An 800V Power Distribution Relay is an electrical device that helps control and protect the power distribution system by monitoring voltage levels, current flow, and other parameters within the electrical grid. This type of relay is designed specifically for high-voltage environments, such as industrial facilities, power plants, and substations. It works by detecting any abnormalities or faults in the electrical circuit, such as short circuits, overcurrent, or voltage fluctuations, and automatically disconnecting or isolating the faulty section to prevent damage to equipment and ensure the continuity of power supply.