The exposure risk of magnetic fields produced inside high
voltage substation is still challenge issue for both utility design
engineers and biomedical researchers as well. There are two
different types of exposure; the first type is the public which comes
from any temporary human presence nearby any electrical utility
installation while the second type is the residential which comes
from any type of resident or semi-permanent presence for more
about 8 hours (working shifts) nearby any electrical utility
installation. This classification is mainly dependent upon the levels
and durations of exposure. This paper presents the full simulation
for two typical high voltage substations of 500/220 kV and 220/66 kV
with different bus bar configurations for calculating the magnetic
field distributions. The effects of different bus bar configurations on
the magnetic field levels are presented. The simulated results are
compared with measured values to validate the accuracy of
simulation.