;

7. vacuum chamber;

8. oil heater;

9. filters;

10. oil trap;

11. piping;

12. control panel;

13. oil outlet;

14. oil inlet;