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.
First Trip Circuit Breaker Testing & Analysis
Wednesday, March 2, 2016, 1:00-2:00pm US EST
Presented by: Jozef Levi, Principal Application Engineer
The majority of Circuit Breakers, especially high voltage circuit breakers above 169 kV, stay in the closed or open position for a very long period of time. The Circuit Breaker and its operating mechanism represent a mechanical device with moving parts. Without exercise, lubricated parts can have higher friction during the first-operation than after multiple operations. Measuring the first trip of a circuit breaker will show how the breaker would have operated in a real situation. Trip coil current signatures provide an indirect view of circuit breaker operation and its condition.
Doble Testing of Two-Winding Transformers
Wednesday, March 4, 2016, 1:00-2:00pm US EST
Presented by: Daniel Vaughn, Client Service Engineer
Power factor and capacitance testing of the overall insulation of a two winding transformer is a diagnostic tool that can help identify the condition of the transformer. This webinar will provide a review of the procedures for power factor testing a two winding transformer as well as analysis of the test results.