doble engineering company - sunday, january...

© Doble Engineering Company Agenda is preliminary and subject to change.

Agenda is preliminary and subject to change.

Sunday, January 31, 2016 12:00 PM – 6:00 PM Registration & Information Desk Open

Monday, February 1, 2016 7:00 AM – 6:00 PM Registration & Information Desk Open 7:00 AM – 8:00 AM Attendee Breakfast 8:00 AM – 8:10 AM Welcome & Introduction David Zabetakis, President Doble Engineering Company David Zabetakis is President of Doble Engineering Company, a subsidiary of ESCO Technologies. Mr. Zabetakis was General Manager of Aclara Technologies’ Software Group where he was responsible for leading the development and deployment of Smart Grid software applications globally. Previously Mr. Zabetakis provided management consulting services throughout the energy vertical including acting as the temporary CEO for North American Power Partners, a demand response provider. He was Senior Vice President of CURRENT Group where he oversaw the business development efforts. Before joining CURRENT Group, Mr. Zabetakis was President and Chief Operating Officer of Pepco Energy Services where he oversaw its retail business focusing on the sale of electricity, natural gas and a variety of energy‐related products. Mr. Zabetakis has served in a variety of leadership positions in gas and electric distribution over the last 28 years. He served on the first Peer Review Board for President George W. Bush for DOE/FEMP. Mr. Zabetakis earned his MBA from Loyola College in Maryland and served in the Tactical Air Command of the US Air Force. 8:10 AM – 8:30 AM Opening Keynote Nashville Electric Services 8:30 AM – 9:15AM Primer on Large Power Transformers Mark Rivers, Vice President, Client Services Doble Engineering Company As we move forward into the 21st Century, the use of electricity by mankind has evolved into a necessary staple of everyday life. But it wasn’t always this way. The advent of power transformers in today’s world is a function of necessity, a product of ingenuity, and a marvel of technology. Power transformers are the key element in the present system of electrical power distribution, and this system could not function without transformers. Let’s take a look at why and how they were developed.

Mark Rivers received his BS in Electrical Engineering from the University of Massachusetts at Amherst, Massachusetts and a MBA at Nichols College in Dudley, Massachusetts. Since 1979 he had been employed by at Doble Engineering Company as a Principal Engineer consulting on electric power equipment insulation testing and maintenance. He has been active on the IEEE and Doble Transformer and Circuit Bushing Committees and has managed insulation software development. Currently Mr. Rivers is the Vice President of Client Service Engineering. He has authored numerous papers in the area of Transformer and Circuit Breaker Testing, and he was a technical contributor to the EPRI Guidelines for the Life Extensions of Substations. 9:15 AM – 9:30 AM Break 9:30 AM – 10:15 AM Video Presentation: “The Making of a Transformer” Troy Kabrich, General Manager – Services Division SPX Transformer Solutions, Inc.


Professionally filmed and produced at the Waukesha transformer manufacturing facilities, this video presentation and narrative will provide each attendee with a unique, up close tour of the inner workings of a transformer manufacturing plant. This detailed presentation which will cover all aspects of transformer manufacturing and construction and is ONLY AVAILABLE AT THE LIFE OF A TRANSFORMERTM SEMINAR. 10:15 AM – 11:15 AM Transformer Specification & Vendor Prequalification Bill Griesacker, Transformer Consulting Engineer Doble Engineering Company An effective procurement system utilizes the preapproval process to identify suitable power transformer vendors and a design review to establish an agreed upon design and procurement process. This preapproval approval process should include factory qualification audits which are essential to confirm a manufacturer’s ability to meet a purchaser’s requirements and expectations. The design review is performed to establish an agreed upon design and to facilitate the procurement process. That the supplier is capable of meeting the purchaser’s procurement specifications is confirmed during this process and the procurement process is expedited by bringing the purchaser and supplier together on the technical details of the purchased transformer. Bill Griesacker is a member of Doble Engineering Company as a transformer engineer working on projects that include factory inspections, condition assessment, design reviews, failure analysis and general consulting. He previously worked for Pennsylvania Transformer Technology Inc., where he held various positions including Engineering Manager. His work included high voltage insulation design, transient voltage modeling of power transformer windings and various LTC and DETC switch development projects. Prior to this, he was employed by the Westinghouse Electric Company, working on synchronous generator projects as a member of the Generator Engineering Department. Mr. Griesacker started his career with Cooper Power Systems in large power transformers and later worked in the Kyle Switchgear, Vacuum Interrupter Department. He has earned a MS in electric power engineering from the Rensselaer Polytechnic Institute and a BS in electrical engineering from Gannon University. Mr. Griesacker is an active member of the IEEE, PES Transformers Committee where he holds positions in several working groups and subcommittees. 11:15 AM – 12:00 PM Transformer Design Process Dharam Vir, Vice President of Engineering SPX Transformer Solutions, Inc. Transformers are tailor made products. The design process begins with understanding customer requirements. Using optimization programs a quote design is provided with the lowest total owning cost meeting customer requirements. During final design detailed dielectric, short circuit and thermal calculations are performed to ensure the transformer meets performance and customer requirements. The mechanical design of the tank, stiffeners, lifting and clamping structures enables the unit to withstand vacuum, pressure, short‐circuit, seismic and shipping conditions. Design verification is done by performing routine and type tests on the unit. Dharam Vir joined SPX Waukesha in 2004 with over 25 years of service to the transformer industry in EHV design, testing, production and plant operations. Prior to his current position, he held the positions of Engineering Manager for the Waukesha plant and director of our EHV program, leading the team responsible for the Waukesha facility expansion. Mr. Vir is an active member of the IEEE Transformers Committee and holds a BSEE from University of Delhi India, a MS in Electrical Engineering from NIT Bhopal India and an MBA in Finance and Marketing from Bhopal University India. 12:00 PM – 1:00 PM Lunch

1:00 PM – 1:45 PM Keynote Tennessee Valley Authority 1:45 PM – 2:30 PM Transformer Manufacturing ABB, Inc.


