It also insulates the transformer and allows electrical components to be more compact than free air apparatus. The breakdown voltage is that voltage at which sustained arcing takes place. MVA is not just an oil laboratory—we are a full service diagnostic company using our expertise and knowledge to help you protect your transformers. 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. In a used oil it measures the amount remaining after oxidation has reduced its concentration. This test will be performed when your power transformer cooling system is an oil type. In addition, dissolved gases are extracted from the oil sample, separated, and quantified in a gas Chromatograph. +91-9818-555-952 ©2020 by NDL Power Limited. Oil Tests . Typically, results of 0.10 mg KOH/gram of oil or less are considered good. It is therefore prudent to periodically perform tests on the oil to determine whether it is capable of fulfilling its role as an insulant. The “screen test” is a collection of physical, electrical and chemical transformer oil testing methods. Because it can be define … 5. The screen test is a collection of additional physical, electrical and chemical tests, including: dielectric breakdown, power factor, interfacial tension, acidity and color. There are many benefits to using MIDEL fluids, such as 100% fire safety, environmental friendliness and low maintenance. Transformer Oil Testing is a proven loss prevention technique which should be a part of any condition-based predictive maintenance program. Decreasing dielectric strength is caused by contamination of the oil by gas, moisture, cellulose fibers or other particulate matter. The presence of acetylene is an indicator of arcing and so it’s one of the most important transformer oil testing methods; and even low levels of this gas should cause concern. Furan measures the degradation of cellulose paper. Breakdown Voltage BDV Testing of Transformer Oil. See bigger list of transformer oil testing methods in the end of the article. The power factor of insulating oil equals the cosine of the phase angle between an ac voltage applied and the resulting current. 6. Strictly Necessary Cookie should be enabled at all times so that we can save your preferences for cookie settings. Pour point of transformer oil is a valuable property mainly at the places where the climate is icy. The transformer oil laboratory is equipped with the latest test equipment to screen new as well as in-use transformer oil of both mineral and silicone type. This early warning system can allow management to identify maintenance priorities, plan work assignment schedules, and order necessary parts and materials. Transformer Oil Testing Equipment. Useful for measuring changes within the insulating oil resulting from contamination or deterioration. Acidic sludge forms in contaminated oil and aggressively attacks the cellulose insulation and reacts with the metals of the transformer’s other internal components. Expert transformer condition diagnostics backed by five decades of data-driven wisdom. The oil pressure test on transformer to check against leakages past joints and gaskets is included. The transformer turns ratio test is used to make sure that the ratio between the … For mineral oil, a generally accepted maximum moisture content is 35 ppm. Oil Filtration Machine. For additional information, contact our ALS laboratory in Sydney Australia. Timely oil monitoring and oil analysis programs can identify when the oil needs to be changed or serviced through an oil purification and/or oil regeneration process. Oil testing allows the operator to determine the equipment’s operating efficiency, conditions and the possibility of future malfunctions. Water and gases are very damaging to your transformer insulation system and are two main cause of the oxidation process and oil aging process. This test does not measure the water content in the transformer paper insulation. Doble test equipment is also used to conduct excitation current tests, which can … After all the accessories of the transformer are installed. Transformer oil testing is just like a blood test in the human body. Analytical Testing. Moisture and water content is measured as amount of hydrogen when reacting the oil with calcium hydride in a certain period of time. The transformer quality can be performed through the following tests. 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. Transformer Oil Testing is a relatively simple and effective tool for determining the condition of the transformer fluid. From the sampling, we are able to detect the moisture content, power factor, dielectric breakdown, acid number and much more. Transformer oil testing is one of the important parts of a power transformer. If the oil becomes contaminated or begins to oxidize and breakdown, the performance is compromised and the transformer can short out or worse. Power factor 1. 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 Transformer Oil Testing Methods are key part of any maintenance program. Indicates the lowest temperature at which the insulating oil will flow. This means that every time you visit this website you will need to enable or disable cookies again. Oil is visually examined by passing a beam of light through it to determine transparency and identify foreign matters. Find here Transformer Oil Test Kit manufacturers & OEM manufacturers India. The more particles that are present in the oil, the faster the oil ages. Other tests, such as dissolved gas, normally require a sample to be sent to a laboratory. Read More. This allows us to certify our test results with authority that very few laboratories across India can match. Routine test of transformer oil: This test of transformer oil is so important. Additional useful tests performed by transformer oil laboratories include those for water content, PCBs furanic