Fluids - Specific Gravities - Specific gravities for some common fluids like acetone, alcohol, turpentine, oil and more .. Hydrocarbons - physical data - Molweight, melting and boiling point, density, flash point and autoignition temperature, as well as number of carbon and hydrogen atoms in each molecule are given for 200 different hydrocarbons 0000069741 00000 n 0000002539 00000 n 0000103005 00000 n Insulating transformer oil shall be tested for -Dielectric breakdown voltage, Water content, Acid neutralization number, Specific gravity, lnterfacial tension, Visual condition, Color, Power factor tests. Having a positive pressure will make sure that you won’t suck up any outside ambient air to the inside of the transformer when you begin your oil sample. 7: Specific resistance of the oil specimens from 0000102984 00000 n The Density (Specific Gravity) of the oil is the ratio of the weights of equal volumes of oil and water. Immediately based off of color, you can tell what kind of transformer oil it is. Specific Gravity (D1298 or D4052) The specific gravity of an oil is the ratio of the weights of equal volumes of oil and water determined under specified conditions. Acetylene, Hydrogen, Ethylene, Methane and Carbon Monoxide are a few we look out for. Basic screening tests indicate the dielectric strength, interfacial tension, water concentration, specific gravity, and acidity of the oil. A typical specification for new oil is 0.84 to 0.91. If the transformer is under a vacuum, you need to apply a nitrogen blanket to bring the pressure up to 0 psi or above 0 psi to a positive pressure. Usually this parameters is not regulated and is within 0.856 to 0.886. The system has the following PVT properties: API = 47.1 p b = 2377 γ g = 0.851 γ gs = 0.873 R sb = 751 scf / STB B ob = 1.528 bbl / STB. Or if it is a parking garage, you may not care about flash point at all. Transformer oil or insulating oil is a highly refined mineral or silicone oil that is stable at high temperatures and has excellent electrical insulating properties. Larger transformers in secured locations (behind a security fence) will have a valve on the bottom of the tank that is readily accessible. 76 Transformer Oil 1. Transformer Oil. 0.895. Transformer Oil Analysis tests identify whether the insulating properties are acceptable by measuring degradation and contamination of the oil. The specific gravity of a liquid does not alter the centrifugal pump curve at all. 0000048783 00000 n It also insulates the transformer and allows electrical components to be more compact than free air apparatus. For fluids with a specific gravity less than 1.0, such as mineral-based transformer oils, synthetic fluids and silicone oils, the sample should be taken from the bottom since water will … Transformer Oil White Oils Ink Solvent Textile Oil Rust Preventive Rubber Process Oil Hydraulic Oils Metal Working Fluids. 0000113640 00000 n Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent electrical insulating properties. 0000065830 00000 n 0000027616 00000 n cv�P,�2$����� q�� �[�A��J�H�6�L?����(-�.,ū�-�'��hzj�$J�rv�ȩ1�/�gك����YY�&�ɒ���R���;I�Q�� 1lVl-e����9�xA(�m[���n�'�����J�t�\pr�nv��qP�a�t��l‡�jnRʠ�o7����`��fkE^q}�0|�����K�v�4����ms��TO Yh�Vտ^8Vǣn�$H >���R\g�A���8v6A6��1�I;$�� R8o#C˦Xi� ����p��3���N�ڃ�c� �|Sä1b�D~x�/q_�v�8bS�h����/B�(*Oq�ň��b���}bTʁ�9uш,;~���a��}T�+�ؤ�� t>�?5�-��|K��]�r�������t�:�����3�?�K,R� ��jg�@�MVȎ vg�������� 38\��@rޭ�� γ o = specific gravity of the stock-tank oil. Different types of transformers warrant different things. 0000112517 00000 n Taking a bad oil sample is a very easy task. (The specific gravity of water is 1.0. In many cases you will be able to detect PCB contamination just by sniffing a sample. 0000062347 00000 n The following tests can be adopted before using the insulating oil. The hotter the windings are, the more moisture content will be expelled from the windings into the oil. As acid levels increase, the quality of the oil decreases, causing dielectric loss, corrosion, and thermal problems from sludge. Water has a specific gravity of 1.000; transformer oil is lighter than water, so the specific gravity is less than one. Specific Gravity of Page 3/5. Solution. γ g = specific gravity of the solution gas. If you stand outside of a house, and look through the window, you can see a glimpse of what may be inside. Larger transformers may even have fans attached to the fins to assist in the cooling process. Does the oil have a specific gravity >1 or <1. D2864 Terminology Relating to Electrical Insulating Liquids and Gases. Acces PDF Transformer Oil Sampling Neta International Electrical Gas-specific gravity: 0.77 (1.0 for air). Traces of acetylene may be formed if the fault is severe or involves electrical contacts. It can also be used for outdoor applications. Mineral oil, Silicone oil, or FR3 are the most common oil types in my particular working area. While, it is used extremely cold climates, specific gravity, physical and chemical reaction. Transformer Oil Analysis tests identify whether the insulating properties are acceptable by measuring degradation and contamination of the oil. 0000001824 00000 n The most common oils include sunflower, safflower, and soybean oil. It simply affects the horsepower required to turn the pump at the required speed. f cellulose is overheated, carbon monoxide is generated. Viscosity is also affected by temperature, such that in a cold climate it is important that the viscosity is sufficiently low to enable adequate oil circulation. D3300 Test Method for Dielectric Breakdown Voltage of Insulating Oils of Petroleum Origin Under Impulse Conditions. Transformer Oil – What is it, and why sample? 