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| Keywords: SectionInsulator.png en wikipedia 2011 December 18 An insulator at a section break on 12 kV 25 Hz catenary The white parallel rods are fiberglass insulators A passing pantograph will bridge the metal runners shorting the two sections of catenary together Note that the arcing horns diverge as they rise above the runners this helps to extinguish the arc which is formed whenever a pantograph travels under the runners Mcg410 talk 03 29 27 December 2010 UTC en wikipedia Jay8g CommonsHelper 2010-12-27 Mcg410 wikipedia en Mcg410 wikipedia en Cc-zero Original upload log page en wikipedia SectionInsulator png 2010-12-27 03 29 Mcg410 3072×2304× 10001216 bytes <nowiki>An insulator at a section break on 12 kV 25 Hz catenary ~~~~</nowiki> Overhead line section insulators | ||||
