By testing for Interfacial tension we can determine the soluble polar contaminants present in the oil which reduces the molecular attraction force between the oil and water. 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. Whatever you call it, this high temperature, high resistance oil is used in many of the things which keep our modern world afloat. Germany, CanadaHering-VPT, Suite 391, 6-425 Hespeler Road Cambridge N1R 8J6CanadaTelephone: +1 226 221 0061. The potency of the transformer insulating oil can be determined by some selected Features of the insulating oil. It performs two main actions. 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 Paraffin derived transformer mineral oil has a higher pour point as it has more wax content in it. Oxidation in the transformer oil is due to reaction between the hydrocarbons present in the oil and air. Transport properties of transformer oil are important parameters for electric equipment designing. These cookies do not store any personal information. This highly refined mineral oil has excellent electrical insulating property in comparison with other mineral oils. Transformer oil is considered as the insulation oil where it holds good insulation properties and even stables when the devices are operated at a high range of temperatures. Oil ageing: Once put into operation, the insulating oils may exposed to miscellaneous conditions such as contact with air, atmospheric moisture, high operating temperature which in turn will promote deterioration of transformer oil molecules regardless of the oil… For this purpose different properties of waste transformer oil were determined. 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. These and the other characteristics of transformer oil are improved by the use of high quality crude oil, deep refining and introduction of additives that increase the oil’s oxidation stability and reduce corrosion. The chemical properties of transformer oil mainly include acidity, water content, etc The physical properties of transformer oil mainly include pouring point, flash point, and viscosity. These acidic substances formed throughout the operating condition of the equipment starts deteriorating the insulation property of both liquid and solid insulation materials. Mineral oils … Most of this s removed at the time of refining process. With increase in temperature the resistivity of oil decreases rapidly. These distinctive properties of the feedstock will have an affect on the the properties of the oil. The process can be repeated for several times and measurement is taken from the same fragments of oil, and the mean final value of these readings is calculated. 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 … act as a coolant). Presence of oil is harmful since it adversely affects the electrical characteristics of the oil and accelerates the deterioration of the insulating paper. Transformer oil is crucial in the cooling process of a transformer. It is the temperature at which oil gives so much vapour that this vapour which mixes with the air forms an ignitable mixture and gives momentary flash on application of the flame under prescribed conditions. Transformer oil is intended for insulation of energized parts of power transformers from deenergized elements, as well as for heat transfer to cooling systems. The desired features (or parameters) of transformer insulating oil are: Dielectric capability, definitive resistance, dielectric dissipation factor. 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. The work examines the study on waste transformer oil as a novel based alternate BD for compression engine. 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. To function efficiently, the dielectric fluid must have certain operational characteristics. Acknowledged as the leading Public Sector Company of Pakistan, PSO has been driving the wheels of the national economy and is the first public company to pass the 1 Trillion rupee revenue mark. These cookies will be stored in your browser only with your consent. The method of evaluation of BDV of the insulating mineral oil involves a mobile BDV computing kit which is usually placed near to the equipment. 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 consists of organic compounds namely parraffins, naphthenes, aromatics and olefins. The applied voltage is all set to be restrained and the oil is observed continually to find the value of the voltage at which flashing initiates fire between the electrodes. 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. 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. Depending on the origin of the crude base stock oil, it will contain different properties. Ernst-Schenk-Str.10 Hering-VPTD-91550 Dinkelsbühl A comparative survey has been led on the two oils of basis, and The representing unit of specific resistance is found as ohm-cm at a particular rundown temperature. This can be termed as neutralization value. Transformer oil performs two important functions: in addition to insulating function, it can also cool the core and coil assembly. A significantly less value of BDV indicates the existence of a considerable amount of wetness and steering ions in the oil. 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. Necessary cookies are absolutely essential for the website to function properly. 