Tag Archives: transformer oil

Unidad CMM-12R comisionada en El Paso

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15 de Noviembre de 2015 los empleados de GlobeCore completaron su trabajo bajo el contrato de producción, suministro, comisionado y puesta en marcha de la nueva unidad de regeneración de aceite de CMM-12R en la ciudad El Paso, Texas, EE.UU.

Éste equipo está diseñado para la regeneración completa del aceite dieléctrico aislante en los transformadores modernos eléctricos de potencia. La característica principal de la unidad de regeneración CMM-12R está en que la unidad está apta procesar el aceite sin tener que vaciar y/o recargar los patrones de sorbente con Tierra Fuller, mientras el transformador está energizado.  La unidad puede reactivar Tierra Fuller automaticamente, eliminando de esa forma la necesidad de desenergizar el transformador para procesar el aceite.

transformer-oil-purification-samples-before ad after

Conectar el equipo al transformador no tomaría mucho tiempo y puede ser efectuado por solo una persona.  Una vez montado, el equipo ya está completamente automatizado.  La unidad puede estar operada de veinticuatro horas con un solo operador ubicado en el habitáculo de control con su calentamiento y aire acondicionado y equipado con la computadora. Adicionalmente, la unidad CMM-12R puede estar controlada por medio de las comunicaciónes móviles remotas a través del módulo específico de GSM.

el-paso

Al trabajar con los aceites aislantes con los inhibidores, la unidad opcional adicional puede injectar los inhibidores aditivos al aceite y así mejorará la resistencia del aceite a la contaminación y a la oxidación.

Los equipos de regeneración GlobeCore se caracterizan por su alta calidad y por la simpicidad en la operación.  Se realiza muy poca pérdida de aceite durante el proceso de regeneración y los cambios del peso se deben solamente a la retirada del agua y de la humedad.

Especificaciones técnicas de CMM-R12

Descripción del parámetro

Valor
1. Nivel de flujo recomendado m3/gals,

4/1059
2. Peso total del adsorbente en la unidad, kg/lbs, no menos

1600/3536
3 Cantidad de aceite regenerado con la acidez 0.15 mg KOH/g por un ciclo, litros/galones, no menos

6400/1690
4 Parámetros de aceite procesado:
Fineza de filtración, μm, no mas

3
Número acídico, mg KOH/g de acuerdo a IEC 296; ASTM D-664

0.01
Azufre corrosivo de acuerdo a ISO 5662; ASTM D-1275

ausente
Tensión superficial, N/m, a los 25ºС de acuerdo a ISO 6295; ASTM D-2285

45
Tangente de perdidas dieléctricas a los 90ºС de acuerdo a IEC 247; ASTM D-924

0.001
5 Presión de salida, bar, no menos

1.5
6 Potencia maxima en la entrada, kW, no mas

45
7 Parámetros eléctricos:
Voltage, V

380-485
Alternando con la frecuencia, Hz

50/60
8 Dimensiones exteriores, mm/pulgadas
Ancho

2090/82.3
Alto

2102/82.76
Largo

5150/203.11

oil+purifier+connection

Por favor, observe nuestro pequeño fotoreportaje de los resultados del exitoso arranque de la unidad GlobeCore CMM-12R en El Paso.

Transformer Oil Purification by Bleaching Clay

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During transformer oil purification, not only adsorption, but also other processes such as capillary condensation, chemisorption, flocculation, coagulation have a great impact on the final product.

Very often, so-called Fuller’s earth or Fuller’s Earth filters are used as bleaching clay.  Sorbents, applied for transformer oil reclamation,  should meet the following requirements:

(1) silic acid content in the dry product no less than 32.5%; content of calcium and magnesium no more than 2.2%;

(2) the packed density of grit is no more than 0.65 g/cm3;

(3) the acid number of waste oil should be reduced by 45% per day;

(4) the size of grit grains is 3-7 mm;

(5) no more than 5% of grit grains with the size less than 3 mm;

(6) no other impurities; and

(7) moisture content is no more than 10%;

Bleaching clays may be used both for continuous oil regeneration in transformers with a dehydrating filter breather and for the restoration of oil discharged from power equipment (contact method).

