GB/T 26218.4-2019
ActiveSelection and dimensioning of high-voltage insulators intended for use in polluted conditions—Part 4: Insulators for d.c. systems
污秽条件下使用的高压绝缘子的选择和尺寸确定 第4部分：直流系统用绝缘子
Application Summary AI generated
This standard specifies methods for selecting and dimensioning high-voltage insulators for direct current (DC) systems operating in polluted environments. It is applied by electrical engineers and utilities to ensure reliable performance of DC transmission lines and substations, particularly in areas with industrial, coastal, or desert contamination. The standard provides specific pollution severity classifications and creepage distance requirements tailored to the unique electrostatic behavior of DC systems.
Related Standards
GB/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
GB/T 4585-2004
Artificial pollution tests on high-voltage insulators to be used on a.c. systems
GB/Z 23756.1-2009
Evaluation of electrical endurance of electrical insulation systems - Part 1: General considerations and evaluation procedures based on normal distributions
GB/Z 16935.2-2013
Insulation coordination for equipment within low-voltage systems―Part 2-1: Application guide-Explanation of the application of the IEC 60664 series, dimensioning example and dielectric testing
GB/Z 16935.6-2016
Insulation coordination for equipment within low-voltage systems—Part 2-2: Interface considerations—Application guide
GB/Z 37754-2019
Guidance on clearances and creepage distances in particular for distances equal to or less than 2mm—Test results of research on influencing parameters
GB/Z 43963-2024
Guidance for determination of clearances, creepage distances and requirements for solid insulation for equipment with a rated voltage above 1 000 V AC and 1 500 V DC, and up to 2 000 V AC and 3 000 V DC
GB/T 775.2-2003
Test method for insulators--Part2: Electrical test methods
Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.