compounds and metals-in-oil. Identifies various gas ppm levels that are present in transformer insulating oil. Oil pressure test to check the leakages at joints and gaskets on the transformer; Special Tests. Transformer oil is crucial in the cooling process of a transformer. The transformer is the main part of an electrical distribution system so if it is not working properly then it will affect the distribution system. Transformer oil is crucial in the cooling process of a transformer. Skip to main content Call +1-800-655-4473 Care should be taken when sampling transformer fluid and should be performed by a trained operator. Oil is used both to cool the transformer and to insulate internal components. We'll assume you're ok with this, but you can opt-out if you wish. However, the high energy required to produce an arc will cause all combustibles to be elevated. If the oil temperature falls below the pour point, transformer oil stops convection flowing and obstruct cooling in a transformer. Special Tests of transformer include. It is a characteristic of the oil’s quality and purity and acidity. Technical complexities of transformers combined with high capital cost and long life expectancy pose unique decision-making challenges to asset managers. Transformer Oil Testing Transformer oils are subject to electrical and mechanical stresses while a transformer or other electrical distribution equipment is in operation. If the oil is fresh, the lowest allowable breakthrough voltage is 30 kV. A sample of transformer oil, taken correctly, can tell service engineers a great deal about the condition of a transformer. The “dielectric breakdown test” is calculated as an average of five breakthroughs achieved in a standard discharger with two electrodes submersed in the oil at 2.5 mm distance from each other. 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. Insulating Oil(Transformer Oil) Testing is an essential part of any maintenance plan for the transformer. Transformer Oil Sampling & Testing. RSBS-IV Transformer Oil Testing Equipment Moisture ≤80 %RH 0.1 Resolution Ratio. 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. By the Furan analysis, we check the condition of paper in transformer oil. To evaluate the quality of the transformer oil testing, three steps are important to be carried out. Dielectric tests. ALS performs several tests that allow for proper condition monitoring. 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The presence of solid particles in the oil and the acid number of the oil are two related oil purity characteristics. ALS provides a wide range of analytical services to monitor transformer operating condition and fluid health. When arcing occurs in the area of the windings, the usual result is de-tanking of the transformer, and a rewind conducted. Our labs cover the following: PCB in Oil per Gas Chromatography Our transformer oil testing services offer you a complete solution to your transformer testing needs. Our Transformer Oil Testing lab is NABL accredited. Add the low turnaround time for sample testing, the precise and accurate results, and the record maintenance. The byproducts are characteristic of the type of incipient-fault condition. 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. Transformer Vacuum Drying by Vacuum Transformer Oil Filtration Machine. Partial discharge is commonly explained as being intermittent. Full testing, sampling and analysis; Heat vacuum oil purification plant Six breakthroughs are achieved in the test and the last five are averaged. No single test alone will indicate the true condition of the liquid, so all the screen tests should be performed. Dielectric tests. Dielectric breakdown voltage; e.g., D 877, ASTM D1816, Oxidation inhibitor content; e.g., ASTM D2668, Polychlorinated biphenyls content; e.g., ASTM D4059, Relative density (specific gravity); e.g., D 1298, ASTM D1524. In general, an increased dissipation factor means degradation of the oil’s dielectric capabilities. The SDMyers transformer oil testing lab is the largest in the world. RSYJ-80 Insulation Oil Dielectric Strength Tester AC 0~80kV Output Voltage. Power Transformers offers Transformer Oil testing, regeneration, recycling, purification and supply services for the full range of electrical transformers. A portion of the insulation may deteriorate until it can no longer contain the stress of the electrical conductor. Contaminated oil usually has a high ash content, increased acidity and presence of low molecular acids. This website uses cookies so that we can provide you with the best user experience possible. In this article, we will examine the value and benefits of each test. Its use to call transformer oil and it a little bit pricey. Dissolved Gas Analysis is the single most important test performed on oils from transformers. The degradation materials produce CO and CO2 gases. A blood test provides a doctor with a wealth of information about the health of a patient. Electrical and thermal stress or chemical contamination can cause failures and reduced component life. Indicates the dielectric losses of the oil, or energy that is dissipated as heat. SDMyers has the largest transformer oil testing lab in the world, with packages that test for every known fault condition. The transformer’s fluid not only serves as a heat transfer medium, it also is part of the transformer’s insulation system. Transformer Oil Testing Equipment. It is therefore, essential to the life of the transformer to periodically monitor the condition of the insulating oil. The oil’s flashpoint and the oil’s setting point are two indications of the general fire safety of the oil and the oil’s ability to operate in adverse temperature conditions both hot and cold. 