ETS-Lindgren HI-3604 ELF Survey Meter - Manual (Page 29)

HI-3604 Manual Page -- 21
oriented directly beneath the conductors but at extended lateral
distances from the line, there can be some horizontal
component to the field. Thus, in measurements of electric fields
near power lines, it may be important to explore different
polarization components of the field to assess the resultant
electric fields at points above the earth.
Figure 4-2 indicates that the maximum electric field strength
beneath the 345 kV line is expected to be about 3.4 kV/m. The
maximum magnetic field strength will be dependent on the
magnitude of current flowing in the line; Figure 4-2 represents
the magnetic fields if the line was carrying a current of 1000 A
and indicates a maximum value of 175 mG (equivalent to 14
A/m).
Figure 4-2