Peculiarities of Transformer Oil Servicing

Filtración de aceite de transformador, ,

Transformer oil is an petroleum product, used to insolate the active parts of transformers under voltage as well as cool and transfer heat during operation.

The performance characteristics of this oil product depend on its chemical composition that is determined from the raw material and methods uesed in its purification.  The commissioning of new electric power transformers requires only fresh oil that has not been previously in service.  Each batch of the product intended for transformer refilling should be certified by the supplier.  But, even fresh new oil delivered to the power facilities should be tested and, if necessary, cleaned of mechanical impurities, moisture and gases before being placed into the transformer.

Performance characteristics of transformer oil are evaluated by the following indicators:

  • dielectric strength;
  • loss tangent;
  • moisture content;
  • gas content; and
  • the presence of mechanical impurities.

Centrifuge processing of transformer oil refers to the classical methods.  Processing by centrifuge forces removes moisture and suspended mechanical particles from the oil.  Centrifugal treatment is applied when refilling power transformers with voltage up to 35 kV or used as a method of pre-treatment.  Long centrifugation is undesirable since it can lead to removal of antioxidant additives that can lead to the premature oxidation of the oil.

Transformer Oil Filtration

Filtration consists of transformer oil being passed through special porous partitions that retain unwanted impurities.

Absorption Treatment of Transformer Oil

The Absorption Treatment of transformer oil absorbs water and other impurities using special substances called “adsorbents.”  Adsorbents may include synthetic zeolites that intended to remove dissolved gasses and moisture from the oil.

Transformer Oil Treatment with Vacuum Units

Vacuum filtration systems provide for preheating of transformer oil up to between 50 to 60 ºС.  Then, the oil is sprayed in the first stage degasser and  flows down in a thin layer along the surface of a series of Rasching Rings.  Simultaneously, the first stage is vacummized by a vacuum pump.   Gas and moisture vapors are pumped through a zeolite cartridge and air filter.  The final drying and degassing of transformer oil is performed in the space of the second stage degasser.  Purified oil comes to the transformer or tank through a fine filter.

Transformer Oil Reclamation Methods

Purificación de aceite de transformadores,

Transformer oil serves as the main dielectric liquid insulation in oil-filled equipment.  Among other things things, it is used to increase the dielectric strength of the solid insulation.  Additionally, in power transformers oil is used to cool and transfer heat, and in high voltage breakers, to quench an unwanted or unsafe arc of electricity.

The general condition of oil, and some index values, may indicate if there are some system defects.  When servicing, oil is exposed to such negative impacts as high temperature, moisture, and contact with atmospheric air.  As a result, dielectric fluid attracts and holds unwanted contaminants.  The performance characterists decline and the oil slowly loses its ability to perform its functions.  Additionally, products of transformer oil aging get into the solid cellulose insulation degrading its condition and ability to insulate.  In general, some irreversible processes that happen to the solid insulation may result in premature transformer failure.

Beginning in the 1970s, used oil has usually just been removed and replaced with new oil.   Such an approach however, is now considered to be higly inefficient due to the high cost of new oil, the labor cost associated with the process and because there is always some used oil left in transformer that will contaminate the new oil.  The used oil gets into the new oil and degrades its performance characteristics.  Additionally, the used oil that remains in the solid insulation continues the degradation process of the kraft insulating paper.

Today, oil reclamation is considered to be a reasonable and cost efffective solution to this problem since it restores oil to its original condition and removes the contaminated oil from the core and solid insulation.  If timely performed, oil regeneration will prevent damage done to solid insulation by aggrissive used oil.  This will reduce operating costs since there will be a reduced need to new fresh oil and the cost of disposing of used will have been eliminated.  The GlobeCore Process of oil regeneration greatly increases the service life of the dielectric oil and the transformer.

And this is no great surprise since the majority of oil-filled equipment failure are caused by defects in the liquid and solid insulation.

