Introduction to Electrical Engineering

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Pro: ČEKO IMPORT a.s.
Vydal: České vysoké učení technické Praha Autor: Vladimír Kůla, Michal Kříž

Strana 22 z 112

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