Abstract: Purpose – This paper aims to present a software application, called EasyMAG, for simulating and calculating the magnetic field during the design of domestic/industrial electrical installations. Design/methodology/approach – From a CAD software 3D representation of the model, including the electric wiring and considering the current in the electrical circuits, the software evaluates the magnetic field intensity for power-line frequencies at different heights. Findings – Two application examples are presented consisting of a cabling layout in a lab room with three phase illumination and power socket circuits and a computer room above a power transformer room. The results were compared with measured values showing a good agreement between them. Originality/value – Shows that with this software it is possible to anticipate areas where magnetic field values might reach abnormally high values and to analyze alternative wiring layouts in order to keep the magnetic field values as low as possible.

Abstract: An overhead power line is described as a catenary, and for numerical modeling using linear approximation, this curve must be represented as a set of linear segments which provides a piecewise linear approximation. The objective of this work is to perform a sensitive analysis of the error obtained in the calculation of the magnetic field due to the power line considering this piecewise linear approximation, varying the number of linear segments used and comparing the results. There were considered several types of overhead power line circuits, taking into account parameters as the span and the sag. It possible to observe that the values of the magnetic field quickly converge as the number of linear segments to represent the catenary increases and, for a fast and significantly accurate result only a small number of linear segment will be adequate