Dissolved Gas Analysis Test (DGA) is a commonly employed method for evaluating the health of transformer oil. This approach detects and measures the amount of dissolved gases in the oil to assess the transformer’s overall condition. The existence of certain gases reflects the degree of wear and indicates possible problems within the transformer. This articleRead More

Power transformer monitoring is a crucial practice aimed at guaranteeing their dependable and effective functioning. Power transformers serve as essential elements within the electrical power network, tasked with conveying and dispersing electrical power from generation facilities to end-users. A malfunction or breakdown in a power transformer may lead to electricity disruptions, system inactivity, and considerableRead More

Transformer oil is used in high-voltage equipment as an insulating medium due to its higher dielectric strength compared to gases, for example. However, while in use, oils may experience a breakdown which means losing the ability to withstand high voltages. A breakdown poses a risk of failure to expensive electrical equipment: transformers, oil-filled cables, capacitors,Read More

The efficiency factor of a transformer never reaches 100%; in principle, just like with any other device. This is due to the fact that there occur power losses of transformers during operation. These losses take place in the copper conductors of the winding and in the magnetic core (magnetic circuit) made of steel. In thisRead More

Dielectric breakdown measurement is performed in order to assess how well the oil is ready to insulate the live parts of a transformer. Instruments for measuring this parameter should be available in every electrical laboratory. In this article, we will discuss brief theoretical information about transformer oil breakdown voltage and how this voltage is determined.Read More

An oil moisture meter is an instrument that is used to determine the amount of water in industrial oils: transformer, lubricating, turbine, transmission, and other oils. In this article, we are going to discuss the most important matters related to oil wetness: how water gets into oil; in what forms water can be contained inRead More

In this article, we will discuss special aspects of transformer diagnostic evaluation and focus on online transformer monitoring systems. The presence of such systems makes transformer servicing easier, more convenient, and cost-effective. Approaches to classification of transformer status monitoring methods There exist various approaches to classification of transformer status monitoring methods which are determined byRead More

Power transformers are an important link in electrical power supply systems. They allow connecting the grid sections of different voltages and reducing the electricity losses during electricity transmission over great distances. A sudden failure of even one transformer causes the entire neighborhoods to remain without electricity. For this to happen as seldom as possible, maintenanceRead More

Transformer oil dielectric loss testing equipment is used both at the stage of checking the quality of oil before feeding it into the transformer and during the use of oil. In this article, we will discuss what is meant by the dielectric loss tangent, what parameters it depends on, what algorithm is applied to determineRead More

In this article, we will discuss one of the main methods for diagnostic evaluation of transformers — dissolved gas analysis of transformer oil. Hereinafter, we will tell you when it is advisable to use this method, what main techniques there exist to interpret the results thereof, and also speak about a new instrument in GlobeCoreRead More

The dielectric strength of transformer oil is one of the main parameters the value of which can be used to judge the quality and the current status of liquid transformer insulation. Physically, dielectric strength is the minimum electric field intensity at which electrical breakdown of a liquid dielectric occurs. Typically, the unit used to measureRead More

In this article, we will discuss what is meant by the dielectric strength of transformer oil, how dielectric strength measurement is taken, and what instruments are used for this purpose. Along with the dielectric loss tangent, dielectric strength is the main characteristic to describe the dielectric properties of insulating oil. Therefore, an interest in exploringRead More

Transformer oil tester is a device that measures one or more parameters of an oil in order to determine its current state. The market for such equipment is large, so in this article we will focus only on the basic parameters and solutions that GlobeCore offers to determine them. Also note that some types ofRead More

Most modern transformers use oil for insulation and cooling. The condition of oil defines transformer reliability and continuous power supply to the clients. Therefore, all procedures related to insulating fluid must be performed in strict accordance with the standards for quality and safety. In this article we will look at the process of  transformer oilRead More

Dielectric strength is an indicator used to assess insulation properties of transformer oil. It is very often equated with breakdown voltage, but their numerical values are not equal. Breakdown voltage is a minimum voltage applied to an insulation, resulting in its breaking down and becoming electrically conductive.  At the same time dielectric strength  is aRead More

Power transformers are the basis of the modern electric power industry. Their reliable operation guarantees the delivery of electricity to large industrial facilities and ordinary consumers. In this article we will consider the oil servicing – as an important component of the transformer insulation maintenance. We shall begin with functions. Oil in transformer isolates individualRead More