IEC 61643-12 Ed. 1.0 b:2002, Low-voltage surge protective devices - Part 12: Surge protective devices connected to low-voltage power distribution systems - Selection and application principles

Applies to surge protective devices (SPD's) used to protect, under specific conditions, electrical systems and equipment against various overvoltage and impulse curents (e.g. lightning, switching surges).Information is provided on equipment to be protected, system characteristics, insulation levels, overvoltages, methods of installation,location,co-ordination and failure modes of SPD's, as well as equipment failure consequences.