transformer oil testing
Water and gases are very damaging to your transformer insulation system and are two main cause of the oxidation process and oil aging process. 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. Expert transformer condition diagnostics backed by five decades of data-driven wisdom. Testing MIDEL 7131 and MIDEL eN. 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 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. RSYJ-80 Insulation Oil Dielectric Strength Tester AC 0~80kV Output Voltage. Transformer Oil Testing is a relatively simple and effective tool for determining the condition of the transformer fluid. Contamination of the oil is exhibited by poor transparency, cloudiness, or the observation of foreign particles. Dielectric tests. These tests are carried out during the maintenance and operation of the transformer. Useful for measuring changes within the insulating oil resulting from contamination or deterioration. 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. All our transformer oils are tested thoroughly to ensure they are capable of meeting these demands. If a winding shorts from turn to turn, or phase to phase, or phase to ground, arcing will occur and the transformer will fail. explore. A DGA test can identify an overloaded transformer by a test result showing high carbon monoxide, high carbon dioxide, and in extreme cases, even elevated methane and ethylene. A larger quantity of oil is needed for these tests. The transformer quality can be performed through the following tests. No single test alone will represent or indicate the true condition of the liquid. The “screen test” is a collection of physical, electrical and chemical transformer oil testing methods. For more information regarding transformer oil testing you can read our following article: Transformer Oil Testing: Types, Methods and Analysis. ALS performs several tests that allow for proper condition monitoring. To improve the cooling process, radiators or “fins” are installed on the side of a transformer. This paper reviews some of the transformer oil tests and there significance. 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. Arcing is the most severe condition in a transformer because it indicates a breakdown of the insulation. 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. Our testing procedure can be broken down into certain sectors. We are accredited from NABL for high voltage electrical transformer testing. This early warning system can allow management to identify maintenance priorities, plan work assignment schedules, and order necessary parts and materials. Analytical Testing. In extremely cold climates, specific gravity can be used to determine whether ice will float on the oil. RSBS-IV Transformer Oil Testing Equipment Moisture ≤80 %RH 0.1 Resolution Ratio. Transformer Oil Testing is a proven loss prevention technique that should be a part of any condition based predictive maintenance program. Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent electrical insulating properties. If the combustibles are stable and remain present, the transformer should be inspected at the next outage or downtime scheduled. 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. Routine test of transformer oil: This test of transformer oil is so important. Electrical and thermal stress or chemical contamination can cause failures and reduced component life. Detects the concentration level of polychlorinated biphenyls in transformer oil by gas chromatography. Routine testing of transformer oils and insulating oils on a regular schedule is an accepted industry practice. Power Transformers offers Transformer Oil testing, regeneration, recycling, purification and supply services for the full range of electrical transformers. Additional useful tests performed by transformer oil laboratories include those for water content, PCBs furanic compounds and metals-in-oil. The screen test is a collection of additional physical, electrical and chemical tests, including: dielectric breakdown, power factor, interfacial tension, acidity and color. The transformer turns ratio test is used to make sure that the ratio between the … It is therefore, essential to the life of the transformer to periodically monitor the condition of the insulating oil. The same can be said for transformer oils used to insulate many transformers and other electrical distribution equipment. Why transformer testing is required. RSBS-IV Transformer Oil Testing Equipment Moisture ≤80 %RH 0.1 Resolution Ratio. Transformer Oil Testing Transformer oils are subject to electrical and mechanical stresses while a transformer or other electrical distribution equipment is in operation. These tests include dielectric breakdown, power factor, inter-facial tension, acidity, and color. There are many benefits to using MIDEL fluids, such as 100% fire safety, environmental friendliness and low maintenance. Maintenance of substation transformers is often neglected, with potentially severe consequences. This means that every time you visit this website you will need to enable or disable cookies again. 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. The paper insulation which is normally used to insulate the windings of a transformer is a cellulose product. Transformer oil test methods include ASTM, BS,and other recognized transformer oil analysis testing procedures. It is a characteristic of the oil’s quality and purity and acidity. Oil is visually examined by passing a beam of light through it to determine transparency and identify foreign matters. 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. Our transformer oil testing services offer you a complete solution to your transformer testing needs. Early testing will set up a bottom line for contrast & yearly testing will design any changes inside the transformer. Insulating Oil(Transformer Oil) Testing is an essential part of any maintenance plan for the transformer. Measures the presence of soluble contaminants and oxidation products in transformer oil. A sample of transformer oil, taken correctly, can tell service engineers a great deal about the condition of a transformer. Skip to main content Call +1-800-655-4473 When new, transformer oil has a very light color and complies with performance standards that include dielectric strength and other important characteristics. SDMyers has the largest transformer oil testing lab in the world, with packages that test for every known fault condition. The power factor of insulating oil equals the cosine of the phase angle between an ac voltage applied and the resulting current. A similar process is used to calculate the oil’s “dissipation factor.” It is the the oil’s ability to neutralize energy, prevent breakthroughs and cool the transformer. As the insulating materials in a transformer break down due to thermal and electrical stresses, gaseous byproducts are formed. When the standards and principles stated by ASTM are followed, then it results in good oil. In a used oil it measures the amount remaining after oxidation has reduced its concentration. It also insulates the transformer and allows electrical components to be more compact than free air apparatus. Transformer oil acts as an electrical insulating media and helps protect the components. Because it can be define … Transformer oil testing is one of the important parts of a power transformer. The performance characteristics of transformer insulating oil are monitored and tested at several stages during its service life. Arcing can be generated in many areas of a transformer. 