GB/Z 28820.3-2012 "Polymer long-term radiation aging - Part 3: Procedures for in-service monitoring of low-voltage cable materials" summarizes the main technical means for in-service monitoring of low-voltage cable materials, focusing on monitoring methods for cable degradation. The standard introduces the advantages and disadvantages of each monitoring method and its application status, providing guidance for the long-term safe operation of low-voltage cables. The standard is applicable to the aging monitoring of low-voltage cable materials under actual operating conditions, and is an important reference for ensuring the Reliability of power systems.