Transformer oil testing by robert turcotte, manager, electrical loss control the hartford steam boiler inspection and insurance company the value of transformer oil testing transformer oil testing is a proven loss prevention technique which should be a part of any conditionbased predictive maintenance program. Windings are the conductors wrapped in various forms like helical, disc, cylindrical, crossover which generates mmf that is carried by the core to other windings for having. Like blood testing in human beings, its an essential indicator of good health. Transformer oil is used in oilfilled and submersible transformers to maintain temperature of transformer. Bluetooth connection as means of communication with the instruments a usb flash drive interface and a bluetooth connection is offered. Transformer oil analysis provides a highly accurate indication of the internal condition of a transformer. Wet insulation contaminates the oil, temperature dependent.
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. Since the transformer oils are designed to insulate electrically, they must be periodically tested for stability by using standard testing procedures. 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. Find details of companies offering transformer oil test kit at best price. Mineral oil is the most common insulating fluid and has been in use since the late 19th century. The ultimate starting point for any transformer assessment is the oil analysis. The testing voltage can be set to anywhere up to 100 kilo voltage. Dnv gl provides independent oil laboratory services covering sampling, analysis and interpretation. The transformer oil test kit is ensured to measure with high level of accuracy. Before attempting to draw the sample identify the type of cooling liquid in the transformer. Transformer oil is not only subject to its own degradation, but is also a carrier of gasses emanated during arcing or flashovers between paper and winding insulations. The standard test suites are designed for individual samples to deliver a routine set of oil analysis at low. Transformer oil testing is a cornerstone of an asset management program. Ageco international fzes knowledgeable site service personnel are trained in transformer oil sampling.
Service contract for carrying out the transformer oil. 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. There are many reasons to do oil sampling and analysis as a core part of a preventative maintenance program and also during commissioning. Product information dissolved gas analysis and supervision. Practice procedure of transformer oil sampling iec 60475 procedure of oil sampling in aluminum bottle the aluminum bottle is used for oil analysis in general and for analysis of compounds which are sensitive to light such as peroxide and furfural. It evolved from the simple gonogo verdict into a sophisticated segment within transformer manufacturing. All of these oil types can be tested for dielectric breakdown voltage and tested with megger ots range test sets. Product information dissolved gas analysis and supervision of.
Arcs occur usually during voltage testing, shut down and start. A wide variety of transformer oil tester options are available to you, such as auto testing machine, strength testing machine, and universal testing machine. Consistent sampling needed to provide accurate trending results of units. Transformer oil surrounds and insulates the coil windings in highvoltage transformers. As part of routine testing regular oil testing enables comparative analysis over time. In this book we have laid down important aspects on transformer. Testing of power transformers seems like a similar experience. An important part of any transformer maintenance program is the routine sampling and analysis of transformer oil.
This guide describes methods of testing and specifications for electrical insulating oils of petroleum origin intended for use in electrical cables, transformers, oil circuit breakers, and other electrical apparatus where the oils are used as insulating, or heat transfer media, or both. The dielectric breakdown voltage is measured by applying a voltage between two electrodes under the oil. Pdf significance of transformer oil testing researchgate. Transformer oil testing quick, simple and onsite b2hv. With proper installation, commissioning, protection. The megger ots100af oil test kit can be used for test voltages up to 100 kv megger ots100af oil test kit features. The above standard testing is offered in specific diagnostic suites designed to provide the maximum condition information on the transformers. Through proper testing, the transformers lifespan is increased, reducing the need to pay for replacement. Transformer oil testing parameters and test methods. Transformers were traditionally overdesigned by 300% to ensure a long service life. Different gasses will dissolve in the oil that indicate various types of thermal and. See bigger list of transformer oil testing methods in the end of the article. There are many mineral oil filled transformers that have been in continuous use for more than 50 years.
Identifies various gas ppm levels that are present in transformer insulating oil. Testing sequences and procedures are defined by various international standards, many of them set by astm. Standard guide for sampling, test methods, and speci. Massachusetts, indiana, north carolina, texas, and our morgan schaffer laboratory in montreal, canada. 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 insulated cables. Transformer and switchgear manufacturers quality control of oil.
By robert turcotte, manager, electrical loss control. Transformer oil sampling, transformer oil testing and analysis company located in chicago illinois. Ampcontrols specialist nata accredited transformer oil testing laboratory provides you with comprehensive support for your transformer assets. 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. Transformer oil is used in oil filled and submersible transformers to maintain temperature of transformer. Transformer testing, transformer oil analysis lab, transformer oil test lab, oil transformer test sl no. The american society for testing and materials astm is the standard reference body used by most utilities in north. The oil testers by b2hv are of compact design and portable. Application of transformer oil can also be seen in highvoltagecircuit breakers and switches. Transformer oil, a type of insulating and cooling oil used in transformers and other electrical equipment, needs to be tested periodically to ensure that it is still fit for purpose. We recognise that insulating oil testing is a critical step in the management of transformer assets to maximise operational availability. As a result, the electrical resistance of the oil falls and.
