For mineral oil, a generally accepted maximum moisture content is 35 ppm. These services are performed by skilled and experienced transformer specialists, using … A decreasing value indicates an increase in contaminants and/or oxidation products within the oil. Heating may be caused by poor contacts on a tap changer, or loose connections on a bushing or a grounding strap, or circulating currents in the core due to an unintended core ground. Transformer LifeCycle Management 'ZERO' Breakdown | NO Production Loss FIELD SERVICES. If the oil becomes contaminated or begins to oxidize and breakdown, the performance is compromised and the transformer can short out or worse. The same can be said for transformer oils used to insulate many transformers and other electrical distribution equipment. Transformer oil analysis enables power generating companies to monitor the health of their transformers via oil testing, data analysis, and reporting. Determines the presence of degradation in cellulosic materials such as paper, pressboard, and cotton, which generate furanic compounds in the insulating oil. To improve the cooling process, radiators or “fins” are installed on the side of a transformer. Some of the most common tests for transformer oil are: Dissolved Gas In Oil Analysis, screen tests, water content, metals-in-oil, and polychlorinated biphenyl The oil treatment process is carried out using an oil filtration machine also known as insulating oil treatment plant or IOT. Servicing the oil before it becomes aggressive against the solid insulation is the key to extending the service life of your transformers. This website uses cookies to improve your experience. If conditions are not severe, the transformer should be monitored closely. Measurements are made by the amount of potassium hydroxide (KOH in mg) required to neutralize the acid in one gram of oil. Normally, arcing occurs only after other problems surface which show up through DGA testing. Welcome to NDL Power Limited, it is India's leading private laboratory for transformer oil testing. Gas content is measured by an absorptiometric analyzer or a chromatographer. This paper reviews some of the transformer oil tests and there significance. The oil pressure test on transformer to check against leakages past joints and gaskets is included. RSBS-IV Transformer Oil Testing Equipment Moisture ≤80 %RH 0.1 Resolution Ratio. The power factor of insulating oil equals the cosine of the phase angle between an ac voltage applied and the resulting current. 4. The insulating fluid in a power transformer performs two major functions: Serves as electrical insulation to withstand the high voltages inside the transformer The SDMyers transformer oil testing lab is the largest in the world. If the oil is fresh, the lowest allowable breakthrough voltage is 30 kV. Furan test is used to determine the life of a transformer and condition of transformer oil in transformer oil. Water and gases are very damaging to your transformer insulation system and are two main cause of the oxidation process and oil aging process. To gather the sample, a clean, moisture free container must be used — typically a 1 liter glass bottle. Please contact Intertek for more information. When the standards and principles stated by ASTM are followed, then it results in good oil. Measurements are made using high-performance liquid chromatography (HPLC). The heart of the transformer is the solid insulation, but the insulating oil is the life blood of the transformer. JY6611 transformer oil breakdown voltage tester use advanced voltage breakdown control technology which will keep breakdown energy in a very low level,that will avoid pollution to oil sample during testing and make sure the test result are accurate and reliable. Furan measures the degradation of cellulose paper. Transformer Oil Testing Equipment. oil type transformer maintenance. Transformers degrade over time, and failure to collect oil samples and conduct testing can allow problems to go undetected, causing increased operating costs and downtime. Electrical and thermal stress or chemical contamination can cause failures and reduced component life. Strictly Necessary Cookie should be enabled at all times so that we can save your preferences for cookie settings. Transformer Oil Testing. Transformer Oil Testing Transformer oils are subject to electrical and mechanical stresses while a transformer or other electrical distribution equipment is in operation. Transformer Oil Testing is a proven loss prevention technique which should be a part of any condition based predictive maintenance program. We'll assume you're ok with this, but you can opt-out if you wish. Furanic Compounds In Oil . Transformer oil testing is one of the important parts of a power transformer. Huazheng Electric Manufacturing (Baoding) Co.,Ltd is one of the leading transformer oil tester manufacturers China, welcome to import cheap and discount