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 transformer quality can be performed through the following tests. Electrical and thermal stress or chemical contamination can cause failures and reduced component life. For mineral oil, a generally accepted maximum moisture content is 35 ppm. GlobeCore uses test results to diagnose transformer problems. Short­circuit test. If the oil becomes contaminated or begins to oxidize and breakdown, the performance is compromised and the transformer can short out or worse. The byproducts are characteristic of the type of incipient-fault condition. Indicates the lowest temperature at which the insulating oil will flow. Additional useful tests performed by transformer oil laboratories include those for water content, PCBs furanic compounds and metals-in-oil. Our transformer oil testing services offer you a complete solution to your transformer testing needs. All our transformer oils are tested thoroughly to ensure they are capable of meeting these demands. Transformer Oil Testing is a proven loss prevention technique which should be a part of any condition based predictive maintenance program. 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. Our laboratories in Australia maintain ISO and NATA certification for quality assurance and expertise. Normally, arcing occurs only after other problems surface which show up through DGA testing. The insulating fluid in a power transformer performs two major functions: Serves as electrical insulation to withstand the high voltages inside the transformer RSYJ-80 Insulation Oil Dielectric Strength Tester AC 0~80kV Output Voltage. If the oil is fresh, the lowest allowable breakthrough voltage is 30 kV. When new, transformer oil has a very light color and complies with performance standards that include dielectric strength and other important characteristics. 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. Without the life blood, the heart will die. The oil pressure test on transformer to check against leakages past joints and gaskets is included. Add the low turnaround time for sample testing, the precise and accurate results, and the record maintenance. The degradation materials produce CO and CO2 gases. FUNCTION INTRODUCTION 1. The “screen test” is a collection of physical, electrical and chemical transformer oil testing methods. 5 years. The byproducts are characteristic of the type of incipient-fault condition. Turns Ratio Testing. For mineral oil, a generally accepted maximum moisture content is 35 ppm. Indicates the dielectric losses of the oil, or energy that is dissipated as heat. The power factor of insulating oil equals the cosine of the phase angle between an ac voltage applied and the resulting current. Transformer Oil Testing is a proven loss prevention technique that should be a part of any condition based predictive maintenance program. Transformer testing is done for confirming the specifications and performance of an electrical power transformer. 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. 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. +91-9818-555-952 ©2020 by NDL Power Limited. Furanic Compounds In Oil . Special Tests of transformer include. 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 Testing. Transformer Oil Testing Methods are key part of any maintenance program. It is therefore prudent to periodically perform tests on the oil to determine whether it is capable of fulfilling its role as an insulant. 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. Insulation breakdown in the windings, from coil to coil or coil to ground, will result in arcing. Other tests, such as dissolved gas, normally require a sample to be sent to a laboratory. Technical complexities of transformers combined with high capital cost and long life expectancy pose unique decision-making challenges to asset managers. RSBS-IV Transformer Oil Testing Equipment Moisture ≤80 %RH 0.1 Resolution Ratio. Transformer oil analysis enables power generating companies to monitor the health of their transformers via oil testing, data analysis, and reporting. The dielectric breakdown voltage is measured by applying a voltage between two electrodes under the oil. Analysis of gases in the oil can indicate insulation overheating/overloading, liquid overheating, partial discharge (corona), or arcing in the transformer. Transformer oil testing is just like a blood test in the human body. 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. 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. Useful for measuring changes within the insulating oil resulting from contamination or deterioration. Transformer Oil Testing. No single test alone will represent or indicate the true condition of the liquid. The same can be said for transformer oils used to insulate many transformers and other electrical distribution equipment. 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. Regular sampling and testing of insulation oil taken from transformers is a valuable technique in a preventative maintenance pr ogram. Transformer Oil Analysis for Maintenance Programs Anne Reygaerts, Laborelec. Measurement of zero-sequence impedance of three-phase transformers ; Short-circuit test; Measurement of acoustic noise … This test does not measure the water content in the transformer paper insulation. Strictly Necessary Cookie should be enabled at all times so that we can save your preferences for cookie settings. 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. Electrical and thermal stress or chemical contamination can cause failures and reduced component life. Transformer oil is a liquid that is stable at high temperatures and has excellent electrical insulating properties. In this article, we will examine the value and benefits of each test. Manufacturer HZJQ-X1 Portable Transformer Oil Dielectric Strength Test Equipment. 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. 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. Special Tests of transformer include 1. 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 a Transformer. Transformer oil test methods include ASTM, BS,and other recognized transformer oil analysis testing procedures. 