Developing a method of measuring and assessing workers' exposure to transient electromagnetic fields of electric power supply systems

Following accepted assumptions, a model set of equipment was developed for measuring transient electromagnetic fields; it consists of isotropic measuring systems with frame sensors and an electronic module of a 4-channel signal recorder from a measuring system with a program for selecting the frequency of sampling the measuring signal, individually for each channel (1-1000 Hz). This makes it possible to optimally set the metrological parameters of the measuring set for measuring individual types of exposure. The equipment set comes with a developed method of measuring the transient magnetic field TF of electric power supply systems.The developed procedure and model set of equipment were used in field measurements of transient magnetic fields of electric power supply systems in power supply and engine systems of metro trains, trams, electric multiple unit trains and long-distance trains, lifts and power supply installations in electricity distribution boards, resistance welders and office equipment. The parameters of the measured magnetic field were identified with an oscilloscope before registration to select the operating parameters of the measuring system with an electronic data recorder and to fully reconstruct the image of variables and identify all TF events, their maximal values and dynamics of changes and duration.