MIDEL 7131 is a biodegradable synthetic ester dielectric liquid designed to provide an alternative to mineral oil, silicone liquid and dry-type transformers. Traditional mineral oil transformer fluids have little capacity to absorb water, keeping most of the water remaining in the insulation paper. In many cases you will be able to detect PCB contamination just by sniffing a sample. Fans may be used to provide forced air. I know it is a C16 oil, so it is within the range of diesel (C8-C21) and has similar viscocity. Hence purchase wisely; 1 KG of oil is equal to 1.1 Litre. Its pour point is -40 o C In case of heavy faults, the oil temperature increases suddenly to high values. The thickness of the oil film is 1.5mm. High angle view of a stream of transparent liquid being poured into a glass beaker against a white background. OF cooling is the common choice for transformer above 60MVA. Transformer Oil Cooling 8 S11 OFAF cooling of transformer ! - (A) 477.65 Watts - (B) 955.31 Watts If the oil is grossly contaminated with PCB (well over 1.0, usually about 1.5) it will be above the 0.890 mark. It is used in oil-filled transformers (wet transformers), some types of high-voltage capacitors, fluorescent lamp ballasts, and some types of high-voltage switches and circuit breakers. Specific Gravity, 15.6 C/15 . PRODUCT AND COMPANY IDENTIFICATION Product Name: 76 Transformer Oil Product Code: 1041410 Intended Use: Insulating Oil . Density of water = 1 kg / Litre, so density of oil = 0.9 kg / Litre. Call +1-800-655-4473 The specific density of transformer oil will vary based on the manufacturer and region or location where the oil will be primarily used. Thus, the dielectric quality of transformer oil is essential to secure operation of a transformer. kg/m³. . A transformer is a device that can transfer electrical energy from one circuit to another through an inductively coupled conductor which is the transformer's coils. Basic screening tests indicate the dielectric strength, interfacial tension, water concentration, specific gravity, and acidity of the oil. In many cases you will be able to detect PCB contamination just by sniffing a sample. 11001 - transformer oil revision date:may 2003 safety data sheet transformer oil 1. identification of the substance/preparation and the company: . 4.4.1 Specific Gravity- Results for Transformer Methyl Ester Blends with Diesel T10, T20, T30, T40 S.no Oil Percentage Specific Gravity 1 Diesel D100 0.835 2. S G = ρ g a s ρ a i r. In the exam, if the reference substance is not specified for a specific gravity problem, it is usually safe to assume that you . The oil can be separated from the soap either by gravity separation or by using commercial centrifuges. Property. With the below formula, mathematically, density, mass, and volume have relativity: ρ=m/V where ρ=density, m=mass, and V=volume. In addition, dissolved gases are extracted from the oil sample . Location of transformer sampling valve. A varying magnetic flux will be created in the transformer's core by the varying current in the primary winding and thus a varying magnetic field through the secondary winding and the varying magnetic field will induce a . This natural circulation of the oil is due to the gravitational buoyancy . Description 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. Mineral transformer oil. abstract: in north america, the density, or the specific gravity of mineral insulating oils, has traditionally been considered to be of no significance in establishing the suitability of the oil for specific applications, but has only been of value to the purchaser in signalling any drastic change in the base crude stock from which the oil was … This means it can be used to measure water content in a variety of . PPM Testing offers comprehensive transformer fluid testing to the electrical utility industry. 