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GlobeCore Opens a New Service Center in Costa-Rica

Dear friends! We are happy to announce that a new service center commenced operations in Costa-Rica in November 2017. This service center will assist our clients throughout the Latin America.

A stock of spare parts will be made available to the clients. It is also possible to visit the new service center to purify and regenerate samples of industrial oil using GlobeCore machines. To do so, contact the center as follows:

GC Electric S.A
San José, Costa Rica,
Contiguo a Plaza Villa Columbus
Att: José Mora
Tel: 506 83236784
Email: [email protected].

Addresses of other offices and service centers can be found in the CONTACTS page of our website.

ELECTRICAL TRANSFORMER REPAIR

ELECTRICAL TRANSFORMER ELECTRICAL TRANSFORMER

THE GLOBECORE PROCESS
TO MAINTAIN ELECTRICAL TRANSFORMER OIL IN GOOD CONDITION

Problem #1: Moisture in transformer oil

Nature of Problem: Transformer oil readily absorbs moisture from the air. This water decreases dielectric strength of the oil

GlobeCore Solution: CMM Oil Purification Plant is designed for thermo-vacuum drying, filtration and removal of solid impurities from dielectric insulating oils with a viscosity of no more than 70 cSt at 50°С.  The plant offers purification to class 9 from initial purity class 13 (contaminant content below 0.004%) in multiple passes of the product through the filter section. The Plant is available in different configurations and capacities.

CMM 0.5

Processing rate 0.5 – m3/hour

CMM-2.2

Capacity 2.2  m3/hour

CMM-4.0

Capacity 4 m3/hour

 power transformer repair unit electricl transformer repair unit power transformer repair plant
Perfect solution for small electrical transformers
Conventional 220 electrical outlet power capability
The unit is compact, protected with metal doors, can be trailer mounted for on  field use Perfectly fit for heating electrical transformer and other equipment that contains dielectric insulating oil with hot oil

Problem #2: Moisture in Solid Insulation

Nature of Problem: Insulating paper absorbs and retains moisture due to higher affinity of water to paper than to oil. Moisture in oil-paper insulation can cause electrical transformer failures because (1) it decreases dielectric strength, (2) it accelerates cellulose aging (depolymerization) and (3) it causes emission of gas bubbles at high temperatures.

GlobeCore Solution: Vacuum Cold Trap is connected to Electrical Transformer and vacuum pumps bring the pressure down to 26 Pa. Cooling of the evaporator in the low temperature trap to minus 70oC, causes pressure difference of water vapor above the surface of the solid insulation in the transformer tank and in the body of the cold trap. This difference is the driving force of water evacuation.

The unit is available in stock.

Vacuum Cold Trap

Processing rate is 27×3=81  Pa, liters/second, min

solid isulation maintenance machine
The vacuum cold trap is designed for pulling vacuum and drying of solid insulation of power transformers with voltages 110-1150kV during installation, service and repair

Problem #3: Transformer Oil Oxidation

Nature of Problem: The reaction between unstable hydrocarbons in the oil, oxygen and other catalysts such as moisture, with additional factors such as heat, results in accumulation of decay products in the oil (oxidation by-products). Once oil oxidation starts, the oxidation products themselves act as catalysts to accelerate the oxidation reaction.

GlobeCore Solution: CMM-R and UVR units are designed for Complete Oil Restoration (of dielectric strength and chemical composition). The main operating principle of those units is percolation of oil through a stable sorbent layer. The CMM-R plant operates with Fuller’s earth and the UVR unit uses a special GlobeCore sorbent. All together, the systems remove acids, water and contaminants from insulating oil and insulating paper/windings of an electrical transformer. Those units are very Environmentally Friendly, as exhausted sorbent can be reactivated and used again in up to 300 cycles.

CMM-R2

Processing rate 100 – l/hour

CMM-R24

Capacity 6000  l/hour

UVR 450/16

Capacity 100-1000 l/hour

Transformer oil bleaching machine
The unique feature of the CMM-R unit is the capability to regenerate insulation oil directly in an electrical transformer ·                Energized transformer oil processing; and

·                Automatic Sorbent Reactivation

·                Trailer mounted

 

The unit successfully processes dielectric transformer oil, turbine oil, industrial oil, heavy fuel oil, and Diesel fuel

 

Problem #4: Dissolved gas and/or decay products

Nature of Problem: During its lifetime, the transformer generates decomposition gases, essentially from the organic insulation, under the influence of various stresses, both normal and abnormal, which could lead to failure if ignored.

GlobeCore Solution: The UVM unit is designed for degassing, drying, removal of solid particles and heating of transformer oil used in power transformers up to 1150V.
The unit can process mineral oils with the following properties:

Dynamic viscosity, mm2/sec, at 50 °С                    2…12;

Density at 20°С, kg/m3                                           800…950;

Moisture content, ppm, max                                    100;

Purity class ISO 4406, at least                                -/19/16

The UVM unit is available in different design configurations, Zeolite Filtration Section CP-260 is available as an option.

