Protocol for measurement of transmission and distribution line workplace magnetic fields by waveform capture

Magnetic field measurement protocols were developed to support an assessment of lineworker exposure to AC and DC magnetic field characteristics during the performance of transmission and distribution live-line maintenance tasks. Measurement parameters included field intensity, frequency content, polarization, orientation, temporal variability, and the vector relationships between the Earth´s static field and the AC power system field. Specifically for the lineworker monitoring study, the site measurement protocols were designed to answer the following questions: (1) What are the magnetic flux density characteristics that lineworkers are exposed to which are not captured by personal exposure (PE) measurements? (2) What are the magnetic flux density characteristics that must be incorporated into analytical exposure models? (3) How valid are conclusions about PE measurements when results are reported in terms of broadband values?