GB/T 19443-2017 Insulators for overhead lines with a nominal voltage above 1500V—Ceramic or glass insulator units for d.c. systems—Definitions,test methods and acceptance criteria (English Version)
2017GB/T 19443-2017 Insulators for overhead lines with a nominal voltage above 1500V—Ceramic or glass insulator units for d.c. systems—Definitions,test methods and acceptance criteria
2004GB/T 19443-2004 Insulators for overhead lines with a nominal voltage above 1000V-Ceramic or glass insulator units for d.c. systems-Difinitions,test methods and acceptance criteria