# Quick Calculation of Magnetic Flux Density in Electrical Facilities
## 6 Conclusions  
Several epidemiological studies consistently warn of a risk with respect to certain diseases (such as childhood leukemia, with odds ratios close to 2) in people living close to high voltage lines, where MFDs greater than 0.4 \(\mu\)T are presented. This has led to the consideration of the magnetic field as potentially carcinogenic by international organizations such as the IARC. The European authorities warn of this risk and promote research in this area in order to improve their knowledge [10]. In Spain, as in other countries of the European Community, the study of the magnetic field produced by high voltage electrical facilities is mandatory, as stated in the High Voltage Electrical Installations Regulation [15]. This work describes a new software called CRMag(r). It is a simple but powerful tool for the calculation and three-dimensional representation of the magnetic field produced by the circulation of currents in electrical facilities. This software has been designed to facilitate the data entry for electrical installations using graphical user interfaces and simple forms. The calculation is carried out quickly and the results are always shown graphically and numerically. The results have been designed to be easy to understand and include in reports and studies. The software has been validated by numerous checks in real facilities and by laboratory tests. The main advantages of the use of such software are:  
* It requires less time than measuring. * It allows the user to simulate different alternative layouts of conductors easily. * It allows the user to simulate the facility with the desired conditions, regardless of the actual currents. * The simulation allows the user to represent the MFD on a wide area, meaning that it is very simple to study safety distances to the facility. * Occupational or general public overexposure in relation to regulated limits can be prevented. In the same way, precautionary levels related to childhood leukemia and other diseases can be checked. * CRMag@is an affordable tool specifically designed to calculate MFDs in electrical installation. It facilitates the definition of typical installations. The presented software allows the user to study the magnetic field of an existing installation or to anticipate its expected magnitude when a new installation is projected. In this way, it is easy to study alternatives to minimize the impact of the designed facility on neighboring premises or locations. Figure 15: MFD on the sidewalk at a height of 100 cm (z=1 m) at y=2.7m (**a**) and at y=2.8m (**b**) for the original situation (crosses) and for the proposed alternative (circles). In this work, a case study has been described to show the different results that the software produces and to study alternatives to reduce the impression of an installation on the neighboring areas. Thanks to a study that was carried out, an alternative design has been found that reduces the maximum MFDs in certain areas to values more than 80% lower than the MFDs produced by the initial design. This case study has been selected to prove the great influence of the arrangement of the conductors of different phases when the lines are installed. In the presented case study, the optimal sequence of phases to lay conductors in the tray and on the wall (by triplets) is shown. The data provided in the case study are of great interest to engineers related to the project of constructing this type of facility. Additionally, the improvements shown in this case are obtained with simple simulations and can be easily implemented. The knowledge of the MFD produced by facilities can be of great help in future research about the real influence that this type of pollution has on the development of certain diseases. Therefore, we cannot dismiss the notion that future regulations stating lower limits regarding the exposure of people to this type of influence will be an eventual result of new research.