Insulators for overhead lines―Composite suspension and tension insulators for a.c. systems with a nominal voltage greater than 1 000V―Definitions, test methods and acceptance criteria
Insulators for overhead lines—Composite suspension and tension insulators for d.c.systems with a nominal voltage greater than 1500 V—Definitions, test methods and acceptance criteria
Insulators for overhead lines with a nominal voltage above 1 000V—Part 1:Ceramic or glass insulator units for a.c.systems—Definitions,test methods and acceptance criteria