0000102327 00000 n 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. The specific density of transformer oil will vary based on the manufacturer and region or location where the oil will be primarily used. Our comprehensive range of services, including oil, hydraulic fluid, fuel, transformer, silicon, coolant and gas analysis, are tailored to your specific requirements so you always have the resources available when you most need them. Your email address will not be published. 0000007923 00000 n If the transformer is a padmount style transformer that is 13,800V Primary and 480/277V or 208/120V, you may need to de-energize the transformer for safety reasons. 0000085018 00000 n As a result, the insulation system can last up to three times longer than in a mineral oil filled transformer. Breakdown voltage is measured by observing at what voltage, sparking strands between two electrodes immersed in the oil, separated by a specific gap. The type of particles will help to narrow the list of components involved in the fault. Mineral Oil is considered as a top choice in outdoor installations where low cost and flammable nature is understood and accepted. Density (Specific Gravity) ASTM D1524 Density, Relative Density (Specific Gravity) or API Gravity of Crude Petroleum and Liquid Petroleum by Hydrometer Method. Metals that may be found in transformer oil are: aluminium, copper, iron, lead, silver, tin and zinc. Aging Study and Lifetime Estimation of Transformer Mineral Oil Mohammad R. Meshkatoddini ... of the oil are viscosity, specific gravity, flash point, oxidation stability, total acid number, ... of the oil [1,2]. Fig. 0000061889 00000 n Envirotemp™ FR3™ fluid is hydrophilic, meaning – water is absorbed by the fluid or wicked away from the insulation paper. 0000113986 00000 n This is a test of a physical property that relates to the oil’s composition and function. Specific Gravity: 0.88 - 0.89 Bulk Density: 7.33 - 7.41 lbs/gal Specific Gravity of Transformer Oil, ... Another instance when the sampling point of a transformer can change is after the retrofill of insulating fluid, such as Askarel to Silicone. Most people will argue that you should de-energize the transformer before taking a sample. Oil viscosity is an important controlling factor in the dissipation of heat. 0000062118 00000 n Oil stored in drums does not retain its original dielectric strength and should be tested and treated before use in electrical equipment. Relative Density or Specific Gravity. Fluids - Specific Gravities - Specific gravities for some common fluids like acetone, alcohol, turpentine, oil and more .. Hydrocarbons - physical data - Molweight, melting and boiling point, density, flash point and autoignition temperature, as well as number of carbon and hydrogen atoms in each molecule are given for 200 different hydrocarbons Specific Gravity - Direct ratio of any liquid's weight to the weight of water at 62 degrees F. Water at 62 degrees F weighs 8.33 pounds per gallon and is designated 1.0 sp. 0000060664 00000 n 0000064605 00000 n Classic Micro Minerals - Manufacturer of Transparency Minerals, Specific Minerals Gravity & Cleavage Minerals from Kishangarh, Rajasthan, India 0000084734 00000 n AES Laboratories provides complete transformer oil and insulating oil analysis and testing services. Taking a good oil sample is not a difficult task. I have seen uncontaminated transformer oil anywhere between 0.865 to 0.890. 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. As the temperature expands, the density of the oil diminishes. These oils typically consist of raw vegetable oils. %PDF-1.4 %���� Different cases of transformer oil used in tests are: - Transformer oil of transformers (1 & 5) is new (fresh). This data set quantifies the electrical loss rate. It is used in oil-filled transformers, some types of high voltage capacitors, fluorescent lamp ballasts, and some types of … So the higher the temperature, the more moisture content will be exposed in the oil sample. 0000063961 00000 n 0000057949 00000 n Water in insulating liquids: ASTM D 1533. Insulating oils play an important role in power supply. 9: ASTM D-3612/IEC-60599: Analysis of Gases Dissolved in Electrical Insulating Oil by Gas Chromatography. We are based in the Washington, DC Metropolitan Area and are prepared to respond to any electrical emergency or need you may have. (��RY��.o���﵀��k)X�K_#�����x It is a highly refined mineral oil that is stable at high temperatures and has excellent electrical insulating properties. 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. High angle view of a stream of transparent liquid being poured into a glass beaker against a white background. Certain transformer components produce specific metal particles. The greater the specific gravity and particle size and the lower the density and viscosity of the oil, the higher the precipitation rate of the impurities. If the oil has a specific gravity >1, this means the oil will settle to the bottom and any water or moisture will sit on top. Color is an important indicator of quality, aging and the presence of contaminants. Required fields are marked *. You need to take your sample from the top. The characteristics of the transformer oil are analyzed at cool and very hot temperatures. D4052 Test Method for Density, Relative Density, and API Gravity of Liquids by Digital Density Meter This can be tricky. 20ºc to the fins to assist in the dissipation factor in the fault relatively! 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