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. For mineral oil, the power factor of new oil should not exceed 0.05 percent at 25 degrees C. Determines the density, relative density (specific gravity), or API gravity of transformer oil by use of hydrometer at a reference temperature. Megger provides laboratory grade oil test equipment, backed by experience reaching back to the early 20th century, to test these fundamental characteristics of insulating oil. That means we have the capability and capacity to provide effective, accurate test results quickly. Special tests help to provide useful information to the user. 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. All our transformer oils are tested thoroughly to ensure they are capable of meeting these demands. Electrical and thermal stress or chemical contamination can cause failures and reduced component life. A larger quantity of oil is needed for these tests. The main physical and chemical properties tested in Transformer Oil Testing Methods are the oil’s dielectric strength, dissipation factor, flashpoint, color, amount of solid particulate matter, water content, gas content and the oil’s acid number. Acid Number D974/ D664 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. Insulating oil – DGA, physical, and chemical tests : Anually. Our laboratories in Australia maintain ISO and NATA certification for quality assurance and expertise. 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. ppm: Neutralization (Acid) number: D974: New transformer oils contain practically no acids. Transformer Oil Testing is a proven loss prevention technique that should be a part of any condition based predictive maintenance program. Early testing will set up a bottom line for contrast & yearly testing will design any changes inside the transformer. If conditions are not severe, the transformer should be monitored closely. Learn More. In extremely cold climates, specific gravity can be used to determine whether ice will float on the oil. 4. Dielectric breakdown voltage 2. Follow us to know more about # InsulatingOil. A good oil analysis program provides equipment owners the ability to determine the current condition of a transformer and schedule prevetive maintenance so as to avoid possible failures in future. We provide you with fast analyses to IEC, ASTM, and ISO standards, helping you identify issues quickly. 5 years. That means Routine tests of transformer include all the type tests except temperature rise and vacuum tests. In order to test the oil, we take several samples where the physical and chemical properties will be tested. Transformer Oil Testing is a proven loss prevention technique which should be a part of any condition based predictive maintenance program. Transformer oil has to be tested to make sure that the performance and efficiency of the transformer are good. Transformer oil keeps the transformer cool. These services are performed by skilled and experienced transformer specialists, using … 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. Whenever a transformer undergoes abnormal thermal and electrical stresses, certain gases are produced due to the decomposition of the transformer oil. It also insulates the transformer and allows electrical components to be more compact than free air apparatus. Get Contact details & address of companies manufacturing and supplying Transformer Oil Test Kit across India. Our testing procedure can be broken down into certain sectors. Title: Microsoft Word - TROILANA.DOC Author: User Created Date: 6/15/2005 8:47:19 AM The paper insulation which is normally used to insulate the windings of a transformer is a cellulose product. Therefore, it is suggested that they all be performed. Transformer oil testing consists of measuring breakdown voltage and other physical and chemical properties of samples of the oil, either in a laboratory or using portable test equipment on-site. 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. Our transformer oil testing services offer you a complete solution to your transformer testing needs. A decreasing value indicates an increase in contaminants and/or oxidation products within the oil. RSDDG Switchgear Testing Equipment for Current Load Test and Temperature Rise Test. The performance characteristics of transformer insulating oil are monitored and tested at several stages during its service life. Normally, arcing occurs only after other problems surface which show up through DGA testing. A normal and acceptable acid number is 0.25 mg KOH/g, while the limit of contaminant content is 515 parts per million (ppm). Different gasses will dissolve in the oil that indicate various types of thermal and electrical stress occurring within the transformer. Please contact Intertek for more information. Oil level indicator operation : 5 years. As the insulating materials in a transformer break down due to thermal and electrical stresses, gaseous byproducts are formed. Routine testing of transformer oils and insulating oils on a regular schedule is an accepted industry practice. Sudden pressure relay . This paper reviews some of the transformer oil tests and there significance. Transformer testing is done for confirming the specifications and performance of an electrical power transformer. Transformer Oil Analysis for Maintenance Programs Anne Reygaerts, Laborelec. This test is particularly useful in cold climates to ensure that the oil will circulate and serve its purpose as an insulating and cooling medium. Diagnostic testing, field maintenance & repairs. Specific transformer oil test method availability will vary depending upon location. Transformer LifeCycle Management 'ZERO' Breakdown | NO Production Loss FIELD SERVICES. 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. Why transformer testing is required. Short­circuit test. T. Measures the voltage at which the oil fails electrically, which is indicative of the amount of contaminant (usually moisture) in the oil. New oil should have a minimum dielectric strength of 35 kV by ASTM Transformer Oil Testing Methods. 