insulation oil testing, insulation oil tester, oil test equipment, oil analyzer, oil tester from us. Learn More. It is certified to ISO/IEC 17025 standard for chemical and biological testing and is as established as the transformer plant itself, having been in continuous operation for > 30 years. If the purity and quality standards are followed, the equipment will be less likely to experience failures and downtime and unscheduled maintenance and repair costs. Expert transformer condition diagnostics backed by five decades of data-driven wisdom. Measurement of zero­sequence impedance of three­phase transformers 3. Because it can be define … Its use to call transformer oil and it a little bit pricey. Sudden pressure relay . Partial discharge is commonly explained as being intermittent. Follow us to know more about # InsulatingOil. Routine test of transformer oil: This test of transformer oil is so important. New oil should have a minimum dielectric strength of 35 kV by ASTM Transformer Oil Testing Methods. It also insulates the transformer and allows electrical components to be more compact than free air apparatus. Measurement of zero-sequence impedance of three-phase transformers ; Short-circuit test; Measurement of acoustic noise … All our transformer oils are tested thoroughly to ensure they are capable of meeting these demands. This test indicates aging, quality and the presence of contaminants in the transformer oil. Oil Tests . Over the past five decades we have generated millions of test results from thousands of high-voltage units, and we process samples from transformer owners across the country. ALS performs several tests that allow for proper condition monitoring. For mineral oil, a generally accepted maximum moisture content is 35 ppm. 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 Oil Testing is a proven loss prevention technique which should be a part of any condition based predictive maintenance program. Measurement of the harmonics of the no­load current. Measures the electrical insulating properties of transformer oil under conditions comparable to those of the test. Manufacturer of Transformer Oil Test Kit [BDV] is engaged in the manufacturing of the Oil Test Kit, which are known as the microprocessor based test equipment. The oil that provides insulation and cooling properties for a transformer should be tested before the transformer is energized, and periodically as a part of a regular maintenance schedule. Dielectric tests. The transformer quality can be performed through the following tests. Expressed in mN/m, it is a test of interfacial tension of water against oil, which is different from surface tension in that the surface of the water is in contact with oil instead of air. Contamination of the oil is exhibited by poor transparency, cloudiness, or the observation of foreign particles. 5 years. See more video about transformer oil purification. These tests include dielectric breakdown, power factor, inter-facial tension, acidity, and color. Our labs cover the following: PCB in Oil per Gas Chromatography If conditions gets worse, and thermal combustibles elevate, the transformer will need to be taken out of service. Care should be taken when sampling transformer fluid and should be performed by a trained operator. Regular monitoring of the oil’s quality and condition is a part of the process of servicing electric power equipment. Indicates the lowest temperature at which the insulating oil will flow. Decreasing dielectric strength is caused by contamination of the oil by gas, moisture, cellulose fibers or other particulate matter. Measures the amount of 2,6-ditertiary-butyl paracresol and 2,6-ditertiary-butyl phenol that has been added to new insulating oil as protection against oxidation. Dissolved Gas Analysis is the single most important test performed on oils from transformers. Transformer oil test methods include ASTM, BS,and other recognized transformer oil analysis testing procedures. Transformer testing is done for confirming the specifications and performance of an electrical power transformer. Arcing is the most severe condition in a transformer because it indicates a breakdown of the insulation. Turns Ratio Testing. Transformer oil keeps the transformer cool. Our transformer oil testing services offer you a complete solution to your transformer testing needs. Acidic sludge forms in contaminated oil and aggressively attacks the cellulose insulation and reacts with the metals of the transformer’s other internal components. Corona is considered to be partial discharge and occurs at areas of high electrical stress, such as at sharp points along an electrical path. We have invested in the construction of industry leading infrastructure to allow us to service the full spectrum of requirements including:. See bigger list of transformer oil testing methods in the end of the article. Transformer oil acts as an electrical insulating