The IEEE Standard 80-2013 PDF, titled "IEEE Guide for Safety in AC Substation Grounding," provides a comprehensive framework for designing and implementing safe and efficient grounding systems in AC substations. The standard covers various aspects of grounding, including the design of grounding systems, soil resistivity measurements, and the selection of grounding electrodes.
The heart of the IEEE Std 80-2013 lies in its safety criteria formulas. It identifies two main electrical hazards that occur when large fault currents dissipate into the earth: and Step Voltage . Key Hazard Definitions IEEE guide for safety in AC substation grounding
Designing a compliant grounding grid is an iterative process. The PDF manual outlines a structured flowchart that engineers must follow:
A: The 2013 edition includes more detailed information on current determination methods, new equations for bi-metallic conductors, a benchmark annex for software validation, and corrections integrated from Corrigendum 1.
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), the design is immediately deemed safe, and no further geometric evaluation is required. If it exceeds Etouchcap E sub touch end-sub
Perhaps one of the most practical enhancements introduced in IEEE Std 80-2013 is a that presents benchmarks comparing the IEEE equations with results from commercially available software. This addition allows engineers to verify the accuracy of their ground-grid design software and ensures consistency between different computational tools. As the IEEE 80 Grounding Working Group Chair noted, these benchmarks help engineers “verify their understanding of ground-grid design software.”
IEEE Standard for Safety in Electric and Gas Utilities Substations
: The potential difference between a person's feet (assumed 1-meter apart). Touch Voltage