Presentation will explain the step‐by‐step process of manufacturing work stations for the completion of a transformer. Focus on the important aspects at each area from quality and reliability point of view. Selection of raw materials and latest trends will also be addressed. 2:30 PM – 3:15 PM Understanding Factory Testing Data – Part I

Mark Lachman, Director of Diagnostic Analyses Doble Engineering Company

This presentation briefly describes significance of various electrical production tests with bulk of material arranged around a typical test plan covering all final factory tests as per IEEE C57.12.00‐2010 and C57.12.90‐2010. For each test, there will be an in‐depth discussion of each measurement, physics behind the measurement, setup and test methodology and acceptance criteria. Mark F. Lachman, Ph.D., P.E., has been with the power industry for over 30 years. In 2005, he joined Delta Star in San Carlos, CA, where, as Test Manager, he was responsible for the test department operation. In 2011, he returned to Doble Engineering Company as Director of Diagnostic Analyses. 3:15 PM – 3:30 PM Break 3:30 PM – 4:15 PM Understanding Factory Testing Data – Part II Mark Lachman, Director of Diagnostic Analyses Doble Engineering Company This presentation briefly describes significance of various electrical production tests with bulk of material arranged around a typical test plan covering all final factory tests as per IEEE C57.12.00‐2010 and C57.12.90‐2010. For each test, there will be an in‐depth discussion of each measurement, physics behind the measurement, setup and test methodology and acceptance criteria. Mark F. Lachman, Ph.D., P.E., has been with the power industry for over 30 years. In 2005, he joined Delta Star in San Carlos, CA, where, as Test Manager, he was responsible for the test department operation. In 2011, he returned to Doble Engineering Company as Director of Diagnostic Analyses. 4:15 PM – 5:00 PM Shell‐Form Design & Construction Juan Luis Thierry, Senior Transformer Consulting Engineer Doble Engineering Company 5:00 PM – 5:30 PM Ask the Experts Panel 6:00 PM – 9:00 PM Welcoming Reception

All are invited to join us for our Welcome Reception on Monday, February 1st the Gaylord Opryland. There will be a great dinner buffet, beer and wine, entertainment and a chance to meet and relax with fellow seminar attendees.

Tuesday, February 2, 2016

7:00 AM – 6:00 PM Registration & Information Desk Open 7:00 AM – 8:00 AM Attendee Breakfast

8:00 AM ‐ 8:30 AM Autotransformers Waldemar Ziomek, Senior Global Expert ‐ Power Transformers & High Voltage Insulation CG Global When the primary and secondary voltages are obtained from the same winding, or from two windings which are galvanically connected, such a transformer is called an autotransformer. The autotransformer requires less turns


than a two‐winding transformer. The presentation will focus on fundamentals, design and applications of autotransformers. It will start with basic concept and typical winding arrangements. Next, the voltage variation will be addressed through presentation of different tap winding arrangement in the unit. Magnetic field distributions and resulting impedance at different tap positions will be shown. The selected problems of insulating system will be discussed (e.g. end fed vs center fed HV lead bring out, stresses in the end insulation). Examples of the lightning impulse voltage distributions for different winding arrangements will be shown. Dr. Waldemar Ziomek works for CG Power Systems, as a global senior expert in the area of power transformers. Till 2013 he was employed by CG Power Systems Canada's large power transformer plant in Winnipeg, MB, as Manager of Engineering. He started his employment with CG (then Pauwels) in 1997 as an electrical designer, then in 1999 as an electrical engineering manager, and since 2003 as manager of engineering, responsible for the electrical design, quotation design, product development, mechanical design (internal and external), and controls design. Since 2001 he is also an adjunct professor at The University of Manitoba. 8:00 AM – 10:00 AM Asset Life‐Cycle Decision Making The utility systems require a broad spectrum of equipment for the transmission of electric power from the utility generating stations to distribution substations located near industrial plants and residential areas. Transformers are used in most of the power systems, as generator step‐up transformers; as transmission autotransformers and as shunt reactors. Mobile substations are used by utilities for emergency or temporary power sources. These units are usually a transformer in a package with HV breaker, arresters and LV switchgear mounted on a trailer for easy transport. Power transformers are also used for special industrial application such as electric arc furnace transformers which supply high current, low voltage power to arc furnaces used in steel making. The development and growth of the transformer stemmed from a basic need for low cost electric power generation and transmission, and the question has been always the same: core type or shell type? Both transformer types are suit for essentially the same application, but there are some design features that can make the difference in the long run. The Purpose of this presentation is to identify the main design and construction differences between core‐form and the shell‐form transformers. 8:30 AM – 9:00 AM Mobile Transformers & Substations Marion Jaroszewski, Senior Consultant Delta Star, Inc. Mobile substations and their applications are presented. The design differences between stationary transformer and a mobile unit will be discussed with emphasis on the hybrid insulation and associated with its temperature ratings, losses, cooling system and testing. The mechanical aspects of the trailer design, additional equipment, protection and auxiliary power are also addressed. The examples of mobile units' variations are shown. Marion Jaroszewski’s expertise is in design of transportable (mobile and portable) high temperature transformers and substations as well as core type power, generator step up, auxiliary and grounding transformers, autotransformers and voltage regulators. Mr. Jaroszewski graduated from Technical University of Lodz, Poland with EE degree in 1973. His master thesis was Methods of Calculation of Optimal Dimensions of Active Parts of Power Transformers. He began his professional career with Transformer Manufacturer ELTA in Lodz, Poland. He moved to the United States in 1981 where he worked as a Transformer Engineer for Alamo Transformers in Houston. In 1985 was hired as a Design Engineer by H.K. Porter in Belmont, California and two years later was promoted to Senior Design Engineer position. In 1988, two H. K. Porter transformer plants in Belmont, CA and in Lynchburg, VA were bought by employees and became again Delta Star, Inc. In 1995, Marion was promoted to Manager of Engineering position. He was promoted to Corporate Technical Officer in 2004. The same year he was promoted to San Carlos Operations Manager and to Vice President of the company in 2005. Marion retired at the end of 2009 and currently works part time as a consultant and technical advisor for Delta Star, Inc. He is an active member of IEEE. 9:00 AM – 9:30 AM Generator Step‐Up Transformer Overview