There are several methods of transformer oil reclamation that include:

  •    zeolite purification;
  •    filter press purification; and
  •    centrifuge cleaning and drying  (purification, clarification methods)

Zeolite purification is based on mass transfer.  As a whole, it is a very difficult process that includes a wide range of subprocesses:

  1.    Absorption  (gas is absorbed by a liquid or solid substance);
  2.    Adsorption  (the components of the substance are absorbed into the surface of the solid substance);
  3.    Crystallization (substance turns into solid state)
  4.    Dissolution (process that is reverse to crystallization);
  5.   Fractionation (separation of mixtures by repeated component exchange between liquid and gaseous phases, usually moving in counterflow to each other)
  6.   Drying (moisture is removed from the substance); and
  7.    Extraction (substances, dissolved in a liquid, are extracted by another liquid which is not or partially mixed with the first one.

Often, it is the adsorption that is used to regenerate transformer oil.  Today, it is considered to be very effective since no sophisticated equipment is required to perform this process.  The process consists in oil being passed through a layer of sorbent.  Moisture, dissolved in insulating liquid is retained on the surface of the sorbent material.  Other substances that have higher adsorption capacity may also serve as sorbents.  Adsorbent does not have any impact on the hydrocarbon composition of the oil and allows for the properties of the insulating liquid to be preserved.

GlobeCore has many years of experience in developing, manufacturing and promoting regeneration equipment for transformer oil, industrial oil, turbine oil, transmission fluids and other types of industral and commercial oils.  GlobeCore has applied several classical approaches for oil treatment, as well as successfully introducing its own developments due to its experienced engineering staff and knowledge of the world wide market needs.

One of the latest GlobeCore developments is transformer oil reclamation, based on an automatic Fuller’s Earth reactivation system that eliminates hzardous waste and greatly reduces labor demand to complete the processing.  First, it provides for considerable cost savings.  Second, application of such technology contributes to environment preservation and protection.

GlobeCore advanced oil processing equipment operate on energized transformers thereby eliminating the need for an alternative energy source when conducting preventive maintenance.  GlobeCore oil processing equipment is able to restore transformer oil to its original new like condition and greatly extend the service life of your electric power transformers.

Transformer Oil Recondition with Fuller’s Earth Equipment

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GlobeCore introduces transformer oil purification units in the CMM-R line to meet the needs of companies, involved in the generation, transmission and distribution of electric power.
The CMM-R line mobile oil filtration units from GlobeCore provide for the service life extension of transformers,  circuit breakers, and other oil-filled equipment since they restore dielectric strength and chemical composition of insulating oils.

It is essential to ensure the stability and performance characteristics of transformer oil since oil is constantly deteriorating and is influenced by high temperatures, atmospheric oxygen, electrical fields, metals and solid insulation.  Over time, transformer oil turns from a dielectric insulator into a conductor at low voltages which is unacceptable for proper transformer performance.  Once the oil becomes contaminated, it can no longer fulfill its functions and, as a result, becomes unfit for further useas a dielectric insulting fluid.

It is therefore, recommended to use GlobeCore’s mobile oil purificaton stations instead of buying new oil and seeking for ways to dispose of the used oil.

In the oil filtration units, oil is passed through the special sorbent, called Fuller’s Earth that allows for “Molecular Filtration” due to its microporous structure.  Mechanical impurities and products of oil degradation are soaked up by the sorbent granules.  Once the sorbent becomes saturated, the CMM-R units automatically switche to “Sorbent Reactivation” mode where impurities are removed from the sorbent material and exhausted to the special collecting tank and carbon canister.

The CMM-R line has been proved to be very efficient in practice.  The loss tangent of the oil, processed with GlobeCore equipment, is significantly reduced and meets the rated value of the fresh product after the regeneration operations are completed.

