Testing and maintenance of transformer

Transformer oil testing and analysis is a cost-effective preventive maintenance tool for your electrical power system. The insulating fluid in a power transformer performs two major functions:. Even some new oils may require treatment to limit these contaminants to acceptable levels. Sampling and analysis of the fluid form the cornerstone of transformer preventive maintenance.

Samples can be mailed into our full service laboratory or drawn by one of our highly trained field service technicians. Your transformer fluids will then be analyzed to identify any potential or current problems with your equipment. In addition to a comprehensive test report that details all test analysis data, also included will be recommendations for possible corrective actions detected by the test analysis and inspection s.

All equipment will be photographed and photos are made a permanent part of the records and added to the finished test report. RESA can perform all necessary switchgear inspections, relay tests, electrical equipment cleaning, and calibration needed to keep your electrical system in optimal operating condition. A thorough, scheduled electrical maintenance testing program costs you much less than the impact of equipment failure or worker injury.

For complete electrical power system maintenance and testing services, contact us. Knowledge is power. Improve safety and operations with RESA's training programs. Through our network of field sales engineers and field technicians, RESA currently performs work throughout North America. Transformer Services. Transformer Oil Testing and Analysis.

Transformer and Switchgear Maintenance.

testing and maintenance of transformer

Learn more about our services. Power System Testing. Learn More. Preventative Maintenance. Power Systems Engineering. Training Services. Areas Served by this Center British Columbia.This hands-on course is intended for new or experienced electricians and technicians that install, maintain, repair or troubleshoot power transformers rated kV or less used in utility and industrial applications. Demonstrate routine and diagnostic inspections and point out potential problems and hazards.

Interpret nameplate data and use the data to set up correct test procedures. Simulate appropriate tests to evaluate the condition and perform maintenance on transformers. Perform oil sampling, testing, drying, filling and filtering. Explain gas sampling and testing. Analyze test results to troubleshoot transformer problems. Students must wear long pants and safety toe shoes to complete the lab portion of this course.

This is a great class for people to go to. My instructor was great and he had good knowledge. I would recommend others to take this class. Wish I could spend a few years learning from him.

Superb knowledge with practical applications! Thank you! Contact us Search for:. Enroll Now. Transformer Maintenance and Testing. Participants will receive instruction on the filtering and drying out process to be performed on transformers. This course uses up-to-date test equipment and procedures for evaluating the condition of a transformer.

Test results can provide predictive data which will guide maintenance activities and help to prevent catastrophic failure that may damage downstream equipment and endanger personnel. Ready to improve your skillset? James C.Table of Contents. Being transformers static machines without any moving and turning parts, they are very reliable machines, and if maintained properly, can last for 40 years or more.

Also they do not trip or blow when oven-stressed except under extreme conditionstransformers are frequently overloaded and allowed to operate well beyond its capacity. However, use and ageing of electrical installationssimilar to other installations, is an origin of normal deterioration in electrical equipment that can be accelerated by factors such as a hostile environment, overload, or severe duty cycle.

However, equipment failure is not inevitable if a checking and preventive maintenance program is established. Establishment of a regular preventive maintenance program may minimize the risk of equipment failure and the resulting problems of that failure, the detection of latent faults and the first step for troubleshooting. Power transformers must be inspected regularly so that problems can be detected early and corrected before major repairs are needed.

Inspections are done routinelyusually once a weekalthough the frequency can vary from company to company and among transformers. For example, a transformer may be checked more often if there is reason to believe that a problem is developing. Table 1 shows the types of visual inspections required to control the general exterior condition and cooling system. Table 1 — Visual inspection of transformers. Transformer monitoring refers to on-line measurement techniques, where the emphasis is on collecting pertinent data on transformer integrity and not on interpretation of data.

Transformer monitoring techniques vary with respect to the sensor used, transformer parameters measured, and measurement techniques applied. Since monitoring equipment is usually permanently mounted on a transformer, it must also be reliable and inexpensive. Winding and On-Load Tap Changers OLTC failures dominate; consequently, the focus of most monitoring techniques is to collect data from parameters that can be used to assess the condition of winding and tap changers.

Dissolved gases in oil and partial discharges PD are common parameters monitored related to winding and insulation condition. Temperature and vibration monitoring are commonly used for assessing OLTC condition. Figure 1 shows the statistics distribution of failures in an oil-immersed transformer.

