To combat this, the International Electrotechnical Commission (IEC) developed the . Within this framework, IEC 60815-2 stands as the essential standard for systems operating at AC voltages between 1000 V and 300 kV (and applicable up to 765 kV). This article provides an exhaustive exploration of the IEC 60815-2 PDF , its contents, how to apply it, and where its value lies for engineers, utilities, and manufacturers.
From Table 2 (Level d → 31–43 mm/kV). Choose 38 mm/kV as a conservative interim value. iec 60815-2 pdf
System voltage (Um) = 145 kV (max operating voltage for a 132 kV system). Required creepage = 38 mm/kV × 145 kV = 5,510 mm . From Table 2 (Level d → 31–43 mm/kV)
The combination of cement dust (conductive when wet – high NSDD) and salt spray (high ESDD) pushes the site into Level d – Very Heavy . Required creepage = 38 mm/kV × 145 kV = 5,510 mm