High vacuum transformer oil degassing Machine CMM-4A (capacity 4000 LPH)
High vacuum transformer oil degassing machine CMM-4A (capacity 4000 LPH)
The unit may be used for heating of oil-filled electrical equipment by hot transformer oil, vacuum transformer drainage and transformer dry-out. Unit is used for installation, repair and maintenance companies which are dealing with transformer oil treatment.The unit is not fit for operation in explosive or toxic environment, as well as environment reactive to lubrication materials. When operating the unit indoors, install gas exhaust line to evacuate gases into the atmosphere.
|Performance in a single pass through the purifier at a full flow rate shall be as follows: Water Removal: From 100 ppm down to less than 10 ppm as measured by ASTM method D-1533. Gas Removal:From fully saturated with air (10 to 12% by volume) down to less than 0.25% by volume as measured by the ASTM Method D-2945 Particulate Matter Removal: 98% of particles over 2 μm Dielectric Strength: Improvement in dielectric strength up to 70 kV.|
|1. Capacity, m3/h,|
|– in degassing, dehydration and filtration mode||
0 – 4.0
|– in heating and filtration mode||
up to 7.0
|2. Capacity adjustment range, m3/h||
|3.PedroGil RVB 20.20 Roots vacuum pump capacity, m3/h||
|4.* Processed oil parameters :|
|– maximum gas content, %, max.||
|– maximum moisture content, ppm,||
|– ISO 4406 industrial purity class||
|– mechanical impurities content, ppm, max||8|
|– filtration rating, micron||2…25|
|-breakdown voltage, kV, minimum||70|
|5. Maximum oil outlet temperature in heating mode , ºС||
|6. Filtration coefficient||
|7. Outlet pressure, MPa||
|8. Delivery head, m||
|9. Oil heater power, kW||
|10. Oil heater mean power, W/cm2, max||
|11. Maximum power consumption, kW, max.||
|12. Power supply parameters, 3 Phases + Neutral grounded||
|– voltage, V||
|– AC frequency, Hz||
|3. Dimensions w/o trailer, max., mm||
|14. Weight, kg, max.||
- gas content by volume less than 10,5%
- moisture content by weight less than 0,01% (100 ppm)
- temperature above 5 ºС.
The Unit (figure1.1) is an assembled container keeping all the junctions, components and aggregates. Container is the one- or biaxial trailer mounted. Front as well as back wall is lockable doors mounted for unobstructed access and fanning. Unit is supplied mounted on two-axial trailer equipped by torsional suspension axles, pneumatic wheels, coupling loop, support jacks, pneumohydraulic braking system, parking brake hand lever and electrical equipment.
There are the following components inside the frame: vacuum column 1, inlet oil pump 2, outlet oil pump 3, oil heater 5, fine filters 6, control panel (complete control unit CCU), vacuum pumps cluster, pipeline system with shut-off and control valves 4. To adjust parameters, Unit employs temperature controllers 2ТRМ «Оven» (equipped with ТСМ sensors), vacuum controllers RVE-4,1 (equipped with PМТ-6 lamps), both pressure and vacuum gauges(М1-М3). Vacuum pumps cluster (figure 1.2) is a frame mounted with one backing pump 7 and vacuum booster pump (Roots pump) 8. Vacuum pumps cluster joins vacuum column and oil trap as well as vacuum pipeline which is shut-off valve equipped.
transformer oil degassing machine general view
1 – vacuum column, 2 – oil heater, 3 – coarse (25 micron) and fine (2 micron) filters, 4 – complete control unit, 5 – inlet pump, 6 – outlet pump, 7 – vacuum backing pump, 8 – booster (Roots) pump, 9 – receiver (oil trap), 10 – pipelines.
Figure 2. Cartridge filter of transformer oil degassing machine
|Figure 3. Oil heater 1 – vessel; 2 – oil heating block cover; 3 – heating elements; 4 – oil outlet pipe branch; 5 – oil inlet pipe branch; 6 – drain valve; 7 – oil temperature sensors (thermocouples);|
|Figure 4. Vacuum column of of transformer oil degassing machine 1 – column; 2 – oil inlet pipe branch; 3 – vacuum system connecting pipe branch; 4 – oil outlet pipe branch; 5 – drain valve; 6 – activating filter (sprayer); 7 – sight glass; 8 – illumination.|
| Control cabinet is
designed for placement of electrical components to facilitate Unit
operation and equipped with electronic controller. It is a metal cabinet with lockable door. Electrical control
and commutation circuits are panel located inside. Control buttons and
light signalling devices are installed on the cabinet. For control
cabinet general view watch figure 5.1 – Power supply manual breaker;
2 – Mimic diagram;
3 – Temperature measuring regulators;
4 – Vacuum measuring unit;
5 – Master controller;
6 – Power indicating lamp «Power»
7 – Emergency «STOP» button
8 – Indicating lamp of correct phase connection «Phase control»
9 – Mode select switch «Mode»;
10 – Turn on button (for operation in a set mode) «Start».
11 – Turn off button (for operation in a set mode) «Stop».
12 – LEDs operation control button «Check».
13 – Manual control switch for vacuum pump «VP1/VP2»;
14 – Manual control switch for oil pumps «P1», «P2»;
15– Manual control switch of heating elements «Heating I», «Heating I I»,
«Heating I I I»;
16 – Valve manual control switch «V1»…«V6».
Figure 5. General view of control cabinet panel
Control and measurement instrumentsColumn’s residual pressure is controlled by electronic vacuum controller RVE-4.1. Limit of effective measuring range is 0,133÷105 Pa. When operated oil heater is controlled by following measuring gauges:
- thermostat – for oil heater switch off if oil temperature is above 90º C set;
- flow relay – for oil heater switch off if no oil flow is supplied through oil heater;
- thermistor – for oil temperature measuring on heater outlet;
- manometers – to indicate contamination level of filter elements with regard to inlet and outletpressure in fine filters;
- level indicators – to control oil level in vacuum column.
- oil pumping;
- oil heating and filtration;
- oil dehydration and degassing;
- vacuumizing of external equipment.