Salah Belkhir, Moulai Hocine, Soukeur Fathallah, and Mohand Ouhrouche


Electric field, live working, overhead lines, minimum approach distanceselements of these lines and also the tools used in the execution of the LWT [5–10]. The understanding of the distribution of the electric field intensity around the edged parts is necessary for a good apprehension of the safety limits for the persons in charge of these works. The numerical methods enabled us, thanks to the development of the computer science, to solve, with a noteworthy accuracy, the problems of calculation


This paper presents a numerical survey on electric field distribution in electrode arrangements commonly met while executing a live working on overhead lines. This numerical investigation is achieved using a software package based on charge simulating method. Particularly, the influence of the curvature of the bodies under stress on the maximal value of the electric field and the predominance between the axial and the radial components of the electric field are shown. This knowledge is of a great importance for accurately dimensioning the safety minimum approach distances (MAD) for future works to be performed with nonnormalised tools. First, a rod–plane–wall configuration is addressed and satisfactory results are obtained. This allows bringing up into general use of charge simulating program (CSP) to determine the safe MAD for complex configurations. A method that consists in use of the numerical techniques to adapt the empirical methods for the evaluation of the MAD, when tools of nonconventional dimensions are used, is then developed.

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