What percentage threshold should not be exceeded when restoring blocks of load relative to total synchronized generating capability?

The percentage threshold for restoring blocks of load relative to total synchronized generating capability is set at 5%. This specific percentage is critical for maintaining system stability and integrity. When load restoration is performed, it's essential to ensure that the increase in demand does not exceed this threshold to avoid overloading the generating units and causing potential instability in the power grid. Adhering to this limit allows for a controlled and manageable approach to load restoration, ensuring that the generation can respond accurately to the load changes without jeopardizing the overall system reliability. Implementing a threshold higher than this could lead to conditions where the grid becomes stressed, increasing the risk of outages or equipment failures. Thus, maintaining the restoration load at or below 5% ensures that there is a balance between supply and demand, contributing to the safety and efficiency of the power system.