K-DAR Directional Comparison Blocking System Manual

This document describes the operation and equipment complement of the K-DAR directional comparison blocking system for power line protection, focusing on how tripping relays and carrier signals coordinate to clear internal faults while blocking tripping during external faults. It details phase and ground fault tripping mechanisms, transmitter control logic, and the use of directional relays, timers, and auxiliary components to ensure high-speed fault clearing and system reliability.