This course focuses on transmission to distribution substations and electric distribution circuits (15kV, 25kV and 35kV) arrester applications.
Every year the power delivery industry suffers millions of dollars in losses caused by overvoltage events. Equipment and system related failures are isolated by circuit breakers, fuses or reclosers and create a permanent outage to large areas serving many electric utility customers. This adversely affects the electrical utility’s reliability indices.
This course begins with a discussion of Ohm’s Law components (voltage, current & impedance) regarding surge currents and traveling wave theory then moves to insulating systems. A presentation outlining dielectric clearances and insulating materials provides a basis of understanding as to withstand capability within the electric system. The agenda moves on to an overview of surge arrester classification which includes those used at distribution and substation locations. Attendees will work through application examples that emphasize the various selection criteria. Overvoltage mitigation strategies, including shielding and arrester placement will be explored.
