Directives Concerning the Protection of Telecommunication Lines Against Harmful Effects from Electric Power and Electrified Railway Lines. Volume V, 1999 Edition
Inducing Currents and Voltages in Power Transmission and Distribution Systems
The Directives provide a comprehensive description of electromagnetic effects due to the close proximity of telecommunication lines to power and electrified railway systems. Such effects may result in danger to personnel, damage to telecommunication equipment, deterioration of telecommunication transmission quality or to disturbance of signaling. Volume V - Inducing currents and voltages in power transmission and distribution systems - describes unbalanced and balanced power systems in normal operation and under fault conditions.
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Currents in normal operation
Load currents may vary over a wide range even in lines with the same nominal voltage. In the case of short lines, the upper limit of current is determined by economic considerations e.g. by losses, or by the temperature rise of conductors. Consequently, the maximum current depends on conductor cross-section and on the cost of power losses.
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