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. Transformer oil is not any ordinary oil. See bigger list of transformer oil testing methods in the end of the article. Electrical and thermal stress or chemical contamination can cause failures and reduced component life. These tests are carried out during the maintenance and operation of the transformer. This test indicates aging, quality and the presence of contaminants in the transformer oil. Excitation Current. If conditions gets worse, and thermal combustibles elevate, the transformer will need to be taken out of service. Transformer Oil Testing is a proven loss prevention technique which should be a part of any condition- based predictive maintenance program. 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. Different gasses will dissolve in the oil that indicate various types of thermal and electrical stress occurring within the transformer. Top oil and winding thermometer. Transformer Oil Testing Equipment. A decreasing value indicates an increase in contaminants and/or oxidation products within the oil. 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. Electronic on-line dissolved gas detectors can be connected to important or distressed transformers to continually monitor gas generation trends. Actions that can be taken once a thermal gas problem is detected would depend on the severity of the problem. This allows us to certify our test results with authority that very few laboratories across India can match. 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. Analytical Testing. ⚙️ The guide below outlines all the essential tests to assess the quality and fitness of 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. Welcome to NDL Power Limited, it is India's leading private laboratory for transformer oil testing. RISING Transformer Oil Testing Equipment / Transformer Oil BDV Tester The acidity test measures the content of acids formed by oxidation and contaminates. ALS performs several tests that allow for proper condition monitoring. Transformer excitation current test : 5 years. For more information regarding transformer oil testing you can read our following article: Transformer Oil Testing: Types, Methods and Analysis. Title: Microsoft Word - TROILANA.DOC Author: User Created Date: 6/15/2005 8:47:19 AM RSYJ-80 Insulation Oil Dielectric Strength Tester AC 0~80kV Output Voltage. If you disable this cookie, we will not be able to save your preferences. Measurements are made using high-performance liquid chromatography (HPLC). Transformer oil testing and analysis is a cost-effective preventive maintenance tool for your electrical power system. Dissolved Gas Analysis is the single most important test performed on oils from transformers. When arcing occurs in the area of the windings, the usual result is de-tanking of the transformer, and a rewind conducted. So, insulation overheating measurement is also transformer oil testing methods. 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. Insulating oil – DGA, physical, and chemical tests : Anually. To improve the cooling process, radiators or “fins” are installed on the side of a transformer. Oil Filtration Machine. The oil circulates through the transformer by natural convection. Whenever a transformer undergoes abnormal thermal and electrical stresses, certain gases are produced due to the decomposition of the transformer oil. Sudden pressure relay . Each test is an indication of how suitable the insulation liquid is for service. New oil should have a minimum dielectric strength of 35 kV by ASTM Transformer Oil Testing Methods. Transformer oil acts as an electrical insulating media and helps protect the components. Power factor By the Furan analysis, we check the condition of paper in transformer 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. Inspection & Sampling In extremely cold climates, specific gravity can be used to determine whether ice will float on the oil. Results from such tests help guide planning for future maintenance on a transformer and help determine when replacement of a transformer may become necessary. No single test alone will indicate the true condition of the liquid, so all the screen tests should be performed. Doble test equipment is also used to conduct excitation current tests, which can … The SDMyers transformer oil testing lab is the largest in the world. Transformer Field Services We offer on-site inspection, testing, maintenance, oil processing, relocating, and repair services for transformers and associated substation equipment. This means that every time you visit this website you will need to enable or disable cookies again. Used to observe darkening of the oil by comparing it to previous samples of oil from the same transformer. This website uses cookies so that we can provide you with the best user experience possible. Title: Microsoft Word - TROILANA.DOC Author: User Created Date: 6/15/2005 8:47:19 AM The oil treatment process is carried out using an oil filtration machine also known as insulating oil treatment plant or IOT. 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. From the sampling, we are able to detect the moisture content, power factor, dielectric breakdown, acid number and much more. The more particles that are present in the oil, the faster the oil ages. RSDDG Switchgear Testing Equipment for Current Load Test and Temperature Rise Test. The oil pressure test on transformer to check against leakages past joints and gaskets is included. Our Transformer Oil Testing lab is NABL accredited. When the cellulose insulation breaks down to the point where arcing starts to occur, the transformer must be taken out of service. 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. The performance characteristics of transformer insulating oil are monitored and tested at several stages during its service life. 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. Measured in parts per million (ppm) using the weight of moisture divided by the weight of oil. The breakdown voltage is that voltage at which sustained arcing takes place. In some transformers, that meets the minimum operating standard. Oil testing allows the operator to determine the equipment’s operating efficiency, conditions and the possibility of future malfunctions. Dissolved Gas Analysis is the single most important test performed on oils from transformers. Overheating of the liquid insulation is a slightly different problem in transformers and can be on of transformer oil testing methods. Moisture and gas content in transformer oil must be tested for thoroughly. Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent electrical insulating properties. Servicing the oil before it becomes aggressive against the solid insulation is the key to extending the service life of your transformers. Measured by inductively coupled plasma atmonic emission spectrometry (ICP-AES) and expressed in micrometers. In addition, dissolved gases are extracted from the oil sample, separated, and quantified in a gas Chromatograph. A larger quantity of oil is needed for these tests. This early warning system can allow management to identify maintenance priorities, plan work assignment schedules, and order necessary parts and materials. Transformer oil keeps the transformer cool. Typically, results of 0.10 mg KOH/gram of oil or less are considered good. RSBS-IV Transformer Oil Testing Equipment Moisture ≤80 %RH 0.1 Resolution Ratio. Measures the electrical insulating properties of transformer oil under conditions comparable to those of the test. Transformer oil acts as an electrical insulating media and helps protect the components. Its use to call transformer oil and it a little bit pricey. Transformer Oil Testing is a proven loss prevention technique which should be a part of any condition based predictive maintenance program. Identifies any dissolved metals that could originate from overheating or arcing and a portion of the particulate metals that may originate from mechanical wear. 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. Transformer oil analysis is essential in accessing where on the system individual transformer units will likely fail. Measures the presence of soluble contaminants and oxidation products in transformer oil. Dielectric breakdown voltage 2. As the insulating materials in a transformer break down due to thermal and electrical stresses, gaseous byproducts are formed. Contaminated oil usually has a high ash content, increased acidity and presence of low molecular acids. 4. The transformer turns ratio test is used to make sure that the ratio between the … We provide you with fast analyses to IEC, ASTM, and ISO standards, helping you identify issues quickly. If the combustibles are stable and remain present, the transformer should be inspected at the next outage or downtime scheduled. Transformer Oil Testing is a proven loss prevention technique that should be a part of any condition based predictive maintenance program. These tests include dielectric breakdown, power factor, inter-facial tension, acidity, and color. In general, an increased dissipation factor means degradation of the oil’s dielectric capabilities. As the insulating materials in a transformer break down due to thermal and electrical stresses, gaseous byproducts are formed. Oil pressure test to check the leakages at joints and gaskets on the transformer; Special Tests. Acid Number D974/ D664 That means we have the capability and capacity to provide effective, accurate test results quickly. 1. Specific transformer oil test method availability will vary depending upon location. It is a characteristic of the oil’s quality and purity and acidity. If a transformer is overloaded for a long period of time, the deteriorating condition of the cellulose will shorten the life of the transformer. TRANSFORMER OIL ANALYSIS Emerald Transformer’s laboratories are capable of performing a variety of tests to determine the condition and status of your oil-filled electrical equipment. Furan test is used to determine the life of a transformer and condition of transformer oil in transformer oil. A high specific gravity indicates the oil’s ability to suspend water. Our testing procedure can be broken down into certain sectors. Care should be taken when sampling transformer fluid and should be performed by a trained operator. Identifies various gas ppm levels that are present in transformer insulating oil. The breakdown voltage is that voltage at which sustained arcing takes place. Transformer Oil Testing Equipment. Measurements are made by the amount of potassium hydroxide (KOH in mg) required to neutralize the acid in one gram of oil. A loose connection also may cause arcing, but of greater significance would be arcing due to insulation breakdown. explore. Our labs cover the following: PCB in Oil per Gas Chromatography 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. Learn More. Diagnostic testing, field maintenance & repairs. The screen test is a collection of additional physical, electrical and chemical tests, including: dielectric breakdown, power factor, interfacial tension, acidity and color. Moisture content in oil lowers the insulating system dielectric strength and allows flashover that can damage a transformer. 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. It also insulates the transformer and allows electrical components to be more compact than free air apparatus. It is well known that regular oil analysis is useful in monitoring the condition of engines, turbines and other oil lubricated equipment. Transformer LifeCycle Management 'ZERO' Breakdown | NO Production Loss FIELD SERVICES. Transformer Oil Analysis tests identify whether the insulating properties are acceptable by measuring degradation and contamination of the oil. (PCB) content. The presence of solid particles in the oil and the acid number of the oil are two related oil purity characteristics. Transformer Oil Testing Transformer oils are subject to electrical and mechanical stresses while a transformer or other electrical distribution equipment is in operation. Water and gases are very damaging to your transformer insulation system and are two main cause of the oxidation process and oil aging process. 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. Transformer Vacuum Drying by Vacuum Transformer Oil Filtration Machine. Routine test of transformer oil: This test of transformer oil is so important. In a used oil it measures the amount remaining after oxidation has reduced its concentration. The transformer’s fluid not only serves as a heat transfer medium, it also is part of the transformer’s insulation system. A sample of transformer oil, taken correctly, can tell service engineers a great deal about the condition of a transformer. 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