Transformer Oil Testing is a proven loss prevention technique which should be a part of any condition based predictive maintenance program. Insulation breakdown in the windings, from coil to coil or coil to ground, will result in arcing. New transformer oils contain practically no acids. If the oil temperature falls below the pour point, transformer oil stops convection flowing and obstruct cooling in a transformer. When the cellulose insulation breaks down to the point where arcing starts to occur, the transformer must be taken out of service. Arcing is the most severe condition in a transformer because it indicates a breakdown of the insulation. 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. A portion of the insulation may deteriorate until it can no longer contain the stress of the electrical conductor. Contamination of the oil is exhibited by poor transparency, cloudiness, or the observation of foreign particles. Why transformer testing is required. The acidity test measures the content of acids formed by oxidation and contaminates. RISING Transformer Oil Testing Equipment / Transformer Oil BDV Tester RSBS-IV Transformer Oil Testing Equipment Moisture ≤80 %RH 0.1 Resolution Ratio. Learn More. ⚙️ The guide below outlines all the essential tests to assess the quality and fitness of insulating oil. 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. 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. An annual DGA is the most important test for liquid insulation. RSBS-IV Transformer Oil Testing Equipment Moisture ≤80 %RH 0.1 Resolution Ratio. Pour Point of Transformer Oil It is the minimum temperature at which oil starts to flow under standard test condition. 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. In general, an increased dissipation factor means degradation of the oil’s dielectric capabilities. 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. 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. 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. Transformer oil test methods include ASTM, BS,and other recognized transformer oil analysis testing procedures. In some transformers, that meets the minimum operating standard. 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. Doble test equipment is also used to conduct excitation current tests, which can … Designed by experts, these Oil Test Sets are subjected to provide complete satisfaction to the clients. 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. 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. Identifies various gas ppm levels that are present in transformer insulating oil. That means we have the capability and capacity to provide effective, accurate test results quickly. Top oil and winding thermometer. Technical complexities of transformers combined with high capital cost and long life expectancy pose unique decision-making challenges to asset managers. This test does not measure the water content in the transformer paper insulation. Specific transformer oil test method availability will vary depending upon location. 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. 2. 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. T. Measures the voltage at which the oil fails electrically, which is indicative of the amount of contaminant (usually moisture) in the oil. Transformer Oil Sampling & Testing. Transformer Oil Testing is a proven loss prevention technique that should be a part of any condition based predictive maintenance program. If the combustibles are stable and remain present, the transformer should be inspected at the next outage or downtime scheduled. Early testing will set up a bottom line for contrast & yearly testing will design any changes inside the transformer. 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. That means Routine tests of transformer include all the type tests except temperature rise and vacuum tests. 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. 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. Higher values are indicative of a problem. The power factor of insulating oil equals the cosine of the phase angle between an ac voltage applied and the resulting current. 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 RSDDG Switchgear Testing Equipment for Current Load Test and Temperature Rise Test. Oil Filtration Machine. 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. 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. The performance characteristics of transformer insulating oil are monitored and tested at several stages during its service life. Transformer testing is done for confirming the specifications and performance of an electrical power transformer. RSYJ-80 Insulation Oil Dielectric Strength Tester AC 0~80kV Output Voltage. +91-9818-555-952 ©2020 by NDL Power Limited. Moisture content in oil lowers the insulating system dielectric strength and allows flashover that can damage a transformer. 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. Title: Microsoft Word - TROILANA.DOC Author: User Created Date: 6/15/2005 8:47:19 AM Maintenance of substation transformers is often neglected, with potentially severe consequences. RISING Transformer Oil Testing Equipment / Transformer Oil BDV Tester Regular sampling and testing of insulation oil taken from transformers is a valuable technique in a preventative maintenance pr ogram. Contaminated oil usually has a high ash content, increased acidity and presence of low molecular acids. These tests include dielectric breakdown, power factor, inter-facial tension, acidity, and color. Dielectric strength is one of the most important indications of oil stability and this is often the first test performed. Care should be taken when sampling transformer fluid and should be performed by a trained operator. Water and gases are very damaging to your transformer insulation system and are two main cause of the oxidation process and oil aging process. So, insulation overheating measurement is also transformer oil testing methods. 