Std 80 2013 _best_ — Ieee

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)

12.1 Small substation grid design 12.2 Large substation with multiple soil layers ieee std 80 2013

13.1 Acceptance tests 13.2 Periodic testing 13.3 Ground resistance measurement (fall-of-potential method) ground potential rise (GPR)

8.1 Allowable touch voltage 8.2 Allowable step voltage 8.3 Reduction factors (e.g., crushed rock surface layer) ieee std 80 2013

4.1 Objectives of grounding 4.2 Tolerable body current limits 4.3 Effect of frequency on body impedance 4.4 Criteria for tolerable touch and step voltages

3.1 Special terminology for this guide (e.g., ground potential rise (GPR), touch voltage, step voltage, mesh voltage, transferred voltage)

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)