Enrique Betancourt, Technology Planning Manager GE Prolec Enrique Betancourt has a BS in Electromechanical Engineering from the Nuevo Leon State University and a Diplomingenieur in Electrical Engineering (equivalent to the EE Master Degree in the US) from the Technical University of Aachen (RWTH). He joined Prolec in 1989 as member of the technology development staff where he made many technical publications and is co‐developer of several patents. He is currently in charge of developing new technologies at Prolec GE. Mr. Betancourt collaborates with the Graduate School of Electromechanical Engineering of UANL as Assistant Professor for High Voltage Engineering and Electromagnetic Transient Analysis. He is member of several IEEE Transformer Committee Working Groups and is Mexico’s national representative for CIGRE Study Committee A2 “Transformers.” 9:30 AM – 10:00 AM HVDC Waldemar Ziomek, Senior Global Expert – Power Transformers CG Global Dr. Waldemar Ziomek works for CG Power Systems, as a global senior expert in the area of power transformers. Till 2013 he was employed by CG Power Systems Canada's large power transformer plant in Winnipeg, MB, as Manager of Engineering. He started his employment with CG (then Pauwels) in 1997 as an electrical designer, then in 1999 as an electrical engineering manager, and since 2003 as manager of engineering, responsible for the electrical design, quotation design, product development, mechanical design (internal and external), and controls design. Since 2001 he is also an adjunct professor at The University of Manitoba. 10:00 AM – 10:15 AM Break 10:15 AM – 11:00 AM Insulating Materials Basics Lars Schmidt, Technology Lead Center Manager – Insulation ABB, Inc. This session offers an overview of power transformer insulation focusing on cellulose based insulation materials. Both raw materials and the conversion of cellulose to transformer board will be discussed including environmental considerations. A further topic will be the electrical and mechanical properties of pressboard, pressboard laminate and laminated wood. The directional dependence of laminated wood will be compared with laminated pressboard. The presentation will conclude with a short selection of ongoing research and development in the field of transformer insulation. Lars E. Schmidt has a background in Material´s Science and holds a PhD from the Swiss Federal Institute of Technology, Lausanne. In 2006 Lars joined ABB Corporate Research and worked as a researcher in the field of polymer based medium and high voltage insulation. In 2011, Mr. Schmidt took over the position Technology Lead Center Manager for transformer insulation. He is located at ABB’s business unit which produces premium insulation for power transformers in Figeholm, Sweden. His research interest is in the field of cellulose‐based and polymer‐based insulation materials. 10:15 AM – 11:00 AM EMI Diagnostic Testing: Electric Plant Reliability for HV Power and Industrial Plant Assets James Timperley, Principal Engineer Doble Engineering Company This session provides examples of how EMI diagnostics can be used to prioritize condition based maintenance activities for critical High Voltage assets such as motors, generators, transformers, power cables, bus and switchgear. Knowing what components do not need maintenance is just as important as knowing where maintenance resources should be focused. Case studies are presented discussing the success of EMI Diagnostics as applied since 1980. James E. Timperley is currently a Sr. Principal Engineer with Doble Engineering. He has 45 years’ experience in the power industry with an emphasis on diagnostic testing, large electrical rotating machinery and isolated phase bus. Jim


has authored more than 80 technical papers in the areas of applied research, advanced insulation systems, diagnostic testing, failure investigation, inspecting, maintaining and specifying rotating machinery for IEEE, Doble, ASME, CIGRE, EPRI, DEIS, PCIC and the American Power Conference. His work has involved root cause analysis of equipment failures, insulation deterioration mechanisms and developing repair procedures for use at petrochemical and industrial sites as well as in fossil, nuclear and hydroelectric power plants. Mr. Timperley is a Life Fellow of the IEEE and received the 2006 DEIS Dakin Award for the development of EMI Diagnostics for power equipment. He is active in IEEE standards committees, holds a BSEE from Oklahoma State University and is a registered Professional Engineer in the State of Ohio. He has completed Basic Offshore Safety Induction & Emergency Training (BOSIET) for working on off shore rigs. 11:00 AM – 12:00 PM Transformer Cooling Fundamentals Jeff Cooper, Regional Manager Unifin This introductory presentation will provide an overview of pumps, coolers, fans, unit uprating, US and International standards, ancillary and auxiliary systems, thermal constraints, ambient conditions, loading, dynamic modeling, design limitations, leak repairs, and maintenance. Losses in transformers are inevitable. Electromagnetic losses reflect as heat and consequently as elevated temperatures due to thermal resistance. High temperature accelerates aging of insulation paper; the Arrhenius equation shows that the life of a transformer is reduced by a factor of two with 8ºC rise in temperature. The transformer dissipates heat through all three modes of heat transfer mechanisms ‐ conduction, convection and radiation. The predominant mode of cooling is convection. Both radiators and coolers depend primarily on convection for heat dissipation. When is one preferred over the other? So how is the temperature controlled in new transformers with environmentally more friendly oils that are more viscous? The second part of the presentation will address cooling system maintenance. With temperature control being crucial in newer transformers, heat dissipation becomes very important. However, cooling system performance, with or without moving mechanical equipment, deteriorates with age. Even systems without oil‐pumps or fans can fail due to weathering, rusting and fouling. How do we evaluate the health of the cooling system? Technology has improved with time, so what optimized solutions are available? Jeff Cooper is Regional Manager at Unifin. Prior to joining Unifin Mr. Cooper was employed at Westinghouse Electric Corp in their Power Transformer & Circuit Breaker After‐Market Services Group and at ABB in Power Transformer Marketing and in Utility Field Sales. He holds and International B.S. Mechanical Engineering from Pennsylvania State University. 11:00 AM – 12:00 PM Proposed IEEE GIC Guide & Upcoming NERC Documents on Geomagnetic

Disturbance Mitigation

12:00 PM – 1:00 PM Lunch 1:00 PM – 1:45 PM Transportation & Rigging Ian Withrow Barnhart Crane & Rigging The transportation and rigging of a transformer is an important part of the procurement process. In today’s market many of the transformers purchased include delivery to the pad as part of the purchase contract. We will discuss the various modes of transportation (Sea, Inland Water, Rail, and Truck) and detail advantages and limitations of each mode. The second part of the presentation will focus on rigging methods and acceptable practices. In recent years, replacement of existing equipment often involves short outage windows in high hazard environments with tight available work space. The discussion will provide details on methods to change out these components as well as case studies demonstrating how this work can be accomplished in a safe manner.


