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Electro-Mechanical Protective Relay

The Electro Mechanical Protective Relay was once the backbone of higher voltage electrical power distribution systems. Although digital relays are used today, there remains a high percentage of older equipment that still relies on these legacy devices. Terms like amp tap, time dial, instantaneous, IAC, CO, IFC all are part of the legacy or electro-mechanical relays. This video is based on material found in electrical power training classes at: Brainfiller Courses