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This paper report on an theoretical investigation using FEA simulations on the stress distribution in medium voltage cable joints. Three different supplies namely 50 Hz sinusoidal, VLF 0.1 Hz sinusoidal and VLF 0.1 Hz cosine square were evaluated. The simulation results show that phase shifts occur in the stresses under 0.1 Hz sinusoidal voltages and that only above 10 Hz sinusoidal no phase shifts...