media and helps protect the components. RSDDG Switchgear Testing Equipment for Current Load Test and Temperature Rise Test. Unsolved materials accumulated in the oil in the form of sludge or suspended particles (fibers, dust, solved paint, metal particles, ash etc) degrade the oil’s dielectric properties and promote oil oxidation. Analysis of gases in the oil can indicate insulation overheating/overloading, liquid overheating, partial discharge (corona), or arcing in the transformer. The oil pressure test on transformer to check against leakages past joints and gaskets is included. Short­circuit test. Manufacturer HZJQ-X1 Portable Transformer Oil Dielectric Strength Test Equipment. If a winding shorts from turn to turn, or phase to phase, or phase to ground, arcing will occur and the transformer will fail. The presence of solid particles in the oil and the acid number of the oil are two related oil purity characteristics. Transformer Oil Testing is a proven loss prevention technique that should be a part of any condition based predictive maintenance program. Measured by inductively coupled plasma atmonic emission spectrometry (ICP-AES) and expressed in micrometers. Specific transformer oil test method availability will vary depending upon location. If a transformer becomes overloaded for any reason, the windings will generate more heat and deteriorate the cellulose insulation. The acid number is expressed as milligrams of KOH required to neutralize all acids in a gram of oil and indicates the degree of oil aging. Transformer oil test methods include ASTM, BS,and other recognized transformer oil analysis testing procedures. When the fault is major, the production of decomposed gases are significant and they get collected in a Buchholz relay. At Oil check we have the capacity to test oil from an aged transformer whether it be for maintenance, checking for any carry over after an oil change, disposal or refurbishment for such PCBs; ensuring that your equipment is compliant with the European Directive 96/59/EC. Oil level indicator operation : 5 years. Technical complexities of transformers combined with high capital cost and long life expectancy pose unique decision-making challenges to asset managers. It is therefore prudent to periodically perform tests on the oil to determine whether it is capable of fulfilling its role as an insulant. We are accredited from NABL for high voltage electrical transformer testing. The ability of insulating oil to maintain its original performance characteristics during long term operation of electric equipment is referred to as “oil stability.”  If the electric power equipment has no defects and operates in accordance with design and expectations, the performance characteristics of new oil will change and degrade slower. Measures the presence of soluble contaminants and oxidation products in transformer oil. The breakdown voltage is that voltage at which sustained arcing takes place. Transformer Insulating Oil Test Methods (ASTM) A table of the most common ASTM … Dissolved Gas Analysis is the single most important test performed on oils from transformers. The color is not in itself an indication of any specific problem, but a dark color is usually an indication of aged and/or contaminated oil. 5. Moisture content in oil lowers the insulating system dielectric strength and allows flashover that can damage a transformer. A normal and acceptable acid number is 0.25 mg KOH/g, while the limit of contaminant content is 515 parts per million (ppm). The oil circulates through the transformer by natural convection. Electrical and thermal stress or chemical contamination can cause failures and reduced component life. This means that every time you visit this website you will need to enable or disable cookies again. A larger quantity of oil is needed for these tests. After all the accessories of the transformer are installed. The screen test is a collection of additional physical, electrical and chemical tests, including: dielectric breakdown, power factor, interfacial tension, acidity and color. This early warning system can allow maintenance management to identify maintenance priorities, plan work assignment schedules, arrange for outside service, and order necessary parts and materials. The dielectric breakdown voltage is measured by applying a voltage between two electrodes under the oil. Title: Microsoft Word - TROILANA.DOC Author: User Created Date: 6/15/2005 8:47:19 AM Working with MVA means you have selected a company experienced in all aspects of the transformer life cycle: from installation, to oil testing and diagnostics, to field repairs and oil maintenance. Transformer oil is crucial in the cooling process of a transformer. Power factor Six breakthroughs are achieved in the test and the last five are averaged. Oil testing allows the operator to determine the equipment’s operating efficiency, conditions and the possibility of future