GlobeCore equipment may be either purchased from stock, or custom-made. The in-stock mobile oil degassing stations can be bought directly from the warehouse.  GlobeCore’s final assembly facilities are located in Oldenburg, Germany.  Any customized unit will be made within 45 days.
Usually, the CMM-R units are started up and run for about a week before being shipped.  Our specialists will help you to start up the mobile oil purificaton station as well as train your staff.

Once you read this, it means that you might be:

(1) the owner or CEO of a power company.   You are tired of spending much money on recycling of waste oil and purchasing new transformer oil.  You are eager to get effective solutions that will reduce your operating costs and increase profits;

(2)  you are a manager of procurment department.  You have to please the directors by finding the best deals or establishing and keeping trust relationships with suppliers.  In this regard, GlobeCore has the best solution for you:  After many years of doing business, our company has established both corporate and personal relationships with our customers;

(3) you are an engineer that services oil-filled equipment.  After having performed an oil analysis, you have determined that the performance characteristics of the transformer are below the acceptable standards, but you still want to ensure the continued smooth operation of your equipment.  Then you need to purchase one or more of the GlobeCore CMM-R mobile oil stations.  We provide maintenance services, have a warehouse of spare parts and we are always ready to help you.

Let’s check whether you need a GlobeCore mobile oil purificaton station:

  • You want to solve the problem of used oil disposal;
  • You want to save costs on purchasing new transformer oil; and
  • You want the quality of reclaimed transformer oil to comply with  recognized rules and regulations and to serve equipment for much longer than one year.

If you agree with the statements listed above then you are on the right path to the GlobeCore Servoce Life Extention Program utilizing the GlobeCore Process!

The GlobeCore CMM-R mobile oil recondition unit will help you to solve your long term preventive maintenance problems.  The following is the list of the benefits of the GlobeCore mobile oil units:

(1) They come in different design versions: general industry frame (European standards), containerized, mounted on a trailer (two or three-axle trailer), with several different optional arrangements of doors;

(2) may be equipped with an operator’s workstation to meet the customer’s needs;

(3) can be fitted with  (I) additional devices to monitor the oil level in the transformer, (II) generator to provide autonomous operation, (III) inhibition block to add special additives to transformer oil after regeneration.

(4) short delivery terms;

(5) competitive price;

(6) possibility to be trained  by a skilled engineer before purchasing the equipment and during its maintenance.

(7) constituent parts by leading world manufacturers;

(8) the characteristics of reclaimed oil fully comply with the recognized international standards and regulations;

(9) no used oil storage;

(10) cost saving;

(11) low energy consumption;

(12) automated technological processes; and

(13) optional sound and heat insulation;

Reading all this information, you may have the following questions:

(1) For how many years is it possible to extend the service life of transformers by applying the GlobeCore Process to my oil filled electrical  equipment?

The CMM-R units allow equipment owners to extend the service life of a typical transformer between 20 to 35 years.

(2) Do I need to pump out oil from the transformer before regeneration?

No, it is not necessary.  One of the primary benefits of the CMM-R units is that oil processing may be performed on the energized transformer.

(3) Why do I need to use your equipment if I can use the old transformer oil in other units that need lower performance characteristics of dielectric fluid?

Sure, you can, but it won’t solve the problem of its disposal.

(4) Is it possible to use another sorbent instead of Fuller’s Earth?

Yes, it is. The GlobeCore’s CMM-R units successfully operate using other sorbents.  But, Fuller’s earth can be reactivated during transformer oil processing so there is no need to unload and reload sorbent during the processing job.

(5) How long will the Fuller’s Earth last? 

About 300 cycles which is equal to between 1.5 to 3 years of operation depending on the amount of oil process and the overall amount of contamination.  Additionally, regeneration of oil, performed on the GlobeCore’s units allow for loss tangent reduction.

(6) And what about the acid number? 

The acid number is also reduced to the specific values.  The values of these and other performance characteristics of transformer oil before and after regeneration are defined in the table below.

How to Check Oil While Diagnosing Machine Equipment

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The service life of modern manufacturing equipment is 60% determined by oil quality.  A wide range of negative factors that influence machine oil includes:

  1. temperature;
  2. environment;
  3. chemical interaction with other materials; and
  4. electrical fields (for dielectric oils).

