Power Distribution Relays are designed to protect electrical distribution networks from various faults, such as short circuits, overloads, and ground faults. When a fault occurs in a power distribution system, it can cause significant damage to equipment and disrupt the supply of electricity to consumers. PDRs work by monitoring the electrical current and voltage levels in a circuit. When they detect abnormalities that indicate a fault, they trigger a switch to disconnect the affected section of the network, preventing further damage and restoring stability to the overall system.