1:00 PM – 1:45 PM Advanced Transformer Design using Ester‐based fluids Jim McIver, Principal Applications Engineer Siemens High‐temperature liquid immersed transformers are used for a variety of specialist applications. We will look how these specialty transformers are designed, built, and tested. Jim McIver has 40 years of experience in the North American electric power industry. Prior to Siemens' acquisition of VA Tech, he was VA Tech's Technology Director and now serves as Principal Application Engineer. While at Nevada Power, he managed design, procurement and maintenance of transformers, breakers and switchgear. As a GE Senior Application Engineer, he specified phase shifters, provided forensic analysis of transformer field failures and developed gas‐in‐oil diagnostics for sealed‐tank, network transformers. Mr. McIver is member of Eta Kappa Nu, IEEE Transformer Committee, and is Professional Engineer in the State of New York. He earned his MSEE from Rensellaer Polytechnic and is a New York state registered P.E. 1:45 PM – 2:30 PM Transformer Operations & Loading Phillip Prout National Grid, USA The presentation identifies key areas associated with loading Power Transformers designed for a 65 C rise with thermally upgraded insulation. The information was gathered from multiple standards, loading guidelines and actual case studies. The document can be referred to when specifying new transformers, evaluating factory thermal testing, rating transformers using thermal programs and assist in operating the transformers while in service. Highlights of a few case studies to be explorer are: confirming dryness of insulation prior to leaving factory, evaluating factory thermal test results and calculating loading limitations for system control are just a few highlights. 2:30 PM – 2:45 PM Break 2:45 PM – 4:15 PM Transformer Bushing Fundamentals David Geibel, Technical Director ABB Sebastien Riopel, Engineer Hubbel This bushing fundamentals session will cover bushing theory, design, function, terminology, standards, and different insulation technologies. Advantages, disadvantages, and differences in the types of OIP and composite bushings available on the market today will be discussed. Attendees will have a clear understanding of installation, maintenance, and testing procedures, and the challenges that may be encountered when working with OIP and composite bushings. A thorough understanding of the details needed when planning a bushing replacement project will be presented. David Geibel graduated with honors from the State University of New York at Alfred with an AAS in Electromechanical Technology. He graduated Magna Cum Laude from the University of Pittsburgh with a BS in Electrical Engineering. Mr. Geibel worked for General Electric Company starting in the Plastics laboratory working on inventions like bullet proof window. He moved to the high voltage testing laboratory for the Large Transformer Division. While at the high voltage lab, he performed design and development testing on a wide variety of electrical equipment (such as bushings). Mr. Geibel did the first testing done by GE to determine why Type U bushing had rising power factor. He then transferred to the transformer design engineering department where he concentrated on load tap changer application and design. When GE sold the transformer technology to Westinghouse, he took a new assignment with a joint venture between Westinghouse and Reinhausen (MR) as the Quality Manager for the startup venture making load tap changers in North America. Westinghouse asked Mr. Geibel to join the field retrofit engineering group in Pittsburgh, PA where he was a Senior Design Engineer. He eventually moved to Alamo, TN to take the position of Fellow Development Engineer. He was reassigned as Fellow


Product Design Engineer for the ABB Alamo bushing business. Mr. Geibel was the Engineering Supervisor for Delta Star Inc. then returned to ABB Alamo to take his current position as the Engineering Manager. He holds two bushing related US Patents. Several other patents are pending at this time related to bushings and on load tap changers. 4:15 PM – 5:30 PM Load Tap Changer Fundamentals Bernhard Kurth, General Manager Reinhausen Manufacturing, Inc. David Geibel, Engineering Manager ABB, Inc. Energized Load Tap Changers (LTCs), De‐Energized (DETC), Transmission Class, Distribution Class, Resistive, Reactive, and so very much more. This is by far one of the most impressive presentations of the week, and it is jam‐packed with information about history, usage, various designs, operations, maintenance, gas analysis, repairs, failures and components. Representatives of ABB and Reinhausen will be on hand to make presentations and then open the floor for discussion, and most importantly, to field your questions. This extremely practical presentation will allow the attendees to ask about all types of subjects related to the everyday operations, loading, and maintenance of transformer tap changers. Bernhard Kurth, was born in Quito, Ecuador on June 29, 1960. He received a M.S. degree in Electrical Engineering from Rhineland Westphalia Technical University at Aachen, Germany in 1987. Mr. Kurth has been around On‐Load and Off‐Circuit Tap Changers for his entire career. He has been President of Reinhausen Manufacturing in Humboldt, TN since its foundation in 1991. Before joining Reinhausen Manufacturing, Bernhard worked as Area Sales Manager at Maschinenfabrik Reinhausen GmbH in Regensburg, Germany, being then transferred as President of Reinhausen Canada Ltd. to Toronto, Canada in 1990. David Geibel graduated with honors from the State University of New York at Alfred with an Associate’s degree of applied science in Electromechanical Technology. He graduated Magna Cum Laude from the University of Pittsburgh with a Bachelor’s of Science degree in Electrical Engineering. Dave worked for General Electric Company (GE) from 1974 until 1987. He started in the Plastics laboratory working on inventions like bullet proof window until 1976 when he moved to the high voltage testing laboratory for the Large Transformer Division. While at the High Volt lab, Dave performed design and development testing on a wide variety of electrical equipment (such as bushings). Dave did the first testing done by GE to determine why Type U bushing had rising power factor. In 1979, Dave transferred to the transformer design engineering department where he concentrated on load tap changer application and design. When GE sold the transformer technology to Westinghouse in 1986, Dave took a new assignment with a joint venture between Westinghouse and Reinhausen (MR) as the Quality Manager for the startup venture making load tap changers in North America. In 1988 Westinghouse asked Dave to join the field retrofit engineering group in Pittsburgh, PA where he was a Senior Design Engineer until 1996. At that time Dave moved to Alamo, TN to take the position of Fellow Development Engineer. In 2002 he was reassigned as Fellow Product Design Engineer for the ABB Alamo bushing business. In 2004 Dave became the Engineering Supervisor for Delta Star Inc. Dave returned to ABB Alamo in 2006 to take his current position as the Engineering Manager. Dave holds two bushing related US Patents. Several other patents are pending at this time related to bushings and on load tap changers. 5:30 PM – 8:00 PM Industry Expo & Reception

Wednesday, February 3, 2016 6:00 AM – 6:00 PM Registration & Information Desk Open 6:00 AM – 8:00 AM Attendee Breakfast 7:00 AM – 8:00 AM What’s in the Box? (Designed for 3‐Day Transformer Maintenance Program Seminar Attendees)


Troy Kabrich, General Manager – Services Division SPX Transformer Solutions, Inc.

Power transformers demand a higher degree of care during installation. The large investment in the transformers and their importance to the power system demonstrates the need for careful field preparation for service. This presentation will highlight recommendations for the proper receipt, inspection, field assembly, oil processing, and acceptance testing of large liquid immersed power transformers rated 10 MVA or greater or with high voltage windings rated 69 kV and above. Basic transformer field installation topics and standards will be reviewed to include inspections, equipment requirements, assembly and field dry out techniques, determination of insulation moisture concentration, provisions for cold ambient temperature processing, vacuum filling processes, and acceptance testing. Troy Kabrich is currently the Vice President & General Manager for the Goldsboro, NC Manufacturing Plant and the Service and Components Division of SPX Transformer Solutions, Inc. During his twenty‐five years of industry experience, Mr. Kabrich has held positions as a Plant Manager, Director of Field Services, Repair Operations Manager, Field Service Engineer, and Sales Engineer. He has published articles for T&D World and Utility Automation and Engineering magazines, was author of Installation and Maintenance Chapter of Third Revision of the Electric Power Transformer Engineering Handbook, and is a frequent contributor to industry training programs. Troy has a Bachelor of Science degree in electrical engineering from Rose‐Hulman Institute of Technology. 8:00 AM – 9:30 AM Transformer Assembly, Oil Processing & Commissioning

Troy Kabrich, General Manager – Services Division SPX Transformer Solutions, Inc.