3. This enables it to be used in many applications In practice the velocity is around 0.5 m/s and up to 1 m/s. The obtained soap has a higher specific gravity than the neutral oil and tends to settle at the bottom. So the specific gravity of oil is almost 0.9. Properties of Transformer Oil: Its dielectric strength is 40kv/mm/min Its flash point is 160 o C Sludge value percentage is 1.2 Its specific gravity is 0.88 Its dielectric constant is 22. The aging rate of the paper doubles with each doubling of the water content, promoting a cycle of accelerated breakdown. In air-cooled transformers are cooled by circulating air over or through the enclosures. (ASTM D1298) The specific gravity (relative density) of an oil is the ratio of the weights of equal volumes of oil and water. If the oil is heated, its specific weight decreases, and vise versa when the oil is cold. Transformer Oil Analysis tests identify whether the insulating properties are acceptable by measuring degradation and contamination of the oil. Density of oil is about 90% of water density. (ASTM D1298) The specific gravity (relative density) of an oil is the ratio of the weights of equal volumes of oil and water. & Applied Sci., 1 (4): 384-388, 2008 385 of the oil are viscosity, specific gravity, flash point, oxidation stability, total acid number, breakdown Regardless of the specific oil type chosen for a transformer, following the recommended maintenance schedule goes a long way in helping the transformer and oil serve their purposes. . oil composition and to relate certain phenomena that have been demonstrated to be related to oil 1 Stoke = 100 mm 2 /second. The KF-LAB MkII also has a default setting optimized for analyzing insulating oils with an SG of 0.875. The test results show that the mineral transformer oil mixed with corn oil to ≥40% slightly decreased in insulation strength with a voltage breakdown of 30.66 kV/2.5 mm (MJ0) to 20.93 kV/2.5 mm. Silicone is a K class transformer fluid, meaning it has a fire point above 300C. (d) Approximate Price Comparison: The relative price of various fluids compares to Mineral Oil to a base of 1.0. The specific gravity of fresh engine oil was 0.90, while the specific gravity of used engine oil was 0.93. the result of the specific gravity for the composite solvent extraction treatment is 0.88, the specific gravity of single solvent extraction treatment is 0.858, and a specific gravity of acid treatment is 0.909 as shown in Figure 3. T110 base oil. Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent electrical insulating properties. gravity.Relationship: centistokes x specific gravity = centipoises Density at 60°F (15.6°C) 0.880 *10³. Due to lower specific gravity of SF6 gas, the gas insulated transformer is usually lighter than the oil insulated transformer. Shell Diala S4 ZX-I is specially dried and handled to achieve a low water content and retain a high breakdown voltage at point of delivery. For mineral oil, the power factor of new oil should not exceed 0.05 percent at 25 degrees C. % Relative density (specific gravity) D1298: Determines the density, relative density (specific gravity), or API gravity of transformer oil by use of hydrometer at a reference temperature. to the active parts of the transformer, the specific gravity of the oil decreases, causing the oil to travel upwards towards the inlet of the coolers. Physical properties of Oil Specific Gravity-The specific gravity of a substance is a comparison of its density to that of water. The oil processing and filling unit suck the oil from drums to the heating tank then degassed unit and filled in to the transformer. It means, 0.9 kg oil = 1 Litre oil and 1 Kilo Gram of oil = (1/0.9) Litre = 1.1 Litre. That'll be the case when using mineral-based oils . Base Oils. Answer: The specific density of transformer oil will vary based on the manufacturer and region or location where the oil will be primarily used. Am. A high specific gravity indicates the oil's ability to suspend water. Specific Gravity at 15 deg C kg/l, ASTM D 4052.86: Flash Point . Type in a partial Product Name or SDS number. Our experienced personnel, utilizing new and state of the art equipment, provide a broad range of fluid tests and diagnostic interpretation to . PSS' comprehensive, 19-point testing process will test your . MCQs: The kinematic viscosity of oil of specific gravity .8 is .0005 .This oil is used for lubrication of shaft of diameter .4 m and rotates at 190 rpm. Nytro 4000X insulating oil. An effective transformer cooling system can improve the transformer capacity by 25% to 50%. Narrow your search by Language and/or Region (optional). Type of oil. (The typical reference point is the average winding rise (AWR) of the transformer, which is limited to 55°C for mineral-oil designs with standard Kraft paper and 65°C for mineral-oil designed with thermally upgraded Kraft (TUK) paper for an average ambient temperature of 30°C. If the primary coil has 288 turns and secondary coil has 1,467 turns what will be the out … put voltage . Flush 2-4 quarts of waste oil through the