On-line learning series
Doble has been a trusted name of knowledge sharing and collaboration in the electric power industry for nearly a century. Join us for our upcoming webinars to learn more about the latest electric power trends to improve operational efficiency, reduce cost and increase reliability.
Sweep Frequency Response Analysis (SFRA)
Wednesday, September 2, 2015, 1:00-2:00pm US EST
Presented by: Mario Locarno, Principal Client Service Engineer
This short course will take the user through the process of performing SFRA and provide the fundamentals necessary for analysis of SFRA waveforms and indications of mechanical damage. Case studies will be presented.
Leakage Reactance & Short Circuit Impedance Testing
Wednesday, November 4, 2015, 1:00-2:00pm US EST
Presented by: Jim Macdonald, Client Service Engineer
Leakage Reactance measurements can be used as a diagnostic tool to assess the condition of a transformer. The measurements made can be sensitive to winding deformation within a transformer. This webinar will cover the theory behind the leakage reactance test as well as how to perform measurements and analyze data obtained.
An Update on Dissolved Gas Analysis of Load Tap Changers
Wednesday, December 2, 2015, 1:00-2:00pm US EST
Presented by: Rick Youngblood, Principal Client Service Engineer
Dissolved Gas Analysis (DGA) of tap changers has proven to be a very viable means to detect impending problems in LTCs long before they become problematic. In addition, DGA is non-invasive and the samples can be used to analyze health without taking the LTC out of service. Each tap changer has its own gas evolution rate dependent on factors such as design, maintenance intervals and loading. This webinar will describe what each gas means and how that specific gas is relevant to the health of the LTC. We will cover all three common designs – reactive, resistive and vacuum – and explain how LTC normal gassing levels are affected by the type of breathing used.
Protecting Your Transformer
Wednesday, January 6, 2016, 1:00-2:00pm US EST
Presented by: Ed Khan, Director of Protection R&D and Training
Transformers are very critical and expensive assets in a power system network. They need to be protected from abnormal system conditions both external and internal to the transformer. Having the right protection can be the difference between replacing and repairing a transformer. Appropriate protection must be selected, settings must be implemented correctly on the relays and proper maintenance of the protection system must be adhered to. This webinar will focus on some key relay protection functions that are needed to protect your transformer, such as differential protection, restricted earth fault protection, volts per Hertz, and through fault protection.
Transformer Oil Purchase Specifications
Wednesday, February 3, 2016, 1:00-2:00pm US EST
Presented by: Eileen Finnan, Field Services Manager
As part of the transformer oil procurement process, comprehensive specifications need to be in place to ensure the product purchased meets the needs of the end user. One such specification is the Transformer Oil Purchase Specification, also known as TOPS, developed under the auspices of the Doble Oil Committee. TOPS will be reviewed and the significance of the tests and limits specified will be discussed. Potential new additions to the specifications will also be covered as will the other common specifications used in the industry, such as ASTM D3487, IEC 60296 and CSA C50. This webinar will explain the significance of the specifications along with the differences and similarities between the various documents currently used.