malfunctions. Oil Filtration Machine. For more information regarding transformer oil testing you can read our following article: Transformer Oil Testing: Types, Methods and Analysis. T. Measures the voltage at which the oil fails electrically, which is indicative of the amount of contaminant (usually moisture) in the oil. In general, an increased dissipation factor means degradation of the oil’s dielectric capabilities. A DGA test will indicate high thermal gases (methane, ethane and ethylene) as a result of overheating of the liquid. Whenever a transformer undergoes abnormal thermal and electrical stresses, certain gases are produced due to the decomposition of the transformer oil. Oil pressure test to check the leakages at joints and gaskets on the transformer; Special Tests. This early warning system can allow management to identify maintenance priorities, plan work assignment schedules, and order necessary parts and materials. Full testing, sampling and analysis; Heat vacuum oil purification plant We provide you with fast analyses to IEC, ASTM, and ISO standards, helping you identify issues quickly. Transformer Oil Sampling & Testing. Special Tests of transformer include. This test does not measure the water content in the transformer paper insulation. Transformer Oil Testing is a proven loss prevention technique that should be a part of any condition based predictive maintenance program. No single test alone will indicate the true condition of the liquid, so all the screen tests should be performed. RSDDG Switchgear Testing Equipment for Current Load Test and Temperature Rise Test. Transformer oil is not any ordinary oil. In a used oil it measures the amount remaining after oxidation has reduced its concentration. Without the life blood, the heart will die. This paper reviews some of the transformer oil tests and there significance. SDMyers has the largest transformer oil testing lab in the world, with packages that test for every known fault condition. Insulation breakdown in the windings, from coil to coil or coil to ground, will result in arcing. From the sampling, we are able to detect the moisture content, power factor, dielectric breakdown, acid number and much more. The degradation materials produce CO and CO2 gases. Inspection : Anually. Useful for measuring changes within the insulating oil resulting from contamination or deterioration. Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent electrical insulating properties. When arcing occurs in the area of the windings, the usual result is de-tanking of the transformer, and a rewind conducted. Therefore, it is suggested that they all be performed. Oil is used both to cool the transformer and to insulate internal components. It is well known that regular oil analysis is useful in monitoring the condition of engines, turbines and other oil lubricated equipment. Overheating of the liquid insulation is a slightly different problem in transformers and can be on of transformer oil testing methods. Remove a sample of insulating transformer oil in accordance with ASTM D-3613 and test shall be performed for dissolved gas analysis (DGA). ANSI/ IEEE C57.104 or ASTM D3612, NETA, ATS-Sec.7.2.2.2.11 Temperature devices shall be installed and verify setting and operation. Moisture content 3. Our testing procedure can be broken down into certain sectors. The condition of the oil, its purity and contamination level will greatly help in indicating the condition of the transformer’s solid insulation. It is used in oil-filled 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 serve as a coolant. A low resistivity reflects a high content of free ions and ion-forming particles in the insulating oil, and normally indicates a high concentration of conductive contaminates. There are many benefits to using MIDEL fluids, such as 100% fire safety, environmental friendliness and low maintenance. Skip to main content Call +1-800-655-4473 However, the high energy required to produce an arc will cause all combustibles to be elevated. By the Furan analysis, we check the condition of paper in transformer oil. ppm: Neutralization (Acid) number: D974: New transformer oils contain practically no acids. Indicates the volatility of insulating oil by measuring the minimum temperature at which the heated oil gives of sufficient vapor to form a flammable mixture with air. Reliable testing … Why transformer testing is required. New transformer oils contain practically no acids. Identifies various gas ppm levels that are present in transformer insulating oil. Transformer oil testing is one of the important parts of a power transformer.This test will be performed when your power transformer cooling system is an oil type. An oil sample tube and syringe is used to draw, retain and transport the oil sample in the same condition as it is inside a transformer with all fault gases dissolved in it. 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