Limit the step, touch, mesh, and transferred potentials to values that prevent fatal electric shocks to personnel walking or working in the substation area.
Historical and practical context
The intent of IEEE Std 80-2013 is to provide comprehensive guidance and information pertinent to safe grounding practices in AC substation design. The standard pursues four specific purposes: ieee standard 80-2013 pdf
Another foundational concept is , which is defined as the maximum potential that a grounding electrode may attain relative to a distant reference point (typically considered to be at zero potential). Under fault conditions, a large current injected into the grounding grid causes the entire substation ground potential to rise relative to the surrounding earth. The GPR must be carefully managed to ensure that touch and step voltages remain within safe limits, and to prevent hazardous voltage transfer to remote locations via communication lines, metallic pipelines, or other conductive paths. Limit the step, touch, mesh, and transferred potentials
| | Year | Significance | |------------|----------|------------------| | AIEE Guide | 1961 | Original publication as AIEE Guide for Safety in Alternating-Current Substation Grounding | | IEEE Std 80 | 1976 | First IEEE edition | | IEEE Std 80 | 1986 | Second IEEE revision | | IEEE Std 80 | 2000 | Third major revision | | IEEE Std 80 | 2013 | Fourth major revision (current) | Under fault conditions, a large current injected into