Tag Archives: oil degassing

Oil Reclaiming and Oil Degassing Unit CMM-0.6 Launched in Italy

October 8, 2016Newsoil degassing, oil reclaiming, oil reclamation, transformer oil

October 2016: GlobeCore technical support team commissions an oil reclaiming and oil degassing unit CMM-0.6 in Italy.

The oil reclaiming equipment will be operated in Carpenedolo, Brescia. The CMM-0.6 is a portable oil station that purifies electrical insulating oils, removing mechanical impurities, water and gas. It guarantees the desired oils parameters for oils with viscosity less than 70 cSt (at 50°C).

The equipment is in demand among facilities dealing with installation, repair and operation of oil-filled high-voltage equipment (high-voltage switches, power transformers, etc.).

Depending on the type of oil reclaimation needed, the station operates in oil heating mode, or in thermal vacuum mode, filtering and cleaning the oil.

Specifications of the unit for oil reclaiming and oil degassing can be found here. Use the “Contact” tab to receive buying advice on the CMM-0.6.

The schedule of transformer oil maintenance oil type transformer maintenance

June 16, 2015Case Studies Of Oil Reclamationdielectric strength, equipment, GlobeCore, oil degassing, oil maintenance, oil reclaimer, oil reclamation, oil reclamation systems, power transformer, reclaim oil, regeneration, testing, transformer oil, transformer oil reclamation

oil type transformer maintenance

The frequency of transformers maintenance depends on the importance, design features and durability of transformers. The first step towards a preventive maintenance program is testing. Testing helps us to determine when a treatment is necessary.

WHY DO WE NEED TO CHECK TRANSFORMER OIL?

Transformer oil is an insulator between the metal parts of the transformer and the wiring within the tank. Over time, the oil can be contaminated with moisture or create combustible gases. By sampling and testing that oil, we can plan repairing or replacing the transformer before a failure occurs.

Maintenance Schedule for Oil Filled Power Transformers

Maintenance or Test	Recommended Interval	Reference
Transformer physical inspection	Annually
Leakage of oil and reading of MOG (Magnetic Oil Gage) of tanks	Daily	In case of unsatisfactory oil level in the MOG, oil to be filled in transformer and also the transformer tank to be checked for oil leakage. If oil leakage is found take required action to plug the leakage. If silica gel becomes pinkish, it should be replaced.
Dielectric strength test (BDV) and moisture content (PPM).	Annually	A dielectric strength is a measure of the voltage which is conducted by the transformer oil. At times it is the presence of contaminants which conduct electricity faster than the oil which in turn lowers the dielectric breakdown voltage
Neutralization test	Annually	This test which is carried out to ascertain the level of acid which is present in the oil. When oxidation occurs in the transformer oil, it leads to build-up of acid.
Dissolved Gas Analysis Test (DGA)	Annually for 132 KV transformer, once in 2 years for the transformer below 132 KV transformer and in 2 years interval for the transformer above 132 KV transformer.	It helps to analyze the gases which are present in the transformer oil.
Bushings– check of oil level	Weekly	If it is required, the oil to be filled in the bushing up to correct level. Oil filling to be done under shutdown condition.
Bushings –visual inspection	Annually
Bushings – visual inspection and cleaning	5 years
Interfacial tension test		This is a test which is carried out to detect the presence of polar compounds such as paint, varnish and paper.
Tan & delta test	One in two years	Finally the presence of water too is measured as water can decrease the dielectric breakdown voltage of the transformer oil
Colour test		This test indicates aging, quality and the presence of contaminants in the transformer oil.
Transformer excitation current test	5 years
Insulating oil – DGA, physical, and chemical tests	Anually
Top oil and winding thermometer Inspection	Anually
Oil level indicator operation	5 years
Sudden pressure relay	5 years

oil type transformer maintenance

So, for getting high performance and long functional life of the transformer, it is desired to perform various maintenance activities. GlobeCores’s oil reclamation equipment will keep your transformer oil in the best condition, providing with oil degassing, water and solids removal as well as acids reducing. It’s a fantastic transformer life!

Breaking news! Our engineers have just developed and constructed a new degassing plant, the CMM-6D, which has been successfully tested and put into production!

November 3, 2014Case Studies Of Oil Reclamation, Newsdirty oil, oil contamination, oil degassing, oil filtration, oil purification, oil reclamation, oil recovery, oil regeneration, oil rehabilitation, oil treatment, recycled oil

Breaking news!
Our engineers have just developed and constructed a new degassing plant, the CMM-6D, which has been successfully tested and put into production.

DEGASSING UNIT CMM-6D

Degassing unit CMM-6D has been designed to clean electrical and turbine oils by removing mechanical impurities as well as water and gases using a thermal vacuum purification process.

The main features of this degassing unit are:

1. Automatic Touch Pad Controls

2. Using only one oil pump
3. Operation is controlled automatically
4. Energy saving equipment: oil is heated according to pre-set performance standards
5. Vacuuming of many other types of equipment

The purifier operates in the following modes:
– «out vacuum mode»
– «heating filtration mode»
– «vacuum mode»
– «degassing mode»
– «manual mode»

Parameters:
1 Capacity, м3/hour
– degassing, drying and filtration mode 2-6
– heating and filtration mode 2-6
2* Properties of purified oil:
– volumetric gas content % 0.5
– volumetric water content, ppm,
– filtration fineness, microns 1
3.Size and mass, mm
– length 3700
– width 1750
– height 2320
4. Mass, kg 2600

Oil reclamation equipment will extend life of your transformers and safe your money

Oil Reclamation Systems

June 20, 2014Case Studies Of Oil Reclamationoil degassing, oil filtration, oil purification, oil reclamation, oil reclamation facility, oil regeneration, oil rehabilitation, oil treatment

The main purpose and benefit of transformer oil reclamation is to completely restore the insulating oil back to new like condition without having to buy new oil or dispose of old oil.