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. If a proactive approach is adopted based on the condition of the transformer oil, the life of the transformer can be extended. The byproducts are characteristic of the type of incipient-fault condition. Different gasses will dissolve in the oil that indicate various types of thermal and electrical stress occurring within the transformer. Transformer Oil Testing is a proven loss prevention technique which 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. Transformer excitation current test : 5 years. To evaluate the quality of the transformer oil testing, three steps are important to be carried out. Acid Number D974/ D664 Corona is considered to be partial discharge and occurs at areas of high electrical stress, such as at sharp points along an electrical path. Its use to call transformer oil and it a little bit pricey. In order to test the oil, we take several samples where the physical and chemical properties will be tested. Regular sampling and testing of insulation oil taken from transformers is a valuable technique in a preventative maintenance pr ogram. A normal and acceptable acid number is 0.25 mg KOH/g, while the limit of contaminant content is 515 parts per million (ppm). Higher values are indicative of a problem. 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. Oil level indicator operation : 5 years. Oil is used both to cool the transformer and to insulate internal components. Transformer oil testing is just like a blood test in the human body. Transformer Oil Sampling & Testing. Measures the electrical insulating properties of transformer oil under conditions comparable to those of the test. This test will be performed when your power transformer cooling system is an oil type. There are various factors in testing the oil and those are breakdown voltage, its properties, and many others. Transformer Oil Testing. So it has to go through numerous testing procedures. If the oil becomes contaminated or begins to oxidize and breakdown, the performance is compromised and the transformer can short out or worse. This test does not measure the water content in the transformer paper insulation. Indicates the lowest temperature at which the insulating oil will flow. FUNCTION INTRODUCTION 1. 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. Transformer oil testing and analysis is a cost-effective preventive maintenance tool for your electrical power system. 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. 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 keeps the transformer cool. Insulating oil – DGA, physical, and chemical tests : Anually. 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. Some transformer oil tests can be carried out in the field, using portable test apparatus. The oil pressure test on transformer to check against leakages past joints and gaskets is included. Other tests, such as dissolved gas, normally require a sample to be sent to a laboratory. This paper reviews some of the transformer oil tests and there significance. When arcing occurs in the area of the windings, the usual result is de-tanking of the transformer, and a rewind conducted. The more particles that are present in the oil, the faster the oil ages. In general, an increased dissipation factor means degradation of the oil’s dielectric capabilities. If the oil becomes contaminated or begins to oxidize and breakdown, the performance is compromised and the transformer can short out or worse. ALS provides a wide range of analytical services to monitor transformer operating condition and fluid health. Transformer Oil Testing Equipment. Full testing, sampling and analysis; Heat vacuum oil purification plant Transformer Oil Testing Equipment. Oil testing allows the operator to determine the equipment’s operating efficiency, conditions and the possibility of future malfunctions. 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. That means we have the capability and capacity to provide effective, accurate test results quickly. If you disable this cookie, we will not be able to save your preferences. We provide you with fast analyses to IEC, ASTM, and ISO standards, helping you identify issues quickly. Learn More. Used to observe darkening of the oil by comparing it to previous samples of oil from the same transformer. In some transformers, that meets the minimum operating standard. Sudden pressure relay . Special Tests of transformer include. If a transformer is overloaded for a long period of time, the deteriorating condition of the cellulose will shorten the life of the transformer. Dielectric breakdown voltage 2. This website uses cookies so that we can provide you with the best user experience possible. Transformer Oil Sampling. If the oil temperature falls below the pour point, transformer oil stops convection flowing and obstruct cooling in a transformer. Gas content is measured by an absorptiometric analyzer or a chromatographer. 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. Measured in ppm, it also applies to the determination of PCB present in mixtures known as askarels. 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. 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. A blood test provides a doctor with a wealth of information about the health of a patient. 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. 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 testing is done for confirming the specifications and performance of an electrical power transformer. So, insulation overheating measurement is also transformer oil testing methods. New transformer oils contain practically no acids. 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. 6. 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. Sampling for Dissolved Gas Analysis (DGA) requires a special sampling syringe, which ALS can help provide. Find here Transformer Oil Test Kit manufacturers & OEM manufacturers India. This early warning system can allow management to identify maintenance priorities, plan work assignment schedules, and order necessary parts and materials. Open all the valves of each accessory and component to the main body, so that all accessories except the oil conservator and gas relay (including the cooler and radiator) are connected to the transformer for vacuum pumping. 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