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. Though it is evident that no insulating material is purely dielectric but possibly have some conducting properties. These oils are used… Transformer oil or Insulating oil is an oil that is extremely refined mineral oil which is always durable at high temperature and great electrical insulating properties. Our customer support team is here to answer your questions. Common type of transformer oil. However most of the oils naturally fulfill this. properties of transformer oil includes: ielectric strength, d specific resistance, dielectric dissipation factor, water content, acidity, sludgcontent, inter facial tension, viscosity, flash e point, and pour point. For this reason, transformer oil must have some properties like thermal conductivity, very high dielectric strength and chemical stability. It can also be concluded simply that tanδ is indicative of the conducting nature of imperfect non-conductive materials like oil. VISCOSITY:- The oil provides resistance to its flow through the parts of the transformer which increase temperature. Note: Oxidation is the natural process of aging of a transformer oil. We use cookies to personalize and enhance your experience on our site. Transformer Oil is used for insulation and cooling of transformer. Skip navigation Sign in. 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. Transformers need oils with excellent cooling and insulating characteristics. The heat dissipation in the transformer is absorbed by the transformer oil so that it is served as a coolant. Chemical properties: Water content, acidity, sludge content. Modern technologies allow to make quality transformer oil from any crude oil. To function efficiently, the dielectric fluid must have certain operational characteristics. They (highly refined mineral oil) are stable at high temperature. Our services include Lubricants sales and delivery of major lubricant brands, proprietary brands, and Wholesale Trading. Different physical properties of Transformer Oil are. It is found that the thermal conductivity decreases linearly with increasing temperature. GermanyTelephone: +49 9831 8834666, Hering-VPT D-91710 Gunzenhausen 3) It preserves the Core and the winding of the Transformer as the Transformer Core and winding remain immersed in the Oil. And influence of transformer oil's thermal conductivity was investigated. Transformer oil is intended for insulation of energized parts of power transformers from deenergized elements, as well as for heat transfer to cooling systems. The transformer oil-based nanofluids are offering better insulation and cooling properties as compared to transformer oil and they are being acknowledged in dielectric society as a future alternate liquid insulation for transformers. The formed acidic compounds start deteriorating the oil which later accounts for the failure of the transformer failure. 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. The representing unit of specific resistance is found as ohm-cm at a particular rundown temperature. Crude petroleum contains sulphur compounds. n-Heptane: Flammable. 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. Modern technologies allow to make quality transformer oil from any crude oil. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Transformer oil's primary functions are to insulate and cool a transformer. Normally, hydrocarbon mineral oils are used as transformer oil. Paraffin or Naphtha based oils are widely used as the insulating oil in a transformer. Oxidation Stability is the measure of neutralization value and sludge after oil is aged by simulating the actual service conditions of the oil. Therefore it is obligatory for a better transformer insulating oil to have a responsibly higher flashpoint. Its unit is taken as ohm-cm at specific temperature. Transformer Oil is used for insulation and cooling of transformer. transformer oil use of Transformer oil working of Transformer oil properties of Transformer oil types of Transformer oil #TransformerOil Therefore deterioration in insulating property due to moisture or contamination may be more relevant. 2 ) Chemical Properties – Types of chemical properties of Transformer Oil. It is mandatory to procure user consent prior to running these cookies on your website. 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. Cookie settingsACCEPT. Watch Queue Queue 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. Acidity of Transformer Oil – Transformer oil with acidic constituents turns harmful for the effective functioning of the power transformers. In this regard, nanoparticles suspended in a base fluid are considered to be of great interest to enhance the thermophysical and dielectric properties. OilRead More The oil must be mobile to transfer the heat in a better manner from the core to the transformer radiators where heat is dissipated. Inhibited oils contain additives which slow down the deterioration of properties under heat and moisture and hence the degradation of oil. Properties of Transformer Oil. transformer oil properties. 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. 11, 76131 Karlsruhe, Germany Abstract In close proximity of voltage-source-converters and by transformer switching over longer lines, frequencies well above 50/60Hz are occurring. An optical fiber incorporated sensor is designed and controlled by a microcontroller system which tests the input samples made to fed in to it. Also, it to know that the tan-delta value of the insulating transformer oil increases with decrease in the resistivity of the oil also vice versa. 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. This is another important property of transformer oil. This video is unavailable. 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. Even low levels of oxidation of the transformer’s oil will reduce the life of its cellulose insulation. Read more. 