Bdv test of transformer oil pdf file

Worlds only true bdv setmeasures hv secondary voltage across oil vessel electrodes, instead of across hv primary. Breakdown voltage is measured by observing at what voltage, sparking strands between two electrodes immersed in the oil, separated by a specific gap. Predicted oil bdv size of testing set samples prediction accuracy 1 96. Bdv test of transformer oil procedure pdf file scoop. Oil to be tested is placed in a cell containing one pair of electrodes placed with a gap of 2. The testing of transformer oil works by acquiring the breakdown voltage.

Requires 1 litre of oil in a polyethylene container. The attached file will update all the test standards of your ots to the latest versions. Transformer oil test methods include astm, bs,and other recognized transformer oil analysis testing procedures. We collect oil sample for performing different tests on the oil to determine different physical, chemical and electrical characteristics of the oil.

For veryfication of oil purity every year to be checked the bdvbreakdown voltage,we have take out the transformer oil in the transformer and collect in the high voltage kit inthe kit two stem will be there within the 2mm gap and then apply the high. We should always take at least 1 to 2 liter of oil from bottom valve or oil sample valve if available depending upon the tests to be performed on that sample. For measuring bdv of transformer oil, portable bdv measuring kit is generally available at site. Comprehensive test reports printout ba75, ba80 and ba100 pdf file text and xml file measurement of oil temperature bluetooth and usbconnection printout of test results pc software ba control center manage up to 4 bas from your pc simultaneously start the test sequence remotely from your pc. Download bdv test of transformer oil procedure pdf file. A rating of 30 kv is the minimum breakdown voltage at which transformer oil can be safely used in a power transformer. If regularly conducted, oil analysis allows identification of specific fault conditions that may be developing.

Is synchronous check relay system for two power transformers compatible to be used to make synchronizing between transflrmer transformer and generator. The transformer oil is used in the transformer for insulation as well as for cooling purpose. Jun 28, 2019 that is why specific resistance or resistivity of transformer oil should get measured at 27 o c as well as 90 o c. These tests include dielectric breakdown, power factor, interfacial tension, acidity, and color. Higher the moisture in the oil, lower will be the bdv for transformer oil.

Since the transformer oils are designed to insulate electrically, they must be periodically tested for stability by using standard testing procedures. Megger ots100af insulating oil test set 100kv test meter. Testing sequences and procedures are defined by various international standards, many of them set by astm. Peaobdvmxxx automatic oil breakdown voltage tester features available in 100kv m100, 80kv m080 and 60kv m060 versions. Bdv test is an very important testing procedure for the insulation oils in transformer. Transformer oil testing petroleum transformer free.

A larger quantity of oil is needed for these tests. The sample is the representative of the oil inside the equipment. About 90% of these are testing equipment, 1% are other test instruments. This test can give an early indication of abnormal behavior of the transformer. Jun 22, 2019 bdv value of transformer oil pdf transformer oil, a type of insulating and cooling oil used in transformers and other electrical typically 5 repetitions, depending on the standard. Bdv tests is used to test the dielectric strength of the transformer. Routine testing of transformer oils and insulating oils on a regular schedule is an accepted industry. One of the fundamental tests of oil quality is the breakdown voltage test, which is a measure of the oils ability to withstand electric stress. The ots100af offers repeatable results with lockin precision, electrode gap adjustment. Aug 30, 2019 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. A wide variety of transformer oil tester options are available to you, such as auto testing machine, strength testing machine, and abrasion tester.

Transformer oil analyst software, the fault condition of the transformer can be diagnosed. There are several methods of interpreting dissolved gas analysis data in transformers filled with beta fluid. The insulating material should sustain the voltage up to its dielectric strength. Oil sampling and analysis north vancouver facility we are pleased to submit the insulating fluid report and test sheets for the three 3 transformers and one 1 ocb located at the north vancouver facility. Jun 12, 2019 bdv is an important and popular test of transformer oil, as it is the primary indicator of the health of oil and it can be easily carried out at the site. An oil test can be performed quickly and economically, as the testers can be taken onsite and therefore no oil sample needs to be shipped to a test laboratory. The megger ots range of dielectric breakdown voltage test sets. Dissolved gasin oil analysis the most important test that can be done on the liquid insulation of a transformer is an annual dissolved gas analysis dga. Breakdown voltage bdv testing of transformer oil youtube. The transparent, shielded lid and large test chamber enable easy access to the test vessel. In this paper, an attempt has been made to carry out automation of breakdown voltage test for insulating oil by using low cost microcontroller.

In this kit, oil is kept in a pot in which one pair of electrodes are fixed with a gap of 2. Jan 23, 2017 breakdown voltage bdv testing of transformer oil. That is why specific resistance or resistivity of transformer oil should get measured at 27 o c as well as 90 o c. In this article, i will discuss transformer oil sample tests other than dissolved gas analysis dga. The transformer oil test kit is ensured to measure with high level of accuracy. Mineral oil is the most common insulating fluid and. China portable laboratory 100kv transformer oil breakdown. Bdv is an important and popular test of transformer oil, as it is the primary indicator of the health of oil and it can be easily carried out at the site. This test shows the dielectric strength of transformer oil. Basics, maintenance, and diagnostics ix contents continued page 6. Dielectric strength means the maximum capacity to withstand voltage of insulating oil. You can also choose from electronic, hydraulic transformer oil tester there are 633 suppliers who sells transformer oil tester on, mainly located in asia.

