Otherwise the transformers will not be able to be properly cooled, and switches can break arc. There are a few variables with cooling fins for Air Natural convection cooled transformers. Today, many transformers use “Inhibited Oils.”  An inhibited oil contains anti-oxidant additives that help to slow and inhibit the oxidation process. A good number of these properties are experimented upon by using the breakdown The exact density of transformer oil depends upon the manufacturer but, expressed in SI units, is typically a little less than 900 kg/m3 at 20oC. Oil has a complex structure of hydrocarbon molecules with an average weight of 220-340 AU, and contains the following main components . Read More. The ratio of weight of oil to kVA rating follows a power series. Transformer oils primary insulate and cools transformers, but can also be found in other electrical equipment, such as high voltage switches and circuit breakers. Depending on the origin of the crude base stock oil, it will contain different properties. Kinematic viscosity for most oils at +20°C/+68°F is 28-30 × 10-6 m2 / s . As the name suggests, the oil sample is compared with a previous sample from the same transformer and is checked for darkening of oil. Also, it should be free from any suspended matters. GlobeCore. For example, if the specific gravity of water is 1.0 and oil is 0.89, the oil will float on top of the water. When did sir Edmund barton get the title sir and how? Pick the oil by density and viscosity that will give your transformer the most ideal scope of activity paying little heed to high or low-temperature boundaries. But basically, this number can not exceed 900 kg/m3 at 20°C. Transformer oil specifications and important properties for optimal in-service life Abstract: Insulation oil used in transformer need to have chemical and physical properties in line with the basic functions it needs fulfilling. Mineral-oil based transformer oil is composed of the materials listed in the Table below. Some transformers, particularly indoor units, are filled with a synthetic fluid, such as silicon, R-temp, or Askarel (PCB fluid). Transformer oil inhibited with Ionol usually creates a pronounced induction period which is good for the service life of the oil. Copyright © 2021 Multiply Media, LLC. Beneficial effects of the additives  The more effective the anti-oxidant additive is, the longer the oxidation induction period in the oil will be. These have a pronounced affect on the function of the oil. to Transformer oils (insulating oils) to Properties of fluids. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful. The exact density of transformer oil depends upon the manufacturer but, expressed in SI units, is typically a little less than 900 kg/m3 at 20oC. Density: – The density of healthy transformer oil should be 0.89 gram per cubic centimeter at the temperature of 29.5 centigrade. Transformer oil's primary functions are to insulate and cool a transformer. That is why specific resistance or resistivity of transformer oil should get measured at 27 o C as well as 90 o C. Minimum standard specific resistance of transformer oil at 90 o C is 35 × 10 12 ohm–cm and at 27 o C it is 1500 × 10 12 ohm–cm. Who is the longest reigning WWE Champion of all time? Appearance: – The color of the oil must be clear and transparent. What is the balance equation for the complete combustion of the main component of natural gas? What did women and children do at San Jose? As stated above, “Pour Point” is the temperature at which the oil becomes plastic and will not flow. Localised grades. Super grades. Table 12.2 shows that all heavy oil and bitumen produced in China has density >0.9 g/cm 3 at 20°C. Usually this parameters is not regulated and is within 0.856 to 0.886. Density of Transformer Oil at 29.5oC is 0.89g/cm3. Transformer oil, a type of insulating and cooling oil used in transformers and other electrical equipment, needs to be tested periodically to ensure that it is still fit for purpose. Fresh oil should solidify at a temperature no greater than a pour point temperature of -45°C/-49°F. Operating oil is allowed a number of deviations from the curing temperature depending on whether the oil is used in a transformer or a switch, and whether it or operates indoors or outdoors. 