currents (15 100 Hz) persons Description zones:
. regards a.c.
Figure 4., the level danger
varies depending the frequency: low and high frequencies are less dangerous than the
technically applied frequencies and (see Figures 4.c.1.c.3 above Probability ventricular fibrillation above %
1) For duration current-flow below ms, the limit for the body current for line remains
constant value 200 mA.) and that with
alternating current (a.c.EFFECTS CURRENT PASSING THROUGH THE HUMAN BODY 21
4.
Zone
designation
Zone limits Physiological effects
AC 0,5 mA
a
Usually reaction
AC Usually harmful physiological effects
AC Usually organic damage expected
AC above Dangerous pathophysiological effects: cardiac arrest, breathing
arrest and severe burns
AC 4. Principles
There difference between the hazard associated with direct (d.4).1. more dangerous than d.): a.c. EFFECTS CURRENT PASSING THROUGH THE HUMAN BODY
4.1.c.1.1
Time/current zones effect a.1 Probability ventricular fibrillation about %
AC 4.2 Probability ventricular fibrillation about %
AC 4.1 4
