Oil Regeneration Rigs (CMM-R)
Transformer oil regeneration
The condition of paper insulation and the magnetic circuits of a transformer is what determines the length of its service life. There is no meaningful limit to the service life of the magnetic elements, but paper insulation is prone to stress and wear over time; making its condition the most important factor of transformer long term service. Normally, paper insulation ages over a long period of time, but the process can be significantly accelerated by heat, oxygen, water and the products of transformer oil oxidation. These products accumulate in the paper over time.
CMM-R Oil Regeneration Systems 
The GlobeCore regeneration process restores used oils to new like condition. This process makes it possible to fill transformers with oil that would previously have required disposal. The oil in the transformer can be used without replacement for the entire service life of the transformer.
The GlobeCore CMM-R systems are designed to extend transformer service life by restoring the dielectric strength and chemical composition of dielectric insulating oil.
In the process of oil regeneration, oil degradation products and acidic compounds are removed, the oil becomes clear, oxidation resistance is improved, Earth is free from oil and contaminants.
|
Technical specifications |
|
|
Parameter |
Value |
| Maximum flow rate l/h |
4000 |
| Nominal flow rate, max l/h |
1000 |
| Max. power consumption, kW |
69 |
| Sorbent total amount, kg |
1600 |
| Power supply parameters |
3ph 480V 60Hz |
| Theoretical amount of sorbent reactivations |
300 |
| Dimensions, not more mm | |
| – Length |
5150 |
| – Width |
2090 |
| – Height |
2102 |
while gas solubility is reduced.
Table below shows typical oil parameters before and after treatment.
|
Parameter |
Test Methods |
Before regeneration |
After regeneration |
|
Appearance |
Visual |
Cloudy brown |
Clear and transparent |
| Acid number, mg КОН/g |
IEC 296; ASTM D-664 |
0.63 |
0.01 |
| Corroding sulfur |
ISO 5662; ASTM D-1275 |
Gained |
None |
| Mass moisture content, ppm |
IEC 733; ASTM D-1533 |
170 |
5 |
| Breakdown voltage, kV |
IEC 156; ASTM D-1816 |
11 |
73 |
| Dielectric loss tangent for 90ºС |
IEC 247; ASTM D-924 |
4.0 |
0.001 |
| Bulk gas content, % |
IEC 60599; ASTM D-3612 |
12 |
0.1 |
| Surface stretching, Н/m, for 25ºС |
ISO 6295; ASTM D-2285 |
22 |
45 |
| Mechanical contaminants size, micron |
50 |
5 |
|
| Oxidizing steadiness:Acid number, mg КОН/g |
IEC 1125А; IEC 1125B; IP-307 |
— |
0.2
|
PLANT APPLICATION
GlobeCore’s Oil Regeneration Plants are design to carry out regeneration on energized and de-energized transformers as well as on tank to tank basis. This system is ideal for waste oil disposal.
Regeneration of Oil in transformer
Oil shall be taken and tested at the beginning of oil regeneration inside a transformer. The results will show duration (number of passes) required to regenerate the oil. Dissolved gas results will indicate whether transformer may be treated in energized or de-energized state. Usually Regeneration Plant is used on 50 % to 80% of its production capacity while treating energized transformers to ensure laminar movement inside of transformer oil tank. With average oil characteristics it takes 8 to 10 passes to regenerate oil to “like new” conditions. While treating de-energized transformers the Plant can be used on 100% of its production capacity.
Desludging
Desludging of transformers requires oil temperature to be above aniline point usually around 80 C. Constant circulation of oil shall be maintained during desludging and oil must be new or regenerated. This process will be more efficient on energized transformer as winding vibration and generated heat will also help to remove sludge. With average oil parameters it takes 10-20 passes to desludge energized transformer and up to 50 passes on de-energized transformer.
Tank to tank Regeneration
After a time period when oil is left in a storage tank to settle out suspended solids and free water regeneration is carried out on 20-25% of the Plant’s production capacity to regenerate the oil to “like new” conditions in 1 pass.
Available Models
| Model | Degassing Unit | Regeneration Unit | ||
| Model | Capacitylitres/hour | Model | Fuller’s earth amount, kg | |
| СММ-2R/600 | CMM-0,6 | 600 | СММ-2R | 300 |
| СММ-6R/1000 | CMM-1 | 1000 | СММ-6R | 800 |
| СММ-6R/3000 | CMM-3 | 3000 | СММ-6R | 800 |
| СММ-12R/4000 | CMM-4 | 4000 | СММ-12R | 1600 |
| СММ-12R/6000 | CMM-6 | 6000 | СММ-12R | 1600 |
| СММ24R/10000 | CMM-10 | 10000 | СММ-24R | 3600 |
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