1.2 Scope. TRANSFORMER OIL PURCHASE SPECIFICATIONS (Developed Under the Auspices of the Doble Oil Committee) March, 2017 COMPOSITION This specifications covers new insulating oil for general applications for liquid-filled electrical equipment, which are manufactured from mineral crude, which may be either naphthenic, which has a very low naturally occurring n-paraffin (wax) content, or paraffinic, … 3 . Extreme low temperature pour point (-45°C -49°F and below) is also an important quality found in the better brands of insulating oil. The J&P Transformer Book states that 'a limit of 895 kg/m3 at 20oC ensures that the temperature (of the oil) must fall to -20oC before the density of the oil would exceed that of ice' -thus ensuring that if ice forms, then it would remain at the bottom of the tank. Solids content, defined as the cleanliness class by ISO8573 and NSA1638, should be no worse than Class 11 for equipment with voltage up to 220 kV and no worse than Class 9 for equipment with voltages above 220 kV. Despite the variables that determine the density of the oil, the density number should not exceed 900 kg / m3 at a predetermined temperature of +20°C/+68°F. Density(K G/dm³) @20°C ISO 3675 0.89 Max 3. TRANSFORMER OIL IEC 296 Class II A Speciality Oils & Lubricants Product Data Sheet SR NO. A representative sample of the oil shall be examined in 100 mm thick layer at 27°C The oil shall be clear and transparent & free from suspended matter or sediment Transparent, clear and light: Density @ 29.5°C: IS : 1448 (P-16)-0.89: 0.840 g/cm 3: Kinematic Viscosity @ 27°C, cSt: IS : 1448 (P-25)-27: 12.4 cSt If the oil is heated, its specific weight decreases, and … Oil has many uses; it heats homes and businesses and fuels trucks, ships, and some cars.A small amount of electricity is produced by diesel, but it is more polluting and more expensive than natural gas.It is often used as a backup fuel for peaking power plants in case the supply of natural gas is interrupted or as the main fuel for small electrical generators. 2 . Testing sequences and procedures are defined by various international standards, many of them set by ASTM. Identification of the Substance/Preparation and the Company/Undertaking Product Name: Nytro Libra Product Type: Insulating Oil Supplier: Nynas AB P. O. How much money do you start with in monopoly revolution? Transformer Oil is basically an Insulating Oil. This website uses cookies to improve your experience. In tropical and sub-tropical climates, it is acceptable to use oil with a pour point as high as -35°C/-31°F. 2) High resistivity leading to better insulation values between windings. To find out more, choose your product range hereunder. 6. With increasing temperature, density of oil decreases. Appearance To examined in transmitted light under a thickness of 10 cm at ambient temperature Clear Oil 2. Higher viscosity may mean better dielectric strength, but may reduce the ability of the oil to transfer heat and cool the transformer. From the standpoint of high dielectric strength, it is desirable to have a higher viscosity oil. Get info of suppliers, manufacturers, exporters, traders of Transformer Oil for buying in India. Transformer oil temperature likewise affects the density of the transformer oil. Most power transformers are filled with mineral oil refined to achieve the desired electrical and chemical properties. Equipment for Transformer Oil Reclamation. 1. Arctic grade oils are not recommended for use in non-Arctic climates where high heat is an operating factor. The oxidation reaction is the main carrier of the peroxy radicals . Basic Physical and Chemical Properties of Insulating Oil. 1. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. Transformer oils must be able to remain stable at high temperatures for long periods of times. 1. How long will the footprints on the moon last? It is therefore, best to select a compromise value for the viscosity of transformer oil that provides both good dielectric strength, and good heat transfer characteristics. In the early stages of the oil’s service life, inhibited oils are resistant to the oxidation process and will oxidize very slowly. Description. As the temperature expands, the density of the oil diminishes. Strictly Necessary Cookie should be enabled at all times so that we can save your preferences for cookie settings. An Insulating Oil must have the following properties: 1) Excellent dielectric properties resulting in minimum power loss. High grades. This means that every time you visit this website you will need to enable or disable cookies again. We'll assume you're ok with this, but you can opt-out if you wish. Large oil-filled power transformers use windings wrapped with insulating paper, which is impregnated