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. Electronic on-line dissolved gas detectors can be connected to important or distressed transformers to continually monitor gas generation trends. Transformer Oil Testing is a relatively simple and effective tool for determining the condition of the transformer fluid. 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. If a proactive approach is adopted based on the condition of the transformer oil, the life of the transformer can be extended. 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. In extremely cold climates, specific gravity can be used to determine whether ice will float on the oil. RSYJ-80 Insulation Oil Dielectric Strength Tester AC 0~80kV Output Voltage. Oil is visually examined by passing a beam of light through it to determine transparency and identify foreign matters. 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. Our testing procedure can be broken down into certain sectors. Measurement of zerosequence impedance of threephase transformers 3. We have invested in the construction of industry leading infrastructure to allow us to service the full spectrum of requirements including:. Furan measures the degradation of cellulose paper. Typically, results of 0.10 mg KOH/gram of oil or less are considered good. Moisture and water content is measured as amount of hydrogen when reacting the oil with calcium hydride in a certain period of time. Because it can be define … 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. Insulating oil – DGA, physical, and chemical tests : Anually. 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. These services are performed by skilled and experienced transformer specialists, using … Follow us to know more about # InsulatingOil. Decreasing dielectric strength is caused by contamination of the oil by gas, moisture, cellulose fibers or other particulate matter. Transformer Oil Sampling. If conditions are not severe, the transformer should be monitored closely. Measured by inductively coupled plasma atmonic emission spectrometry (ICP-AES) and expressed in micrometers. 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. A DGA test will indicate high thermal gases (methane, ethane and ethylene) as a result of overheating of the liquid. Transformer oil has to be tested to make sure that the performance and efficiency of the transformer are good. 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). Add the low turnaround time for sample testing, the precise and accurate results, and the record maintenance. If a transformer becomes overloaded for any reason, the windings will generate more heat and deteriorate the cellulose insulation. Results from such tests help guide planning for future maintenance on a transformer and help determine when replacement of a transformer may become necessary. Actions that can be taken once a thermal gas problem is detected would depend on the severity of the problem. We are accredited from NABL for high voltage electrical transformer testing. When the fault is major, the production of decomposed gases are significant and they get collected in a Buchholz relay. Title: Microsoft Word - TROILANA.DOC Author: User Created Date: 6/15/2005 8:47:19 AM Six breakthroughs are achieved in the test and the last five are averaged. Transformer oil testing and analysis is a cost-effective preventive maintenance tool for your electrical power system. In this article, we will examine the value and benefits of each test. For mineral oil, a generally accepted maximum moisture content is 35 ppm. Skip to main content Call +1-800-655-4473 A larger quantity of oil is needed for these tests. Transformer oil testing is just like a blood test in the human body. Analysis of gases in the oil can indicate insulation overheating/overloading, liquid overheating, partial discharge (corona), or arcing in the transformer. Our laboratories in Australia maintain ISO and NATA certification for quality assurance and expertise. If you disable this cookie, we will not be able to save your preferences. To improve the cooling process, radiators or “fins” are installed on the side of a transformer. Inspection : Anually. Transformer Oil Analysis tests identify whether the insulating properties are acceptable by measuring degradation and contamination of the oil. A blood test provides a doctor with a wealth of information about the health of a patient. Measured in parts per million (ppm) using the weight of moisture divided by the weight of oil. It is a characteristic of the oil’s quality and purity and acidity. Measured in ppm, it also applies to the determination of PCB present in mixtures known as askarels. Moisture and gas content in transformer oil must be tested for thoroughly. Transformer Oil Testing is a proven loss prevention technique which should be a part of any condition-based predictive maintenance program. 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. Transformer Oil Testing is a proven loss prevention technique which should be a part of any condition based predictive maintenance program. The breakdown voltage is that voltage at which sustained arcing takes place. Transformer Oil Testing Equipment. Breakdown Voltage BDV Testing of Transformer Oil. This means that every time you visit this website you will need to enable or disable cookies again. Determines the presence of degradation in cellulosic materials such as paper, pressboard, and cotton, which generate furanic compounds in the insulating oil. Some transformer oil tests can be carried out in the field, using portable test apparatus. 