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45 minutes presentation includes 10 minutes of Q&A.
1:00 pm - 1:45 pm
Zensol Automation Inc.
Vibro-Acoustic as a Fast Diagnostic Tool for On Load Tap Changers
The functioning of an On-Load Tap Changer (OLTC) is complex, since a lot of mechanisms are operating at the same time. Classic testing techniques give very little information on mechanical problems occurring inside an OLTC while in service. This presentation shows how the vibroacoustic method is used as a fast diagnosis tool to easily detect mechanical problems in Tap Changers ON-LINE or OFF-LINE, before they create an outage. We will show also how simultaneous correlation of signals recorded by Vibroacoustic, Motor Current and Dynamic Resistance Measurement (DRM) allows a fast understanding of the internal movements of an OLTC. Each of these tests provides a piece of information that creates a complete picture of the OLTC's condition. Finally, we will present a real case showing how the electric utility New Brunswick Power uses this tool to properly adjust an OLTC.
1:45 pm - 2:30 pm
Analyzing Waveform Capture
This webinar will examine the different types of waveforms captured through both online monitoring and offline testing of circuit breakers. Using data collected from the field, several examples of breaker mis operation will be discussed. Also, there will be training provided as to the analysis of these waveforms and how they relate to mechanical components of the circuit breaker.
2:30 pm - 3:15 pm
Causes and Detection of Mechanical Failures in Power Transformers
One of the more common causes of mechanical failure in power transformers comes from exposure to through faults. Most of today’s transformer protective relay systems provide comprehensive monitoring of these potentially damaging events but are rarely activated. In this presentation we will define the characteristics of a through-fault, investigate various proper settings for a through-fault monitor, and present an actual case study of a severely damaged transformer exposed to this condition. We will also present examples of detecting mechanical failure in the transformer as it relates to a through-fault condition.
3:15 pm - 4:00 pm
Transformer Services at Kinectrics, Inc
Moisture Management in Power Transformers
We will examine the impact of moisture residing in the insulation system of a power transformer. Sources of moisture in transformers will be identified, and the effect of this moisture on the operation and lifespan of the transformer will be examined. We will address the issue of how the moisture content in transformers is measured or estimated. Finally, when the presence of excess moisture in a transformer has been positively identified, the methods used in the field to remove moisture from the transformer insulation will be reviewed, noting that the removal of moisture from the paper insulation is much more difficult than simply drying the oil.
Chris joined the Dynamic Ratings team in July 2019.
Prior to his present position, he served as Substation Asset Manager and chairman of the Substation Safety Committee at Memphis, Light, Gas and Water. He has 27 years of experience in the utility industry, primarily focused on the installation, service and maintenance of both substation and distribution equipment. He has done extensive research and published multiple papers concerning the interpretation of dissolved gas analysis testing. Chris is dedicated to assisting customers in finding creative cost-effective solutions for improving safety and reliability across their entire electrical system.
Drew Welton (IEEE Senior) is Vice President of Sales for Intellirent, division of Electrorent, providing strategic leadership to the sales team and creating new business development for the industrial testing, power producing industries.
Fouad Brikci obtained a Doctorate in Electronics in 1977 and a master degree in Electronics, Electrical Engineering and Automation in 1975 both from the University of Bordeaux, France. During his 40 years and more of experience, he was a lecturer at the Ecole Polytechnique in Algiers, Algeria and a researcher at CNRS-LAAS, Toulouse, France. He is currently the President of Zensol Automation, Inc., a company founded in 1990 and located in Montreal, Quebec, Canada. Zensol is a world leader in the field of acoustic diagnostics for circuit breakers and on-line tap changers (OLTC). Zensol also has extensive expertise in conventional maintenance testing applied to high-voltage circuit breakers.
James Cross (IEEE M '79; SM '17) is currently Director of Transformer Services at Kinectrics, Inc. in Toronto, Canada in which role he leads Kinectrics' testing and consulting efforts in the areas of power, distribution, and specialty transformers. As a subjectmatter expert in the field of transformer engineering, he lends his knowledge and experience in transformer design and manufacturing to related project areas at Kinectrics, including asset management, transformer condition appraisals, design reviews, inplant test witnessing, field testing, forensic and failure mode analyses, component and materials evaluation, and transformer diagnostics.