The acidity level of transformer oil is measured as per british standard bs2000 part 1. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. It applies to oil delivered to the agreed point and time of delivery, intended for use in transformers, switchgear and similar electrical equipment in which oil is required as an insulant and for heat. Oil quality measuring moisture, acidity, solid contamination and breakdown. The effect of acid accumulation in power transformer oil on the aging rate of paper insulation. This is the critical acid number and deterioration increases rapidly once this level is exceed. Acids and other oxidation products will, in conjun. Electrical problem, pot head or bushing compounds, uncured varnishes or polymers, new oil in a dirty unit. Koch and others published the breakdown voltage of insulation oil under the influence of.
For portable acidity testing kit for transformer oil procedure. Once the oil colour changes from the yellows into ambers and browns, the oil has degraded to the point where the insulation system has been affected radical colour changes may be caused by. Furthermore, transformer oil ift and acidity measurement aids in identifying the insulation aging activity within the transformer as there is a strong correlation. Whenever a particular amount of alkali is added with the same amount of insulating oil its nature will be change into acidic, neutral or alkaline. A new technique to measure interfacial tension of transformer oil.
Hzsz3 automatic transformer oil total acid number tan. Procedures for drawing transformer oil samples general sampling electrical insulating oil for laboratory analysis requires care to ensure that the sample is representative of the product being sampled. If oil becomes acidic, water content in the oil becomes more soluble to the the oil. Insulating oil in electrical power apparatus serves two primary roles, as an insulator and a coolant. Hzsz3 automatic transformer oil total acid number tan tester. If regularly conducted, oil analysis allows identification of specific fault. Test methods by the american society for testing of.
Routine testing of transformer oils and insulating oils on a regular schedule is an accepted industry. Transformer oil acidity test kit procedure, precautions. Acid number is expressed by potassium hydroxide in mg required to neutralize free fatty acid in 1g of oil. Test for refined winterized salad oil cold test test for teaseed oil in olive oil test for presence of olive residue oil in olive oil test for semisiccative oil in olive oil determination of 9, 10 epoxy and 9, 10 dihydroxy stearic acid in salseed fat test for presence of mineral oil holdes test thin layer chromatography test. We stock megger insulating oil testers for the field and the laboratory for exactly this purpose. It consists of one polythene bottle of rectified spirit ethyl alcohol, one polythene bottle of sodium carbonate solution and one bottle of universal indicator liquid.
Mineral oil is the most common insulating fluid and has been in use since the late 19th century. Basics, maintenance, and diagnostics ix contents continued page 6. The screen test is a collection of physical, electrical and chemical transformer oil testing methods. Compounded engine oils can and usually do have both acid and base numbers in. As an insulating liquid, oil s most important property is a high dielectric strength and as a cooling liquid, a low viscosity is paramount. Acidity test of transformer insulating oil electrical4u. Arcs occur usually during voltage testing, shut down and startup of a. Product information dissolved gas analysis and supervision of oil condition in transformers and reactors transformers diagnostic services at abb performs dissolved gas analysis and supervision of oil condition in power transformers, reactors, instrument transformers, circuit breakers and oil. About 90% of these are testing equipment, 1% are blood pressure monitor.
Before attempting to draw the sample identify the type of cooling liquid in the transformer. Columbia petro chem, manufacturing bisapproved transformer oil to a multilocational, multiproduct onestop shop for quality lubricants and speciality oils. Transformer oil is a required addition to electrical transformers. Monarch controls m414, 1 st stage, 8 th cross peenya industrial estate bangalore 560058 ph. Where by arrangement between the purchaser and the supplier, an oil containing an oxidation inhibitor or other additive, that is, an inhibited oil is supplied, the base oil used shall comply.
It was observed that twenty test samples of transformer insulating oil from four distribution transformers passed acidity test while ten. It is an optional component in high vacuum transformer oil filtration machine which is provided if the customer demands it. The effect of acid accumulation in powertransformer oil. Pdf significance of transformer oil testing researchgate. The role of corrosive sulfur in transformers and transformer oil lance r. Test parameters test method ref standard 01 interfacial tension ring method is. As acid values increase, usually due to oxidation of the oil, the insulating quality of the oil decreases. Transformer oil acidity test, transformer oil acidity test. See cargill s envirotemp fr3 fluid storage and handling guide, s10, for additional information. If the added alkali is equal to the required quantity of alkali then it will neutralize the transformer oil. This paper presented the qualitative assessment of transformer insulating oil.
Transformer oil purchase specifications developed under the auspices of the doble oil committee march, 2017 composition this specifications covers new insulating oil for general applications for liquidfilled electrical equipment, which are manufactured from mineral crude, which may be either naphthenic, which has a very low naturally. Pdf the breakdown voltage of insulation oil under the influence of. Hzcs3 transformer oil acidity test kit deatils show. Oil quality transformer oil is a mineral based oil. Npm services offers a full line of transformer diagnostic tests to determine the integrity and serviceability of insulating fluids. The acidity test measures the content of acids formed by oxidation and contaminates. Specific transformer oil test method availability will vary depending upon location. The extent of the corrosion damage caused by sulfur, if left unchecked, can be so severe as to cause failure of the apparatus. Transformer oil also known as insulating oil is a special type of oil which has excellent electrical insulating properties and is stable at high temperatures. Main purpose of the the oil in a tank is to be an insulator. The acidity test of transformer oil can be experimented by titration method. The acidity of oil in a transformer should never be allowed to exceed 0. Transformer oil testing oil sampling a test is only as good as the sample.
