VDE-AR-N 4210-5 Anwendungsregel:2011-04

Depending on weather conditions, electrical circuits of overhead lines can carry an operating current diverging from the continuous current-carrying capacity given as an example in DIN EN 50182 without exceeding the maximum conductor temperature or undercutting the minimum distances between the conductor and ground or other objects. The continuous current-carrying capacity is determined under the ambient conditions of 35° C outside temperature, full global radiation and 0.6 m/s vertical wind flow in accordance with DIN EN 50341. If ambient conditions for an overhead line are forecast and recorded with adequate precision, safe network operation is possible making use of the current-carrying capacity of the electrical circuits of this overhead line resulting from such weather conditions.

This application guide shall be applied if, depending on weather conditions, electrical circuits with nominal voltages exceeding AC 45 kV are intended to be operated with an operating current higher than that given in DIN EN 50182.