High Voltage Distribution Relays are primarily tasked with the important duty of fault detection and protection within the electrical grid. They continuously monitor various parameters, such as current and voltage, and are engineered to detect anomalies that may indicate a fault. When a fault occurs—such as a short circuit or an earth fault—the relay acts swiftly to isolate the affected section of the network, preventing further damage and potential hazards.

    In addition to fault protection, HVDRs offer overload protection capabilities. They can be programmed to trip when the electrical load exceeds predefined thresholds, thereby protecting equipment from damage due to overheating or long-term stress. This function is vital in industrial scenarios where machines and transformers face varying loads.