Extremely low frequency magnetic field survey in indoor distribution substation in Egypt

The use of electricity become an integral part of everyday life. Besides that, exposure to extremely low frequency (ELF) magnetic fields from electric power transmission and distribution has been an emerging occupational and public concern due to their potential health effects. Utilities concern over the possible health effects from electromagnetic fields (EMF) has led to the preparation of this research. The research aims to compare between the measured magnetic field values and the simulated models for the indoor medium to low voltage (MV/LV) distribution substations. To calculate the magnetic flux density in the substations, interactive software SUBCALC is used which is based on closed form solution of the Biot-Savart law with 3D conductor model. The comparison between the measured values and the simulated models was acceptable. However there were some discrepancies, as expected, due to the current variation during measurements.