Substation: Functions and Purpose

An electrical substation is a part of electric energy conversion and distribution system. Substations are designed for all voltages. They convert voltage from high to low and in reverse.

The electrical network defines the purpose, power and voltage of substations. The loads depend on the consumers. Let’s consider the main types of substations.

Converter stations are used to transmit and receive high voltage current. The main...

Oil Refining Process

Oil refining process. Crude oil just extracted from the well in its original form has a very limited application. Therefore it is processed before it arrives on the market in the form of gasoline, fuel oil, aviation fuel, etc.

In the early stages of the oil industry the refining process was reduced to primitive distillation. The “black gold” was brought to the boiling temperature, with condensation of...

March 30, 2017

Waste Oil Collection

Waste oil collection. Organizing waste collection is a part of waste management that includes technical support and quality control of collection, storage and transportation.

These duties are performed by the Supply Chain Management Division  that regulates standards for collection and use of petroleum products. The standards include the conditions of collection, delivery and use. The management division also provides financial support, encouraging high-quality collection of waste oil...

March 30, 2017

Power Plants and Substations

A power plant produces electrical energy. Depending on the process of energy conversion there are nuclear power plants, thermal, gas turbines, pumped hydroelectric energy storage, etc.

The substation is a facility responsible for the conversion and distribution of electricity.

Now the standard for AC frequency is 50Hz or 60Hz. The three-phase electric power is more economical than single-phase power transmission. In addition, three-phase power allows to...

March 30, 2017

Compressor Oil: Properties and Removal of Impurities

Compressor oil is used in the industry as a lubricant for the valves and cylinders of compressors; it is also used as a sealing medium for compression chamber and piston rods.

The main feature of that distinguishes compressor oils from other industrial oils is their operation in high-temperature environments and mixing with coolants. Therefore, compressor oils need to meet stringent requirements regarding chemical and thermal stability, as...

Household heating oil

The issue of inexpensive heating of small structures, like country houses, is very important. Despite the decline in oil prices, the products that are made from it are still expensive. The solution is to use alternative sources, or buy oil products at low price. In this article we will talk about the latter, an inexpensive oil product, more specifically: heating oil.

Hydrocarbons in the heating oil have...

March 27, 2017

Drying of silica gel

Silica gel. The industry uses various adsorbents to remove excess moisture. Today, there are many types of adsorbents of natural and synthetic origin. A special place among the adsorbers belongs to silica gel.

Silica gel is a dried gel obtained from oversaturated solutions of hydrated silica. The main feature of silica gel is its large specific surface area of approximately 1000 m2 / g. Silica gel is...

March 13, 2017

Diagnosis of Power Transformers by Insulating Oil

Diagnosis of power transformers helps to identify potential problems and failures in order to prevent and remove them.

It is recognized that the analysis of breakdowns of transformer insulation also detects anomalies in oil-filled equipment. For example, when metal parts of the transformer are overheated, the oil accumulates gases, carbon and metallic particles. The most dangerous of them for the insulation system are conductive particles of carbon...

February 9, 2017

Oil Degassing

January 13, 2017


The primary focus of  GlobeCore is the development and production of transformer oil regeneration equipment. Among the methods of regeneration the most widely used is adsorption treatment. It is particularly effective for processing the oils containing dissolved products of aging. The adsorbent becomes gradually saturated and requires recovery of its properties. Generally, the reactivation process takes 18-20 hours.

But not all of our customers have the opportunity...

December 5, 2016

Organize your own businesses with the purchase of waste oil

These days the Internet has adverts to “Buy waste oil.” These ads can cause some confusion and raise a number of questions. For example, why collect waste oil, which seemingly cannot be used as intended? Let’s try to understand.

In most cases, these ads are from people or companies involved in regeneration of waste oil. The regeneration in this case is the restoration of operational properties of...

October 12, 2016

Transformer Oil Application

Transformers are an integral part of power distribution systems.  Their main task is to convert voltage.  In most of these devices the heat is removed from hot parts to cooling devices with the help of transformer oil which is also used for insulation of live parts.  Only some transformers use synthetic non-flammable liquid.

Transformer oil is usually used as a dielectric fluid in insulation systems.  The types...

Regeneration of Used Motor Oil

Waste oil is the major part of all oil refinery wastes collected and accumulated by transport and industrial enterprises.  Depending on the type of application, all waste oils are conventionally divided into groups:

  • UMO – used motor oils.  These include diesel, aviation, automotive, and motor oils used in hydraulic systems and transmissions;
  • UIO – used industrial oils.  This group includes transformer, hydraulic, compressor and turbine oil;

October 8, 2016

Transformer oil application

Transformer oil is a substance produced by refining of crude oil and is intended for power and measurement transformers, reactors and oil switches.

The use of transformer oil in these systems is due to its good insulation and heat dissipation properties, as well as the ability to protect solid insulation from moisture.

Among the electrophysical properties of the oil, the more important ones are the high dielectric strength and low dissipation factor.


October 5, 2016

The oil border - transformer oil testing

Transformers are one of the main components of the complex equipment of many energy (power plants, substations, converter devices) or industrial enterprises.

This equipment, depending on type and capabilities, can be operated in a wide range of conditions with varying load. Since transformers are an efficient energy transformation mechanism, it is important to maintain them correctly to preserve reliability throughout their lifetime, to avoid costly damage and...

October 3, 2016

Operation and maintenance of transformers

Operation of power transformers involves such processes as external inspection, measuring oil temperature and load, phasing, oil testing, corrective and preventive maintenance, overhauls etc.

Inspection is performed once every six months. It includes checking the level of oil, checking for leaks and inspecting insulators.

Each transformer should be equipped with a thermometer measuring the temperature of the insulation liquid. This parameter should also be recorded into a special logbook.

If the transformer operates...

September 23, 2016

Specific weight of transformer oil

Specific weight of transformer oil is the ratio of its weight at 20ºC to the weight of the same volume of water at 4ºC.

Usually this parameters is not regulated and is within 0.856 to 0.886. If the oil is heated, its specific weight decreases, and vise versa when the oil is cold. When the insulation liquid cools or heats, its specific weight changes by 0.0007. This temperature coefficient is used...

September 23, 2016

Transformer oil properties

Transformer oil serves as a heat dissipater for heating parts of the transformer and as insulator of energized components. To function efficiently, the dielectric fluid must have certain operational characteristics.

Color. For quantitative evaluation of transformer oil color it is viewed in through light, then compared to digital standards. The oil can be cloudy, containing sediment and suspended particles. In practice, color is not the decisive factor to stop using the...

September 18, 2016

Transformer oil viscosity

Viscosity is a parameter which allows to access performance of many materials. In case of transformer oil, viscosity is connected to its cooling ability.

According to the accepted classification, there are dynamic, kinetic and relative viscosity.

Dynamic viscosity is measured in Pascal=seconds and is determined based on Stokes law or Poiseuille law.

Kinetic viscosity is measured in square meters per second. Its numeric value is obtained by dividing dynamic viscosity of the oil...

September 13, 2016

Filling transformer with oil

Filling of oil into power transformers is an important operation; the reliability of electrical equipment largely depends on it. This filling is usually performed using oil processing units.

Oil filling depends on the transformer voltage class. If the voltage is below 11 kV, oil can be filled without vacuum, with the temperature of the dielectric liquid above 10ºC. An oil purifier is connected to the transformer tank, and the oil is...

1 2 3 5
обновлено: June 2, 2016 автором: globecore