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. Measurements are made using high-performance liquid chromatography (HPLC). Please contact Intertek for more information. Transformer oil test methods include ASTM, BS,and other recognized transformer oil analysis testing procedures. It is well known that regular oil analysis is useful in monitoring the condition of engines, turbines and other oil lubricated equipment. Electrical and thermal stress or chemical contamination can cause failures and reduced component life. Electrical and thermal stress or chemical contamination can cause failures and reduced component life. explore. In addition, dissolved gases are extracted from the oil sample, separated, and quantified in a gas Chromatograph. Transformer oil analysis is essential in accessing where on the system individual transformer units will likely fail. Manufacturer HZJQ-X1 Portable Transformer Oil Dielectric Strength Test Equipment. 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. 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. Detects the concentration level of polychlorinated biphenyls in transformer oil by gas chromatography. Full testing, sampling and analysis; Heat vacuum oil purification plant As the insulating materials in a transformer break down due to thermal and electrical stresses, gaseous byproducts are formed. Testing of transformer oil is mandatory in yearly once for its maintenance. We provide you with fast analyses to IEC, ASTM, and ISO standards, helping you identify issues quickly. The condition of the oil, its purity and contamination level will greatly help in indicating the condition of the transformer’s solid insulation. 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. 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. The byproducts are characteristic of the type of incipient-fault condition. If the oil is fresh, the lowest allowable breakthrough voltage is 30 kV. Special Tests of transformer include. Transformer Oil Testing. Whenever a transformer undergoes abnormal thermal and electrical stresses, certain gases are produced due to the decomposition of the transformer oil. Dielectric tests. Servicing the oil before it becomes aggressive against the solid insulation is the key to extending the service life of your transformers. Oil Tests . The color of transformer oil changes from light yellow to cloudy brown under the influence of temperature, contaminants and electric current. 6. However, the high energy required to produce an arc will cause all combustibles to be elevated. Measurements are made by the amount of potassium hydroxide (KOH in mg) required to neutralize the acid in one gram of oil. Furanic Compounds In Oil . Specific transformer oil test method availability will vary depending upon location. 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. 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. To evaluate the quality of the transformer oil testing, three steps are important to be carried out. Breakdown Voltage BDV Testing of Transformer Oil. There are various factors in testing the oil and those are breakdown voltage, its properties, and many others. Insulating Oil(Transformer Oil) Testing is an essential part of any maintenance plan for the transformer. Transformer oil keeps the transformer cool. Expert transformer condition diagnostics backed by five decades of data-driven wisdom. In a used oil it measures the amount remaining after oxidation has reduced its concentration. Transformer excitation current test : 5 years. This paper reviews some of the transformer oil tests and there significance. Our labs cover the following: PCB in Oil per Gas Chromatography Get Contact details & address of companies manufacturing and supplying Transformer Oil Test Kit across India. Routine testing of transformer oils and insulating oils on a regular schedule is an accepted industry practice. Special tests help to provide useful information to the user. Sudden pressure relay . The byproducts are characteristic of the type of incipient-fault condition. Transformer Field Services We offer on-site inspection, testing, maintenance, oil processing, relocating, and repair services for transformers and associated substation equipment. Measurement of acoustic noise level. 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. ppm: Neutralization (Acid) number: D974: New transformer oils contain practically no acids. Measurement of zero-sequence impedance of three-phase transformers ; Short-circuit test; Measurement of acoustic noise … Transformer Oil Testing Equipment. The SDMyers transformer oil testing lab is the largest in the world. ALS can be a partner to help maximize your equipment reliability performance. Special Tests of transformer include 1. Indicates the lowest temperature at which the insulating oil will flow. Analytical Testing. Electrical and thermal stress or chemical contamination can cause failures and reduced component life. Moisture content 3. So it has to go through numerous testing procedures. 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. Indicates the dielectric losses of the oil, or energy that is dissipated as heat. The paper insulation which is normally used to insulate the windings of a transformer is a cellulose product. 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. A sample of transformer oil, taken correctly, can tell service engineers a great deal about the condition of a transformer. Power factor See more video about transformer oil purification. This early warning system can allow management to identify maintenance priorities, plan work assignment schedules, and order necessary parts and materials. Other tests, such as dissolved gas, normally require a sample to be sent to a laboratory. Learn More. ALS performs several tests that allow for proper condition monitoring. For mineral oil, a generally accepted maximum moisture content is 35 ppm. Our transformer oil testing services offer you a complete solution to your transformer testing needs. This test does not measure the water content in the transformer paper insulation. New oil should have a minimum dielectric strength of 35 kV by ASTM Transformer Oil Testing Methods. 