Abstract

The paper describes the mechanical failures due to ice and wind, which caused the collapse of 114 towers of the 420 kV Turkish lines in 14 separate incidents, during the first 5 years of operation. It also discusses the temporary electrical faults caused by ice and wind. Referring to a previous report 1 , the paper gives further information on the severe problems resulting from the droppings of the Egyptian vultures, which caused several hundred temporary faults. A statistical record of all the faults is presented. The tower failures and faults experienced are evaluated in relation to the mechanical loading assumptions and design criteria. A brief summary is given of the countermeasures being adopted.

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