High Voltage Air Switches are intended to operate under usual operating conditions unless otherwise specified. This includes winds up to 37 m/s (133.2 km/h). It is not uncommon for these switches to be exposed to winds that exceed this speed. Worker safety and electric system reliability are often reliant upon the position of a switch regardless of wind and weather conditions. This guide can be used to assist with specifying switches that are expected to operate in areas where wind speeds will exceed the usual operating conditions. This guide will provide users and manufacturers with a common means of testing and specifying wind loads on high voltage switches. This guide does not apply to indoor or enclosed switches. Wind tunnel testing is beyond the intent of this document.
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