A safe grounding system relies on keeping actual voltages below the "tolerable" limits calculated by the standard. IEEEhttps://ieeexplore.ieee.org 80-2013 - IEEE Guide for Safety in AC Substation Grounding
Imagine you are designing a 138kV substation with a 20kA symmetrical fault current for 0.5 seconds. Using : ieee standard 80-2013 pdf
The standard provides a structured approach to ensuring that anyone working within or near a substation is safe from the dangerous potential differences that occur during a ground fault. Its main goals include: A safe grounding system relies on keeping actual
) and compare them against the tolerable limits. If the actual voltages exceed the limits, the design must be refined (e.g., by adding more conductors or ground rods). Academia.edu Key Technical Parameters Description Typical Target Value cap R sub g Ground Resistance (large substations); (distribution) Step Voltage Voltage between feet 1m apart Must be less than tolerable cap E sub s t e p end-sub Touch Voltage Voltage between hand and feet Must be less than tolerable cap E sub t o u c h end-sub Grid Depth Burial depth of the mat Common range: 0.5m to 1.5m Official Access & Resources Official Document : You can purchase or access the full text through the IEEE Xplore Digital Library Sample Calculations : For a detailed walkthrough of the math, review Annex B of the standard , which provides complex design examples. IEEE Guide for Safety in AC Substation - Grounding Its main goals include: ) and compare them
Understanding IEEE Std 80-2013: A Guide to AC Substation Grounding Safety