This standard specifies the model and structural dimensions, technical requirements, inspection rules, test methods, acceptance, packaging, transportation and storage of disc-shaped suspended composite porcelain or glass insulator string components for high-voltage DC lines. This standard applies to disc-shaped suspended composite porcelain or glass insulators (hereinafter referred to as insulators) for DC overhead power lines with a nominal voltage higher than 1500V.
DL/T 1471-2015 Referenced Document
DL/T 1000.2 Application guide of insulators for overhand lines with a nominal voltage over 1000V.Part 2:Ceramic or glass insulator for d.c. system
DL/T 376 General specifications for insulating materials for sheds and sheaths of polymer insulators
DL/T 627 Room temperature vulcanized silicon rubber anti-pollution coating for insulators*， 2019-05-01 Update
DL/T 810 Technical specification for ± 500 kV or above D.C. long rod composite insulators
GB/T 1001.1 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*， 2021-12-31 Update
GB/T 16927.1 High-voltage test techniques.Part 1:General definitions and test requirements
GB/T 19443 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*， 2017-11-01 Update
GB/T 20642 Impulse puncture tests in air on insulators for overhead lines
GB/T 22707 Artificial pollution tests on high-voltage insulators to be used on d.c.systems
GB/T 22708 Thermal-mechnical performance test and mechanical performance test on string insulator units
GB/T 22709 Residual strength of string insulator units of glass or ceramic material for overhead lines after mechanical damage of the dielectric
GB/T 24623 Radio interference test on high-voltage insulators
GB/T 25318 Locking devices for ball and socket couplings of string insulator units—Dimensions and tests*， 2019-12-10 Update