Analysis of a differential and overcurrent operation on a 345KV high voltage line reactor

Since differential relays offer solutions for multiple applications, one can conclude that the relay engineer must deeply understand not only the element behavior, but also how each relay calculates its protection functions for the given application. This paper has described the behavior of a reactor energization and the response of two different differential relays. In addition, this paper has provided information that equips the customer and settings engineer with the necessary information to properly avoid operations during in-rush conditions.