Extrapolation of measured values of power-frequency magnetic fields in the vicinity of power links

In the past two decades some national regulations have required measurements of power-frequency magnetic field, either to check compliance with a “measurable exposure limit” or to inform the public on their “real” or “expected maximum” magnetic field exposure. When there is a practical impossibility of making the measurements in the nationally established “reference loading condition”, engineers are confronted with the need to extrapolate the measured values, obtained in the measurement programme, to the ones that would be produced by the applicable reference limiting condition. This Technical Brochure gives an overview of the main characteristics of the magnetic field produced by power links and of the national regulations concerning both short-term and long-term exposure to magnetic…