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The tests results allow to make a comparison between the different mixtures proposed and to select the best. 2.3. New oils Residual Transformer Oil: A successful retrofill job depends on removing as much of the original fill fluid as possible. Product Brochure. Refer below test report. A gear lubricant and an engine oil having the same viscosity will have widely different SAE grade designation as defined in the two classifications. It is shown that the degradation rate of oils represented by kinematic viscosity is changed according to ester rate under thermal stress. The numbers are commonly assigned in ranges of 5, 10, 20, 30, 40, and 50. Viscosity mm²/s. None . The fluid should be tested in six months to determine if additional work is needed. Measuring the Viscosity of Transformer and Insulation Oil. The ability to flow is most often selected by the Society of Automotive Engineers (SAE) numbers. Sae-20 motor oil 500cSt. The ideal oil would have a specific gravity in the upper portion (> .83) of the range specified under "required properties" and a viscosity between 12 cST at 40 o C (70 SUS at 100 o F) and 18 cSt at 40 o C (100 SUS at 100 o F). Price: Rs 150 / Kilogram Get Latest Price. Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent electrical insulating properties. The fluid of claim 1 wherein the oleic acid content of the oil is about 30% or greater. The viscosity is the Dynamic viscosity and it is measured in centipoise cP. In India, transformer oil is tested on the basis of IS 335. The stability study of thermal aging is an essential tool to estimate the lifetime of insulating oil and therefore for the transformer. is an electrical insulating naphthenic oil that meets the ASTM D-3487 specification for inhibited oils. Generally the viscosity of lubricants means the kinematic viscosity expressed in cSt and the viscosity expressed in units other than cSt is as follows: ① cSt (Kinematic Viscosity) Strokes refer to the kinematic viscosity expressed in C. G. S and one hundredth of it is expressed in centistroke (cSt). 7. 1 St = 100 cSt or 1 cSt = 10⁻⁶ m²/s. The oil helps to cool the transformer and Being dielectric in nature, the transformer oil provide superior insulation for the transformer core. The table at the right, SAE Viscosity Chart (High Temp), shows the equivalents for cSt and SAE viscosity numbers. Conduction cooling is major heat removal mechanisms in transformers and higher viscosity would be expected to result in higher hot spot temperatures within the transformer. Oil with a viscosity that does not change much between 40°C and100°C will have a higher VI than an oil with a greater change in viscosity. Check ASTM D 2161 "Standard Practice for Conversion of Kinematic Viscosity to Saybolt Universal Viscosity or to Saybolt Furol Viscosity" 2) Water at 68.4 o F (20.2 o C) has an absolute viscosity of one - 1 - centiPoise. 27CHDPP3712N1Z1. Water at 20 °C has a kinematic viscosity of about 1 cSt. the oil, while viscosity, flash point, specific resistance, transformer insulation, interfacial tension decrease with age. The viscosity is the Kinematic viscosity is measured in centistokes cSt (or mm2/s). In engineering, centistokes (cSt) are usually used. An oil that is 9.2 cSt will be nearly the same viscosity as an oil that is 9.3 cSt, yet one is an SAE 20 and the other is an SAE 30. Oxidising properties The mixture itself has not been tested but none of the ingredient substances meet the criteria for classification as oxidising. @ 100oC. The ISO viscosity classification uses mm2/s (cSt) units and relates to viscosity at 40oC. Motor oil viscosity is a common term we need to understand completely, and it refers to the ability of an oil to flow. Description. filled with a fire resistant oil. manufactured in the viscosity range from 0.65 cps to 60000 cps, can be easily converted into emulsion by using non ionic emulsifiers. Dahisar East, Mumbai, Maharashtra. The numbers indicate to the nearest whole number, the mid points of their corresponding brackets. Viscosity of insulating liquid affects the ability to transfer heat by conduction. Absolute, Dynamic and Kinematic Viscosity - Dynamic, absolute and kinematic viscosities - convert between CentiStokes (cSt), centipoises (cP), Saybolt Universal Seconds (SSU) and degree Engler Crude oil viscosity as function of gravity - Viscosity at 20°C/68°F and 50°C/122°F for more than 120 crudes is shown as function of specific gravity@15°C/60°F Alpha-1 Fluid's low viscosity will minimize the temperature rise associated with the retrofill. Manufacturer of Industrial Oil - Transformer Oil, Defoamer Oil, Chain Oil offered by D R P Silicone, Mumbai, Maharashtra. Name Method Units Insulating Oil Product Code 33165 Viscosity @ -15°C ISO 3104 cSt 400 Viscosity @ 40°C ISO 3104 cSt 9 Closed Flash Point ISO 2719 °C 140 Pour Point ISO 3016 °C -57 Density @ 20°C ISO 3675 g/ml 0.879 Neutralisation value IEC 62021-1 mgKOH/g … Sae-5 oil 100cSt. For oils with the same specific gravity, we would opt for the lower viscosity. The Viscosity Index Test (ASTM D 2270) is based on the Kinematic viscosity of the oil at 40°C (104°F) and 100°C (212°F). DMSO extractable compounds for base oil substance(s) according to IP346 You'll see the ranges for cSt compared to SAE numbers. The fluid of claim 3 wherein the antioxidant produces an electrically-insulating fluid having a kinematic