First of all it is necessary to mention that oil, used in different industries is usually a special formulation made to meet the needs of that particular industry. To gain a better understanding of the regeneration process, one should understand that to meet the needs of a particular industry, base oil is mixed with additives that improve its lubricating properties.
Very often, people confuse such...
Insulating fluids are used in many types of high-voltage electrical equipment, such as transformers, switchgear, capacitors and cables. The insulating liquid has two main functions: dielectric and coolant.
Additional functions of insulating liquid are arc quenching in circuit breakers, protecting the internal insulation from outside air and moisture and providing samples for diagnosing the equipment.
Due to these characteristics, insulation fluid has been widely used for...
Substation. Substations are an integral part of modern electric power systems. They are used in every electric grid. Modern substations are complex units for transmission of electricity from high-voltage lines to households.
Complete transformer substations are compact arrangements for receiving, conversion, distribution and metering electricity.
Depending on the type of connection to the high-voltage lines there are one-ended substations and double-ended substations. The main difference is...
Oxidation effects. Transformer oil fills power transformers and other high-voltage devices providing reliable isolation and removing heat from the hot parts of the equipment. In high-voltage circuit breakers the oil also acts as an arc extinguisher.
Generally, insulating oils work at high temperatures (70-80 °C). Temperature and air cause the oil to oxidize, resulting in insoluble precipitation of sludge, acids, water and other products of aging.
Compressor oil. The marking of compressor oils was developed in the 1980s and has not changed to this day.
There are three major groups of compressor oils:Oils for compressors operating at partially-loaded conditions, and compressing air and gas, insoluble in the oil, at discharge temperature below 160 ° C; Oil for compressors operating at discharge temperatures below 180 ° C; Oils for compressors operating at full-load conditions at discharge...
General transformer maintenance is required for on-line detection and elimination of various defects to avoid failures in emergency situations.
In this article we will talk about transformer oil testing. The tests determine the current state of both the oil and the transformer parts. The results may serve as the criteria to undertake general maintenance.
Let’s start with the fact that transformer oil serves as an insulator,...
Engler viscometer is used for measuring the viscosity of lubricating oils. The first prototype of Engler viscometer is probably the unit constructed by Lomonosov in 1752. It measured the viscosity of liquids by the number of drops. This idea was the basis for the Engler viscometer.
The device consists of an oil cup with a spherical bottom. In its center there is an oil tube with a...
Base oil groups. Base oils are oils that were previously purified from unwanted components and contain no additives. Base oils serve as the basis for most commercial oils, and at the same time the market is receiving a growing amount of synthetic and mixed oils.
When selecting a base oil, it is important to consider its economic performance and operational characteristics. To improve the performance properties of the base...
Processing of Waste Oils. Organized collection and recycling of waste oil allows to save 30% of valuable oil.
Vehicle fleet owners use regeneration systems to regenerate waste oils and significantly reduce the amount of harmful emissions into the environment. But these purification and regeneration systems are too expensive for small companies; they rely on outside services.
Discharge of waste oil without collection equipment and facilities results...
Moisture removal from transformer oil is an important part of maintenance of insulating liquid.
This problem is solved by using AC or DC electric fields. In practice, the most common are DC machines. The electric oil dehydration takes place through bipolar coalescence or dielectrophoresis.
In the coalescence process, the microdroplets of water become dipoles, causing attraction and fusion. The strength of attraction increases with increasing the...
Remove Solid Particles. Solid particles are the most common and the most unwelcome contaminants of mineral oils. They are removed by physical, chemical and physico-chemical methods. In this article we will look at the physical processes, such as sedimentation and centrifugation.
The use of gravity is perhaps the oldest method of cleaning contaminated oil. It is not surprising, because it is relatively simple. If the water microdroplets...
Package Transformer Substations. A transformer substation increases or decreases voltage, distributing electric power. Such substations usually include a power transformer, distribution devices, auxiliary structures, control and protection devices. There are step up or step down substations depending on what they do with voltage.
Substations are manufactured by specialized factories. After the order, the substation is shipped to the installation site. It usually comes assembled, although partial shipments...
Substation Grounding. High voltage is used for long-distance transmission of electrical power. The line going to the consumer is usually under 6 to 10 kilovolts and to reduce the voltage to the usable 0.4 kV substations are required.
Substations are grounded by the external and the internal circuits. The external grounding circuit is a horizontal grounding assembled from vertical electrodes. Steel strips are used to make horizontal...
Modern Substation.. Electrical substations is an important link of the modern power transmission grids due both to their function and number. At this time, approximately 40% of substations are nearing the end of their service life and require redesign. Substations design and construction is a common and rapid process in the developing countries.
Specialists point out the benefits of designing “smart systems”, which includes equipping transformers with...
The Lifetime of a Power Transformer. Annual losses caused by power supply interruptions, reach into millions or even billions of dollars. The issue of power generation, transmission and distribution is of strategic importance.
One of the essential elements of the power grid is the transformer. Knowing the condition of a transformer and its estimated lifetime allows to efficiently manage the costs and minimize possible losses.
