Including those with series or parallel gaps rated up to 52 kV.
Annex J provides guidance for older silicon carbide (SiC) gapped arresters still in service. Key Technical Components
Guidance on selecting arresters with the appropriate protective level to safeguard insulation. 2. Diagnostic and Condition Monitoring iec 600995 pdf
Calculating the energy an arrester must absorb during switching surges or capacitor bank operations.
The IEC 60099-5:2018 edition introduced significant changes to align with the energy and charge classification system first set in IEC 60099-4:2014. The PDF outlines formulas and methods to determine: Including those with series or parallel gaps rated
Using "Thermo Vision" to detect abnormal temperature rises on the housing.
Estimating the lightning charge transfer requirements, crucial for lines below 245 kV where Station Light (SL) arresters are common. The PDF outlines formulas and methods to determine:
Engineers use this standard to establish maintenance protocols. It details several methods for monitoring arrester health in-service:
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:
Detailed comparisons between the old line discharge classes and the new charge-based classification, including simplified estimation methods for switching energies. Why Professionals Use the IEC 60099-5 PDF