Figure 1 — Statistics distribution of failures in an oil-immersed transformer. Common parameters used to monitor windings and insulation status is PD and dissolved gases in the oil ; in what concerns monitoring of OLTC temperature and vibration are used.

Main monitoring units used for transformers diagnostics are:. Data from monitoring sensors and units are transformed into digital and analogue signals and establish a real-time basis communication with a man-machine interface and data recording. Dissolved gas-in-oil analysis is an effective diagnostic tool for determining problems in transformer operation. However, this analysis is typically performed off-post, where sophisticated and usually expensiveequipment is used to determine gas content.

To reduce the risk of missing incipient faults due to long sampling intervals, monitoring techniques are being developed to provide warnings with respect to changes in gas types and concentrations observed within a transformer. Conventional dissolved gas-in-oil analysis is performed after a warning is issued.

Transformer Maintenance and Testing (TMT)

Several transformer gases and corresponding sources are listed in Table 2. Table 2 — Transformer gases and sources. By extracting the gas dissolved in the insulation oil of the main transformer and measuring the amounts of the six gas components at their low levelit is possible to detect local overheating or partial electric discharge in the unit depending on the analyzer data and to prevent any accidents before they occur. Maintenance activities may be planned for each segment of the installation at different periods, but major industries usually once or twice a year have a global shut-down for maintenance purposes.

The application of the matrix is recognized as a guide only. Specific condition, criticality, and reliability must be determined to correctly apply the matrix. Application of the matrixalong with the culmination of historical testing data and trendingshould provide a quality electrical preventive maintenance program.During these challenging times, we guarantee we will work tirelessly to support you.

We will continue to give you accurate and timely information throughout the crisis, and we will deliver on our mission — to help everyone in the world learn how to do anything — no matter what. Thank you to our community and to all of our readers who are working to aid others in this time of crisis, and to all of those who are making personal sacrifices for the good of their communities.

We will get through this together. Updated: March 29, Reader-Approved References. Transformers are an electrical component that transmit electrical energy between at least two circuits. Transformers regulate the voltage in circuits, but in some cases these can go bad and cause a circuit to not work.

You'll need to identify key information about your transformer, like whether it's suffered visible damage and what its inputs and outputs are. After that, it should be relatively simple to test the transformer with a digital multimeter DMM. Should you continue having problems with the transformer, you'll need to troubleshoot it.

To test a transformer with a digital multimeter DMMfirst turn off power to the circuit. Next, attach the leads of your DMM to the input lines. Otherwise, use the DC scale to determine what the issue is.

Electrical Transformer Training - Fundamentals of Testing and Maintenance

To learn how to troubleshoot your transformer, keep reading! Did this summary help you?

testing and maintenance of transformer

Yes No. Chabe Ramogayana. Log in Facebook Loading Google Loading Civic Loading No account yet? Create an account. We use cookies to make wikiHow great. By using our site, you agree to our cookie policy. As the COVID situation develops, our hearts ache as we think about all the people around the world that are affected by the pandemic Read morebut we are also encouraged by the stories of our readers finding help through our site. Article Edit.

testing and maintenance of transformer

Learn why people trust wikiHow. This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness. Together, they cited information from 11 references. Learn more Testing a Transformer with a DMM. Troubleshooting Your Transformer. Tips and Warnings. Things You'll Need.

Related Articles. Article Summary. Part 1 of Inspect the transformer visually.Transformer testing is one of the most important lectures so; you must read carefully and take your time to understand these tests… surly you ask why transformer tests are important? Firstly why we do these transformer tests? Secondly what is the specifications and codes that we use to do these tests? From the previous classifications, we can deduce that the first, second and third types of transformer testing are carried out by the factory which manufactured the transformer.

For the fourth, fifth and sixth types, they are carried out at the work site of the transformer. Now we will identify the 6 types of tests mentioned above:. These tests are carried out by the manufacturer on a prototype only of the production of that transformer and not on all the transformers produced. These tests are part of the electrical type transformer testing.

The manufacturer carry out Electrical routine tests to verify the operation efficiency and the life time of the transformer and these tests are carried out on all manufactured transformers. These tests are carried out at the work site of the transformer in order to ensure that the results of the tests carried out in the factory match with the results obtained at the site before the operation of the transformer as the transformer may pass the tests at the factory, but when it is supplied to the site fails in some tests due to the stresses During factory tests.

