Using an outdated PDF can lead to specifying arresters that do not meet current safety or performance requirements, potentially leading to equipment failure.
: This third edition heavily revised the older 2013 version. The primary technical update was to align the recommendations for selecting surge arresters with the modernized classification system introduced in the base product testing standard, IEC 60099-4:2014 Next Planned Update : As of right now, IEC 60099-5 Edition 4.0 iec 600995 pdf upd
Considerations for three-phase systems ( Using an outdated PDF can lead to specifying