transformer oil testing

Dissolved Gas Analysis is the single most important test performed on oils from transformers. Top oil and winding thermometer. Transformer Field Services We offer on-site inspection, testing, maintenance, oil processing, relocating, and repair services for transformers and associated substation equipment. Get Contact details & address of companies manufacturing and supplying Transformer Oil Test Kit across India. 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. It is therefore, essential to the life of the transformer to periodically monitor the condition of the insulating oil. If the oil becomes contaminated or begins to oxidize and breakdown, the performance is compromised and the transformer can short out or worse. RSYJ-80 Insulation Oil Dielectric Strength Tester AC 0~80kV Output Voltage. ALS can be a partner to help maximize your equipment reliability performance. That means we have the capability and capacity to provide effective, accurate test results quickly. 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. For additional information, contact our ALS laboratory in Sydney Australia. RSDDG Switchgear Testing Equipment for Current Load Test and Temperature Rise Test. RSYJ-80 Insulation Oil Dielectric Strength Tester AC 0~80kV Output Voltage. No single test alone will represent or indicate the true condition of the liquid. Transformer excitation current test : 5 years. 5. 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. 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. If you disable this cookie, we will not be able to save your preferences. Our testing procedure can be broken down into certain sectors. No single test alone will indicate the true condition of the liquid, so all the screen tests should be performed. Transformer oil is crucial in the cooling process of a transformer. There are many benefits to using MIDEL fluids, such as 100% fire safety, environmental friendliness and low maintenance. Transformer oil is crucial in the cooling process of a transformer. Full testing, sampling and analysis; Heat vacuum oil purification plant 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. Maintenance of substation transformers is often neglected, with potentially severe consequences. The “screen test” is a collection of physical, electrical and chemical transformer oil testing methods. A loose connection also may cause arcing, but of greater significance would be arcing due to insulation breakdown. A decreasing value indicates an increase in contaminants and/or oxidation products within the oil. As the insulating materials in a transformer break down due to thermal and electrical stresses, gaseous byproducts are formed. 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. Measurement of the harmonics of the no­load current. 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. Determines the presence of degradation in cellulosic materials such as paper, pressboard, and cotton, which generate furanic compounds in the insulating oil. The insulating fluid in a power transformer performs two major functions: Serves as electrical insulation to withstand the high voltages inside 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. The color of transformer oil changes from light yellow to cloudy brown under the influence of temperature, contaminants and electric current. The screen test is a collection of additional physical, electrical and chemical tests, including: dielectric breakdown, power factor, interfacial tension, acidity and color. The oil circulates through the transformer by natural convection. Measurements are made by the amount of potassium hydroxide (KOH in mg) required to neutralize the acid in one gram of oil. Oil testing allows the operator to determine the equipment’s operating efficiency, conditions and the possibility of future malfunctions. Electrical and thermal stress or chemical contamination can cause failures and reduced component life. These services are performed by skilled and experienced transformer specialists, using … Transformer oil is not any ordinary oil. Expert transformer condition diagnostics backed by five decades of data-driven wisdom. If the oil is fresh, the lowest allowable breakthrough voltage is 30 kV. Title: Microsoft Word - TROILANA.DOC Author: User Created Date: 6/15/2005 8:47:19 AM Oil is visually examined by passing a beam of light through it to determine transparency and identify foreign matters. SDMyers has the largest transformer oil testing lab in the world, with packages that test for every known fault condition. Dissolved gas analysis (DGA) is the study of dissolved gases in transformer oil.It is also referred to as a DGA test. explore. In some transformers, that meets the minimum operating standard. To evaluate the quality of the transformer oil testing, three steps are important to be carried out. Identifies any dissolved metals that could originate from overheating or arcing and a portion of the particulate metals that may originate from mechanical wear. Contamination of the oil is exhibited by poor transparency, cloudiness, or the observation of foreign particles. Additional useful tests performed by transformer oil laboratories include those for water content, PCBs furanic compounds and metals-in-oil. Transformer oil is not any ordinary oil. (PCB) content. Find here Transformer Oil Test Kit manufacturers & OEM manufacturers India. The oil pressure test on transformer to check against leakages past joints and gaskets is included. 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. 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. Transformer oil testing and analysis is a cost-effective preventive maintenance tool for your electrical power system. If a transformer is overloaded for a long period of time, the deteriorating condition of the cellulose will shorten the life of the transformer. 