If oil has lost its protective properties, it will affect the engine (namely the wear rate will increase).  You should filter oil to prevent such negative consequences.

The GlоbeCоre mobile oil stations are used for oil filtration.  They have the following performance characteristics: (1) energy efficiency; (2) cost-effectiveness and (3) a high-quality filtration process.

But, how will we know that oil needs filtration?  An incomplete oil filtration process may result in great finance expenditures.  It is therefore, a systematic monitoring of oil that is needed to detect changes of the oil’s performance characteristics.

There are two different ways of oil monitoring that depend on the kind of oil the operators want to examine.  It is therefore, desirable to follow recogized international standards concerning each specific oil type when the quality of initial oil product is to be tested and analyzed.

Regonized international standards specify the necessary performance characteristics of oil such as: (1) viscosity; (2) ignition temperature; (2) flash temperature, and (3) total base number.

The second way of testing oil is applied when you want to check the quality of oil that has been already used for some period of time.  In this case, you may also rely on parameters outlined in the international standards.  There are also other possible ways of checking the used oil.  The “tribodiagnostic” process  allows the operator to check the condition of machinery without overhaul or disassembly through the use of oil analysis.  This method however, has not gained widespread acceptance and is mostly used when examining and servicing gas-turbine engines.  The tribodiagnostic consists of the assessment of the composition and the concentration of wear products in oil using special devices (e.g. spectrometer).

The ferrography is used to determine the wear type and friction rate of the machinery.  This process consists of analysing the particle size distribution, their surface condition and the materials they are composed of.

The advantage of this method is that it can be used when working with magnetic as well as non-magnetic materials (graphite, bronze, aluminum, brass, etc.).  Infrared (IR) spectroscopy allows the operators to receive information about such important oil specifications as water content, base number, acid number, soot content, additives, and oxidation products.

The proper sampling is no less important than the analysis itself since the wrong sample may lead to an incorrect diagnosis of the equipment.

Buying and Storing Transformer Oil

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Purchasing transformer oil is an important financial decision for your company.  It should be done very responsibly.

First, the buyer must a choose a brand of oil.  This requires careful consideration based on the type of equipment being used and the operating conditions the oil and the oil’s abilty to meet those conditions.

Second, the cost of the oil must be considered.  A small price difference in the cost of just one liter small can turn into a significant amount of money when purchasing a large volume of oil.

There are no universal recommendations for buying transformer oil. There are however, online services allowing buyers to compare transformer oil prices from various suppliers.  It is up to the buyer to research and choose a reliable wholesale distributor or retailer.

If you have already purchased transformer oil that meets the correct specifications and quality standards, then it is time to think about oil storage.

The practical way to store the oil is to use clean and dry, steel air tight vessels.  The tanks are usually coated with an oil resistant material inside.  The outside of the tanks should have anticorrosion and light reflecting coating.  The acceptable range of temperatures for storage of transformer oil is -40ºС to +60ºС/-40ºF to +140ºF.

The vessels should be equipped with valves for filling and draining as well as a manhole for cleaning, inspection and repairs.  Breathing systems must be equipped with silica gel or zeolite cartridges that can be monitored by special monitoring devices.

Three days after putting the oil into a storage tank, samples are normally taken for laboratory analysis.  Transformer oil in storage should be tested at least once a year for the following parameters:

  •  flashpoint;
  • dielectric strength at 90ºC/194ºF;
  • water extract reaction;
  • acid neutralization number;
  • particulate matter content in mircons; and
  • free water and moisture content.

It is also recommended to test the dissipation factor at 90ºС/194ºF at least once a year.

Each time the oil is tested for quality and purity, the results must comply with the parameters of fresh transformer oil regardless of the length of storage. Otherwise, the oil must be purified and regenerated to restore the oil to its new and clean condition.

GlobeCore offers a line of oil purification units under the CMM classification. These units improve color, remove acids, bases, and other aging products from any turbine, dielectric insulating oil, and industrial oils.

