The performance properties of transformer oil depend heavily on the quality and parameters of the raw material. This oil absorbs the moisture within nature very quickly. Transformer oil comes from purified crude oil and is obtained though distillation (boiling at between +300°C/+572°F and 400°C/752°F). Developed in-house by Calumet’s R&D group, CALTRAN transformer oils have excellent dielectric properties, high thermal stability and good resistance to oxidation. "The Environmental technology verification program", U.S. Environmental Protection Agency, Washington, DC, VS-R-02-02, June 2002. Insulating oil. Furan testing - once every 2 years, subject to the transformer being in operation for min 5 years. Beheshti et al. McShane C.P. Pentaerythritol tetra fatty acid natural and synthetic esters are more expensive than mineral oil. Transformer Oil Usage precautions Avoid spilling. The oil’s “Dissipation Factor” is responsible for the oil’s dielectric properties and protects the transformer’s electrical system from possible short circuits. The resulting breakdown voltage is calculated as mean value of the individual measurements. Immediately after ignition of the arc, the test voltage is switched off automatically. Oil also dissolves gases generated by oil degradation, moisture and gas from cellulose insulation, deterioration, and gases and moisture from exposure to … CALTRAN transformer oils fully meet ASTM D3487 specifications for Type I and Type II mineral insulating oil in electrical apparatus. Besides, few researches focused on the rheology of hybrid carbon-based nanofluids. Color. And very basics of Arabic, but he would like to improve these skills. Typical motor oil that most people think of, is not the type of oil in a transformer. It is therefore necessary to check the quality of the oil periodically and take corrective steps to avoid major break downs in the transformer. An Insulating Oil must have the following properties: 1) Excellent dielectric properties resulting in … A new oil , for example has a OQIN of 1500. So we were keen to use a very good oil. Transformer oil serves as a heat dissipater for heating parts of the transformer and as insulator of energized components. Synthetic transformer oil like chlorinated di-phenyl has excellent properties like chemical stability, non-oxidizing, good dielectric strength, moisture repellent, reduced risk due fire and explosion. Transformer oil is a liquid that is stable at high temperatures and has excellent electrical insulating properties. Better insulation values will be there between windings due to high resistivity. Suggested intervals for these test are: Some transformer oil tests can be carried out in the field, using portable test apparatus. Mineral oils are suitable from the point of electrical properties but tend to form sludge. 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. Electrical and thermal stress or chemical contamination can cause failures and reduced component life. The two can then be separated via a centrifuge. PROPERTIES OF TRANSFORMER OIL Transformer Oil forms a very significant part of the transformer insulation system and has the important functions of acting as an electrical insulation as well as coolant to dissipate heat losses. The root mean square value of the test voltage is measured at the very instant of the breakdown and is reported as the breakdown voltage. It provides a rough indication of the total aromatic content, and relates to the solvency of the oil for In few words, the viscosity of transformer oil can be said that viscosity is the obstruction of stream, in typical condition. Transformer Oil The ultra low sulphur and wax free Naphthenic Oils/Paraffinic oils along with low Viscosity Index ensure excellent cooling characteristics, high solvency and low corrosivity. PCB removal systems use an alkali dispersion to strip the chlorine atoms from the other molecules in a chemical reaction. The primary function of this is as a coolant. The boiling point of this oil is approximately 425 °C. For quantitative evaluation of transformer oil color it is viewed in through light, then compared to digital standards. The test voltage is continuously increased up to the breakdown voltage with a constant slew rate of e.g. 0093-9994/01, 2001 IEEE. Despite the apparent superiority of naphtha-based oil, paraffin oil remains the most commonly used type of oil in transformers worldwide. Oxidation products are insoluble within the oil. Polychlorinated biphenyls are a man-made substance first synthesized over a century ago and found to have desirable properties that led to their widespread use. Transformer oil properties mainly include the following. It includes high dielectric strength to resist with a high voltage. In addition there is contamination caused by chemical interactions with windings and other solid insulation, catalyzed by high operating temperature. This value is known as the Oil Quality Index(OQIN) or Myers Index Number(MIN). Its reliability sets it apart from competing products, and its various properties demonstrate why MIDEL 7131 is a better option than mineral oil. 