Then we can test the measurement of resistance to windings or analysis of oil used for cooling. Therefore, we know that there are many types of transformer testing done at factory or at the work site of the transformer as mentioned above and all revolve around the same tests. This is a list of all the tests done on the transformer: Click on any address to get the full details of this test. Posted By David — 2nd June ' Transformers Phasor diagram of transformer.

Transformers Transformer Turns ratio test. Author David.Topics included are transformer fundamentals, transformer ratings, transformer cooling, nitrogen gas systems and insulation systems.

The source concludes with in-depth discussions on transformer testing techniques. This course is applicable to technicians and engineers who need a sound understanding of power transformer operation and maintenance.

Students will learn safe and proper maintenance and testing procedures on pad-mounted, power transformers. The course covers transformers used in commercial and industrial power distribution systems, including oil and dry-type units. Larger power transformers used in utility applications are also covered.

Load and no-load tap changer maintenance, ac and dc testing, routine inspections and oil sampling and testing are covered in detail.

testing and maintenance of transformer

Students will learn how to perform routine oil tests, and understand how to perform the major tests that are required. This presentation will show how to identify, assess and mitigate the risks associated with distribution and power transformers. Transformers and other electrical equipment are assets that have ongoing maintenance needs or are at risk for failure.

The presentation will assist participants in developing an intelligent maintenance program that will evaluate risks and consequences of failure and prioritize maintenance needs according to our data and standards, industry standards and best engineering practices. Part 3. How dissolved gas analysis DGA results are interpreted — an important tool in the overall transformer maintenance program.

Includes hands-on break out groups. This session is intended to identify fault gases and what causes their formation; explain and provide examples of qualitative and quantitative interpretation of dissolved gasses. This class will also evaluate the condition of cellulose insulation and other non-routine tests, and how to determine if a transformer is at risk for failure due to presence of corrosive sulfur, and how to mitigate the risk. Learn how to properly inspect and safely obtain fluid samples from energized electrical transformers.

insulation resistance of transformer in hindi [{हिंदी में }]

This session is designed for substation personnel whose responsibilities include sampling and monitoring the overall condition of fluid filled transformers. Both days: Start: a. Coffee Break: a. Lunch: noon Restart: p.

Finish: p. Successful completion of this course qualifies delegates to receive a certificate of course completion with indicated CEUs. One CEU is equivalent to 10 professional development hours of instruction. We can present this Transformer Testing and Maintenance Training to your electrical engineering and maintenance staff, through our Live Online Training Platform, tailored to your specific equipment and requirements. We are ready to help design this program for you.

Click on the link below to request a FREE quotation. Transformer Testing and Maintenance Training. This 2-Day Transformer Testing and Maintenance Training course covers the testing and maintenance of power transformers and auxiliary equipment. Develop or improve a risk-based asset management program for your company.

Transformer Testing and Maintenance Training

Assess and implement proper maintenance practices to prevent unplanned and unscheduled outages. Students will be able to perform a transformer assessment to determine the condition and risk of your transformer investment. Learn how to develop or improve a risk-based asset management program. Identify categories of assets within an organization. Define risk-based asset management and why it is important in managing the life cycle.Our expert crews travel across the country to provide oil and electrical testing services, as well as transformer maintenance and repair.

When it comes to transformers, PSS does it better and more cost-effectively than anyone else. From installation and maintenance—to vacuum-filling and electrical testing—to oil testing and hot oil reclamation on energized transformers—we simplify your operation, saving you time, money and headaches.

They do it all — on-time and on-budget. Since partnering with PSS on a preventative maintenance plan, our transformer reliability has increased, with dramatically reduced downtime and ZERO catastrophic failures.

EPS concentrates on the removal and disposal of transformers and other electrical equipment. In additional, EPS also handles the recycling and disposal of various types of dielectric fluids. We offer a broad range of highly-specialized services that are focused of significantly reducing their ongoing liability, risks and costs in a safe and environmentally friendly manner.

Skip to content. Oil Reclamation. Vacuum Filling. Field Repairs. Oil Sampling. Our Solutions. Electrical Engineer. Fortune Company.

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