One of the advantages of the GlobeCore CMM line of units is their ability to regenerate oil on an energized transformer.  Another important advantage is the ability to reactive the fuller’s earth sorbent inside the unit many times over, reducing downtime for sorbent replacement and replenishment.

After the processing of transformer oil with GlobeCore equipment, transformer insulating oil is restored to an as good as new condition.

Purchasing a GlobeCore CMM unit gives you a modern efficient machine that is easy to operate and service.  The use of GlobeCore equipment and GlobeCore Process will extend the service life of the oil and the transformer significantly.

Selling Transformer Oil: The Right Way to Supply, Receive and Accept the Product

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In any business, be it a toy store or transformer oil sales, there are many fine points to consider.  Knowing them will save you time and money.  In this article, we will look into the process of supply and receipt of transformer dielectric insulating oil.

Every sale of transformer insulating oil must be accompanied by the correct technical documentation.  The information required on the batch can be given in original certificates or in official extracts from the original documents.

Receipt and acceptance occurs before removing the oil for use from the shipping container or tank. Ooil samples must be taken and analyzed for compliance with  the product’s claimed and documented performance specifications.  Among the parameters that must be varified are:

  • dielectric strength;
  • flashpoint;
  • acidity;
  • water soluble acid and base content;
  • particulate matter; and
  • water.

An analysis of the oil’s oxidation stability and dissipation factor at 90ºС/194ºF should be performed for electric power transformers of 110kV and above.  This analysis should also include transformers of especially important facilities regardless of the voltage class or level.  If the oxidation stability analysis is to be performed after the oil leaves the shipping container, it is recommended to take samples in the presence of the oil supplier.

For the protection of your company whether buying or selling, and to facilitate arbitration in the matter, should the need arise, one of the samples should be sealed and stored.  This will provide all the parties with an used sample of the oil so that the initial oil quality may be detemined even after the oil has been used.

Samples are taken in the following cases:

  •  If supplied in rail road or truck tanks, samples are taken before draining from each tank
  •  If supplied in barrels, the number of samples is determined by the terms of supply, however, there should be at least 1 sample per 10 tons of supplied oil.

If the results of the laboratory analysis are favorable, the transformer oil is taken to the client and pumped into the buyer’s tanks.  The oil is then either stored or treated before being used in oil filled equipment like transformers and oil filled switches.  Transformer insulating oil is transferred from tanks through hoses using additional special equipment at the storage facility.

If the lab results show that the purity of the oil is not in compliance with the established standard(s), the product must be purified immediately or prior to placement in the oil filled equipment.  Failure to do so will most likely result in preamture equipment failure and unscheduled equipment down time.

GlobeCore manufactures and supplies mobile oil treatment units such as the Mobile Oil Station type CMM-M.  The GlobeCore CMM-M units are designed for degassing, removal of particulate matter and heating of dielectric insulating oils used in electric power transformers of up to 1150 kV.  The CMM-M units can be used to heat oil filled electrical systems with hot oil as well as for vacuum drying and vacuumizing of oil filled equipment.

The following advantages of the GlobeCore CMM-M units should be noted:

  • Purification of dielectric insulating oil in one cycle;
  • Significant service life extension of insultaing oil and equipment;
  • Wide range of equipment options; and
  • Simple operation and servicing.

The CMM-M units can operate in one of three modes:

  • filtration;
  • filtration with heating; and
  • thermovacuum purification and oil degassing.

The Transformer Insulating Oil Filtration Process

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The dielectric properties of transformer oil (e.g., breakdown voltage or dielectric loss factor) can be significantly improved by degassing and the removal of water and moisture from the oil.  Only clean and uncontaminated oil with the correct specifications is suitable as the liquid insulation for electric power transformers.

Often though, even new and unused transformer oil can be considered unclean and unsafe for use in electric power transformers as the oil can become contaminated during transport from the oil producer to the transformer operator.  During the time the oil is being used in the transformer, it will absorb moisture, dirt particles, fibers, soot and other products of oil and transformer aging.

