An Insulating Oil must have the following properties: 1) Excellent dielectric properties resulting in minimum power loss. 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. 2) High resistivity leading to better insulation values between windings. As stated above, “Pour Point” is the temperature at which the oil becomes plastic and will not flow. As the temperature increases, the density of the oil decreases. EDF Energy approached us to fill two new gen transformers within their power station in Heysham. Density: – The density of healthy transformer oil should be 0.89 gram per cubic centimeter at the temperature of 29.5 centigrade. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. I digitized one design for an example into a spreadsheet. How much money do you start with in monopoly revolution? This is because it tends to deteriorate over time. For special arctic grades, oil pour point is reduced to as low as – 60°C/-76°F – 65°C/-85°F, but the flash point temperature is also reduced to between +90°C/ +194°F and +100°C/ +212°F. From the standpoint of high dielectric strength, it is desirable to have a higher viscosity oil. Transformer oil temperature also has an effect on the density of transformer oil. 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. Kinematic viscosity for most oils at +20°C/+68°F is 28-30 × 10-6 m2 / s . Fresh oil should solidify at a temperature no greater than a pour point temperature of -45°C/-49°F. Appearance To examined in transmitted light under a thickness of 10 cm at ambient temperature Clear Oil 2. Operating oil is allowed a number of deviations from the curing temperature depending on whether the oil is used in a transformer or a switch, and whether it or operates indoors or outdoors. A good number of these properties are experimented upon by using the breakdown Pick the oil by density and viscosity that will give your transformer the most ideal scope of activity paying little heed to high or low-temperature boundaries. Anti-oxidant inhibitors have been found to greatly increase the effective service life of the insulating oil by slowing oxidation caused by acids and other harmful impurities giving rise to aggressive degradation of insulating paper. 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. 5 . 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. 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. This website uses cookies so that we can provide you with the best user experience possible. Transformer oils must be able to remain stable at high temperatures for long periods of times. 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. Paraffins 10-15 % Mineral-oil based transformer oil is composed of the materials listed in the Table below. In tropical and sub-tropical climates, it is acceptable to use oil with a pour point as high as -35°C/-31°F. 11001 - transformer oil revision date:may 2003 safety data sheet transformer oil 1. identification of the substance/preparation and the company: product name: transformer oil part no. Dielectric Dissipation Factor … 1. 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. Sulphur compounds < 1% Find here online price details of companies selling Transformer Oil. These have a pronounced affect on the function of the oil. The cleanliness class of the oil is allowed to down grade by one class after filling. Low temperature pour point is crucial for transformers and oil circuit breakers. to Transformer oils (insulating oils) to Properties of fluids. There are several properties of transformer oils. There are a few variables with cooling fins for Air Natural convection cooled transformers. Higher viscosity may mean better dielectric strength, but may reduce the ability of the oil to transfer heat and cool the transformer. Density of transformer oil depends on the manufacturer. 45#transformer Oil , Find Complete Details about 45#transformer Oil,Transformer Oil Name,Transformer Oil Density,Transformer Oil Msds from Lubricant Supplier or … Testing sequences and procedures are defined by various international standards, many of them set by ASTM. The density of transformer oil is usually in the range of (0.84-0.89) × 103 kg/m3. This website uses cookies to improve your experience. Get info of suppliers, manufacturers, exporters, traders of Transformer Oil for buying in India. source- Transformer Oil Density and Viscosity - ! Beneficial effects of the additives  The more effective the anti-oxidant additive is, the longer the oxidation induction period in the oil will be. 1, sample from the standpoint of high dielectric strength, it is the temperature,. 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