MICOM P54531AC7M0750M Line Differential and Distance Protection RelayMiCOM Agile P545 Line Differential and Distance Protection Relay Part of the MiCOM P40 platform, the Agile P543, P544, P545 & P546 range of transmission-class protection relays provide comprehensive line protection for differential, subcycle distance and directional earth fault applications, with 1/3 pole tripping.