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. Tests can be divided into: The details of conducting these tests are available in standards released by IEC, ASTM, IS, BS, and testing can be done by any of the methods. The pour point of this oil is low as compared with the paraffinic type due to less wax content. Chemical composition of oil is quite complex. Transformer oil is used in oil-filled electrical power transformers to insulate, stop arcing and corona discharge, and to dissipate the heat of the transformer (i.e. So this kind of oil acts as a coolant protects the windings and core of the transformer because these two are submerged within the oil. Unfortunately, they are also toxic, bioaccumulative, not at all biodegradable, and difficult to dispose of safely. [12] Oil in large transformers and electrical apparatus is periodically tested for its electrical and chemical properties, to make sure it is suitable for further use. In chapter three and four, an extended discussion on the transformer oil properties is made, taking into consideration the eleven most important ones. Historically, naphthenic oils have provided generally acceptable properties as transformer oils. Protection from stream of transformer oil implies obstacle of convection course of oil inside the transformer. used in the machine, protect the machine parts from rust and corrosion, [citation needed], One method that can be used to reclaim PCB contaminated transformer oil is the application of a PCB removal system, also called a PCB dechlorination system. The mineral-based oil like transformer oil is frequently used in different types of transformers for its dielectric strength as well as electrical properties. Silicone or fluorocarbon-based oils, which are even less flammable, are also used, but they are more expensive than esters, and less biodegradable. So a material like a silica gel filled breather is used within the transformer so that external moisture in the breathing is trapped within silica gel. Transformer Oil is an Oil which remains safe at high temperature. [8] Polychlorinated biphenyls (PCBs) were formerly used as transformer oil, since they have high dielectric strength and are not flammable. wax. Early testing will set up a bottom line for contrast & yearly testing will design any changes inside the transformer. [10], PCBs and mineral oil are miscible in all proportions, and sometimes the same equipment (drums, pumps, hoses, and so on) was used for either type of liquid, so PCB contamination of transformer oil continues to be a concern. In chapter three and four, an extended discussion on the transformer oil properties is made, taking into consideration the eleven most important ones. 2780 Waterfront Pkwy. Transformer oil is a liquid that is stable at high temperatures and has excellent electrical insulating properties. At high temperature, this is stable and it is used in electrical power transformers to prevent arcing, dissolve the heat of the transformer. Transformer oil is most often based on mineral oil, but alternative formulations with better engineering or environmental properties are growing in popularity. It makes a suitable stage of insulation along with the insulating materials which are used in the coils as well as conductors. Properties behind eff ective Transformer Oil Cooling 1 S11 Hendrik Cosemans, General Manager Nynas Dubai As a Belgian national, where 3 offi cial languages are part of the national struc-ture, Hendrik is adding English and Spanish to his language portfolio. Transformer oil (also known as insulating oil) is a special oil with good electrical insulation properties and is stable at high temperatures. As transformers get larger than around 1 MVA and above 33kV it becomes more challenging to achieve a hermetically sealed design (due to thermal expansion and contraction). Less and nonflammable liquid-insulated transformers, approval standard class Number 3990, Factory Mutual Research Corporation, 1997. Transformer oils perform at least four functions for the transformer. Typical specifications are: flash point 140 °C or greater, pour point −40 °C or lower, dielectric breakdown voltage 28 kV (RMS) or greater. Read more. The following comments and interpretations, based on both technical understanding as well as empirical knowledge, emphasize those properties that are functionally important to transformer oils: Aniline Point (D611) The aniline point is the temperature at which a mixture of aniline and oil separates. The boiling point of this kind of oil about 530 °C. 7.2. Testing of transformer oil is mandatory in yearly once for its maintenance. The pour point of this oil is high as compared with the naphthenic type due to high wax content. Transformer oil testing from SGS – determine transformer oil properties and identify issues, fast. Insulating Oils or Transformer Oils are mineral electrical insulating oils processed from fractional distillation and treatment of crude petroleum. A new oil , for example has a OQIN of 1500. There are two types of transformer oil that include the following. knowledge, emphasize those properties that are functionally important to transformer oils: Aniline Point (D611) The aniline point is the temperature at which a mixture of aniline and oil separates. The main functions of transformer oil are coolant and insulator. This value is known as the Oil Quality Index(OQIN) or Myers Index Number(MIN). 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