As you can see, the list of tasks is rather large, which poses certain demands to the properties of transformer oil. Therefore, to maintain all the operating parameters of transformer oil at normal levels, it is necessary to perform certain activities: oil filtration, cleaning, drying and oil reclaiming. So Viscosity of the transformer oil should be very less. It is easy to find the viscosity value at a given temperature applying well-known mathematical methods (interpolation, extrapolation, etc. Flash point of transformer oil is the temperature at which oil gives enough vapors to produce a flammable mixture with air. 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. Determination of relative viscosity of transformer oil is carried out by means of a special device – Engler viscometer. Required fields are marked *. Standard ASTM D3238 characterizes how to ascertain the carbon dissemination and ring substance without olefin oil oils from the estimation of the refractive list, thickness and sub-atomic weight (by the nd-M technique). Testing of transformer oil is mandatory in yearly once for its maintenance. Further, thickness esteems at 15 °C are extrapolated by API (American Petroleum Institute) capacities, utilizing item aggregate ‘D’ – Lube oils. water 10cSt. In few wards, viscosity of transformer oil can be said that viscosity is the resistance of flow, at normal condition. The viscosity of oil in Engler’s degrees is the time required for efflux of 200 milliliters of oil heated to the temperature of 50°C divided by the efflux time of the same volume of distilled water, but at 20°C. Special equipment has to be used to preserve the optimal numerical value of transformer oil viscosity during the whole service life. Oils with particular carbon compose dispersion are intended for different businesses. Powerlink Oil Refinery Ltd. All rights reserved. Therefore, in practice, the best option is selected, which is able to enusre good performance of both functions. Other than giving the transformer a fluid dielectric protecting medium, transformer oil additionally fills in as the transformer’s significant coolant and … The oil’s viscosity plays an important role in the effectiveness of this heat transfer. These cookies will be stored in your browser only with your consent. It influences heat transfer and, consequently, the temperature rise in apparatus. (ASTM D455; D88) Viscosity is the resistance of oil to flow under specified conditions and is the principal factor in the convection flow of oil in an electrical device. Great oil ought to have a low viscosity with the goal that it offers less protection from the traditional stream of oil along these lines not influencing the cooling of a transformer. Thus, water is "thin"; having a lower viscosity, while honey is "thick" having a higher viscosity. Testing. Talk with an Expert Raise in temperature decreases its viscosity and vice versa. (D341) 40°C [mm²/s] 9.1459 107.99 In addition to Engler instruments for measuring relative viscosity, other viscometers can also be used: rotary, ball, electric-rotary, capillary and plasto-viscometer. Protection from stream of transformer oil implies obstacle of convection course of oil inside the transformer. Kinematic consistency esteems at 40 °C and 100 °C are extrapolated from the deliberate kinematic viscosities as indicated by ASTM D341. Transformer oil is a product obtained from crude oil. In the dielectric strength test of transformer oil, the test voltage should be raised to the specified value (or the breakdown voltage if it is less) at a uniform rate in 10-15 seconds and maintain for a one minute.Preliminary arcing should be ignored. Transformer Dielectric Fluid Comparison. Each fluid turns out to be thicker if the temperature diminishes. One of the main functions of the oil in a transformer is to transfer heat from the core to the external radiators. The oil must be mobile to transfer the heat in a better manner from the core to the transformer radiators where heat is dissipated. Process oils are likewise utilized in a few fields. Viscosity. Last modified: 2012/06/03 by dmitri_kopeliovich Except where otherwise noted, this work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License In this article, we would like to talk about viscosity. They are connected in transformers as electric protectors and coolants. Dynamic viscosity of the pure transformer oil and prepared nanofluids at various temperatures from 25 to 65 °C and solid volume fractions from 0.001 to 0.01 is experimentally investigated and shown in Fig. Base oils – consistent with their name – are the reason for an assortment of items. Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent electrical insulating properties. ), even if it is not listed in the directory. Gulf transformer oils are widely used in transformers, oil immersed circuit breakers and switch gears We also use third-party cookies that help us analyze and understand how you use this website. Oldenburg-Eversten, Deutschland, 26131. Other than giving the transformer a fluid dielectric protecting medium, transformer oil additionally fills in as the transformer’s significant coolant and warmth exchange medium. Typically this oil is of a lower viscosity and it is also generally very clean oil. Close-up of a transformer, with CGI imagery showing the oil within the transformer mechanism. 7.2. For example, the average value of transformer oil kinematic viscosity is (28-30)∙10-6 m2/s. The aged oil always has a higher viscosity than the fresh oil due to its degradation. Learn how FR3 fluid’s properties make it superior to mineral oil. Save my name, email, and website in this browser for the next time I comment. Then, it is crucial to decrease the viscosity of the aged oil. Viscosity is no exception too. The lower the viscosity, the easier the oil can be pumped or can circulate freely throughout the transformer for improved heat transfer and (c) Viscosity: Viscosity describes a fluid's internal resistance to flow and may be thought of as a measure of fluid friction. Burning of Transformer Oil in EnergyLogic Machines We have occasionally been asked about burning transformer oil with EnergyLogic waste oil heaters and boilers. In few words, the viscosity of transformer oil can be said that viscosity is the obstruction of stream, in typical condition. First of all we are talking about breakdown voltage, acid number, dielectric loss tangent and flash point. As in many cases, the selection of oil for electrical equipment requires a compromise. Do not use oil-contaminated clothing or shoes, and do not put rags moistened with oil into pockets. The classification and acknowledgment of the viscosity of these kinds of oils is vital, mainly in terms of production control and quality. You also have the option to opt-out of these cookies. Obviously resistance to flow of transformer oil means obstruction of convection circulation of oil inside the transformer. The transformer oil’s cooling ability affects the basic premises for the design and function of the transformer. This website uses cookies to improve your experience. Determination of relative viscosity of transformer oil is carried out by means of a special device – Engler viscometer. Measuring of transformer oil viscosity. The media listed above have to be considered as examples only, as their viscosity may change substantially due to different composition and/or other temperatures. Transformer oil filtration, purification, dehydration and oil reclaiming plants from GlobeCore are considered to be an energy-efficient and environmentally friendly solution to the problem of maintaining transformer oil quality characteristics! The AT2 Automated XY Stage can be installed on any new or existing 5900 and 6800 Series universal testing systems to automate compression, tensile, and flexure testing. The footage pulls back to a wider view of the transformer against the background of the power station. Viscosity of the pure transformer oil and prepared nanofluids containing 0.1 Vol% of nanoparticles in the temperature of 25 °C and shear rates of 26.4 to 237.6 s − 1. In everyday terms, viscosity is "thickness". Viscosity: It measures the oil resistance to the continuous flow without the effect of the external forces. Or contact us to find out how FR3 fluid can meet your business’s and community’s needs. 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