MELPRO-A Series Digital Protection Relay Brochure

This document introduces the Mitsubishi Electric MELPRO-A Series digital protection relays, which replace conventional electromechanical and transistor types for high-voltage power distribution systems. It highlights key features such as high-speed digital computation, self-diagnosis, output circuit duplication, easy renewal from the E series, and a full line-up of relay types for overcurrent, earth fault, voltage, and other protection functions.