Introduction to Electrical Engineering

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

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c. EFFECTS CURRENT PASSING THROUGH THE HUMAN BODY 4.1. more dangerous than d.1 4.1.EFFECTS CURRENT PASSING THROUGH THE HUMAN BODY 21 4.2 Probability ventricular fibrillation about % AC 4.1 Probability ventricular fibrillation about % AC 4.c.1.): a.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., the level danger varies depending the frequency: low and high frequencies are less dangerous than the technically applied frequencies and (see Figures 4.4).c. Principles There difference between the hazard associated with direct (d.1.c. 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 4.1 Time/current zones effect a. currents (15 100 Hz) persons Description zones: .c. regards a. Figure 4.) and that with alternating current (a