The GlobeCore Process of oil reclamation is performed by extracting water/moisture, acids, particulate matter and other undesirable contaminates such as unsaturated hydrocarbons, asphalt-resinous substances, sulfur and nitrogen compounds from the oil. The process of regenerating transformer oil uses various technologies based on (1) physical, (2) physico-chemical and (3) chemical processes.

There are several chemical methods of deep oil reclamation. The most common one consists of an acid-alkaline-earth method. This method of oil purification is based on treating the oil with sulfuric acid. The sulfuric acid acts to compact and bind all the unstable compounds into an acid sludge oil. Tar is then removed by “settling” and the remains of the sulfuric acid and organic acids are neutralized by the use of an alkali treating oil. Following that, the oil is washed with distilled water, dried and treated for complete neutralization with bleaching earth. After final filtration, the oil becomes completely regenerated.

Transformer Oil Reclamation Methods

Mechanical – To remove from the oil moisture/water and solid contaminants (filtration, centrifugal action, sludge removal);
Thermo-physical – evaporation, vacuum distillation;
Physico-chemical – coagulation, adsorption;
Chemical – if three methods are not enough, this method involves the usage of much more difficult and costly equipment.

Physical Methods of Reclamation of Transformer Oil

The physical method of transformer oil reclamation is usually referred to as purification by removing mechanical impurities and water, i.e. drying.

All Transformer oils, (whether new, old, or operational), that are contaminated by mechanical impurities and water, can be corrected in most cases by one of the following reclamation methods as long as there have been no changes in its chemical properties or other the significant changes that have altered the basic qualities of the oil. Undesirable contaminates that deteriorate the initial properties of the oil, can be dissolved in the oil or found in the oil in an undissolved state. Thanks to mechanical cleaning, these undesirable contaminates can be removed from the oil.

Oil Drying

The most advanced and cost effective method of oil drying is by spraying the oil under vacuum at a low temperature. The solution of the oil and water is sprayed through a nozzle that is placed in a tank of water in which “under-pressure” is created. Thus the free and dissolved moisture and the dissolved air are removed from oil. When the oil is “thin dispersed” it quickly gives up its moisture. Dry oil, as droplets, then fall to the bottom of the vacuum tank.

The efficiency and speed of drying rate is further increased by heating the oil. This increases the evaporation process of the water. Oil loss from evaporation is insignificant. The rate of water evaporation from oil will also depend on the difference between the pressure of saturated steam at a given temperature and the residual pressure in the vacuum tank.

Download catalog in pdf (eng)

Transformer Oil Drying– An Integrated Approach

April 17, 2014Case Studies Of Oil Reclamationoil degassing, oil drying, oil purificarion, oil reclamation, oil regeneration

Various international and local regulations contain instructions and specifications on oil quality. Additional regulations instruct where, when, and how oils can be used and how used oil can be disposed of legally. In order to comply with the myriad of regulations and to keep the environment protected from harmful emissions, and/or hazardous spills, a business may be required spend large sums of money. The timely replacement of transformer oil, environmental controls, preventive maintenance and corrective can impose even more costs.

One way to avoid, and possibly eliminate, some of these costs is to maintain your transformers in top working condition. This can be accomplished by paying close attention to the purity levels of your transformer insulating oil with an oil analysis program. The only way to maintain (or recover) the high dielectric strength of the transformer’s insulting oil is through the process of deep drying and degassing using modern purification and “Regeneration” technology.

Efficient oil drying and removal of solved gases requires vacuum treatment. Water and air are removed faster when the atmospheric pressure is lower and the temperature is higher (to a limit). The optimal vacuum process parameters are 80C/176F temperature and 133 Pa/0.01929 psi atmospheric pressure.

The best modern designs for oil drying and regeneration are more economical due to unification of many processes and a more versatile purification system all contained in one piece of equipment. Oil purification, drying, degassing and regeneration used to require several different types of processing equipment. GlobeCore engineers have developed the industry leading GlobeCore Process that has combined the purification and drying process in one machine that now fully regenerates all the oil in the transformer.

The CMM-R and CMM oil regeneration units manufactured by GlobeCore are designed for drying, degassing, removal of solids, nitrogenation and heating of transformer oil from power transformers and other electric equipment. In other words, they perform the complete oil regeneration process that combines purification of oil and the drying and cleaning of solid core insulation with one machine and one operator. It is a two for one process known as the GlobeCore “Two for One Engineering Miracle.”

The CMM-R units are equipped with electric heaters, oil and vacuum pumps, fine filters and adsorption sections. They are used for regeneration of oxidized transformer oil and can be connected directly to energized transformers.

A unique distinction of the modern regeneration units is that there is no atomization of oil or thin-film insets in the vacuum chamber, instead, “activator filters” are used, which allows the spreading of the oil for processing. The design allows for the elimination of bulky nozzles and sprayers and prevents ingress of oil into the vacuum line, greatly increasing the process consistency.

The UVR regeneration and oil reclamation system ensures a very high degree of efficiency of oil reclamation. The regenerated oils are consistent, resistant to oxidation and do not darken or accumulate odors. The complete purification, drying, degassing and regeneration units offer the full range of services for transformer oil maintenance and oil regeneration.

Its time to get with the Process, the GlobeCore Process!