Transformer oil properties Transformer oil serves as a heat dissipater for heating parts of the transformer and as insulator of energized components. A significantly less value of BDV indicates the existence of a considerable amount of wetness and steering ions in the oil. It is essential to closely monitor the pour point of the transformer oil if the equipment is in service at places where the temperature usually below zero degrees. If the temperature of the oil decreases rapidly below the pour point the oil gets freeze and start cooling the parts of the transformer. The oil must be mobile to transfer the heat in a better manner from the core to the transformer radiators where heat is dissipated. It is a highly refined mineral oil that is stable at high temperatures and has excellent electrical insulating properties. © 2021 All Rights Reserved by Hering VPT. This product is used in many transformers, although some may also use the so-called synthetic oil. The main physical and chemical properties tested in Transformer Oil Testing Methods are the oil’s dielectric strength, dissipation factor, flashpoint, color, amount of solid particulate matter, water content, gas content and the oil’s acid number. These cookies will be stored in your browser only with your consent. The thermophysical and electrical properties of graphene–transformer oil nanofluid at three weight percentage concentrations (0.01%, 0.03%, and 0.05%) were experimentally studied. And very basics of Arabic, but he would like to improve these skills. Degeneration of transformer oil generates various types of gases. Learn what transformer oil is, how to TEST transformer oil – and the different types and properties. Organic oils of vegetative or animal origin are good insulators but tend to decompose giving rise to acidic by-products which attack the paper or cloth insulation around the conductors. Its unit is taken as ohm-cm at specific temperature. Most Important: Some spurious oil is being supplied by some spurious Trader in the Name of Transformer oil which looks like Transformer oil but actually this type of oil having flash point of about 100 deg C is very dangerous to public life and property. Over the years of service, the insulating oil which acts as dielectric to protect the core and windings of the transformer gets dissolved by acidic substances due to the various reactions it undergoes. Interfacial stress in the Transformer Oil – Naturally there exists a tension between the water and oil surface by which means the energy between the water content and oil interface can be measured and to be known as Dyne/cm or mill-Newton/meter. This flashpoint parameter is considered important as it analyses the character of the oil is getting fire. Transformer Oil Properties. Rusting of the iron materials by which the core is made also takes place. n-Heptane: Flammable. Today, non-toxic, stable silicone-based oils, or fluorinated hydrocarbons may be used where the expense of a fire-resistant liquid offsets additional building cost for a transformer vault. Polychlorinated biphenyls have properties that once favored their use as a dielectric coolant, though concerns over their environmental persistence led to a widespread ban on their use. Brands Dealt with : Veedol, elf, Valvoline, Servo, Castrol, Mobil,gulf, shell, timken petronas, ac delco, hp ,tvs ,elgi, mak ,kyros, Based in Madurai, Dealers of Lubricating Oils, Greases all around Southern States, How To Pick The Right Motor Oil For Your Car. A low resistivity reflects a high content of free ions and ion-forming particles in the insulating oil, and normally indicates a high concentration of conductive contaminates. For good transformer oil Total acidity should be low. Properties Mineral oil: 1.0: Flammable. Therefore deterioration in insulating property due to moisture or contamination may be more relevant. Dielectric Dissipation in Transformer Oil –. Used in some capacitors. These acidic substances formed throughout the operating condition of the equipment starts deteriorating the insulation property of both liquid and solid insulation materials. Read more. 3) It preserves the Core and the winding of the Transformer as the Transformer Core and winding remain immersed in the Oil. Different physical properties of Transformer Oil are Moisture Content: The amount of free and dissolved water present in the oil is its moisture content and is expressed in ppm … It can also be concluded simply that tanδ is indicative of the conducting nature of imperfect non-conductive materials like oil. The mineral oil is generally used in oil-based power transformers to prevent the development of arcing and corona discharge and to throw away the heat developed inside the transformer (i.e. 1) Transformer Oil provides the liquid insulation in between the windings and other conductive parts of Transformer. act as a coolant). Transformer Oil is an Oil which remains safe at high temperature. Flash Point Value of Transformer Oil – The temperature of the dielectric transformer oil whereon