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. See more video about transformer oil purification. Sampling for Dissolved Gas Analysis (DGA) requires a special sampling syringe, which ALS can help provide. During the course of the oil’s service life, the stability of the oil decreases and visible changes occur and oil’s color slowly becomes darker and darker. Tests that are concerned with the immediate condition and acceptability of the insulating oil include dielectric breakdown tests, moisture measurement by the Karl Fischer (KF) method, and dielectric dissipation factor. If a transformer is overloaded for a long period of time, the deteriorating condition of the cellulose will shorten the life 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. 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. WATER CONTENT Test Method IEC 814 Water, in minute quantities, is harmful in power equipment because it is attracted to the places of greatest electrical stress and this is where it is the most dangerous. 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. Dissolved gas analysis (DGA) is the study of dissolved gases in transformer oil.It is also referred to as a DGA test. Testing MIDEL 7131 and MIDEL eN. If conditions gets worse, and thermal combustibles elevate, the transformer will need to be taken out of service. Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent electrical insulating properties. As the insulating materials in a transformer break down due to thermal and electrical stresses, gaseous byproducts are formed. oil type transformer maintenance. Title: Microsoft Word - TROILANA.DOC Author: User Created Date: 6/15/2005 8:47:19 AM Transformer oil acts as an electrical insulating media and helps protect the components. Transformer Oil Testing is a proven loss prevention technique which should be a part of any condition- based predictive maintenance program. Learn More. (PCB) content. Measurements are made by the amount of potassium hydroxide (KOH in mg) required to neutralize the acid in one gram of oil. 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. Transformer Oil Testing is a proven loss prevention technique which should be a part of any condition based predictive maintenance program. The acidity test measures the content of acids formed by oxidation and contaminates. Results from such tests help guide planning for future maintenance on a transformer and help determine when replacement of a transformer may become necessary. Its use to call transformer oil and it a little bit pricey. Measurement of the harmonics of the no­load current. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful. This paper reviews some of the transformer oil tests and there significance. If a proactive approach is adopted based on the condition of the transformer oil, the life of the transformer can be extended. 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. Breakdown Voltage BDV Testing of Transformer Oil. Transformer oil is not any ordinary oil. If the combustibles are stable and remain present, the transformer should be inspected at the next outage or downtime scheduled. Contamination of the oil is exhibited by poor transparency, cloudiness, or the observation of foreign particles. These tests are carried out during the maintenance and operation of the transformer. explore. Typical motor oil that most people think of, is not the type of oil in a transformer. Reliable testing … The color of transformer oil changes from light yellow to cloudy brown under the influence of temperature, contaminants and electric current. These tests include dielectric breakdown, power factor, inter-facial tension, acidity, and color. ⚙️ The guide below outlines all the essential tests to assess the quality and fitness of insulating oil. 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. 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. Top oil and winding thermometer. The insulating fluid in a power transformer performs two major functions: Serves as electrical insulation to withstand the high voltages inside the transformer Regular monitoring of the oil’s quality and condition is a part of the process of servicing electric power equipment. The oil treatment process is carried out using an oil filtration machine also known as insulating oil treatment plant or IOT. Used to observe darkening of the oil by comparing it to previous samples of oil from the same transformer. 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. Indicates a breakdown of the transformer is exhibited by poor transparency, cloudiness, or the observation of foreign.. 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And ISO standards, helping you identify issues quickly without the life of the.. Distinct advantages of testing and analyzing transformer oil testing services offer you a complete to. An electrical power system gas generation trends and long life expectancy pose unique challenges! For additional information, contact our als laboratory in Sydney Australia and fluid health as insulating (... Can no longer contain the stress of the transformer are installed on the oil becomes or! Transformer include all the essential tests to assess the quality of the oil with hydride. Point where arcing starts to occur, the transformer oil testing equipment ≤80. Supply services for the full range of analytical services to monitor transformer operating and., plan work assignment schedules, and other recognized transformer oil filtration machine known... But of greater significance would be arcing due to insulation breakdown an absorptiometric analyzer or a.! 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This means that every time you visit this website you will need to be tested thoroughly!