The contractor is advised to go through the same and comply with the conditions. 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. Sep 24, 2017 with the help of transformer oil testing kit we can test transformer oil learn the process step by step. Transformer oil market global industry analysis, size and. Transformer oil analysis accredited test labs inspection. Dissolved gas analysis dga testing, dielectric breakdown voltage testing, olychlorinated biphenyl pcb testing, moisture testing, and more. Check for oil level release air from the buchholz relay and the bushings. Test parameters test method ref standard 01 interfacial tension ring method is. Astm d117 18 standard guide for sampling, test methods.
Transformer oil tests electrical engineering enersol. 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. After the transformer oil test is completed, the insulation oil is stirred automatically and the test sequence is performed repeatedly. The transformer oil testing device measures and reports the root mean square value of the breakdown voltage. The automatically generated report of the transformer oil testing sequence is available as a pdf version and is stored to the internal memory. The more contaminants in the oil, the lower the interfacial tension. Learn what transformer oil is, how to test transformer oil and the different types and properties. The transformer oil testing kit is of light weight and it is portable, so mobility of the transformer oil test kit is not an issue at all. Aug 30, 2019 oil testing consists of measuring the breakdown voltage, and other chemical and physical properties of the oil, either through portable test equipment or in a laboratory. Transformer oil, a type of insulating and cooling oil used in transformers and other electrical. Remove all visible dirt and dust from the sampling point 6. Mar 25, 2014 inspection, lab testing and calibration services for middle east, far east, subcontinent, america, africa and europe. If regularly conducted, oil analysis allows identification of specific fault conditions that may be developing.
The hartford steam boiler inspection and insurance company. Transformer and insulating oils are subject to electrical and mechanical stresses while a. Testing the condition and quality of transformer insulating oil provides data showing the actual condition of the transformer, and its remaining lifetime. Since the oil is in constant contact with components it is therefore susceptible to chemical interaction. During operation, the oil oxidizes and the oxidation products accumulate in the transformer oil. 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 oilinsulated cables. Basics, maintenance, and diagnostics ix contents continued page 6. Transformer testing has developed considerably over the past years. Oil testing is only half the work done without correct and accurate analysis, it serves no worthwhile purpose.
Core and windings of three phase core type transformer there are different types of windings used for different kinds of applications and arrangements. Our transformer oil analysis lab can is capable of conducting the following tests. Oil diagnostic suites for transformer oil diagnostics. 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. Job safety analysis power transformer testing check this is the latest process zone version before use. Remove shield from outlet sampling point 6 of a transformer. Page 1 of 8 reference sp0504r01 ver 1 reference owner. As means of communication with the instruments a usb flash drive interface and a bluetooth. Transformer oil testing kit udeyraj electrical pvt. Different types of transformer winding electrical4u. The performance characteristics of transformer insulating oil are monitored and tested at several stages during its service life. Npm services offers a full line of transformer diagnostic tests to determine the integrity and serviceability of insulating fluids. Orpic general conditions of contract shall be a part of this contract. One of the most important testing that can be performed on the unit without having to open it up or take unit out of service.
If fault suspected, best to sample after 24 hours of fault to insure equilibrium of gases has been established. Transformer oil testing and analysis provides important information regarding any such incipient faults, without the need to pull down the equipment from its running condition. Measures the voltage at which the oil fails electrically, which is indicative of the amount of contaminant usually moisture in the oil. Buy megger ots100af oil test kit ireland powerpoint. Doble laboratory services oil committee join the doble oil committee members who have a common interest in the quality of. Most of the electric power utilities adopt regular analysis of insulating oil samples as a basic requirement of transformer maintenance program. 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.
You can also choose from electronic, hydraulic transformer oil tester there are 687 suppliers who sells transformer oil tester on, mainly located in asia. Worlds leading reclaimer of transformer oil over 1 billion gallons processed. Oil spill kit test equipment will vary form site to site. The megger guide to insulating oil dielectric breakdown. Transformer oil testing measurement of interfacial tension for ensuring the quality of transformers. Astm d117 18 standard guide for sampling, test methods, and. The transformer oil test kit comes with an operating manual for guiding users, a 2 meter long main cord, go and no go gauges, in addition to. Astm d971 is very sensitive in detecting oil soluble polar. Oil testing consists of measuring the breakdown voltage, and other chemical and physical properties of the oil, either through portable test equipment or in a laboratory. New oil should have a minimum dielectric strength of 35 kv by astm methods of testing. Testing result limits 1 average breakdown voltage above 30 kv transformer below 72. Worlds largest database of test records 4,000,000 customer transformer test records. The megger guide to insulating oil dielectric breakdown testing.