Sheath Voltage and Sheath Current Phenomenon for Different Types of Bonding for HV Power Cable Under Steady State

Sheath being an eternal part of a cable, protects the insulation from moisture ingression, acts as an electrical shielding, and also a return path for load and fault current. Being grounded to at least any single point the cable sheath will always have either one of them or both types of phenomenon, the sheath voltage, and sheath current. The induced voltage in the sheath causes the flow of circulating current and this undesirable current causes sheath loss which affects the life expectancy of the cable. To reduce the sheath phenomenon different bonding system was introduced for the HVAC cable according to IEEE standard 575, but a single point, two points, and cross bonding cable are the most common phenomenon. In this paper, a comparative study of sheath voltage and sheath current for the different bonded systems is investigated, and a ladder network of the cable at a steady state was also mentioned. The simulation study was carried out with circuit-simulating software.