viscosity in the range of 20-40 cSt as desired at 40° C. and the antioxidant is a free radical scavenger. Viscosity cSt. Not applicable . Approx. The normal operating temperature viscosity for a 30 grade oil needs to have a viscosity range on the SAE chart of between 9.3 and 12.5 centistokes – at 100°C. : 3.0 12.0 Pour Point, oC. In the last five decades in India, there is a drastic change in production technology. Physical properties • Viscosity. Low viscosity of the transformer oil is an advantage for heat dissipation. Get Best Quote. The respective increase or decrease are detrimental to the transformer We offer the transformer oil in barrels, flexi bags & … 9.2. Explosive properties . Vapour density . warmer after being retrofilled with Alpha-1 Fluid. The oil used in the transformer is a key element to check the physical condition of the unit. Oils with a high VI Oil viscosity is graded by measuring the time it takes for a standard amount of oil to flow. Explosive under the influence of a flame Not considered to be explosive. Oil has three different basic properties that identify the suitability of the oil for the purpose of insulation and cooling. Additional information is available upon request. It consists of a series of 18 viscosity brackets between 1.98 mm2/s and 1650 mm2/s, each of which is defined by a number. ), shows the equivalents for cSt and SAE viscosity Chart ( Temp... Make a comparison between the different mixtures proposed and to select the best often selected by the of... In production technology of the original fill fluid as possible classification uses mm2/s ( cSt ) are used. Possibly lowering the fire point and higher saturates compared to SAE numbers ranges... Will mix with the same specific gravity, we would opt for the purpose of insulation and cooling 2016! 60296 21011 Specifications 10⁻⁴ m²/s ) units and relates to viscosity at 40oC 1 wherein Base... By D R P Silicone, Mumbai, Maharashtra about 30 % or greater for as. I Base oils, and 50 manufactured in the unit will mix viscosity of transformer oil in cst the.! Frequently used in different types of transformers for its dielectric strength as well as electrical properties centistokes (! The retrofill ( 40°C ): 0,096cm²/s ( 9,6 cSt ) units and relates to viscosity at 40oC oil! ; RESOURCES ; Base oils have lower sulfur and higher saturates compared to group I Base oils m²/s... Request Quote ; Written by AZoM Sep 20 2016 is changed according to rate! Will minimize the temperature rise associated with the same specific gravity, we would opt for the transformer oil also... 'S low viscosity will minimize the temperature rise associated with the same specific gravity, we would opt for transformer... By D R P Silicone, Mumbai, Maharashtra Get Latest price cSt = m²/s! And Being dielectric in nature, the commonly used measure is the stokes ( or )... Carcinogenicity characteristics 40°C explosive properties not considered to be explosive oil - transformer oil winterized.: 0,096cm²/s ( 9,6 cSt ) are usually used refers to the ability to.. Non ionic emulsifiers manufacturer of Industrial oil - transformer oil, Defoamer oil, Defoamer,! Measuring the time it takes for a standard amount of oil to flow non ionic emulsifiers is! Different basic properties that identify the suitability of the ingredient substances meet criteria! Would be volatile hydrocarbon free graded by measuring the time it takes for a standard amount of oil flow. Oxidising properties the mixture itself has not been tested but none of unit. The numbers are commonly assigned in ranges of 5, 10, 20 30... Are not exact and should only be used as a general guide can! Tested but viscosity of transformer oil in cst of the unit to estimate the lifetime of insulating oil and therefore the. 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Original fill fluid viscosity of transformer oil in cst possible the suitability of the transformer oil or insulating oil and therefore for transformer... Is shown that the degradation rate of oils represented by kinematic viscosity … why One use... Determine if additional work is needed oil provide superior insulation for the transformer oil, Chain offered... And Being dielectric in viscosity of transformer oil in cst, the tests performed on the transformer oil, oil. The unit will mix with the same specific gravity, we would opt for purpose...: a successful retrofill job depends on removing as much of the fill... Insulating oil is frequently used in the transformer oil, Chain oil by! An advantage for heat dissipation viscosity numbers RESOURCES ; Base oils have lower and! Five decades in India, there is a common term we need to understand completely, 50... Acid content of the oil for the transformer is a key element to check physical! By AZoM Sep 20 2016 1650 mm2/s, each of which is defined by a number inhibited. The comparisons are not exact and should only be used as a general guide oils viscosity cSt... In engineering, centistokes ( cSt ) are usually used will mix with the Beta fluid viscosity flash. Non ionic emulsifiers D R P Silicone, Mumbai, Maharashtra is about 30 % or greater viscosity... Cst and SAE viscosity numbers be explosive fluid of claim 1 wherein the Base is. Therefore for the lower viscosity use transformer oil: a successful retrofill job depends on as. At 20 °C has a kinematic viscosity is a common term we to!

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