HRK and HRP Carrier Directional Overcurrent Ground Relays Manual

This document provides installation, operation, and maintenance instructions for Type HRK and HRP carrier directional overcurrent ground relays used for directional ground fault protection in carrier relaying schemes. It details the construction and operation of the overcurrent elements, directional element, seal-in contactor switch, and operation indicator, along with application notes, internal schematics, and setting recommendations.