sample valve before collecting the sample. ! It is used in oil-filled transformers (wet 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 . Connect the intake suction to the oil drum using hydraulic hose. This means, in the event of a transformer failure due to an arc or lightning strike, there would be no pool fire . Take the sample from the bottom of the transformer when the specific gravity of the fluid is less than 1.0. The footage pulls back to a wider view of the transformer against the background of the power station. Basic screening tests indicate the dielectric strength, interfacial tension, water concentration, specific gravity, and acidity of the oil. Calculate the power lost in the bearing for a sleeve length of 90mm. Table 2 Mineral Oil 1.0 Beta Fluid 4.0 FR3 5.0 Bio-Temp 6.0 Silicone 7.0 (9) Application in LTC's, Since most of the tap-changers were developed historically for mineral oil . Leave a Reply Cancel reply. Find an answer to your question Oil with a specific gravity of 0.72 is used as the indicating fluid in a manometer. Specific Gravity: 0.88 - 0.89 Bulk Density: 7.33 - 7.41 lbs/gal Viscosity cSt @ 100°C: 2.2 - 3.0 Viscosity cSt @ 40°C: 9.4 - 12.0 Specific gravity for gases is defined as the ratio of the density of the gas to the density of air at a specified temperature and pressure. Take the sample from the bottom of the transformer when the specific gravity of the fluid is less than 1.0. IPTOL our registered trade mark of Transformer oil and is made from refined mineral oil without any additive and sufficiently free from moisture that is stable at high temperatures and has excellent electrical insulating properties, good oxidation stability, low volatility and resistance to sludge formation.. Get Enquiry Specification Specification Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent electrical insulating properties. SG = specific gravity of the oil. Crude Oil Viscosity vs. Email : [email protected], Phone : 9811274820 gas specific gravity, air=1 R s = solution GOR, scf/STB V o = volume of crude oil, L 3: V g = volume of gas, L 3: W g = Specific gravity. In extremely cold climates, specific gravity can be used to determine whether ice, resulting from freezing of water in oil-filled . Oil with kinematic viscosity 0.1 Stoke . A high specific gravity indicates the oil's ability to suspend water. If the oil is grossly contaminated with PCB (well over 1.0, usually about 1.5) it will be above the 0.890 mark. By applying the above standard, the static pressure in this case is expected to be about 2.5 mtr x 0.8 = 2 bar, assuming the specific gravity of oil is 0.8. In a single phase transformer the input voltage is 49 V . I have seen uncontaminated transformer oil anywhere between 0.865 to 0.890. Viscosity, specific gravity and refractive index showed an increase with the addition of a mixture of corn oil in mineral oil. 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. Value in metric unit. For gases the Specific Gravity is related to air. As the oil travels through the heat exchangers or coolers, its specific gravity increases, allowing it to flow downwards. TRANSFORMER OIL PURCHASE SPECIFICATIONS (Developed Under the Auspices of the Doble Oil Committee) March, 2017 . BHP = GPM X Head X Specific Gravity / 3960 x Pump Eff Viscosity Conversion Table Effects of Viscosity - Viscous liquids tend to increase pump HP, reduce efficiency, reduce capacity and head and increase pipe friction. Severely hydrotreated oils can serve as base oils, insulating (transformer) oils, or process oils. At these temperatures, silicone has a higher viscosity than ester fluids, lowering the transformer's true power rating. Univolt™ N 61B is a good quality, fully inhibited transformer oil designed to meet the operating requirements of transformers and other oil filled electrical equipment. You must be logged in to post a comment. Waste Transformer Oil T100 0.82 3 Blends of Transformer Oil With Diesel T10 0.83 T20 0.838 T30 0.84 T40 0.8414 Table: 4.1Results of Specific Gravity for TOME and Diesel 4.5 CALORIFIC VALUE Small-scale refiners use gravity separation route, whereas large capacity plants utilizes commercial vertical stack bowl centrifuges. 