In electrical engineering, a protective relay is a relay device designed to trip a circuit breaker when a fault is detected. Its main purpose is to safeguard electrical equipment like transformers, generators, and transmission lines from damage due to. Power System Protective Relays: Principles & Practices Protective Relays - Technical Seminar Nov 2016 - Copyright: IEEE 1 Power System Protective Relays: Principles & Practices Presenter: Rasheek Rifaat, P. Eng, IEEE Life Fellow IEEE/IAS/I&CPSD Protection & Coordination WG Chair Jacobs Canada. An electrically operated switch like a relay plays a key role in controlling an electrical circuit through an independent low-power signal, otherwise used where a number of circuits should be controlled through the single signal. First, relays were used as signal repeaters within long-distance. Long term cost reduction (TCO) for trainings and maintenance by reduce variety of relays A fast and selective arc fault mitigation for air-insulated LV & MV switchgear and Relion protection and control relays and sensor technology protect staff and plant facilities for many years. Protection relays have a crucial role in maintaining the safety, reliability, and integrity of electric networks. They recognize problems before they become serious. This decreases the frequency of operation in production, avoids equipment damage, and guarantees a continuous power source.
