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Would anyone have any comments on the
following,
Statutory authorities often legislate for
maximum of ELF magnetic fields at either 50 or 60 hz. Some frequencies of
interest are bracketed in the 0 -300 hz range.This range does not cover the
ripple frequency of high power full wave rectified 10 kAmp electrolysis systems
used for commercial production of chlorine or the production/purification
of metals. The ripple frequency of a 50 hz three phase full wave rectified
phase shifted 12 pulse system is 600 hz. The ripple field would be a
small fraction of the static field. I would like to know the
following. What magnetic field strength limit should be applied
when
1 A person task is such that he/she
will remain stationary in one position and only be effected by
currents induced by the ripple frequency?
2 The task is such that the person is walking
through the intense static field at 1 metre per
second.
What level of static field strength becomes
biologically significant when a person is required to continually walk
through the field.
Yours Faithfully,
Mike Malaxos For Radiation Safety Services Mike@radiationsafety.com.au P 61 8 475 0099 P. 61 8 2551214 a/h Licence No LS 198 89 5866 |