To ensure effective heat dissipation transformer oil should have a viscosity of at least 90 at 150°C (+302°F). Also, it should be free from any suspended matters. 4 . What is the balance equation for the complete combustion of the main component of natural gas? Who is the longest reigning WWE Champion of all time? This website uses cookies so that we can provide you with the best user experience possible. 6. 1. As the temperature expands, the density of the oil diminishes. 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. Low temperature pour point is crucial for transformers and oil circuit breakers. What did women and children do at San Jose? Density(K G/dm³) @20°C ISO 3675 0.89 Max 3. 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. Basically expressed, it is the proportion of the heaviness of the oil to the volume or measure of oil. There are several properties of transformer oils. Transformer oil temperature likewise affects the density of the transformer oil. These transformer oil density are comprised of automated technologies that offer precise analysis and details on the outcome of a test phase. Strictly Necessary Cookie should be enabled at all times so that we can save your preferences for cookie settings. Hence the name “inhibited oil.”  The most common anti-oxidant additive used to inhibit oil is Ditertiary butilparakrezolom (DBPC-2.6). insulation, dielectric, and oil‐related faults. The Dielectric properties of oils are mainly determined by the dielectric loss tangent. Most power transformers are filled with mineral oil refined to achieve the desired electrical and chemical properties. Localised grades. Flush 2-4 quarts of waste oil through the sample valve before collecting the sample. With increasing temperature, density of oil decreases. Oil Purification and Regeneration Equipment. 5 . Depending on the origin of the crude base stock oil, it will contain different properties. to Transformer oils (insulating oils) to Properties of fluids. 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. Insulating oils play an important role in power supply. High grades. A good number of these properties are experimented upon by using the breakdown 1. TRANSFORMER OIL IEC 296 Class II A Speciality Oils & Lubricants Product Data Sheet SR NO. 2) High resistivity leading to better insulation values between windings. 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. Using transformer oil with a water content of 0.0025% (wt. There are a few variables with cooling fins for Air Natural convection cooled transformers. Copyright © 2021 Multiply Media, LLC. 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. 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, … why is Net cash provided from investing activities is preferred to net cash used? Viscosity is also one of the most important properties of the oil used in transformers. Description. How much money do you start with in monopoly revolution? 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. The density of the oil is assumed to be 0.864 kg/L. Get info of suppliers, manufacturers, exporters, traders of Transformer Oil for buying in India. The need for better dielectrics and transformer oils for insulation is unequivocal. Antioxidant additives ( ionol ) 0.2-0.5 %. Identification of the Substance/Preparation and the Company/Undertaking Product Name: Nytro Libra Product Type: Insulating Oil Supplier: Nynas AB P. O. 8. Simply stated, it is the ratio of the weight of the oil to the volume or amount of oil. How long will the footprints on the moon last? As the name suggests, the oil sample is compared with a previous sample from the same transformer and is checked for darkening of oil. Viscosity is also one of the most important properties of the oil used in transformers. I digitized one design for an example into a spreadsheet. Mineral Oil: Nytro Libra SAFETY DATA SHEET Issued: March 2003 Manufacturer: Nynas AB Emergency Tel: +46-8-33 70 43 . All Rights Reserved. Aromatics 15-20% As the temperature increases, the density of the oil decreases. To find out more, choose your product range hereunder. Large oil-filled power transformers use windings wrapped with insulating paper, which is impregnated with oil during assembly of the transformer. Density of Transformer Oil at 29.5oC is 0.89g/cm3. 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. Transformer oils primary insulate and cools transformers, but can also be found in other electrical equipment, such as high voltage switches and circuit breakers. ensures that the temperature (of the oil) must fall to -20oC before the density of the oil would exceed that of ice'. Table 12.2 shows that all heavy oil and bitumen produced in China has density >0.9 g/cm 3 at 20°C. In the early stages of the oil’s service life, inhibited oils are resistant to the oxidation process and will oxidize very slowly. The oxidation reaction is the main carrier of the peroxy radicals . Mineral-oil based transformer oil is composed of the materials listed in the Table below. Severely hydrotreated oils can serve as base oils, insulating (transformer) oils, or process oils. These have a pronounced affect on the function of the oil. Higher viscosity may mean better dielectric strength, but may reduce the ability of the oil to transfer heat and cool the transformer. The ratio of weight of oil to kVA rating follows a power series. Transformer oil's primary functions are to insulate and cool a transformer. Equipment for Transformer Oil Reclamation. From the standpoint of high dielectric strength, it is desirable to have a higher viscosity oil. Asphalt resinous substance 2.1 % Transformer Oil will be obtained by fractional distillation and subsequent treatment of crude oil. 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. Dawn Sheerin / Transformer Oil Sector Lead UK Shell Lubricants [Dawn Sheerin] In 2013, Shell launched a new product onto the market, Diala S4 ZXI. 2 Table 1: Mineral-Oil Based Transformer Oil Constituents Based on the scientific definitions, density is the ratio of the mass of the substance to its volume. 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. Rates of breakdown voltage (BDV), depending on the operating voltage of the equipment, must be equal (kV). Density: – The density of healthy transformer oil should be 0.89 gram per cubic centimeter at the temperature of 29.5 centigrade. The effectiveness of the additive is based on its ability to interact with the active peroxy radicals which are formed by a chain of hydrocarbons. Typical specifications are: flash point 140 °C or greater, pour point −40 °C or lower, dielectric breakdown voltage 28 kV (RMS) or greater. Transformer oil temperature also has an effect on the density of transformer oil. Fresh oil should solidify at a temperature no greater than a pour point temperature of -45°C/-49°F. 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. Special grades. In few words, the viscosity of transformer oil can be said that viscosity is the obstruction of stream, in typical condition. 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 Standard grades. 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. Product Name: Nytro Libra Product Type: insulating oil must have the following properties: 1 ) Excellent properties! Color of the substance to the volume or measure of oil functions in the Table below breakdown voltage is lower. Standard 335 testing sequences and procedures are defined by various international standards, transformers! Of waste oil through the sample and high-heavy fraction components or amount oil! 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