This presentation will highlight recommendations for the proper receipt, inspection, field assembly, oil processing, and acceptance testing of large liquid immersed power transformers. Transformer field installation processes and standards will be reviewed to include impact recorders, equipment requirements, assembly operations, field dry out techniques, determination of insulation moisture concentration, provisions for cold ambient temperature processing, vacuum filling processes, and acceptance testing. Troy Kabrich is currently the Vice President & General Manager for the Goldsboro, NC Manufacturing Plant and the Service and Components Division of SPX Transformer Solutions, Inc. During his twenty‐five years of industry experience, Mr. Kabrich has held positions as a Plant Manager, Director of Field Services, Repair Operations Manager, Field Service Engineer, and Sales Engineer. He has published articles for T&D World and Utility Automation and Engineering magazines, was author of Installation and Maintenance Chapter of Third Revision of the Electric Power Transformer Engineering Handbook, and is a frequent contributor to industry training programs. Troy has a Bachelor of Science degree in electrical engineering from Rose‐Hulman Institute of Technology. *8:00 AM – 8:45 AM Corrosive Sulfur Paul Griffin, Vice President Consulting and Testing Services Doble Engineering Company Corrosive sulfur oil is known to have caused problems in electric apparatus and accessories. The problem is complex and continued research is necessary. However, some significant improvements in understanding have led to better tools to detect possible problems and help avoid them. Two test methods for oils have been developed that are useful for detecting potential problems based on different failure modes. In‐service oils can be tested and evaluated based on the application. Mitigation methods such as passivation are being evaluated. Paul Griffin is Doble Engineering Company’s Vice President of Consulting and Testing Services. Mr. Griffin has been with Doble since 1979 and prior to his current role has held various positions including Laboratory Manager and Vice President of Laboratory Services. Since joining Doble, Mr. Griffin has published over 50 technical papers pertaining to testing of electrical insulating materials and electric apparatus diagnostics. He is a Fellow of ASTM and a member of Committee D‐27 on Electrical Insulating Liquids and Gases. He was formerly ASTM Subcommittee Chairman on Physical Test, ASTM Section Chairman on Gases in Oil, and the Technical Advisor to


the U.S. National Committee for participation in the International Electrotechnical Commission, Technical Committee 10, and Fluids for Electrotechnical Applications. Mr. Griffin is a member of the IEEE Insulating Fluids Subcommittee of the Transformer Committee. 8:45 AM – 9:30 AM Transformer Design Reviews Bill Griesacker, Transformer Consulting Engineer Doble Engineering Company An effective procurement system utilizes the preapproval process to identify suitable power transformer vendors and a design review to establish an agreed upon design and procurement process. This preapproval approval process should include factory qualification audits which are essential to confirm a manufacturer’s ability to meet a purchaser’s requirements and expectations. The design review is performed to establish an agreed upon design and to facilitate the procurement process. That the supplier is capable of meeting the purchaser’s procurement specifications is confirmed during this process and the procurement process is expedited by bringing the purchaser and supplier together on the technical details of the purchased transformer. Bill Griesacker is a member of Doble Engineering Company as a transformer engineer working on projects that include factory inspections, condition assessment, design reviews, failure analysis and general consulting. He previously worked for Pennsylvania Transformer Technology Inc., where he held various positions including Engineering Manager. His work included high voltage insulation design, transient voltage modeling of power transformer windings and various LTC and DETC switch development projects. Prior to this, he was employed by the Westinghouse Electric Company, working on synchronous generator projects as a member of the Generator Engineering Department. Mr. Griesacker started his career with Cooper Power Systems in large power transformers and later worked in the Kyle Switchgear, Vacuum Interrupter Department. He has earned a MS in electric power engineering from the Rensselaer Polytechnic Institute and a BS in electrical engineering from Gannon University. Mr. Griesacker is an active member of the IEEE. 9:30 AM – 9:45 AM Break 9:45 AM – 11:15 AM Transformer Field Testing Robert Brusetti, Director, Client Service Engineering Doble Engineering Company Thermal imaging, offline tests, online tests. Transformer Turns Ratio, Megger, Power Factor, Capacitance, Leakage Reactance, Winding Resistance, Excitation Current, Sweep Frequency Response Analysis, Electromagnetic Interference. Robert Brusetti received his BS in Electrical Engineer degree from the University of Vermont in 1984 and a MBA from Boston College in 1988. He has been employed at Doble Engineering Company for twenty years and currently serves as Director of Client Service Engineering. Prior to his present responsibility he has held positions as Product Manager and Field Engineer. Mr. Brusetti is a licensed Professional Engineer in the state of Massachusetts. 11:15 AM – 1:45 PM Industry Expo & Lunch

1:45 PM – 2:45 PM Insulating Fluid Basic: Dissolved Gas Analysis, Oil Sampling, LTC DGA & Oil Analysis Doble Engineering Company This presentation will provide information on insulating fluids, focusing on various characteristics and the most common analytical tests performed on insulating fluids to assess the condition of the insulating fluid and health of the transformer. Important aspects of the sampling process for insulating fluids will be covered to help ensure that a representative sample of the bulk insulating fluid is obtained. 1:45 PM ‐ 2:45 PM Iso‐Phase Bus Circulating Current and Overheating Issues Gary Whitehead, Power Project Specialist


