Globecore GmbH, a German company, manufactures oil purifier which extends power transformer service life by 20 years.
Globecore protects and saves millions of dollars of investments in power transformers. This is achieved by transformer oil purification, which can be performed on site, with the transformer energized. Old oil is reused. Transformer oil is used in power and instrument transformers, as well as oil-filled switchgear. The...
For Class III oils that are service aged, Fuller’s earth treatment will be required. Color number, Acid Neutralization Number and Interfacial Tension are good indicators of the condition of Class III oils. Fuller’s earth processing systems are available in a variety of configurations sized to the flow rate of the vacuum oil purifier. They can be incorporated into the purifier system itself or provided as a separate module to be...
Transformer oils have certain technical and chemical parameters. These parameters define the scope of the oil’s applications and use.
The “Dissipation Factor” is one of the most important indications of oil quality and is a measure of the oil’s dielectric strength. Aging causes oil to lose its performance capabilities and poses a threat to the safe operation of oil filled equipment. Dielectric strength testing is...
A great number of manufacturers and distributors of transformer oils operate in international and national markets.
Transformer insulating oil is a dielectric liquid that is intended for cooling and insulating electric power transformers and other high voltage equipment. Transformers remain an indispensible part of the electric power generation and transmission industry.
In scientific terms, transformer oil is a product of...
Transformer Oil Testing is a proven loss prevention technique which should be a part of any condition based predictive maintenance program. This early warning system can allow maintenance management to identify maintenance priorities, plan work assignment schedules, arrange for outside service, and order necessary parts and materials. GlobeCore uses test results to diagnose transformer problems.
The transformer’s fluid not only serves as a heat transfer medium, it also is part...
The conditions in which insulating oil is used in transformers, switches, and other high voltage equipment are rather demanding on the performance characteristics of the insulating oil. During the service life of the oil, it is heated by currents, contaminated by particles of solid insulation and chemical reactions with the internal surfaces of the equipment. Each of these separately and together significantly accelerate the aging...
In power transformers and in electric equipment in general, oil is used to insulate and to cool. The use of various types of oil for power systems is governed by internationally recognized standards. The purpose of the uniform standards is to keep electric power equipment and systems in good working condition. Of course, this depends on the performance characteristics and general condition of the transformer...
Transformer oil serves to insulate the energized parts and components of electric power transformers and also acts as a heat transfer medium. Additionally, it protects the solid insulation from damaging moisture. Besides transformers, insulting oil is used in switches, high voltage capacitors and power cables. In switches, the oil acts as an arc extinguisher preventing fires and possible explosions.
Preventive Maintenance to Avoid Corrective Maintenance
Reliable operation of hydraulic equipment, widely used in various industrial facilities, depends mostly on the quality and purity of the internal cooling and lubrication oil. Industrial machines normally operate under heavy loads and sometimes they operate under very difficult environmental conditions. Regular maintenance of industrial equipment therefore, can allow maintenance personnel to detect possible equipment...
During the process of manufacturing hydraulic oils, certain important production regulations are observed. Before the oil is shipped to the client, the oil’s quality and purity is guaranteed and it should meet or exceed international standards. When the oil is in transit from the manufacturer to the customer however, it is impossible to avoid some contamination of the oil. During storage and transit, the fluid can...
The cooling and purification of industrial hydraulic oil is a basic requirement in extending the service life of any hydraulic system. Efficient cooling and purification solutions increase the reliability and service life of hydraulic equipment systems. Efficient operation, along with timely prevent maintenance, will increase your long term profits. To protect your equipment and the components of your hydraulic systems, the GlobeCore company, which...
Oils and other operating liquids, used as lubricants and coolants in various industrial equipment, are prone to degrade under the influence of elevated temperatures, pressures or flow. The functionality of oils depends on viscosity, oxidation stability and purity, lubrication capabilities, corrosion and emulsification. The difference of hydraulic oils from other oils is the relatively higher viscosity of the oil for high pressure hydraulic actuators. High...
