
The EMC national standards that power line carrier PLCs must comply with mainly include the GB/T 17626 series and GB 9254. GB/T 17626 corresponds to the IEC 61000-4 series, including tests for electrostatic discharge (GB/T 17626.2), radiated immunity (GB/T 17626.3), and surge (GB/T 17626.5). GB 9254 corresponds to CISPR 32, specifying the limits for radiated and conducted emissions from information technology equipment. In addition, the power industry standard DL/T 698 covers EMC requirements for power line carrier communication. Compliance with national standards requires incorporating EMC design during the product design phase and obtaining certification from a third-party testing organization. Meeting national standards is a necessary condition for product market launch and enhances market competitiveness.