Electrical Builders Inc. The purpose of this presentation is to educate the audience in the evolution of the design of isolated phase bus, and how circulating currents affect those different designs. Circulating currents can cause havoc with an isolated bhase bus system, and the basic design of the bus will dictate the best practices that have been identified for analysis, inspection, cleaning and maintenance of those bus systems. The isolated phase bus systems have largely been ignored, forgetting it is the only system critical component in the power plant that does not have redundancy. With a renewed focus on the systems, many plants do not realize how different designs can cause different problems. This presentation will provide information on the different isolated phase bus designs and how circulating currents create different problems with those designs. Gary Whitehead is the Power Projects Specialist at Electrical Builders Inc. (EBI). Since coming to EBI his main focus has been working on projects such as new installation, retrofits as well as design improvements and value engineering on existing systems. Mr. Whitehead has attended numerous colleges studying industrial and architectural drafting and design. He has over 7 years of experience in this industry working for AZZ/Calvert, a designer and manufacturer of Iso‐Phase systems as an Engineering Technical Coordinator and also in their Installation Services as a Designer/Quotation Specialist and Project Manager. 2:45 PM – 3:30 PM Workforce Automation & Transformer Test Data Management Doble Engineering Company 2:45 PM – 3:30 PM Cable Diagnostic Testing Kent Brown Cable systems in industrial facilities and generating stations are vital and robust assets which have historically required minimal attention. As facilities age, failure of those systems can lead to lost productivity, long outages and large unanticipated capital outlays. In order to avoid such surprises, users naturally turn to test and monitoring options. However, the number of available test options can be daunting. In addition, most techniques were developed for the T&D marketplace limiting their usefulness in the industrial environment. Industrial users must consider the impact of their insulations and shielding designs. This session will provide the user a template for identifying the optimum method or methods for evaluation their system. 3:30 PM – 3:45 PM Break 3:45 PM – 4:45 PM Transformer Oil Maintenance: Dehydration, Purification and Reclamation Greg Steeves, General Manager Baron USA, LLC Transformer life depends mainly on the condition of the liquid & solid insulation. The liquid insulation can be maintained and restored with purification & reclamation. The solid insulation however is difficult to maintain directly. Various technologies and techniques are available to maintain the insulation (both directly & indirectly). Appropriate selection and application of transformer dry‐out technologies and techniques can extend transformer life, reduce downtime and save money. These technologies and their field applications will be discussed during this presentation. Greg Steeves is General Manager and principle engineer of Baron USA, LLC. Baron is the premier provider of transformer dry‐out and dielectric fluid processing systems for OEM’s, utilities and field service organizations worldwide. Greg joined Baron USA as Engineering Manager in 1987. He is currently responsible for managing the daily operations and overseeing the application, engineering design and manufacturing of oil purification equipment, vacuum chambers, vapor phase processing and transformer dry‐out equipment. He earned his degree in Mechanical Engineering from Tennessee Technological University and is licensed in the state of Tennessee. 3:45 PM – 5:30 PM Advanced Insulating Fluid Topics

International standards (IEEE C57.154 and IEC 60076‐14) John Luksich, Principal Engineer


Cargill, Inc. Standards have recently been published, providing specific requirements and guidance to apply the enhanced, high temperature insulation system capabilities enabled via natural ester dielectric fluids. The supporting technical data, application experience, and technical impact of utilizing these capabilities will be presented. John Luksich is a Principal Engineer with Cargill Industrial Specialties, focusing on natural and synthetic ester dielectric liquids. Prior to Cargill, he spent 15 years as a Senior Engineer with Cooper Power Systems. Mr. Luksich received a B.Sc. in Chemistry in 1980 and M.Sc. in Materials Engineering in 1990, both from the University of Wisconsin. He is active in the ASTM D27 Committee on Electrical Insulating Liquids, as well as multiple Working Groups of the IEEE PES Transformer Committee.

Naphthenic Mineral Insulating Oil Manufacture, Additives & Storage Jimmy Rasco, Vice President – Global Base Oil Technology Ergon, Inc. This portion of the panel will cover Naphthenic Mineral Insulating Oil Manufacturing, Additives and Storage. Naphthenic oils have been used as transformer insulating oil successfully for many years. They have heat transfer and low temperature properties that make them well suited for this application. This paper will review some history of naphthenics use as insulating oil and manufacturing processes that refiners employ to produce them. It will review how refining impacts the type, quality and performance of the oils in transformers along with different additives that can impact performance. It will also look at transformer oil is stored to ensure its integrity for delivery.

Jimmy Rasco has responsibility for quality and development of naphthenic and paraffinic base oils. He has worked with Ergon for 20 years and has 40 years of experience in Quality Control and Technical Support of petroleum refined products. He has a BS degree in Chemistry from Alcorn State University. Jimmy is a member of the American Chemical Society, CIGRE, IEEE, IEC, ANSI TAG to IEC TC 10 and ASTM where he serves as Chairman of Subcommittee 27.01 for Mineral Oil. He has served on numerous Maintenance Teams and Working Groups for International organizations governing transformer oil. Isoparaffinic Transformer Oils Chris Armstrong, Sr. Technical Services Advisor Petro‐Canada Lubricants Inc. Catalytic dewaxing technology has led to the development of isoparaffinic transformer oils with desirable physical and chemical properties. Severe refining processes produce isoparaffinic oil that has excellent additive response and is virtually corrosive‐sulphur free. These properties make isoparaffinic base oils ideally suited for transformer oil applications in various operating environments. The technologies available for the production of isoparaffinic transformer oils will be discussed in this presentation, with an emphasis on factors that have led to technological improvements in the industry. Chris Armstrong is Sr. Technical Services Advisor for Petro‐Canada Lubricants’ Luminol Transformer Fluid product line. He has worked for Petro‐Canada for over 20 years and has held positions in Refinery Operations, Sales, Research & Development and Technical Services. Currently as a Sr. Technical Services Advisor, he is a voting member of ASTM Committee D27 on Electrical Insulating Liquids and Gases. He holds

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Service of Indiana) as an entry level engineer. After receiving his BSEE from Purdue University he was promoted to Project Engineer and then Manager of Technical Services in their Northern Division responsible for construction, maintenance and metering. After merging with Cincinnati Gas and Electric and forming Cinergy Corporation, Mr. Youngblood became Senior Engineer responsible for implementing their CMM System “Maximo” and developing their condition‐based maintenance program. He went on to become Supervising Engineer for Substation Services. In 2004 Mr. Youngblood joined American Electrical Testing Company as Regional Manager of their Midwest office. He obtained his NETA 3 certification and went on to perform maintenance and testing in utility and industrial environments. He joined Doble Engineering Company in 2010 as Principal Engineer in the Client Service group.

On‐Site Transformer Core Rewind Cheryl Basel, GE Industrial Solutions – Repairs Senior Sales Manager GE Energy Management Cheryl Basel is a graduate of the Keiser University with Bachelor Degrees in Business Management and Business Administration. She has worked for Ohio Transformer, SD Myers, GE’s Bradenton repair facility and GE Industrial Solutions in roles of increasing responsibility including Global Transformer Sales Leader for the transformer repairs and services segment. Ms. Basell left GE for a Sales and Marketing role at Southwest Electric Company, She returned to GE as the Repairs Senior Sales Manager for Transformer Services in 2014. She has over 17 years of transformer experience including manufacturing, and remanufactuirng of core form and shell form transformers up to 1000 MVA, 525 kV, repairs and upgrades of transformers, field service and failure/risk analysis. Cooling Systems Update Vasanth Vailoor, Engineering Manager Trantech Radiator Products

With temperature control being crucial in newer transformers, heat dissipation becomes very important. However, cooling system performance, with or without moving mechanical equipment, deteriorates with age. Even systems without oil‐pumps or fans can fail due to weathering, rusting and fouling. How do we evaluate the health of the cooling system? Technology has improved with time, so what optimized solutions are available? Vasanth Vailoor is a Mechanical Engineer from the Indian Institute of Technology with specialization in Heat Transfer and Fluid Dynamics. He has now been with Trantech Radiators as the Engineering Manager for over ten years. Before that he has been associated with industries as diverse as Aviation, Cryogenics and Renewable Energy focused on modeling, simulation and testing. His wide range of interests and depth of knowledge in various topics help bridge diverse technologies leading to simple optimized solutions. He has published over ten papers while still maintaining an active commercial career.