CMM-UVM 4/7

Processing rate 4 – m3/hour

CMM-UVM 10/15

Capacity 8 m3/hour

MCU ZEOLITE OIL DRYING UNIT

Capacity from 1.5 to 4.0 m3/hour

Transformer oil degassing unit Insulating oil degassing machine Zeolite drying system
The UVM unit is designed for:

·         Vacuumizing transformers;

·         Removal of solid particulate matter;

·         Removal of water;

·         Removal of gases

The unit is placed on a tandem axle trailer that is street legal and ready to be towed to any remote  location  This unit is designed to significantly reduce acid levels in used insulating oil

GlobeCore sets course for East Africa. Uganda Electricity Transmission Company Limited and GlobeCore – a new partnership

GlobeCore is a leading manufacturer of various equipment, such as transformer oil purification and regeneration plants, bitumen emulsion plants, bitumen modification plants, fuel blending systems and bio-diesel production system, employing over 200 staff on the production team. Our products are well known in the USA, Europe, Asia and Africa. While we are open to business anywhere in the world, we are also focusing on Africa.
GlobeCore is a lead manufacturer of variety equipments like Transformer Oil Purification and Regeneration Plants, Bitumen Emulsion Plants, Modified Bitumen Plants, Fuel Blending Systems and Bio Diesel Equipment. We are open to any country; now we are focus on African’s regions.
“GlobeCore’s representatives often travel to clients” – said mr.Sukhar, GlobeCore Export Manager – “we provide operators training and startup; separately we organize seminars to share our experience in oil purification and assets management”.
One such seminar was held in Kampala, the capital of Uganda last April. The focus of the seminar was the advantages of transformer oil regeneration by Fuller’s earth, and also on operational and environmental benefits of regenerating oil instead of replacing it.
Uganda and its neighboring countries are interested in electrical power development: within the next five years they will receive substantial investements from the World Bank to improve their national grids and make electricity accessible to population. At this time only 3 – 5% of Uganda’s population have access to electricity and there are many cities in the north of Uganda without electric power at all. Less than 2% of rural population has access to electricity, with less than half of that being provided by the national grid, other sources being household generators and solar panels.
As says Eugen Svirid, GlobeCore lead engineer, despite the growing importance of alternative energy, traditional power plants are the main providers of electricity around the world. These powers still need equipment replacements and modernizations.
Until Uganda receives the aid of almost 3.5 billion dollars over the next several years, which it needs for construction of Kawanda-Masaka transmission line and the related substation and 600MW power plant in Karuma, a lot can be done to preserve current assets – especially the most expensive of them, the power and distribution transformers.
Uganda Electricity Transmission Company Limited (UETCL) has teamed up with GlobeCore to upgrade their transformer oil purification plants. The company made its choice after a recommendation from Nigerian Power Holding Company, a partner of UETCL, which now operates eighteen GlobeCore mobile oil purification plants. UETCL fully understands the importance of transformer maintenance, says Christopher Mutyaba, the Head of Maintenance Department at UETCL. Accroding to him, transformer failures are, unfortunately, quite common, and cause frequent power outages. The population has to do without electrical power for six months, until a failed transformer can be repared or replaced. Mr. Mutyaba noted that transformer down time causes a significant loss revenue and growing customer dissatisfaction.
Latest GlobeCore technological developments will allow addressing the issue of excessive foam forming in the vacuum chamber which is often the case with old and contaminated oils. And as UETCL has many remote substation, oil purification plant will have fully automated control system with PLC and GSM module to minimize supervision.
German equipment is well known in Africa, especially in Uganda. Country operate transformer oil filtration machine purchased in 1991. While this equipment is still in fair condition, GlobeCore can replace most major components is required to satisfy higher demands for the quality of transformer oil, put on users by modern transformer manufacturers.

Regeneration of used oil

Used oil regeneration technologies

Over time, oil accumulates oxidation products, contaminants and impurities which drastically reduce its quality. Contaminated oil can no longer meet quality requirements and must be changed. Waste oil is collected and regenerated to retain valuable basic materials.

Oil cannot be recycled at petroleum processing plants with fossil oil, since additives contained in the oil disrupt oil processing machinery.

Depending on the actual regeneration process used, 2 or 3 basic oil fractions are produced; these can be mixed with additives to produce commercial oil (motor, transmission, hydraulic oils and plastic lubricants). Average yield of regenerated oil from waste oil containing 2 – 4% solids and water and up to 10% fuel, is 70 – 85% depending on the regeneration process used.

Regeneration of waste oil may involve various technologies, based on physical, chemical of combined physical and chemical processing. All of these processes are aimed to remove aging products and contaminants from the oil. The following sequence is normally used: mechanical removal of free water and solids from oil, evaporation or vacuum distillation and coagulation. If the above prove insufficient, chemical oil regeneration is used; those methods usually involve complex equipment and high costs.

Physical methods allow removal of solids particles, microscopic water droplets and some tar and coke material; evaporation removes some volatile impurities. Oil is processed by gravity, centrifugal force, and sometimes by electric or magnetic fields and vibration; other methods include filtration, water wash, and vacuum distillation. Physical methods also include various mass and heat exchange processes used to remove hydrocarbon oxidation products, water and volatile fractions.

Regenerated transformer oil by GlobeCore`s plants

Regenerated transformer oil by GlobeCore`s plants

Settling is the simplest method, based on natural gravity settling of particles and water. Depending on the degree of contamination and time allotted for purification, settling can either be used as a standalone method, or as preparation for filtration and centrifuge. The drawback of this method is the long time it takes and the large size of particles that can be removed (50 – 100 micron).

Filtration is a process to remove solid contaminants and tars by making the oil pass through mesh or porous filters. Common filtering media are metal and plastic meshes, felt, fabric, composite material and ceramics. Most facilities combine an increased number of strainers for basic filtration with the second stage of fine filtration.

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