While operating expensive power equipment, such as compressors, turbines, hydraulic presses, heat exchangers and power transformers, unforeseen malfunctions will happen. In rare cases failures are caused by overvoltage of the grid or human mistake, since operation of power equipment is a safety issue. Equipment downtime, failures and malfunctions are most often caused by the problems of internal components or insulation. Oil of various kinds are used for servicing of...
Oil used in various industries are divided into various types and subtypes. Physical properties and chemical composition divide oil into classes and categories. Various industries require specific oil types.
There is a group of oils for the energy industry, which includes turbine, dielectric (transformer) and compressor oils. Specific requirements are applied to each of the categories.
Also, depending on oil type, moisture and gas content...
The lifecycle of hydraulic oil depends on several parameters which can extend or shorten the cycle. Some of these are viscosity, acidity and the amount of additives. Contaminating particles, free water, unfavorable operating conditions (temperature, loads and other conditions) all contribute to aging of oil.
Oxidation is further accelerated at temperatures exceeding 60C or in contact with some other materials. Presence of solid particles, especially...
Transformer oil aging results in degradation of its properties. The aging process is accelerated by influence of water, air or contaminants. Moisture and air cause the oil to oxidize, which lowers it’s dielectric strength, causes sludge deposits on transformer internal insulation and damages the insulation by the acidic products of oil decay.
Water may be present in transformer oil in various states: solved, emulsified or...
The correct use of oil guarantees the reliability of industrial equipment and the prevention of equipment failures. Transformer oil is a dielectric insulator and a coolant. It also serves as an arc extinguisher preventing shorts and internal fires.
Transformer oil parameters degrade over time as the oil ages. Oil oxidation is mostly caused by external elements such as water, air, acids and heat. Aging of...
Insulating oil, or, in other words, transformer oil, is a mineral based organic compound, which is usually used in transformers because of its chemical properties and dielectric strength. Since it is a cooling agent and insulating medium that protects your insulation paper, its functions are essential for proper transformer operation.
Your transformer oil purifier is no longer helping you with your used insulating oil? That’s no surprise. At some stage of your transformer life, around 15-20 years of transformer operation, oil purification is no longer effective. In this case you can replace the oil (which is a very common option) or use an insulating oil clarification system to regenerate it – which is a BETTER option.
Insulating oil clarification systems with Fullers Earth provide a regeneration process that offers the following benefits:
Removes sludge and oxidation byproducts
Lowers the acid number
Clarifies the oil
Restores interfacial tension
Improves dissipation factor
Equipment is easy to mount and operate
Compatible with other transformer oil purification equipment of any capacity
Extends useful life of insulating oil
Globecore insulating oil clarification systems are filled with Fullers Earth. This is naturally occurring sorbent clay that easily adsorbs impurities from the oil. Thanks to its crystalline structure it can absorb large amounts of acidity and 25% of water.
The main advantage of application of Fullers Earth in insulating oil clarification systems is its high porosity – up to 125 m²/gram, this feature provides high level of adsorption of contaminants from oil.
Globecore insulating oil clarification systems with Fullers Earth are designed to provide the best solution for your company. The main elements of the system are: two tanks filled with Fullers Earth, filter, pallet collar. Each tank is a metallic cylinder with a hatch in the bottom, the top is closed by a lid.
There is a push button at the top of the vessel which serves to provide required density for the bulk material. The vessels are held upright by fixing devices. The cylinders may be turned over if the Fuller’s earth needs to be replaced. In the upper part there is a valve that keeps the material condensed. Tanks are maintained in vertical position by restrainers.
Average oil appearance
Transformer oil before and after purification
Deemed by eye exploiting crossing light and room temperature for 100 mm thick oil
Turbid brown fluid
Transparent sedimentless fluid to lack weighed particles
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