lled, a total of 48. РOne 110 kV line length of four sand 12.13 km, the terrain line through most of the ground, including a cross rivers. Insulator for the XP-7 type, put into operation in 1992. The lines 26, 29, respectively, in 1998 the tower, being struck by lightning in 1999, 26, L2 and L3 phase insulator tower crushed L1 phase insulator 29, smashed the tower. In this regard, we analyze the line data, statistics, carried out by the lightning tower site inspection, and measurement of the tower grounding resistance. In the site survey, we found 26, 29, tower grounding resistance of 13 Ω or more in the vicinity of 27, 28, Tower is located in rivers, the nominal height of more than 26, 29, tower. After analysis, we believe that 26, 29, is due to the tower part of being struck by lightning
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