IEC 60364-4-443:1995+AMD1:1998 CSV

Foreword
Introduction
1 General
  1.1 Scope and object
  1.2 Normative references
2 Classification of impulse withstand categories
   (overvoltage categories)
  2.1 Purpose of classification of impulse withstand
  categories (overvoltage categories)
3 Arrangements for overvoltage control
  3.1 Inherent control
  3.2 Protective control
4 Selection of equipment in the installation
Annex A(informative) - Guidance for protective control
       applied in the overhead lines according to note 1

Identifies and describes the locations in electrical installations where transient overvoltages may appear; describes the means by which such overvoltages may be limited to values not exceeding the withstand impulse voltages of the equipment supplied.