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 dielectric breakdown voltage is measured by applying a voltage between two electrodes under the oil. Electrical and thermal stress or chemical contamination can cause failures and reduced component life. The oil pressure test on transformer to check against leakages past joints and gaskets is included. Oil level indicator operation : 5 years. Overheating of the liquid insulation is a slightly different problem in transformers and can be on of transformer oil testing methods. Insulating Oil(Transformer Oil) Testing is an essential part of any maintenance plan for the transformer. RSDDG Switchgear Testing Equipment for Current Load Test and Temperature Rise Test. If a winding shorts from turn to turn, or phase to phase, or phase to ground, arcing will occur and the transformer will fail. 1. ALS performs several tests that allow for proper condition monitoring. We are accredited from NABL for high voltage electrical transformer testing. Transformer testing is done for confirming the specifications and performance of an electrical power 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. Oil Filtration Machine. If conditions are not severe, the transformer should be monitored closely. Analysis of gases in the oil can indicate insulation overheating/overloading, liquid overheating, partial discharge (corona), or arcing in the transformer. The acid number is expressed as milligrams of KOH required to neutralize all acids in a gram of oil and indicates the degree of oil aging. Transformer oil has to be tested to make sure that the performance and efficiency of the transformer are good. Transformer Oil Analysis for Maintenance Programs Anne Reygaerts, Laborelec. Furanic Compounds In 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. A portion of the insulation may deteriorate until it can no longer contain the stress of the electrical conductor. The byproducts are characteristic of the type of incipient-fault condition. Insulation breakdown in the windings, from coil to coil or coil to ground, will result in arcing. It is therefore prudent to periodically perform tests on the oil to determine whether it is capable of fulfilling its role as an insulant. Whenever a transformer undergoes abnormal thermal and electrical stresses, certain gases are produced due to the decomposition of the transformer oil. All our transformer oils are tested thoroughly to ensure they are capable of meeting these demands. 6. If the arc occurs in the area of cellulose insulation, carbon dioxide and carbon monoxide also will be elevated. An annual DGA is the most important test for liquid insulation. It also insulates the transformer and allows electrical components to be more compact than free air apparatus. Early testing will set up a bottom line for contrast & yearly testing will design any changes inside the transformer. After all the accessories of the transformer are installed. T. Measures the voltage at which the oil fails electrically, which is indicative of the amount of contaminant (usually moisture) in the oil. This means that every time you visit this website you will need to enable or disable cookies again. The oil treatment process is carried out using an oil filtration machine also known as insulating oil treatment plant or IOT. Our Transformer Oil Testing lab is NABL accredited. Power Transformers offers Transformer Oil testing, regeneration, recycling, purification and supply services for the full range of electrical transformers. 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. A larger quantity of oil is needed for these tests. Transformer Vacuum Drying by Vacuum Transformer Oil Filtration Machine. The degradation materials produce CO and CO2 gases. Electrical and thermal stress or chemical contamination can cause failures and reduced component life. ppm: Neutralization (Acid) number: D974: New transformer oils contain practically no acids. Arcing can be generated in many areas of a transformer. Electronic on-line dissolved gas detectors can be connected to important or distressed transformers to continually monitor gas generation trends. Inspection : Anually. Identifies various gas ppm levels that are present in transformer insulating oil. Other tests, such as dissolved gas, normally require a sample to be sent to a laboratory. Special Tests of transformer include 1. The paper insulation which is normally used to insulate the windings of a transformer is a cellulose product. FUNCTION INTRODUCTION 1. We'll assume you're ok with this, but you can opt-out if you wish. If the combustibles are stable and remain present, the transformer should be inspected at the next outage or downtime scheduled. Remove a sample of insulating transformer oil in accordance with ASTM D-3613 and test shall be performed for dissolved gas analysis (DGA). However, the high energy required to produce an arc will cause all combustibles to be elevated. 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. GlobeCore uses test results to diagnose transformer problems. Six breakthroughs are achieved in the test and the last five are averaged. This early warning system can allow management to identify maintenance priorities, plan work assignment schedules, and order necessary parts and materials. Gas content is measured by an absorptiometric analyzer or a chromatographer. Diagnostic testing, field maintenance & repairs. Measurements are made using high-performance liquid chromatography (HPLC). Testing a Transformer. Pour Point of Transformer Oil It is the minimum temperature at which oil starts to flow under standard test condition. Insulating oil – DGA, physical, and chemical tests : Anually. Transformer Oil Testing. Acidic sludge forms in contaminated oil and aggressively attacks the cellulose insulation and reacts with the metals of the transformer’s other internal components. Transformer Oil Sampling. The power factor of insulating oil equals the cosine of the phase angle between an ac voltage applied and the resulting current. These tests are carried out during the maintenance and operation of the transformer. To gather the sample, a clean, moisture free container must be used — typically a 1 liter glass bottle. 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. For mineral oil, the power factor of new oil should not exceed 0.05 percent at 25 degrees C. 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