Determining currents of cable sheaths by means of current load factor and current reduction factor

Abstract

A new method for determining sheath currents as the consequence of electromagnetic coupling during line-to-ground short circuit is described it this article. This method is based on using both the current load factor and the current reduction factor. The model cables are selected to present major constructions encountered in practice. The cable line consists of three single-core cables laid in trefoil formation and touching each other. Cable sheaths are grounded at both ends. Current load factor and current reduction factor are characteristic data of the analyzed cable line. The method presented in this paper is easy to use.

Ranko Goić

Full Professor | Department of Power Grids and Substations

Full professor at the Faculty of Electrical Engineering, Mechanical Engineering, and Naval Architecture in Split exeperienced in transmission and distribution networks, renewable energy sources (RES), power system planing and economics