8:00 AM – 9:00 AM Tap Changer Controls David Aldrich, Regional Sales Manager Beckwith Electric David Aldrich, IEEE Senior Member, is the Application & Regional Sales Manager for the Central U.S. for Beckwith Electric. He joined Beckwith Electric in 2012 with over 30 years of experience in nearly all aspects of electric power systems. Prior to Beckwith Electric, Mr. Aldrich had management roles at Schneider Engineering, Origin Geo Systems, Texas Power and Light/TU Electric (now Oncor) and TU Electric’s Distribution Information Systems. Mr. Aldrich has


published several papers and presented at various conferences related to electric power planning and operation. He is very active in industry organizations, serving as president of local chapters of IEEE‐PES and TSPE. 9:00 AM – 10:00 AM Introduction to Transformer Protection Ed Khan, Director of Protection Training & Research & Development Doble Engineering Company This presentation deals with the protection of a transformer against short circuits, through faults and several other abnormal system conditions. As part of this presentation, application of transformers in a harmonic environment will also be discussed. Transformers are very critical and expensive asset applied in a power system. Hence, extreme care and attention should be paid to make sure that transformers are adequately protected. Timely removal of transformers in the event of abnormal system condition is a deciding factor between replacing or repairing a transformer. Ed Khan is the Director of Protection Training and R&D at Doble Engineering. He has been with Doble for 7 years. At Doble, he had also worked as the Product Manager for the protection testing product line. Prior to joining Doble, Ed had worked for several companies such as GE, Westinghouse, ABB, KEMA, SEL and others. He has a very broad background in power systems and has performed system studies, relay application, coordination studies, and equipment sizing for power plants. He has presented various courses and seminars on protection, and harmonics both in US and overseas. 10:00 AM – 10:15 AM Break 10:15 AM – 11:00 AM Factory Repair Pravin T. Khanna, Global Product Manager ABB, Inc. Pravin Khanna is the Global Product Manager for Transformer Repairs for ABB’s Transformer Remanufacturing and Engineering Services (TRES) organization based out of St. Louis, MO. He is responsible for developing effective processes supporting transformer factory and onsite repairs. Pravin completed his electrical engineering from Mumbai India and studied MBA In USA. He began his career 24 years ago as production engineer for large power transformer factory in India. In 1996 Pravin joined a large Power transformer unit in Israel and worked as specialist for large power transformers. Pravin joined ABB in year 2000 in Canada and was responsible for Small power and larger power transformer . In 2006 Pravin moved to Saint Louis and joined ABB transformer services as repair business manager for North America. Since 2010, Pravin is responsible globally for transformer repair services for factory and onsite repair. 10:15 AM – 11:00 AM LTC Maintenance & Extending Maintenance Cycles Jim McLean, Director of LTC Business North American Substation Services This presentation is centered on the maintenance of LTCs and what you can do to aid in extending your maintenance cycles. It will cover items such as; filtration, coke formations, contact upgrades, contact alignment and understanding your LTCs needs. Jim McLean is the Director of LTC Business for North American Substation Services LLC. He has held key positions in the service, sales and marketing areas for Reinhausen Manufacturing and Waukesha Electric Systems. He has 30 years of experience in the service and support of manufacturing, maintenance and field operations. He has16 years of experience in Field Service Management. He has traveled the United States, Canada, The Caribbean and Europe as a computer programmer specializing in interface and communications. He is a training class developer and instructor for LTC training classes where he has instructed over 120 classes and 950 students across the United States and Canada. He has traveled to Venezuela to lead in a LTC failure analysis. Jims enjoys working with youth sports and teaching proper techniques for football and basketball. He is the past President, V President and Senior Division V President for Medina Football & Cheerleading League where he lead in the activities of 12 youth league football and cheerleading teams. He has been a head basketball coach with the Boys & Girls Club of America in North Carolina. He is an active


board member of the local high school athletic booster club. Jim is originally from North Carolina where he attended both Central Piedmont Community College and Gaston College.

11:00 AM – 12:00 PM Transformer Intelligent Condition Monitoring Solutions Doble Engineering Company 11:00 AM – 12:00 PM LTC Maintenance Requirements and Steps for In‐Tank LTC

Bernhard Kurth, General Manager Paul Shuttleworth Reinhausen Manufacturing Inc.

Bernhard Kurth was born in Quito, Ecuador on June 29, 1960. He received a M.S. degree in Electrical Engineering from Rhineland Westphalia Technical University at Aachen, Germany in 1987 and has been around On‐Load and Off‐Circuit Tap Changers for his entire career. He has been President of Reinhausen Manufacturing in Humboldt, TN since its foundation in 1991. Before joining Reinhausen Manufacturing, Mr. Kurth worked as Area Sales Manager at Maschinenfabrik Reinhausen GmbH in Regensburg, Germany, being then transferred as President of Reinhausen Canada Ltd. to Toronto, Canada in 1990. 12:00 PM – 1:00 PM Lunch 1:00 PM – 2:00 PM Panel Group Presentations: Transformer Fleet Health Assessments 1:00 PM – 5:00 PM Advanced Transformer Field Testing & Diagnostics This advanced session expands on Wednesday’s session and delves into greater detail on the following subjects with the experts from Doble.

Basic Insulation Theory (Cap/PF) Transformer and Bushings – Power Factor & Capacitance Robert Brusetti; Doble Engineering Company

Single Phase Exciting Current and Loss Mark Lachman; Doble Engineering Company

Leakage Reactance Robert Brusetti; Doble Engineering Company

SFRA Mark Lachman; Doble Engineering Company

2:00 PM – 2:45 PM Mobile On‐Site Transformer Testing with Static Frequency Converters High Volt 2:45 PM – 3:00 PM Break 3:00 PM – 5:00 PM Panel Group Presentations: Transformer Risk Mitigation & Failure Analysis

