Relay protection is essential to ensure the stability, reliability, and safety of electrical power systems. 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. 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. In HV (High Voltage) and MV (Medium Voltage) substations, relay protection safeguards critical assets such as transformers, circuit breakers, and lines. Its main purpose is to safeguard electrical equipment like transformers, generators, and transmission lines from damage due to. A protective relay is an electronic device used in power systems to monitor and analyze electrical parameters, such as current, voltage, and frequency, and to take action to protect electrical equipment and ensure system stability. Option “Y1” is selected now when LOP condition occurs, the voltage-polarized directional elements and all dis-tance elements are disabled. This setting for ELOP also disables.