The transformer oil therefore, needs to undergo a comprehensive filtering process.  The filtering process must be able to remove contaminants that includes solids, free and dissolved water and dissolved gases.

The filtering process of transformer oil is a complex procedure of removing the above described contaminants down to acceptable levels.  In recent studies, experts have revealed that serious problems can occur when insulting oil makes contact with moisture, flammable gases, and other transformer decay products.  In order to make the necessary correction, the operator should regularly monitor the condition of the insulating oils.

Companies that produce equipment for processing transformer insulating oils, cover a wide range of services and products.  They include such things as machinery for filtering transformer oil, insulation oil cleaners, cleaning systems for lubricants, machines to filter hydraulic oil, regeneration equipment for turbine oils and other industrial oil filtering equipment.  In recent decades, there has become a comprehensive network of high-tech enterprises that operate around the world.  They provide integrated systems and parts for the implementation of the transformer oil filtering and regeneration processes.

The transformer oil filtering process is a continuous circulation of oil through purification units in a closed loop system.  The oil passes through several filters of both coarse and fine filter mediums before the system further cleans the oil through a  vacuum drying, degassing and adsorption process.  The process is designed to remove dirt, sludge, foreign particles, dissolved gas and other contaminants found in the oil.  Moreover, the filtering unit can continuously analyze and control the oil at all stages of the purification process.

All systems for filtering transformer oils should have certain safety features built in such as liquid level detectors and pressure sensors.  These safety features should be incorporated into the design of the cleaning equipment.  They are needed in order to maintain the necessary level of oil inside the transformer and to prevent oil spills

The design of filters and pumps should provide for a filtering process, vacuum and degassing process that is powerful enough to quickly and efficiently process oil, without affecting the continued operation of electric power equipment.  Assessment of the effectiveness of the process is provided with tools for monitoring flow rate.

GlobeCore does all of this and more!  GlobeCore has a line of oil processing equipment that has become the most popular and cost effective equipment in the industry.  Take a look at GlobeCore and see if your company can benefit from the GlobeCore Process!

Transfromer Oil Purification Equipment by GlobeCore

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Application

CMM systems designed and manufactured by GlobeCore can perform the following functions: Degassing, dehydration and filtration of transformer oil, cable oil, turbine oil, and other industrial oils.  The CMM units remove gases, free and soluble water, and particulate matter from oils and fluids.  The CMM units are used in the installation, repair and operation of oil-filled high voltage equipment up to 1150 kV (power transformers, high-voltage switches etc.) as well as industrial turbines.

The GlobeCore CMM units perform the following services:

  • Purifying and drying of Transformer Oil
  • Vacuum filling of Transformers and Electrical apparatuses
  • Drying and Purifying of oil in transformers (on and off-line)
  • Vacuum Drying of Transformers
  • Degassing of Transformer Insulating Oil
  • Filtration of Transformer Insulating Oil

Technical Description

GlobeCore CMM units are designed as multipurpose Transformer Oil Conditioning units for field or factory use.  The units incorporate high capacity multi-stage electric oil heaters,  large capacity Vacuum Pumps with external connections for Vacuum filling work, three (3) stage particulate filtration systems, and connections for a large variety of service applications.

The Unit’s measuring devices include vacuum, pressure, and temperature meters.  The equipment can also be optionally supplied with a “water-in-oil” measuring device.  Installation of a water-in-oil measuring device allows in-line monitoring of water content.

Flow rates are variable from 0 to >10,000 liters per hour (L/H) and heating from 24KW to 210 KW in four stages.  GlobeCore systems are designed for easy operation and maintenance.

The principal functions of transformer insulating oils are to serve as a dielectric medium and as a transformer coolant or heat transfer medium.  In order to perform these functions, transformer oil must have the necessary qualities at the time of initial impregnation and filling at the factory and later be able to maintain the same quality in normal operation.

High Vacuum Treatment improves insulating fluids that includes transformer oils and silicone fluids. GlobeCore transformer oil purification equipment was developed as a result of 30 years of experience in vacuum treatment of transformer oils.