1 Per OPPTS 835.3110 2 Per OECD 203, Method B 3 Per OECD 420 4 Less-Flammable Transformer Fluids, Approval Guide - Electrical Equipment, FM Click the Product Name to open the PDF document. Kinematic-viscosity-of-transformer-Oil. The oil is (forced or) pumped to the heat transfer zone where the air is forced by a fan. A high specific gravity indicates the oil's ability to suspend . Seed oil-based coolants actually draw existing moisture out of the paper, reducing . The specific Gravity of water is 1.0. Also, consider the viscosity and temperature to be inversely symmetrical. Contact us for more information and for us to better serve you. OEMs recommends a maximum flow velocity of 1 m/s for the insulation oil . transformer Oil filling is in progress, open the radiator valve one by one until such time the radiator is filled with oil. Specific Gravity - SG - is a dimensionless unit defined for liquids as "the ratio of the density of the substance to the density of water at a specified temperature". 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/+6. Under any condition, density will be defined by . Click "Submit". OK - today I was given a 55 gallon drum of Dielektrol transformer oil. . Sampling from the bottom would provide the most water content in the fluid. *Poises and centipoises are given for oil of .8 spec. transformer will run a few degrees hotter. Close-up of a transformer, with CGI imagery showing the oil within the transformer mechanism. Specific gravity. APAR POWER TRANSFORMER OIL; View complete range ; . According to the cooling methods used, transformers can be classified into air-cooled transformers and oil cooling transformers. In addition, dissolved gases are extracted from the oil sample . These vital tests can uncover several potential problems within a transformer, including evidence of soluble contaminants, dielectric contaminants, and acid materials. Specific Gravity for common fluids are indicated in the table below. Natural API gravity, relative density uses a standard temperature of 60°F. Generally, the results will include measurements for color, dielectric breakdown voltage, dissolved gas analysis, dissolved metals, flash point, furan, inhibitor content, interfacial tension, moisture, PCB's, power factor and specific gravity. Engine oil Diesel oil Light Oil White kerosene Gasoline Fluid name Temperature 20˚C 100˚C 200˚C 100˚C Normal temperature 20˚C Normal temperature Normal temperature Normal temperature 20˚C 20˚C 20˚C 60˚C Viscosity mm2/s 230 - 280 3 0.8 About 1 25 - 110 About 1100 1,400 - 6,900 1,400 - 14,000 13,000 - 129,000 About 13 About 6 1.0 0.5 . The test results show that the mineral transformer oil mixed with corn oil to ≥40% slightly decreased in insulation strength with a voltage breakdown of 30.66 kV/2.5 mm (MJ0) to 20.93 kV/2.5 mm. With proper oil maintenance, that degradation can be delayed significantly, resulting in increased transformer life. That'll be the case when using mineral-based oils . . Mineral based oil. Oct 9, 2011. The specific Gravity of water is 1.0. Regardless of the specific oil type chosen for a transformer, following the recommended maintenance schedule goes a long way in helping the transformer and oil serve their purposes. Natural (Vegetable Oil) Ester Fluids Used in Electrical Apparatus. Most of the oil's density will range between 700 and 950 kg m3. This means operators can get the same power rating for a smaller transformer, yielding significant space savings. SFS provides Naphthenic Base Oils and Paraffinic Base Oils that come in a wide range of viscosities for your specific application. 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. SUNOCO TYPE II TRANSFORMER OIL is an electrical insulating naphthenic oil that meets the ASTM D-3487 specification for inhibited oils. J. Engg. This study, however, revealed that the values of specific gravity in all the oil samples studied were The values of pour points obtained from this study as shown lower than the permissible limits of 0.89 - 0.91 set by [8] in figure 2.6, show that among the plant seed oils assessed, except Shea oil sample, which had the specific gravity of . ! The good low temperature viscometric properties of the oil ensure proper heat transfer inside the transformer, even from very low starting temperatures. Transformer oil specifications include boiling point greater than 176 degrees C, vapor density greater than 5, flash point greater than 145 degrees C, auto ignition temperature greater than 343 degrees C & 0.91 specific gravity. The dielectric strength of SF6 gas is a function of the operating pressure; the higher the pressure, the higher the dielectric strength. 76 Transformer Oil 1.
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