For measuring bdv of transformer oil, bdv measuring kit is used. Ots100af, ots80af and ots60af laboratory oil testers. Depending on the type of oil used the breakdown voltage can be up to 60kvmm dried oil or 40kvmm non driedoil. The megger ots100af oil test kit can be used for test voltages up to 100 kv megger ots100af oil test kit features. A new transformer oil should have at lest a dielectric strength of 39 kv. Depending on the type of oil used the breakdown voltage can be up to 60kvmm dried oil or 40kvmm non dried oil. The normal procedures of collecting oil from a transformer or other oil immersed electrical equipment are given in following points. A wide variety of bdv testing kit options are available to. What is bdv test for distribution transformer answers. These include the chemical and causes of the specific physical properties of the test oils. The bdv of oil in transformer is 60 kv1 min within the gap of 2. Find details of companies offering transformer oil test kit at best price.

Break down voltage is measured by observing at what voltage, sparking strants between two electrodes immerged in the oil, separated by specific gap. An oil test can be performed quickly and economically, as the testers can be taken onsite and therefore no oil sample needs to be shipped to a test laboratory the whole test sequence including stirring and repeated measurement is carried out. The following are the methods that are recommended by dielectric systems, inc. Mineral oil is the most common insulating fluid and has been in use since the late 19th century. The breakdown voltage bdv test kit consists of two electrodes mounted on horizontal axis with 2.

Bdv value of transformer oil pdf transformer oil, a type of insulating and cooling oil used in transformers and other electrical typically 5 repetitions, depending on the standard. 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. Buy megger ots100af oil test kit ireland powerpoint. Transformer oil testing kit udeyraj electrical pvt. After the transformer oil test is completed, the insulation oil is stirred automatically and the test sequence is performed repeatedly. Break down voltage test of transformer oil duration. 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. It is a complex mixture of hydrocarbons with small quantities of non hydrocarbon compounds.

Breakdown voltage of the transformer oils under certain conditions. Carry out the statutory transformer oil test onsite. Transformer oil also called as mineral insulating oil originate from petroleum. The megger guide to insulating oil dielectric breakdown testing. The megger ots100af oil test kit is a fully automatic oil test set which and is used to perform accurate breakdown voltage tests on mineral, ester and silicon insulating liquids. When you say bdv you might mean the dielectric strength of transformer oil. Bdv value of transformer oil pdf transformer oil, a type of insulating and cooling oil used in transformers and other electrical typically 5. As the name implies, this test analyzes the type and quantity of gases that are dissolved in the transformer oil. Gray transformer chemistry services introduction the fault free operation of power transformers is a factor of major economic importance and safety in power supply utilities and industrial consumers of electricity. What is the minimum value of breakdown voltage of transformer. Transformer oil test set, oil test set, transformer oil test manufacturer supplier in china, offering portable laboratory 100kv transformer oil breakdown voltage bdv test equipment, infrared forehead thermometer gun high accurate fever body temperature detector, portable sf6 gas purity dew point decomposition comprehensive analyzer kit and so on.

Pdf development of an automated break down voltage test set. Lowcost manual instruments are still available, but think. The chemical structure of transformer oil is very complex. All data can be downloaded either as adobe pdf or in text format by email for import into the delta x transformer oil analyst program, or databases such as. The oil testers by b2hv are of compact design and portable ba75 oil tester. However, it really depends on the application and again, the type of oil. As a result the breakdown voltage is calculated as mean value of the individual measurements. In chapter three and four, an extended discussion on the transformer oil properties is made, taking into consideration the eleven most important ones.

Bdv of 50 kv and above is considered good for operation while 60kv and above means the oil is in excellent condition when gap between terminal during bdv test is 2. Collecting oil sample from oil immersed electrical. Transformer oil testing quick, simple and onsite b2hv. Evaluation of transformer condition using individual and tdcg concentrations. Dissolved gas analysis guide for transformers filled with. A low value of bdv indicates presence of moisture content and conducting substances in the oil. Transformer oil bdv tester made in china transformer oil. During the transformer operation for a period, insulation oils will become dirty degradation which results in loosing function of the oil in transformer as insulation and cooling, in that case. Aug 31, 2019 as a result the breakdown voltage is calculated as mean value of the individual measurements. The screen test is a collection of physical, electrical and chemical tests for the transformer oil.

Process of collecting oil from oil immersed electrical equipment like transformer. Based on the procedure above breakdown voltage of an oil sample is determined six. The transformer oil testing device measures and reports the root mean square value of the breakdown voltage. A new transformer oil shol\uld have at least dielectric strength of 39 kv as per british standards. Interfacial tension is exactly useful for determining the presence of polar contaminants and oil decay products. Transformer oil used are normally tested using astm d87782 with the kv strength testing,using 1 electrode spaces 0. The megger guide to insulating oil dielectric breakdown. The dielectric strength of transformer oil is also known as the breakdown voltage bdv of transformer oil. Specific transformer oil test method availability will vary depending upon location. Dielectric strength of transformer oil is also known as breakdown voltage of transformer oil or bdv of transformer oil. Collecting oil sample from oil immersed electrical equipment.