IEEE Standard 80-2013: Guide for Safety in AC Substation Grounding
IEEE Standard for Safety in Electric and Gas Utilities Substations ieee standard 80-2013 pdf
The standard updated the decrement factor ($D_f$) calculations. This factor accounts for the asymmetry of the fault current wave (the DC offset). The 2013 revision provided more detailed methods for calculating the RMS magnitude of the fault current, ensuring the grid is sized for the worst-case thermal scenario. Title: IEEE Standard 80-2013: Guide for Safety in
It is vital to understand that is a guide ; however, it is recognized as the "State of the Art" by regulatory bodies. ieee standard 80-2013 pdf