it starts giving out a vapor that forms a mixture with air which is highly flammable. PROPERTIES OF TRANSFORMER OIL Transformer oil is intended for insulation of energized parts of power transformers from deenergized elements, as well as for heat transfer to cooling systems. Organic oils of vegetative or animal origin are good insulators but tend to decompose giving rise to acidic by-products which attack the paper or cloth insulation around the conductors. This website uses cookies to improve your experience while you navigate through the website. Low Dissolved Water Content: To preserve electrical properties, especially where other contaminants may be present, and to avoid the precipitation of free water at extremely low temperatures. OilRead More 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. The paper insulation ( cellulose paper) in the equipment will also suitably affected by the water content accumulated in the oil. It will not only produce sludge, which may reduce the cooling efficiency of the transformer but can lead to tank corrosion by volatile acids. Richard-Stücklen-Strasse 19 act as a coolant). Dielectric dissipation factor can be termed by another names called loss factor is also accepted as the tan delta of the insulating transformer oil. Ernst-Schenk-Str.10 A comparative survey has been led on the two oils of basis, and Even though the basic functions of the oil used in transformers are (a) heat conduction and (b) electrical insulation, there are many other properties which make a particular oil eminently suitable. Oxidation in the transformer oil is due to reaction between the hydrocarbons present in the oil and air. The definitive specific value of resistance for transformer oil at a set value of 90oC is found as 35 × 1012 ohm-cm and at 27oC the value change as 1500 × 1012 ohm-cm. High-Voltage, High-Frequency dielectric properties of mineral transformer oil Mischa Nagel, Thomas Leibfried University of Karlsruhe - IEH, Engesserstr. This further results in the release of water from the paper also. The purpose of the insulating oil is to protect the transformer inner core and windings which are completely submerged down in the insulating oil. Moisture Analysis in Transformer Oil – the presence of moisture subjects or water subjects in transformer insulating oil is deeply problematic since it may dangerously affect the quality of dielectric properties in the oil which later accounts for the failure of the transformer. The acidity can be measured as oil present in one mg of KOH need to counterpoise the acid materials present in one gram of oil. This oil is used to protect the transformer core section and also the windings where the windings are completely submerged in the oil. Transformer Oil consists of organic compounds namely parraffins, naphthenes, aromatics and olefins. two naphtenic oils are considered, the Nynas Nytro 10 GBXS of 15 years old and a new Borak 22. Transformer oil; TRANSOL, is used as the base fluid for present application. This survey deals with the study of the main characteristics that are required for transformer oils, i.e. The Paraffin derived transformer mineral oil has a higher pour point as it has more wax content in it. Here voltage represents the instant voltage that occurs in the middle of phase and ground parts of the transformer. The representing unit of specific resistance is found as ohm-cm at a particular rundown temperature. Flammable. Watch Queue Queue. We use cookies to personalize and enhance your experience on our site. This oil is used to protect the transformer core section and also the windings where the windings are completely submerged in the oil. Definitive Resistance of Transformer Oil – The other demanding property of transformer oil is the specific resistance which can be determined by finding the direct resistance across the two adverse sides of one cm 3 slab of oil. In the initial years of service, the oil would be dry and clean and gives better BDV when compared with the oil after been in service for years which have accountable water content and other carrying impurities. But opting out of some of these cookies may have an effect on your browsing experience. The amount of Insulating mineral oil placed inside the transformer is commonly evaluated by a MOG (Magnetic Oil level Gauge). Transformer Oil will be obtained by fractional distillation and subsequent treatment of crude oil. It is used in oil-filled transformers, some types of high-voltage capacitors, fluorescent lamp ballasts, and some types of high-voltage switches and circuit breakers.Its functions are to insulate, suppress corona discharge and arcing, and to serve as a coolant. PROPERTIES OF TRANSFORMER OIL:Transformer core and windings are immersed in mineral oil called Transformer oil which acts as an insulator and also as a cooling material. Measures the electrical insulating properties of transformer oil under conditions comparable to those of the test. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Also, it is the responsibility of the enclosed transformer oil to avoid the reaction of oxygen with the paper insulation which is made of cellulose material and thereby extending the life span of the transformer. The viscosity index of Insulating Transformer Oil – The viscosity level of the dielectric transformer oil is the measure of the amount of resistance offered by the oil to its continued flow even in normal operating temperatures. Apr 10, 2019 - A SIMPLE explanation of Transformer Oil. It is basically the voltage value that can lead to the loss of the ability to withstand electrical stress. Different physical properties of Transformer Oil are. Water Content in Transformer Oil:- Water content impacts the life of a transformer from multiple points of view. Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent electrical insulating properties. Paraffin or Naphtha based oils are widely used as the insulating oil in a transformer. The work examines the study on waste transformer oil as a novel based alternate BD for compression engine. The transformer insulating oil will act as a blockade between the oxygen available in the atmosphere and the solid insulation (cellulose paper) to prevent their immediate contact and thereby keep down the oxidation reaction. Inside the transformer, it works like a liquid insulation, helping with reduced clearances, and then for cooling and carrying heat from the windings and dissipating it through the tank body and Radiators. Experiments conducted to find viscosity, surface tension, density, specific resistance, electrical conductivity, and dielectric dissipation at various temperatures ranging from 20 °C to 90 °C. BDV is a primary factor of transformer oil, as it indicates the health of oil abruptly and it can be estimated at the onsite eventually without much effort. Transformer Oil: Physical characteristics. Direct measurement of these properties is not practical for in-service transformers. Our customer support team is here to answer your questions. It is desirable to choose a transformer oil that has excellent pour point. Presence of oil is harmful since it adversely affects the electrical characteristics of the oil and accelerates the deterioration of the insulating paper. It must therefore have high dielectric strength, thermal conductivity, and chemical stability, and must keep these properties when held at high temperatures for extended periods. – The dielectric capability of the transformer oil (dielectric strength of transformer oil) depends on the breakdown strength (BDV) of transformer oil. The other demanding property of transformer oil is the specific resistance which can be determined by finding the direct resistance across the two adverse sides of one cm3 slab of oil. Transformer oil's primary functions are to insulate and cool a transformer. So measurement of the total acidity is the tool to determine the capability of oil for non formation of For this reason, transformer oil must have some properties like thermal conductivity, very high dielectric strength and chemical stability. The pour point of Paraffin-based oil is high when compared with Naphtha based transformer oil, but it is suggested to use paraffin oil in hot weather places. For quantitative evaluation of transformer oil color it is viewed in through light, then compared to digital standards. Inhibited oils contain additives which slow down the deterioration of properties under heat and moisture and hence the degradation of 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. Fire Resistant. Next, when the atmospheric oxygen reacts with the transformer oil, acid compounds get accumulated in it which reaches the saturation limit of water in the oil. Ask us anything! For this purpose different properties of waste transformer oil were determined. Physico-Chemical Properties of Power Transformer Oil Mixtures H. Moulai 1, I. Khelfane2, A. Yahiat2, T. Toudja , A. Nacer , M. M. Zemirli1, F. Doussas1 1 University of Sciences and Technology Houari Boumediene; Laboratory of Electrical and Industrial Systems; FEI, BP 32, Bab Ezzouar, Algiers, Algeria. In this work, thermal conductivity was measured from 253 K to 363 K by single transient hot-wire technique. The transformer insulating oil can be analysed to determine the information regarding the health status of the transformer and therefore It is named as the information carrier. The cellulose paper used as solid insulation for protecting the core and windings of the transformer absorbs the water in the oil and losses it’s insulating property to a considerable extent and reduces the life span of the transformer. Knowing is half the battle, of course, so let’s dive in and talk about what this oil does and how it’s made and graded. The amount of free and dissolved water present in the oil is its moisture content and is expressed in ppm (parts per million by weight, mg/kg). This highly refined mineral oil has excellent electrical insulating property in comparison with other mineral oils. 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