5. It is therefore, essential to the life of the transformer to periodically monitor the condition of the insulating oil. Read More. 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. This allows us to certify our test results with authority that very few laboratories across India can match. It is therefore prudent to periodically perform tests on the oil to determine whether it is capable of fulfilling its role as an insulant. Partial discharge is commonly explained as being intermittent. Normally, arcing occurs only after other problems surface which show up through DGA testing. If a winding shorts from turn to turn, or phase to phase, or phase to ground, arcing will occur and the transformer will fail. For more information regarding transformer oil testing you can read our following article: Transformer Oil Testing: Types, Methods and Analysis. If conditions gets worse, and thermal combustibles elevate, the transformer will need to be taken out of service. 4. By the Furan analysis, we check the condition of paper in transformer oil. Transformer oil is crucial in the cooling process of a transformer. oil type transformer maintenance. The are distinct advantages of testing and analyzing transformer oil before starting your electric power equipment and during scheduled maintenance events. No single test alone will indicate the true condition of the liquid, so all the screen tests should be performed. When new, transformer oil has a very light color and complies with performance standards that include dielectric strength and other important characteristics. We'll assume you're ok with this, but you can opt-out if you wish. To gather the sample, a clean, moisture free container must be used — typically a 1 liter glass bottle. 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. The presence of solid particles in the oil and the acid number of the oil are two related oil purity characteristics. 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. Transformer LifeCycle Management 'ZERO' Breakdown | NO Production Loss FIELD SERVICES. Transformer oil is not any ordinary oil. Gas content is measured by an absorptiometric analyzer or a chromatographer. SDMyers has the largest transformer oil testing lab in the world, with packages that test for every known fault condition. 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. Oil is used both to cool the transformer and to insulate internal components. Please contact Intertek for more information. Measurement of the harmonics of the noload current. Transformer Oil Testing is a proven loss prevention technique that should be a part of any condition based predictive maintenance program. Power Transformers offers Transformer Oil testing, regeneration, recycling, purification and supply services for the full range of electrical transformers. Its use to call transformer oil and it a little bit pricey. 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. Reliable testing … If the arc occurs in the area of cellulose insulation, carbon dioxide and carbon monoxide also will be elevated. The oil circulates through the transformer by natural convection. Welcome to NDL Power Limited, it is India's leading private laboratory for transformer oil testing. Transformer oil analysis enables power generating companies to monitor the health of their transformers via oil testing, data analysis, and reporting. A decreasing value indicates an increase in contaminants and/or oxidation products within the oil. Typical motor oil that most people think of, is not the type of oil in a transformer. 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. In order to test the oil, we take several samples where the physical and chemical properties will be tested. The heart of the transformer is the solid insulation, but the insulating oil is the life blood of the transformer. Without the life blood, the heart will die. Transformer oil keeps the transformer cool. The “screen test” is a collection of physical, electrical and chemical transformer oil testing methods. 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Aging process Load test and the transformer by natural convection in oil lowers the insulating materials in transformer..., or energy that is dissipated as heat mva is not just oil! The presence of low molecular acids the pour point of transformer oil fluids, such as %... Annual DGA is the most severe condition in a used oil it measures content! Below the pour point of transformer oil under conditions comparable to those of the oil is the most condition! ( DGA ) requires a special sampling syringe, which als can be broken down into certain sectors or to. Remove a sample of transformer oils used to determine whether it is that. Knowledge to help maximize your equipment reliability performance arcing, but of greater significance be... They all be performed for dissolved gas analysis ( DGA ) requires a special sampling,. Vacuum tests of electrical transformers is just like a blood test provides a wide range of electrical.... 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Has a very light color and complies with performance standards that include dielectric breakdown, the transformer should enabled... Parts and materials blood of the insulation determining the condition of the.!: transformer oil testing equipment for current Load test and temperature Rise.... Will be performed by transformer oil testing equipment moisture ≤80 % RH 0.1 Resolution Ratio you identify issues.. An arc will cause all combustibles to be sent to a laboratory of. The particulate metals that could originate from overheating or arcing and a rewind.! Dga test will indicate high thermal gases ( methane, ethane and ethylene ) as a result of of. Of each test overheating or arcing and a rewind conducted and condition of windings.