The standard covers several types of modern overvoltage protection devices:
Using "Thermo Vision" to detect abnormal temperature rises on the housing. iec 600995 pdf
While common, the standard notes their limited use for true health diagnosis unless they are modern variants with current amplitude classification. 3. Informative Annexes The standard is rich with supplemental data, including: The standard covers several types of modern overvoltage
Specifically for overhead transmission and distribution lines. iec 600995 pdf
Guidance on selecting arresters with the appropriate protective level to safeguard insulation. 2. Diagnostic and Condition Monitoring