Use Cases

October 10, 2017

A Practical Exercise In Transformer Oil Filtration

Purification, filtration and degassing plants are some of the most common systems for treatment or restoration of transformer oil, which has lost performance properties partially or even entirely. Due to the heavy loads on transformers and other oil filled electrical equipment, and also due to the influence of internal factors, such as moisture, and temperature, transformer oil degrades or ages during operation. With time, using such degraded oil...


June 27, 2017

Best Way to Transformer oil degassing?

Transformer oil degasification

Oxygen found in transformer oil leads to oxidation and significantly reduces the dielectric strength of the oil and the insulating system.  In general, under normal atmospheric pressure, the insulating oil contains approximately 10% of atmospheric air.  The higher the temperature, the better the dissolution of air in oil wll be.  It is highly important to understand that the composition of atmospheric air and the air dissolved in oil,...


Servicing Transformer Substations: Emergency Response

Servicing of transformer substations is a very important process which facilitates reliable transmission and distribution of power. A part of this service is a possible emergency response.

During the service life of equipment most of defects do not appear immediately, but develop gradually. An example would be the destruction of cable terminals by high temperature. Another cause of accidents is excessive vibration, which has a gradual effect....


March 30, 2017

Integral Transformer Substations for Indoor Installation

Integral transformer substations are built for indoor and outdoor installations. This article looks at indoor substations.

It is designed for unheated premises of industrial enterprises. The substations with one transformer (right and left) and two transformers (in single line and parallel)  are very common. In the two transformer substations the sections are connected by double busbar systems. Depending on the requirements of the distance between the opposite...


March 30, 2017

Electric Purification of oil

Purification of oil. Mechanical impurities in oil are removed by an electric field. This approach is not entirely new, but it is not widely used at this time due to insufficient studies of the processes occurring during the interaction of the electric field and oil.

Electro-cleaning sediments suspended particles under the influence of an electrostatic field, which appears between the electrode and the particles. Particles acquire a...


March 30, 2017

Compressor Oil for Piston-type and Rotary Compressors

Compressor oils are divided into classes depending on their application and requirements. The most common classifications is:

  • Oils for rotary and piston-type compressors;
  • Oils for refrigeration compressors;
  • Oils for turbo machines.

Let us consider in full detail the oil of the first type. It is used for lubrication of compressors in transportation and various industries. Requirements for the rotary and piston type compressor oils...


Heating oil: properties and uses

Compared with diesel fuel, heating oil has a wide range of applications due to its composition.

Heating oil is produced from used diesel fractions in direct fraction distillation. Fractional composition of heating oil can be harder than fractional composition of diesel fuel. The viscosity of heating oil is 8 mm2/sec, and diesel is 6 mm2/sec.

To date there are no regulations that impose restrictions on the...


March 27, 2017

Transformer oil testing: determining moisture content

Transformer oil testing. Technical requirements for transformer oils are stated by the standards. At the same time, these standards do not directly regulate the moisture content of oil. The regulation in this case is done indirectly by a number of parameters, such as density, flash point, viscosity, content of KOH, dielectric strength, and others.

The moisture content in insulating oil is now determined by a visual inspection,...


March 13, 2017

Combined Methods for Waste Oil Purification

Waste Oil Purification. Waste oil treatment uses a combination of approaches based on different methods (force field and porous membrane).

Centrifuges use a combination of electric and centrifugal fields. The electric field is generated by the outside power source or the triboelectric effect, creating a non-uniform field that improves the efficiency of cleaning.

The cleaning efficiency of waste oil can be increased with ferromagnetic particles in...


March 13, 2017

110 kV Transformers: Structural Features

Power transformer is an important part of the electrical power transmission system. It converts one voltage to another, starting from 110 kV transformers to 220 kV transformers. In this article we will talk about the design of 110 kV transformers.

In 110 kV transformers there are bushings at the top and the neutral wire at the bottom; the core is made from windings of low-voltage and high-voltage...


March 13, 2017

Where Does Used Industrial Oil Go?

Industrial Oil. Industrial oils are widely used in industry for lubricating friction parts.

In adverse operating conditions, with increasing running speeds, loads and temperatures, there are higher requirements to the quality of industrial oils. Even the liquids of the highest quality do not guarantee that they maintain their properties for the duration of the service life. They are contaminated with metal particles, particles of rubber seals and...


February 13, 2017

A Winning Combination: Dielectric Oil Purification and Transformer Vacuumizing Unit

 

Restoration of the insulation system is an essential part of power transformer maintenance. Before new oil is pumped into the transformer, all air must be removed from the tank, as well as moisture and gas, accumulated by the insulation system when the transformer is open. During operation, the insulation system performance gradually declines due to moisture, air and particulate matter contaminating the dielectric oil. This can...


February 3, 2017

GlobeCore: Oil Purifier Protects Power Transformer and Extends Its Life by 20 Years

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...


January 10, 2017

Oil Purifier

Oil Purifier

During storage and transportation transformer oil comes in contact with air and gases, decreasing its dielectric strength by 20-30%. The air solved in...


Transformer Oil Chromatography Analysis

Knowing the condition of transformer oil is important to maintain and extend its service life. It is important to make timely decision on changing or regeneration of the oil, avoiding danger to the transformer.

Chromatography analysis is one of the most efficient methods of early diagnostics of insulation fluids. It allows to see the dissolved gases, which are the result of solid insulation or oil decomposition. This...


How to Handle Waste Motor Oil

Environmental concerns are now one of the highest priorities. Environmental issues are obviously related to generation and disposal of waste. Waste is a significant problem for many facilities and businesses. Among such waste, waste oil of various types, such as motor, transmission or industrial oil are generated in large volumes.

After removing the oil from the production or processing cycle, facilities store it in special tanks for...


January 6, 2017

Fyrquel Fireproof Liquid: General Characteristics and Purification Methods

Purification of Fyrquel. Fyrquel synthetic fireproof liquid is based on phosphoric acid esters, which make it fireproof. This is very important when the material is used in critical conditions, such as:

  • gas turbine lubrication systems;
  • steam turbine electrohydraulic control systems.
  • hydraulic systems of furnaces for aluminum and steel melting;
  • air compressors.

Fireproof liquids reduce the risk of fire which exists with mineral oil


January 6, 2017

Properties of Transformer Oil

Properties of Transformer Oil. Modern technologies allow to make quality transformer oil from any crude oil. However, not all types of oil can retain its properties for long, and degradation of the product may begin from the very first day of its use in a transformer. Different types of oil age at different rates.

Therefore it is recommended to evaluate oil and determine their usefulness based on...


December 27, 2016

Waste oil as a commodity

Sooner or later, businesses owning oil-filled equipment have to face the question of waste oil handling. Over time, oil ages and becomes contaminated. In order to monitor its state and possible further use, samples of oil are taken for analysis.

Existing legislation prohibits dumping waste oil into the environment, it must be collected and recycled. Very often used oil is stored in tanks taking up a lot...


Oil Pump Operating Principle And Structure

The main purpose of an oil pump is to create pressure that allows oil pumping in the desired direction.

Depending on the type of control there are adjustable and non-adjustable oil pumps.  The main difference is that in the devices of the first type maintenance of constant pressure is provided by adjusting productivity, and in the second type devices by a pressure reducing valve.

Gear pumps...


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обновлено: July 7, 2017 автором: globecore