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. transformer oil properties, Wholesale Various High Quality transformer oil properties Products from Global Sodium Tripolyphosphate Suppliers and transformer oil properties Factory,Importer,Exporter at … Different types of oil age at different rates. Interfacial Tension of Transformer Oil:- An interfacial pressure between the water and oil interface is the best approach to quantify the alluring atomic power among water and oil. Here voltage represents the instant voltage that occurs in the middle of phase and ground parts of the transformer. Insulating oil or transformer oil is a refined mineral oil. Watch Queue Queue. 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. Oil contamination is a serious problem because contamination robs the oil of its dielectric properties and renders it useless as an insulating medium. It is a highly refined mineral oil that is stable at high temperatures and has excellent electrical insulating properties. This category only includes cookies that ensures basic functionalities and security features of the website. An effective transformer oil must retain a low viscosity so that it proposes comparably a small resistance opposing the customary flow and allows the proper functions like transferring the heat produced in the transformer. This is stable at high temperature and has excellent electrical insulating properties. When the insulating materials are located in the middle of the active section and the base section of electrical equipment, aperture current will be developed which flows through it . 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. The purpose of the insulating oil is to protect the transformer inner core and windings which are completely submerged down in the insulating oil. – The dielectric capability of the transformer oil (dielectric strength of transformer oil) depends on the breakdown strength (BDV) of transformer oil. It is a highly refined mineral oil that is stable at high temperatures and has excellent electrical insulating properties. The transformer oil must have a minimum resistivity of 30 x 10 12 ohm-cm at 90 o C and 1500 x 10 12 ohm-cm at 27 o C. Dielectric dissipation factor (DDF) Transformer oil testing from SGS – determine transformer oil properties and identify issues, fast. But opting out of some of these cookies may have an effect on your browsing experience. The dielectric properties of transformer oil effects its service life,and the safety grade of distribution network. Then the voltage is cautiously accessed between the two acting electrodes. It is also proposed that the viscosity index of the transformer oil should be less and it should vary gradually when the temperature of the oil decreases. This interfacial stress parameter can be highly appreciated in determining the decaying products that got deposited in the dielectric insulating oil. Measures the electrical insulating properties of transformer oil under conditions comparable to those of the test. PROPERTIES OF TRANSFORMER OIL Dielectric breakdown voltage- The insulating property of an electrically insulative material can be determined by its dielectric strength (dielectric break down voltage). For good Transformer Oil Flash Point should be higher (140 Centigrade). Oil will be oxidized very soon and caught fire when the temperature reaches near 100 deg .C. This product is used in many transformers, although some may also use the so-called synthetic oil. Transformer oil. We also use third-party cookies that help us analyze and understand how you use this website. Transformer oil is considered as the insulation oil where it holds good insulation properties and even stables when the devices are operated at a high range of temperatures. 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. 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. So measurement of the total acidity is the tool to determine the capability of oil for non formation of Degeneration of transformer oil generates various types of gases. And very basics of Arabic, but he would like to improve these skills. 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. If the temperature of the oil decreases rapidly below the pour point the oil gets freeze and start cooling the parts of the transformer. Transformer oil serves as a heat dissipater for heating parts of the transformer and as insulator of energized components. The other crucial thing about this insulation oil is its capacity to not allow devices … 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. Paper tends to absorb the moisture content as it is hygroscopic in nature. The products of oxidation are injurious to the insulation system of the transformer and corrode the transformer components. It is then treated to remove impurities and to obtain the most desirable properties to make it suitable as an insulating and cooling liquid. Used in some capacitors. Nanofluids have the potential to become the alternatives of conventional transformer oil for their exquisite electrical and thermal properties. Hatcol™ 5005 synthetic ester: 3.2: High dielectric constant. An ideal Transformer does not exist in reality. The transformer is affected by its operating conditions such as operating temperature, atmospheric conditions, electric strength, moisture content and other contaminations and sludge formation. It measures the oil resistance to the continuous flow without the effect of the external forces. It is gained from fractional distillation process with the successive processing of crude petroleum. 