ALLTEC Protection Pyramid Surveys — A Three Part Series
If you missed Part I, you can read it here: Part I — Grounding/Earthing, & Bonding.
Grounding/Earthing and Bonding alone are not sufficient to adequately protect a facility. The second tier of the Protection Pyramid diminishes the significance of random high-energy, short-duration electrical power transients through properly installed surge protective devices.
These occurrences are typically caused by atmospheric phenomena (such as lightning strikes), utility switching, inductive loads, and internally generated overvoltages. Transient voltage surge suppression (TVSS) or surge protection devices (SPD) should be incorporated and fully integrated into the facility’s inspection and maintenance program.