Ieee Std 80 2013 Better -

6.1 Division of fault current between grid and neutral 6.2 Asymmetrical current factor (decrement factor) 6.3 Current split factor (grid current vs. remote earth)

9.1 Preliminary grid design 9.2 Resistance of grounding grid 9.3 Maximum grid current (I G ) 9.4 Mesh voltage (E m ) calculation (Sverak's method) 9.5 Step voltage (E s ) calculation 9.6 Voltage gradient distribution 9.7 Refinement of grid design (iterative process)

10.1 Grounding of substation fence 10.2 Transfer potentials (conductors leaving substation) 10.3 Grounding of metallic structures 10.4 Seasonal variation of soil resistivity 10.5 Galvanic corrosion ieee std 80 2013

This standard is the definitive guide for designing substation grounding systems to protect personnel from electric shock hazards. 1. Overview 1.1 Scope 1.2 Purpose 1.3 Application

11.1 Alternative methods (deep-driven rods, counterpoise, chemical rods) 11.2 Surface layer improvements Overview 1

8.1 Allowable touch voltage 8.2 Allowable step voltage 8.3 Reduction factors (e.g., crushed rock surface layer)

13.1 Acceptance tests 13.2 Periodic testing 13.3 Ground resistance measurement (fall-of-potential method) ieee std 80 2013

12.1 Small substation grid design 12.2 Large substation with multiple soil layers