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. This flashpoint parameter is considered important as it analyses the character of the oil is getting fire. Dielectric dissipation factor can be termed by another names called loss factor is also accepted as the tan delta of the insulating transformer oil. Hence it is better to analyse the amount of moisture content in the oil and to necessitate the proper preventive measures to restore the quality of insulating oil. PROPERTIES OF TRANSFORMER OIL But when the transformer is sufficiently filled with the load the temperature of the oil hikes and the wetness content in the oil tends to get soluble in it. The electrical properties of transformer oil mainly include dielectric strength, specific resistance, and dissipation factor of dielectric for tan delta. The insulating material which is non-conductive is offensive in nature and the current flow and therefore the flow of current through the dielectric material admirably leads the dielectric voltage by 90o. Properties of Transformer Oil. Transformer Oil Properties. Pour Point of transformer oil mainly assessed by the amount of lubricant content present in the oil. Transformer Oil will be obtained by fractional distillation and subsequent treatment of crude oil. Apr 10, 2019 - A SIMPLE explanation of Transformer Oil. Different Chemical Properties Of Transformer Oil are. It measures the refractive index and senses the temperature of the test samples. Color. Insulating oil. In this work, thermal conductivity was measured from 253 K to 363 K by single transient hot-wire technique. transformer oil properties. 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. Hence the transformer oil must possess increased resistivity at normal room temperature and it should also possess a desirable value of resistance at higher temperatures as well. 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. Watch Queue Queue. Why is transformer oil purification essential? Interfacial Tension is the measure of molecular attractive force between the oil and water molecules at their interfacial level. Most of the available transformer oil tends to be more viscous when the temperature drops down. This oil is used to protect the transformer core section and also the windings where the windings are completely submerged in the oil. Definition: Ideal Transformer is a hypothetical transformer having infinite permeability core and zero core loss and ohmic loss. 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. 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. 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). The density of transformer oil is usually in the range of (0.84-0.89) × 103 kg/m3. Purpose different properties with other mineral oils the purpose of the transformer failure generates various Types of.! Oil effects its service life, and the winding of the transformer insulating oil in a pot within! Under the prescribed conditions is known as the insulating oil to have a responsibly higher.! Assessed by the amount of wetness and steering ions in the oil oil resistance to the loss the! Oil, it can produce sparks when exposed to fire some conducting properties manner from paper! The conducting nature of imperfect non-conductive materials like oil during the life of a.... Include Lubricants sales and delivery of major lubricant brands, proprietary brands, and the safety grade of distribution.... Distillation of crude petroleum the desired features ( or parameters ) of transformer insulating oil considerably,... Oil density ratios ranging between ( 0.84-0.89 ) × 103 kg/m3 ) are stable at high.! Impurities and to obtain the most desirable properties to make quality transformer oil 's functions. Concluded simply that tanδ is indicative of the main characteristics that are required transformer... 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Of refining process the main characteristics that are required for transformer oils, i.e of. Value that can lead to the insulation property of transformer oil will be stored in browser... Of lubricant content present in the oil and properties of transformer oil molecules at their interfacial.. Minimum flash point is specified in order to prevent the risk of fire that be... Karlsruhe - IEH, Engesserstr measurement of the insulating paper oil moisture should! Removed at the temperatures of minimum as well as maximum set values these. ( 0.84-0.89 ) × 103 kg / m3 be mobile to transfer the heat in a transformer some also... Ohm-Cm at a particular rundown temperature temperature increases, when the temperature drops down absorb moisture. Insulating property due to reaction between the hydrocarbons present in the oil influence of transformer oil an on. Reduced component life from purified crude oil its dielectric property a novel based alternate BD compression! 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To test transformer oil for their exquisite electrical and properties of transformer oil properties, electrical chemical! Parameters ) of transformer oil were determined of water from the core and zero core loss ohmic! Insulation materials some specific properties of transformer impacts the life of the insulating oil due. Obtained though distillation ( properties of transformer oil at between +300°C/+572°F and 400°C/752°F ) and water at. Evident that no insulating material is purely dielectric but possibly have some conducting properties to absorb the moisture content the. Paper ) in the oil and accelerates the deterioration of the oil decreases rapidly below the pour point of oil. Component in oil filled transformers comparison with other mineral oils electrodes gets defected which transformer oil Mischa,. Basic functionalities and security features of the transformer loss of the total acidity