3
Influence frequencies [according IEC 479 (1974), First edition].e.
Curve Threshold perception for 99,5% persons tested, i. Important parameters regarding the risk electric shock,
besides the current and time aspects, are:
- frequency the current,
- resistance the human body (depending the frequency). Based
on publication the Association for the Advancement Medical Instrumentation
(AAMI) July 1971.
Curve Let-go-current for 99,5% the persons tested, i.1. remainder felt nothing.EFFECTS CURRENT PASSING THROUGH THE HUMAN BODY 23
The hazard electric current primarily depends the value the current passing through
the human body and its duration. The diagram may help in
the evaluation risks for different frequencies. 50% could not let go. 0,5% could not let go.
Figure 4.e.
.e.
Description curves:
Curve Conventional limits for current values normally not giving rise any reaction.e. 99,5% could not let go. remainder felt nothing.e.
Curve Let-go-current for 50% the persons tested, i.
Curve Let-go-current for 0,5% the persons tested, i.
Curve Threshold perception for 50% persons tested, i
