Safe Earthing Systems - Part II: Earthing for Safety

Ensuring safety for both power authority personnel and the public in the event of an earthfault is one of the primary purposes of an earthing system. This paper addresses two questions pertinent to the goal of providing safe earthing systems: What are the causes and conditions of danger? What factors are involved in deriving realistic safety criteria, within the context of the Australian electrical power system? The integration of physiological data into the context of the electrical power system is required to enable design engineers to allocate limited resources in a manner consistent with realistic risk management philosophies.