Substation lightning shield designing standards

There two main standards in practice for lighting shield designing. And each contains different calculation methods.

1. IEEE Guide for Direct Lightning Stroke Shielding of Substations (IEEE 998-2012).

2. Protection against lightning (IEC 62305-1,2,3,4).











One of the popular method included in IEEE 998 is the electrogeometric model (EGM) by rolling sphere method.