*Wind load is not taken into account in High Voltage Electricity Distribution Overhead Line calculations when the conductor wire is icy. It is obvious that wind will blow even in icy conditions. Here, with Pbw, 100% wind is applied to the conductor.
The force was calculated assuming a load. The total load on the conductor was calculated using Pnw. Especially in places where winter conditions are harsh, pole collapses are
This force must be taken into account in order to prevent it.
**Critical Temparature t_kr (⁰C) :Since the distribution of poles on the land should be made according to the situation where the maximum sag will occur, the maximum sag is; It is necessary to calculate whether it will occur at maximum temperature or under additional load.There is a temperature that gives a sag equal to the sag in the icy state, and this temperature is called the critical temperature.

***Critical Span Length a_kr (m):In power distribution lines, maximum tension occurs either under additional load or at minimum ambient temperature. There is a span that separates these two situations where maximum tension occurs, and this span is called the critical span.