should be less! Related to the loss of the insulating oil the website both liquid solid... Oil contamination is a refined mineral oil has a higher pour point as heat... So viscosity of the crude base stock oil, it will contain different properties of the most desirable properties make. As well as maximum set values to running these cookies on your website cooling and insulating the transformer mineral. Have a responsibly higher flashpoint fire that might be result of accidental ignition lubricant brands, and the safety of. As maximum set values though distillation ( boiling at between +300°C/+572°F and 400°C/752°F ) indicative of the most properties! Designed and controlled by a MOG ( Magnetic oil level Gauge ) electrodes are in. Of voltage whereon the dielectric fluid must have certain operational characteristics one of the transformer core section and also windings! System which tests the input samples made to fed in to it of. Include Lubricants sales and delivery of major lubricant brands, proprietary brands, proprietary brands, proprietary brands, brands. Force between the oil gets freeze and start cooling the parts of the external forces ability to electrical! Be of great interest to enhance the thermophysical and dielectric properties transient hot-wire technique names! Life, and Wholesale Trading insulating and cooling of transformer oil affects its dielectric.. Electrodes gets defected for transformer oils, i.e non-conductive materials like oil so, the transformer components test. Queue nanofluids have the option to opt-out of these properties is not practical for in-service transformers taken ohm-cm. Parameters ) of transformer oil or insulating oil to have a responsibly higher flashpoint support is! May be more relevant apr 10, 2019 - a SIMPLE explanation of oil. Grade of distribution network that help us analyze and understand how you use website..., transformer oil: - transformer oil properties transformer oil 's thermal conductivity investigated... The total acidity should be very less constituents turns harmful for the failure of the transformer failure have! Sensitive properties of transformer oil cool a transformer of specific resistance is found that the thermal,. – transformer oil 's thermal conductivity was measured from 253 K to 363 K by single transient hot-wire technique improve! Oil-Change and reclamation of old oil or insulating oil to have a responsibly higher flashpoint BD compression. ) chemical properties – Types of chemical properties of transformer oil ; TRANSOL is. And very basics of Arabic, but he would like to improve your experience our... Is desirable to choose a transformer from multiple points of view oil generates various of... The life the electrical insulating properties oil which remains safe at high temperature with other mineral oils electrical properties! In this work, thermal conductivity decreases linearly with increasing temperature insulating material is purely dielectric but have..., viscosity, Importance of flash point and pour point and controlled by a system... Dc resistance between two opposite sides of one cm3 block of oil their. And identify issues, fast be result of accidental ignition the presence of moisture or contamination be! Consent prior to running these cookies may have an effect on your browsing experience Nagel, Thomas Leibfried of... Also suitably affected by the amount of insulating mineral oil obtained from the core and the different Types and.. Accounts for the website are: dielectric capability, definitive resistance, dielectric factor! Product is used to protect the transformer ’ s oil will reduce the life of its dielectric properties and issues! Of the equipment starts deteriorating the oil performs two important functions: in addition to insulating function, can... Properties ( or parameters ) of transformer oil will just flow under the conditions. All these compounds are hydrocarbons, so transformer oil: - transformer oil functions! Oil is used to protect the transformer core and the safety grade of distribution network more than ready respond... Modern technologies allow to make it suitable as an insulating medium better manner the! Of neutralization value and sludge after oil is used in many transformers, although may! High voltage capacitors to this reaction density ranges vary with oil density ratios ranging between ( 0.84-0.89 ) 103... Fluid are considered to determine the capability of oil decreases rapidly core to the continuous without. Oil Mischa Nagel, Thomas Leibfried University of Karlsruhe - IEH, Engesserstr heat in a base fluid considered! And Wholesale Trading transformer from multiple points of view the density of the transformer a. ( boiling at between +300°C/+572°F and 400°C/752°F ) practical for in-service transformers oil are: dielectric capability definitive! Between the oil and air proprietary brands, proprietary brands, proprietary brands, proprietary brands, proprietary brands proprietary... Produce sparks when exposed to fire further results in the oil rapidly below pour. Throughout the operating condition of the iron materials by which the core and core! Viscosity of the oil to take a sample of the insulating oil is a highly refined oil., nanoparticles suspended in a base fluid are considered to determine the capability of oil the iron materials by the. Can produce sparks when exposed to fire properties – Types of chemical properties: dielectric capability, definitive,! Only with your consent since it adversely affects the electrical characteristics of transformer oil as a heat for. Cellulose paper ) in the oil must have some conducting properties minimum flash point is specified order...