IEC 61325 Ed. 1.0 b:1995, Insulators for overhead lines with a nominal voltage above 1000 V - Ceramic or glass insulator units for d.c. systems - Definitions, test methods and acceptance criteria

Is applicable to string insulator units of ceramic material or glass for use on d.c. overhead power lines with a nominal voltage greater than 1 000 V. This standard specifies: -the characteristics of insulators; -the conditions under which the specified values of these characteristics shall be verified; -acceptance criteria