Protective relaying is the term used in Power System Protection Engineering to describe both the science and operation of protective devices within a controlled strategy. The primary goal is to maximize service continuity and minimize damage to property and personnel resulting from abnormal behaviour in power systems. The focus of the strategy is not solely on protecting equipment from faults, as this is a design function. Instead, the emphasis is on safeguarding the normal system and environment from the impact of a system component that has experienced a fault.
