Utility Line Construction Services
Department of Training
U.W.U.A Local 223, AFL-CIO
“Power for America Training Trust Fund”
2011 Seminar Report,
As an employee and member of this great organization “ULCS-Utility Line Construction Services,” I want to express my appreciation and my gratitude as I felt honored for being chosen by the Management Group, Training Department and “Immediate Supervisor” with the support of the U.W.U.A. Local 223, AFL-CIO “Power for America Training Trust” to Participate on the Doble Seminar title “Life of a Transformer 2011” hosted by Doble Engineering Company in Orlando, Florida.
Context and Development
On Monday, February 7, 2011, The Welcome, Introduction, and Opening remarks were presented by Richard K. Ladroga, P.E., Vice President, Global Strategic Development for Doble Engineering Company. He opened the seminar by pointing out the motivation for which the seminar was created. The absence of manufacturers of high power transformers in this country have diminished the knowledge of the trade. In 2003, they ventured to create this seminar to assist the new generation that have been incorporating into the industry in the past decade, and giving them the opportunity to gain a great deal of valuable knowledge from “The Best of the Best” in the industry. This seminar is a tool to educate, inspire and set a new path to understanding the life and maintenance of a transformer by exchanging experiences, ideas and new innovation in the world of transformers.
Experience and Comments
The seminar was structured into two sections, a Core Training and Advanced Training. Both groups were kept together in the morning and then separated after the first session. Most of my attention was given to the Core Training, where some of the speakers came down to basics of the transformer design, scaling quickly to the complexity of designing and manufacturing a transformer. It was very impressive to be exposed to that level of knowledge on the design and manufacturing of transformers.
One of the speakers that impressed me the most was Mr. H. Jin Sim, P.E. VP & Chief Technology Officer, Waukesha Electric System. He was talking about Transformer Design & Manufacturing. He mentioned about the use of PRD “Pressure Relief Device” – these devices are designed to relieve pressure in the event of a short or fault, preserving the integrity of the tank. From technical manufacturers manuals, one (1) PRD for every Ten Thousand (10.000) Gallons of Oil are usually used. He continued by saying that in the 1940s General Electric performed some experiments with transformer exposed to internal faults where PRD were used, 1 PRD per 10.000 Gallons of Oil, 2 PRD per 10.000 Gallons, etc. The results were that the tanks would collapse in the presence of that much internal force under a fault. They even attempted a transformer without a cover, but it still ruptured as the blast of the oil (being a not compressible liquid) would destroy their joint and welds.
By Michael Franchek, Weidmann Electric Technology
Manufacturing and Process and how it is use in the manufacturing of transformers.
By Jimmy Rasco, Ergon
He explained the process of refining petroleum to produce transformer oil from raw petroleum to the final product. Types of transformer oil, additives, and corrosive consequence in the use of oils with content acids (sulfur) in their chemical composition, as well as degasification and testing before the oil is shipped and received.
Transformer Bushing Field Issues and Replacement Consideration
By Randy Williams, ABB
He explained that General Electric played an important role in the manufacture of apparatus bushing in the early 1920s and the how “type U” bushings are becoming a problem for the electric industry around the world because of the failure of its condenser, rapidly increasing the power factor in transformers.
By Rick Youngblood, Doble Engineering
This speaker is a great individual. He knows the reality of the work of maintenance; he said that he has had good and bad experiences as he emerges from the field, making him a good realistic speaker by bringing his exciting experiences to the table as a tool to teach us and avoid situations that can cost time and money by working safe while taking care of power equipment.
There were other important topics that were exposed and discussed as well, such as the very important session of “Question and Answers” to the panel of speakers, which gave us good information and ideas. New products and technologies were advertised and shown. Interaction with their sales persons and their comments, benefiting me and enriching my knowledge as I continue to learn this world of electricity.
Overall, it was a great experience. For me being able to be there to listen and learn from the Best is a “privilege.” Thank you for the “Trust and Support” set upon me, by helping me to become a better technician, more qualified to serve you for the future to come.
Technician Jhonny A. Escalante
PERT Transformer Group
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