45 minutes presentation includes 10 minutes of Q&A.
12:00 am - 12:45 am ET
Intellirent
Proper Bushing Assessment for Power Transformers
Transformer bushings are one of the most critical components of a transformer. Up to 20% of major failures on high-voltage transformers can be related to bushings, with almost half resulting in catastrophic failures, such as explosions, fire, or oil spillage. It is well known in the industry that under normal circumstances, a transformer will outlast the bushings two to three times over, requiring timely bushing replacement. The key to knowing when to replace your bushings depends on the integrity and thoroughness of your routine testing or monitoring process. In this session we will present the latest in industry standards and test recommendations for bushing condition assessments to minimize the possibility of failure.
12:45 am - 13:30 pm ET
Zensol
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.
13:30 pm - 14:15 pm ET
Dynamic Ratings Inc
The Essentials of Transformer Monitoring
Transformer monitoring allows utilities to extend the life of aging assets and help prevent unexpected outages. In this session, we will take a deeper look into the essential monitoring that should be applied to any liquid-immersed transformer. We will review temperature monitoring, OLTC monitoring and communications. We will discuss what to do if alarms arise and how to structure a response plan to facilitate maintenance.
