Environmental magnetic field assessment. A case study

This paper describes the magnetic field measurements performed in a public access area - a market place, situated in the close vicinity of a transformer substation part of the Romanian national power grid. The measurement results were compared to the limits, regarding the human exposure to electromagnetic fields, imposed by normative documents. An analytical simplified estimation was performed too. It was found that in some areas of the market place the magnetic field exceeds the levels imposed by current limiting exposure normative and guidelines. In the same areas, persons working in the market place reported frequent electrostatic discharges.