Benefit

Every company dealing with oil-insulated high voltage equipment (transformers, high-voltage switches, turbines, etc.), shares the problem of having to change and dispose of contaminated oil and fluids.  The costs of changing and disposing of insulating oils are frequently very high and need a significant investment in time, labor, and money.  At GlobeCore, our equipment offers a practical, proven and economical method to purify oil so that it can be used again and again for your high voltage equipment.

Thermally accelerated Vacuum Dehydration and Degassing of Transformer Oil has gained wide acceptance as one of the most economical methods for the removal of dissolved water and gases.

On-Site Transformer Oil Purification is the most cost effective transformer maintenance service in existence today.  The GlobeCore CMM units not only purify the oil within the transformer, but actively regenerate the Transformer Insulating System by removing impurities that had become built up within the transformer over time.

Thermo-vacuum purification and degassing of transformer insulating oil, as performed by the GlobeCore Process, will result in the improvement of the condition of the entire insulating medium of your electric power transformers.

Here are some additional benefits of the GlobeCore Process:

  • Removal of dissolved moisture from transformer insulating oil
  • Reduction of combustible gases and oxygen
  • Improvement of insulating oil dielectric values
  • Improvement of transformer insulating oil power factor
  • Extension of oil service life
  • Extension of transformer service life and reliability

We at GlobeCore are committed to provide our customers with high quality products that satisfy technical and economic objectives.  We offer our vast experience in manufacturing, servicing and operation of transformer oil purification systems to your company.

Machines by GlobeCore come with a block of approved original equipment spare parts.  These spare parts meet all specifications required of the engineering process.  Over the years, optimal and high quality components have been carefully selected for our equipment.  GlobeCore guarantees the performance of our machines and the results of the oil treatment processes.  We have placed our equipment in more than 70 countries around the world and a reference list available upon request.

Short Process Description

Hot Filtration Mode

A gear type pump draws in the oil for processing via a valve and a strainer.  Processed oil is then pumped through the cartridge filter, the three-way valve and is then discharged to the processed oil vessel via a connecting line.

The above mode is also used for transformer core drying.  Transformer oil is circulated through the oil purification equipment.  After filtering the oil to remove the particles, the oil is heated up to max. temperature of 800C/1472F.  All residual gases are removed and the moisture is evaporated in the vacuum degassing chamber.  Residual moisture content can be reduced down to less than 3 parts per million (ppm).  Oil purification is a necessary maintenance process for oil-filled transformers and can be employed for removal of moisture from the transformer’s core and solid insulation. Heating of the transformer oil moves the moisture from paper to the oil and allows for its removal from the transformer.  The most common mistake made by operators of transformer oil purification equipment is to stop the drying process after reaching oil moisture content of less than 5 ppm.  After some time, when normal transformer operation conditions exist, the moisture content of the oil increases. It is essential to dry the transformer oil continuously throughout a long period.

Transformer Evacuation

Another required process is the immediate evacuation of the transformer after pumping the insulating oil out of the transformer tank.  The “Vacuum Effect” on the insulation surfaces greatly improves moisture content removal.  The process must be repeated several times before the desired effects will be achieved.

Hot Filtration and Thermo-Vacuum Drying

A gear type pump draws the oil in for processing via a strainer and cartridge filter.  It then directs the oil to the heat exchanger where the oil is heated by the heat conductor.  The oil is then fed to the vacuum drier’s sprayer after being heated to 60C/140F.  The Vacuum Pump maintains vacuum in the vacuum chamber.  a Vacuum can be regulated by valve(s) and monitored on the vacuum meter.  Filtered hot air comes into the chamber and removes gases and vapor from the oil’s surface effectively drying the oil.  The air is then discharged into the atmosphere via an oil separator by the vacuum pump.  A gear type pump then directs the oil into the processed oil vessel.  A programmable thermal regulator switch monitors the plant’s function continuously and maintains the pre-set temperature.