The purpose of the oil pump is self-explanatory. This is a device to exert pressure on the oil to transport it from one place in the system to another.
In terms of control, there are two types of pumps: one type can adjust pressure in the system by changing capacity, others cannot.
There are two types of oil pumps:rotary pumps; gear pumps.
Rotary pumps push the...
Oil can be of various kinds, but the most popular are:diesel oil; industrial oil; transformer oil; compressor oil.
The oils are usually produced by mixing (compounding) of basic distilled oils with each other or with residual components. To improve the product, additives are required. The amount of additives varies from 3 to 17%. Oil refining specialists consider mixing the most important process in the final stage of oil production.
Corrective maintenance of oil transformer is performed according to mandatory schedule and according to the current condition of the transformer.
Corrective maintenance includes certain measures, such as external inspection and repairs, cleaning of insulators, radiators and the tank, removal of dirt from the expansion tank, adding oil, sampling of oil and making all the necessary measurements and tests.
The first thing to pay attention during repairs...
Speaking about such concept as “transformer oil price”, it is necessary to consider all possible criteria and circumstances.
Transformer oil fills power transformers and circuit breakers. It is made from crude oil, so it is quite obvious that the price of oil is influenced by the market price of “black gold”.
One of the most important properties of transformer oil is resistance to oxidation. This property...
GlobeCore is one of the leading manufacturers of oil purification and regeneration equipment, as well as maintenance equipment for power transformers.
This article shows the benefits of GlobeCore equipment which brought the company to the top position in the world market.What equipment does GlobeCore produce?
Absorption dryers are used for drying transformer oil. GlobeCore absorption dryers’ main advantage is the ability to use virtually any known...
Name: Helen Galchenko
Position: Sales Manager
Place of work:GlobeCore GmbH
Education: Institute of Economics and Law
Experience of work: 8 years as sales and purchase manager
Family: married, have 4 year old daughter
Interests:car driving, playing with dogs, travel.
TRANSFORMER OIL REGENERATION SYSTEM
Electric Power Transformers are widely used in the energy sector and normally have a long service life provided they are operated properly and receive timely preventive and corrective maintenance. Recent research however, shows that the failure rate of transformers has been growing annually for several years. The main problems are related to damaged paper insulation surrounding the windings, voltage regulators, and inputs. Why you may ask? Well, most, if not all. damage to the insulating paper can be traced back to problems with the dielectric insulating oil.
The insulating paper is the heart of the transformer and oil is the life blood of the transformer. Once the oil becomes contaminated with acids, moisture and particulate matter, it will transfer these contaminates into the insulating paper. The paper will then begin to degrade and lose its insulating properties and that will eventually lead to premature transformer failure. There is a wise old saying. “An ounce of prevention is worth a pound of cure.” It is therefore, better to maintain your transformers and prevent failures before they happen.
The service life of your transformers life can be extended considerably using the GlobeCore Service Life Extension Program featuring the GlobeCore Process and our SMM-R Oil Regeneration units manufactured in our factory. These systems allow you to restore the dielectric strength of insulating oil and restore the transformer insulting oil back to its original new condition. The GlobeCore Process makes it possible to extend the life of your transformers to between 20-35 years. Many industry professionals are convinced that there is no reason to buy new transformers if the GlobeCore Process is used to service your aging transformer fleet since the process can save old transformers and extend service life. If the process is implemented early in the service life of a transformer, an even greater service life extension can be achieved.
A “Unique feature” of the SMM-R regeneration unit is the usage of a sorbent material known as “Fuller’s Earth.” The Fuller’s Earth sorbent can be regenerated and used over and over again in processing and filtering transformer oil. The Fuller’s Earth resource will continue to be viable for between 2 and 3 years and it can filter over 90 tons of oil before being safely disposed of without causing environmental harm. The Fuller’s Earth sorbent is considered environmentally friendly and can be later used as a construction material. The GlobeCore Process has been able to reach a high level of positive results in processing of transformer oil when using the Fuller’s Earth sorbent materials. The GlobeCore Process of regeneration using Fuller’s Earth is easy and can be performed by one person directly on the transformer in either energized or de-energized mode. The process purifies, degases and restores the oil and is capable of removing the contaminates from the core, windings and the insulating paper. This makes the GlobeCore Process the most advanced and cost effective transformer maintenance system in the world today.
PROCESS OF REGENERATION
Transformer oil is pumped through the sorbent by means of a pump. Sorbent is kept in several cylindrical columns through which the oil flows as part of the filtering process. After the oil passes through the sorbent, the oil is then filtered by means of a second filter for fine filtration. The oil moves in the vessel for the process of oil collection. The sorbent material has a micro pore structure allowing for molecular filtration. During the process of filtration, harmful impurities and products of oil decomposition are left in the granules of the sorbent. Once the sorbent reaches the point of saturation with impurities, the unit starts the sorbent reactivation process automatically. During the course of sorbent reactivation, the micropores of the sorbent are cleaned and harmful impurities are removed and placed into a special collector and coal filter. The Fuller’s Earth Sorbent is capable of completing approximately 300 regeneration cycles before it must be replaced.