Transformer Risk Mitigation – An Insurer’s Perspective Bill Bartley, Special Engineering Consultant HSB The insurance industry provides utilities and other owners with insurance coverage for many different types of transformers and transformer applications. The transformers vary in size, design, construction, age, and operational environments. But regardless of the type or application, there are some common


key elements of risk mitigation plans that are imperative to the long life of a transformer. Key elements of the plan can range from well‐known maintenance practices to “expert” monitoring systems. This presentation will discuss the key elements, from an insurer’s perspective. William Bartley has over 40 years experience with large electrical apparatus found in utilities and industrial plants. He joined Hartford Steam Boiler in 1971 and established many of the HSB Engineering standards for electrical power apparatus. In 2012, he retired from HSB, and currently serves as a special Engineering Consultant. Mr. Bartley is a Registered Professional Engineer in Connecticut, and an IEEE Fellow, serving for three years on the IEEE Standards Board, as well as several Standards Board committees. He was Chair of IEEE Power & Energy Society (PES) Standards Coordinating Committee, a member of the PES Technical Council. He is also a Member of the PES Transformers Committee, where he is an officer, and Chair of their Standards Subcommittee and a seasoned presenter on electrical apparatus. Root Causes of Failures Bill Griesacker, Transformer Consulting Engineer Doble Engineering Company Forensic examinations are conducted for a number of reasons; however, the end goal is typically to determine the root cause of the failure. Often this examination involves the review of historical operating conditions prior to the failure and the disassembly of the failed transformer in search of supporting evidence. Case studies will be presented. Bill Griesacker is a member of Doble Engineering Company as a transformer engineer working on projects that include factory inspections, condition assessment, design reviews, failure analysis and general consulting. Mr. Griesacker holds an MS in electric power engineering from the Rensselaer Polytechnic Institute and a BS in electrical engineering from Gannon University. He is an active member of the IEEE, PES Transformers Committee where he holds positions in several working groups and subcommittees. Forensic Decommissioning Anne Bailey A‐Line E.D.S. Each transformer recycling project is unique based on the transformer design, location and circumstances for removal. This presentation will provide project examples to showcase on‐site removal options and expectations as well as showcase the specialized equipment available to aide in the detailed assessment of power transformers. Project examples will include premature transformer failure assessment as well as procedures for obtaining samples during routine transformer replacement projects to aide in condition assessment initiatives. Anne Bailey has been with A‐Line E.D.S. managing transformer recycling projects for the past 10 years. She has experience contracting, evaluating and managing on‐site transformer dismantling projects to provide turnkey services including the safe and environmentally sound disposal of power transformers including specialty services for forensic decommissioning. Risk Management During Maintenance Activities Using Internal or Outsourced Resources Don Dorris, Operations Engineer III


Nashville Electric Services

Don Dorris is Operations Engineer III over the Power Group for Nashville Electric Service in Nashville, TN, involved in the power transformer specifications, factory testing and failure teardown inspections. He oversees engineers and technicians involved in installing, commissioning, operating, modifying, testing, analyzing and decommissioning substations, analyzes test results on power transformers and circuit breakers and recommends courses of action and develops and calculates the condition assessments on the power transformers and circuit breakers. He also develops testing and operating standards for NES Operations. He has been with NES for 20 years and is a registered Professional Engineer in the State of Tennessee and a member of the IEEE Power Engineering Society and Standards Society, active in the IEEE Transformer Committee meetings. Mr. Dorris received his Bachelors degree in Electrical Engineering at Memphis State University with a minor in Mathematics and his Masters Course work in Electrical Engineering at Tennessee State University. Mr. Dorris got his start in the US Navy where he worked as an Aviation Electrician and then as an Aviation Electrical Instructor for US Navy & Marine personnel. He transferred from the US Navy to the Tennessee Army National Guard and worked in various capacities as Communications Officer at various levels. He retired from Military Service in 2001 at the rank of Captain. He was also an Electrical Systems Instructor for Northrup Grumman on the B2 Bomber and instructor of several courses at San Diego Community College and ITT Technical Institute. 5:00 PM – 5:30 PM Ask the Experts Panel – Anything Transformer Related

OPTIONAL LABORATORY SEMINAR

Friday, February 5, 2016 6:00 AM – 4:00 PM Registration & Information Desk Open 6:00 AM – 7:00 AM Attendee Breakfast 7:00 AM – 4:00 PM Transformer Condition Assessment Using Laboratory Diagnostics

David Koehler, Manager Laboratory Services Doble Engineering Company

This one‐day session provides students with a thorough understanding of how to assess the condition of electrical insulating materials and transformers. Dissolved gas‐in‐oil analysis – This is the single most important diagnostic test for transformers. This presentation reviews how the test is performed, how to distinguish between normal gassing behavior and problems, and how to evaluate trends. Practical case studies and examples are used to illustrate theoretical concepts. Seminar participants will be quizzed (with class participation) on their understanding in diagnosing 12 cases. Water in Transformer Oil – Assessing how dry a transformer is requires more than a water in oil test. Learn how to assess the wetness of the transformer insulation system and why you need to know the operating temperature at the time of sampling. This session discusses water migration in transformers and how water affects the ability to overload them. Examples are provided. Condition assessment of cellulosic insulation – The analysis of the condition of the paper insulation has changed quite a bit in the past 10 years. Learn how the solid insulation ages and how to assess the condition of the paper and pressboard insulation and its remaining life. Case studies are given to illustrate the distribution of paper aging in transformers and how operation and maintenance can influence it. Metals in oil – This presentation provides an understanding of the importance of metal‐in‐oil tests as a diagnostic. To be able to use the information, the correct test must be specified – learn the difference between dissolved and particulate metals and when to choose each test. Case studies are given.


Quality of new and service aged oils – Background information is provided on the properties of transformer oil. The presentation includes how to specify and evaluate new oils, what tests to perform and how to evaluate in‐service oils. Aging characteristics of insulating materials ‐ Aging is discussed in sections on oil and paper which provides information on how to increase the life of transformers. There are a number of factors that accelerate the aging of the insulation system that can be controlled. This session provides information on when to reclaim or replace oil and gives specifications for reclaimed oil. Load tap changer and oil circuit breaker diagnostics – This presentation gives the latest information on diagnostics for load tap changers (LTCs) and bulk oil breakers. Case studies are provided. Sampling – The presentation discusses how to save money on your sampling program through proper training and what common pitfalls to avoid. Proper sampling preparation, practices, and equipment are given.

David Koehler received his Bachelor’s Degree in Chemistry from Indiana University and his M.B.A. from Indiana Wesleyan University. He has over 16 years of experience in the testing of insulating fluids and management of analytical laboratories. He has provided numerous technical presentations and published technical articles within the power industry. David has the following industry affiliations: Doble Engineering Insulating Materials Committee Asst. Secretary, Director IEEE‐Central Indiana Section, IEEE Region 4 Treasurer, IEEE Region 4 Strategic Planning Committee, Senior Member IEEE, ASTM D‐27 Technical Committee on Electrical Insulating Liquids and Gases and in 2011 was an Executive Committee Member of the Indiana American Chemical Society and remains active within ACS.