Hzcs3 transformer oil acidity test kit made in china. Standard methods for the analysis of oils, fats and derivatives 1st supplement to the. Acidity test of transformer oil powerlink refinery ltd. Product information dissolved gas analysis and supervision.
What should be the water content in transformer oil, and. Acidity of oil is responsible for decreasing insulation property of oil, increasing water solubility. To maintain the acid number within specified level is the key of quality control of the insulating oil. Measurements are made by the amount of potassium hydroxide koh in mg required to neutralize the acid in one gram of oil.
Onsite testing of acid value of oil has become an important task 9. There are many types of organisation that benefit from carrying out tests on transformer oil. Whenever a particular amount of alkali is added with the same amount. Dielectric strength, breakdown voltage and acidity test. Measurement of acid number of insulating oil is specified in jisc2101 test method for electrical insulating oil and jpi5s5799. We can determine the acidity of transformer insulating oil, by a simple portable acidity test kit. C transformers ubstations andbook transformer oil analysis basic introduction by n robinson, wearcheck as blood tests disclose ones state of health, so oil analyses disclose the condition of a transformer. A transformer filled with fr3 fluid complies with the transformer temperature operating range requirements defined in ieee c57. The number of single breakdowns for each measurement point were 200420 for the pressure range below 1 bar and. Mineral, ester and silicone oil are extremely effective insulators but do degrade over time resulting in the need to test their breakdown voltage. Acidity the acidity test is used to estimate the total acid value of the transformer insulating liquid. Transformer oil analysis testing service for monitoring the condition of transformer oils routine testing of transformer insulating oil is an essential maintenance function that ensures a safe working environment and helps eliminate the possibility of disrupted production resulting from a transformer failure or explosion. The megger guide to insulating oil dielectric breakdown. Transformer oil test methods include astm, bs,and other recognized transformer oil analysis testing procedures.
Acidity contnet test is done on transformer oil to measure the acidity content of oil its unit is mgkohgm of oil. It is commonly used in transformers because of its chemical properties and. A wide variety of transformer oil acidity test options are available to you, such as electronic, hydraulic. You can download a free pdf of these and other limits here. Transformer oil maintenance electric energy online. Oil in each instance degrades over time resulting in the potential for failure or costly repair bills. Characteristics of transformer oil requirement method of test 12 oxidation stability after 164 hrs. Because these generate a lot of heat that must be removed, they need to be insulated and they have to resist sparking, the physical and chemical properties of certain oils make them ideal for use in transformers and capacitors. Lewand doble engineering company, usa introduction corrosive sulfur and the effect that it has in transformer systems can be significant. Mineral oil, breakdown, particles, acidity, humidity, pressure. Standard methods for the analysis of oils, fats and. Transformer oil analysis provides a highly accurate indication of the internal condition of a transformer. Acidity of oil is responsible for decreasing insulation property of oil. The breakdown voltage, dielectric and acidity tests were electrically and chemically carried out on sixteen samples of transformer insulating oil collected from various serving distribution transformers in ilorin metropolis in nigeria, through the supply authority.
Power transformer diagnostics, monitoring and design. Regular sampling and testing of insulation oil taken from transformers is a. Transformer oil acidity test kit procedure, precautions and color chart 1. Causes of acidity in insulating oil in insulating oil in the transformer may occasionally come into contact with air. The acidity of a used oil is due to the formation of acidic oxidation products. No general correlation is known between acid number and the corrosive tendency of oils toward metals. Petroleum acid number of insulating oil kyoto electronics.
Transformer oil is used in oil filled electrical power transformers to insulate, stop arcing and corona discharge, and to dissipate the heat of the transformer i. Therefore, you dont want to have a water in your transformer because water is a very good conductor and could cause a partial discharge. In general, acidic byproducts produce increased dielectric loss, increased corrosivity, and may cause. Transformer oil testing is a cornerstone of an asset management program. Transformer testing, transformer oil analysis lab, transformer oil test lab, oil transformer test sl no. A rapid method for determination of acid value in transformer oil by. For transformers and switchgear 1 scope this international standard covers specifications and test methods for unused mineral insulating oils. Pdf transformer is one of the vital components in power transmission and distribution system. Same nine samples were investigated for acidity value by means of. It is intended to use this oil as an electrical insulation and oil as coolant in applications such as transformers, reactors, tap changes, switchgear, oil filled capacitors etc. Who needs to perform dielectric breakdown voltage tests. Transformers and other high voltage installations often used insulating oil as the main insulant. These tests include dielectric breakdown, power factor, interfacial tension, acidity, and color. In the experiment proper, we considered only the acidity, whose concentration in the transformer oil increases with aging if the.
The megger guide to insulating oil dielectric breakdown testing. Once power transformer is charged and commissioned, transformer oil becomes a key. Materials astm provides that the acidity of oil in a. From the test results it shall be identified that acidity content is high for degraded oil. Our transformer oil analysis lab can is capable of conducting the following tests. Acidity contnet test is done on transformer oil to measure the acidity content of oil its unit is.
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