with oil during assembly of the transformer. Severely hydrotreated oils can serve as base oils, insulating (transformer) oils, or process oils. For special arctic grades, oil pour point is reduced to as low as – 60°C/-76°F – 65°C/-85°F, but the flash point temperature is also reduced to between +90°C/ +194°F and +100°C/ +212°F. In order to perform additional tasks in transformers  (such as heat transfer and cooling) and switches, the oil must have a lower viscosity. Based on the scientific definitions, density is the ratio of the mass of the substance to its volume. Density of transformer oil depends on the manufacturer. The cleanliness class of the oil is allowed to down grade by one class after filling. 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. To ensure effective heat dissipation transformer oil should have a viscosity of at least 90 at 150°C (+302°F). fraction) is acceptable. Anti-oxidant inhibitors have been found to greatly increase the effective service life of the insulating oil by slowing oxidation caused by acids and other harmful impurities giving rise to aggressive degradation of insulating paper. Dawn Sheerin / Transformer Oil Sector Lead UK Shell Lubricants [Dawn Sheerin] In 2013, Shell launched a new product onto the market, Diala S4 ZXI. why is Net cash provided from investing activities is preferred to net cash used? PROPERTIES OF TRANSFORMER OIL. These transformer oil density are equipped with hydraulics for conducting compression tests and come with distinct power capacities. Severely hydrotreated oils can serve a variety of purpose: Nytro 4000X is an insulating oil; T110 is a base oil; Nypar 315 and Nyflex 3150 are process oils ; The given samples were provided by courtesy of Nynas AB, Sweden. The density of the heavy oil in the Shanjiasi field is up to 0.9719 g/cm 3.The dynamic viscosity of this heavy oil reaches hundreds of thousands of millipascal-seconds at 50°C. Transformer oil density is defined as the ratio of the mass of the substance to the volume of the substance. In few words, the viscosity of transformer oil can be said that viscosity is the obstruction of stream, in typical condition. Viscosity is also one of the most important properties of the oil used in transformers. This is because it tends to deteriorate over time. The density of transformer oil is usually in the range of (0.84-0.89) × 103 kg/m3. Does whmis to controlled products that are being transported under the transportation of dangerous goodstdg regulations? Why don't libraries smell like bookstores? Naphthyl or cycloparaffins 60-70 % Flush 2-4 quarts of waste oil through the sample valve before collecting the sample. From the standpoint of high dielectric strength, it is desirable to have a higher viscosity oil. The specific density of transformer oil will vary based on the manufacturer and region or location where the oil will be primarily used. Naphthenic acid < 0.02 % The need for better dielectrics and transformer oils for insulation is unequivocal. 7. Box 10700 S-121 29 STOCKHOLM Sweden E-mail address: ProductHSE@nynas.com Telephone No: +46-8-602 1200 Fax: … Transformer oil comes from purified crude oil and is obtained though distillation (boiling at between +300°C/+572°F and 400°C/752°F). 5 . Asphalt resinous substance 2.1 % Some of the main characteristics of transformer insulating oil are as follows:  Oil is a fuel, biodegradable, practically non-toxic, and does not cause damage to the ozone. Transformer oil density is characterized as the proportion of the mass of the substance to the volume of the substance. Heavy oil and bitumen are characterized by high-density, high-viscosity, and high-heavy fraction components. The all important “Dielectric Strength” of transformer oil will be greatly reduced by the presence of fibers, water, and other contaminates found in the oil. These distinctive properties of the feedstock will have an affect on the the properties of the oil. DBPC-2.6 is also known by the names Ionol and Agidol -1. Aromatics 15-20% After the anti-oxidation additives have become depleted over time and through extended use, the oil will oxidize at a rate close to the rate of oxidation in an “uninhibited” base oil. Low temperature pour point is crucial for transformers and oil circuit breakers. Max. Antioxidant additives ( ionol ) 0.2-0.5 %. Nitrogen Compounds < 0.8 % Oil-filled transformers use highly refined mineral oil to insulate and cool the windings and core. Viscosity is also one of the most important properties of the oil used in transformers. 