The main relay protection functions (overcurrent, directional, differential, distance, etc. ) are briefly explained in this technical article. transmission line faults through the use of communication-assisted protective relaying. Directional distance and overcurrent schemes, interfaced with communication equipment, send and receive logic-based information between relay te minals to determine if the fault is external or internal to the. Underfrequency load shedding (UFLS) is a protection system that senses when frequency is lower than acceptable and directly acts to shed load to correct the frequency drop. Protection systems Protection. IEEE/IAS/I&CPSD Protection & Coordination WG Chair Jacobs Canada, Calgary, AB rasheek. com IEEE Southern Alberta Section PES/IAS Joint Chapter Technical Seminar - November 2016 Protective Relays - Technical Seminar Nov 2016 - Copyright: IEEE 2 Abstract: Protective relays and devices. Communications have been playing an increasingly important role in Protective Relaying. For example, unselective protection operation during a medium voltage network fault will cause an outage for an unnecessarily large number of consumers. While this is bad, It's not a.
