Autors: Nikolov, N. N., Atanasov, V. C., Stoilov, D. G.
Title: Impact of the number of earth continuity conductors and their positioning on induced voltage in cable screens
Keywords: cable screen voltage, earth continuity conductor, induced voltage, sheath bonding, sheath losses

Abstract: – The induced voltage in the metal screens of high-voltage cables is one of their key characteristics. It directly affects both the operational parameters and personnel safety. When using different bonding schemes such as single-point or cross-bonding, the induced voltage depends not only on the magnitude of the load current and the cable configuration but also on the presence and design characteristics of additional elements, such as earth continuity conductors (ECC). Uncertainty in the levels of induced voltages in cable screens can result in hazardous touch and step potentials, accelerated insulation aging or breakdown, and increased power losses. This article investigates the dependence of the induced voltages in cable screens on key design factors, with particular emphasis on the role of earth continuity conductors. The analyzed configurations include the use of a single ECC, dual ECCs, two different cross-sections and alternative positioning around the power cables. The effects of ECC cross-section, geometry, and placement relative to the cable configuration are quantified using theoretical models.

References

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Issue

2025 17th Electrical Engineering Faculty Conference - Energetics and Efficiency, BulEF 2025, 2026, Bulgaria, https://doi.org/10.1109/BulEF66320.2025.11298933

Вид: публикация в международен форум, публикация в реферирано издание, индексирана в Scopus