8. The color of the oil is determined by transmitting a light and is given a numerical value between 0-5 which is compared with a series of color standards. ensures that the temperature (of the oil) must fall to -20oC before the density of the oil would exceed that of ice'. Mineral Oil: Nytro Libra SAFETY DATA SHEET Issued: March 2003 Manufacturer: Nynas AB Emergency Tel: +46-8-33 70 43 . Typical specifications are: flash point 140 °C or greater, pour point −40 °C or lower, dielectric breakdown voltage 28 kV (RMS) or greater. Standard grades. 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. Transformer Insulating Oil Characteristics. Paraffins 10-15 % Hence the name “inhibited oil.”  The most common anti-oxidant additive used to inhibit oil is Ditertiary butilparakrezolom (DBPC-2.6). Simply stated, it is the ratio of the weight of the oil to the volume or amount of oil. These transformer oil density are comprised of automated technologies that offer precise analysis and details on the outcome of a test phase. Optimal kinetic viscosity of the oil at 20 ̊C is about 28-30×10-6 m2/second. Using transformer oil with a water content of 0.0025% (wt. Specific weight of transformer oil Specific weight of transformer oil is the ratio of its weight at 20ºC to the weight of the same volume of water at 4ºC. Transformer Oil will be obtained by fractional distillation and subsequent treatment of crude oil. 45#transformer Oil , Find Complete Details about 45#transformer Oil,Transformer Oil Name,Transformer Oil Density,Transformer Oil Msds from Lubricant Supplier or … 4 . Density of Transformer Oil at 29.5oC is 0.89g/cm3. Without the ability to flow, the oil will no longer be able to perform its functions in the transformer. source- Transformer Oil Density and Viscosity - ! Immediately after pouring the oil into the transformer, allowable values for breakdown voltage is 5kV lower than before oil filling. This website uses cookies so that we can provide you with the best user experience possible. Rates of breakdown voltage (BDV), depending on the operating voltage of the equipment, must be equal (kV). It is therefore, very important to remove these contaminates and impurities before the oil becomes too degraded to prevent the acids and impurities from causing permanent damage to the transformer core and insulating paper. The oxidation chains are broken by the presence of the oxidation inhibitor additives. 2 Table 1: Mineral-Oil Based Transformer Oil Constituents Basically expressed, it is the proportion of the heaviness of the oil to the volume or measure of oil. Effectiveness also depends on the efficiency of the hydrocarbon composition of the oil, the presence of impurities of non-hydrocarbon compounds, and the amount of oil oxidation promoters (nitrogenous bases, naphthenic acids, oxygen-containing products of oil oxidation) that are found in the oil. TEST PARAMETERS TEST METHOD SPECIFICATION Min. We have considered the eleven most common ones. Gold Transformer Oil IS: 335 is an Uninhibited Transformer Oil meeting Bureau of Indian Standards: IS 335 -1993 (Reaffirmed 2005) Specifications (Clauses 5.1 and 9.1):-Sr.No. insulation, dielectric, and oil‐related faults. Before filling electric power transformers with insulating oil, apparatuses are used to pull thermal vacuum as part of the oil filling process. Sulphur compounds < 1% There are several benefits to conducting periodic analyses of a transformer's insulating fluid. Insulating oils play an important role in power supply. The density of transformer oil is usually in the range of (0.84-0.89) × 103 kg/m3. What was the weather in Pretoria on 14 February 2013? Dielectric Dissipation Factor … All Rights Reserved. As the temperature increases, the density of the oil decreases. The Dielectric properties of oils are mainly determined by the dielectric loss tangent. There are several properties of transformer oils. The density of the oil is assumed to be 0.864 kg/L. One of the most important properties of transformer oil is the ability of the oil to resist the oxidation process over periods of extended use under adverse operating conditions. Point temperature of 29.5 centigrade is defined as the proportion of the substance the. If you disable this cookie, we will not flow windings wrapped with insulating,. Rates of breakdown voltage ( BDV ), depending on the density of transformer oil with pour! Affects the density of the mass of the mass of the oil at 20 is... 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