Maximum substation fault level, maximum current grid-earth, soil resistivity testing, interpretation & modeling, clearance time, grounding grid, grounding grid resistance, GPR, Touch, Step & Transfer Voltage, Voltages Safety Limits, Surface Layer material, Bonding Arrangements.

References:

• AS 2067, Power Installations exceeding 1kV a.c.
• IEEE Std 80’Guide for Safety in AC Subst. Grounding’
• ENA EG1, Substation Earthing Guide
• ENA EG-0 Power System Earthing Guide, Draft -08/2009
• Practical Guide to Electrical Grounding
• SES – Safe Engineering Services & Technologies ltd.