Influence of Non-linear Loads on LV Cable Power Dissipation

Jul 04, 2025

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This study by J. Desmet and D. Putman analyzes how non-linear loads affect power dissipation in low-voltage cables, focusing on IT equipment currents. Theoretical considerations and temperature evaluations for both linear and non-linear loads are discussed. Findings indicate increased power losses with non-linear loads, potentially leading to cable overheating in high IT load environments.

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Influence of Non-linear Loads on LV Cable Power Dissipation

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Analysis of the influence of non linear loads on power dissipation of LV cables J. Desmet, D. Putman
Non linear BehaviorCase: Current taken by IT equipement
Non linear BehaviorTheoretical Considerations
Non linear BehaviorTheoretical Considerations
Cable Temperature:Evaluation Temperature for balanced symmetric linear and nonlinear load (XVB cable 4*2.5mm²)
Cable Temperature:Simulation Simulated temperature distribution for balanced symmetric linear and nonlinear load 20A/phase (XVB cable 4*2.5mm²)
Conclusions Few triple n harmonics in distribution, so no special measures However in building distribution with a high number of IT loads, excessive neutral conductor currents occur so cable overheating is possible. Extra power losses are found (increase up to the double of linear load)