IEC_60479-2.pdf

64/1507/CDCOMMITTEE DRAFT(CD)IEC/TC or SC:TC 64 Project number IEC 60479-2,TS,Ed.3 Title of TC/SC:Electrical installations and protection against electrical shock Date of circulation 2005-12-09 Closing date for comments 2006-03-10 Also of interest to the following committees see below*)Supersedes document 64/1258/MCR Functions concerned:Safety EMC Environment Quality assurance Secretary:Mr.Reinhard Pelta(Germany)E-mail: THIS DOCUMENT IS STILL UNDER STUDY AND SUBJECT TO CHANGE.IT SHOULD NOT BE USED FOR REFERENCE PURPOSES.RECIPIENTS OF THIS DOCUMENT ARE INVITED TO SUBMIT,WITH THEIR COMMENTS,NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION.Title:IEC 60479-2,TS,Ed.3:Effects of current passing through the human body-Part 2:Special aspects(Titre):Introductory note IEC 60479-2 has the status of a Basic Safety Publication according to Guide 104.The document will be issued as a TS.*)This document may be of interest of the following Technical Committees:TC2-TC7-TC8-TC9-TC11-TC13-TC14-TC17-TC18-TC20-TC21-TC22-TC23-TC26-TC27-TC28-TC29-TC31-TC32-TC33-TC34-TC35-TC36-TC37-TC38-TC39-TC40-TC42-TC44-TC45-TC46-TC47-TC48-TC49-TC55-TC57-TC59-TC61-TC62-TC65-TC66-TC69-TC72-TC76-TC78-TC79-TC80-TC81-TC82-TC85-TC87-TC88-TC90-TC91-TC93-TC94-TC95-TC96-TC97-TC99-TC100-TC103-TC104-TC106-TC107-TC108-TC109-TC110-TC112 and their respective sub-committees Copyright 2005 International Electrotechnical Commission,IEC.All rights reserved.It is permitted to download this electronic file,to make a copy and to print out the content for the sole purpose of preparing National Committee positions.You may not copy or mirror the file or printed version of the document,or any part of it,for any other purpose without permission in writing from IEC.PRIVATE CIRCULATION IEC 60479-2 IEC:2005 2 64/1507/CD 1 Scope.4 2 Normative references.4 3 Definitions.5 4.Effects of alternating currents with frequencies above 100 HZ.6 4.1 General.6 4.2 Effects of alternating current in the frequency range above 100 Hz up to and including 1 000 Hz.7 4.2.1 Threshold of perception.7 4.2.2 Threshold of let-go.7 4.2.3 Threshold of ventricular fibrillation.7 4.3 Effects of alternating current in the frequency range above 1 000 Hz up to and including 10 000 Hz.7 4.3.1 Threshold of perception.7 4.3.2 Threshold of let-go.7 4.3.3 Threshold of ventricular fibrillation.7 4.4 Effects of alternating current in the frequency range above 10 000 Hz.7 4.4.1 Threshold of perception.7 4.4.2 Threshold of let-go.7 4.4.3 Threshold of ventricular fibrillation.8 4.4.4 Other effects.8 5 Effects of special waveforms of current.10 5.1 General.10 5.2 Equivalent magnitude,frequency and threshold.10 5.3 Effects of alternating current with ponents.11 5.3.1 Waveforms and frequencies and current thresholds.11 5.3.2 Threshold of startle reaction.11 5.3.3 Threshold of let-go.11 5.3.4 Threshold of ventricular fibrillation.13 5.3.4.1 Waveforms consisting of specific ratios of alternating to direct current.13 5.3.4.2 Examples of rectified alternating current.14 6 Effects of alternating current with phase control.15 6.1 Waveforms and frequencies and current thresholds.15 6.2 Threshold of startle reaction and threshold of let-go.15 6.3 Threshold of ventricular fibrillation.16 6.3.1 Symmetrical control.16 6.3.2 Asymmetrical control.16 7 Effects of alternating current with multicyle control.16 7.1 Waveforms and frequencies.16 7.2 Threshold of startle reaction and threshold of let-go.16 7.3 Threshold of ventricular fibrillation.16 IEC 60479-2 IEC:2005 3 64/1507/CD 7.3.1 For shock durations longer than approximately 1,5 times the period of the cardiac cycle,the threshold depends on the degree of power control p.For p near the unity it has the same r.m.s.value as the sinusoidal alternating current of the same duration.For p near 0,1 the r.m.s.value of the current during current conduction I1rms is the same as the threshold for alternating current of a duration below 0,75 times the period of the cardiac cycle.17 7.3.2 For shock durations shorter than approximately 0,75 times the period of the cardiac cycle the r.m.s.value of the current during the current conduction I1rms is the same as that for a sinusoidal alternating current of the same duration.17 8 Estimation of the equivalent current threshold for mixed frequencies.17 8.1 Threshold of perception and let-go.17 8.2 Threshold of ventricular fibrillation.17 9 The effect of repeated pulses(bursts)of current on the threshold of ventricular fibrillation.18 9.1 Ventricular fibrillation threshold of multiple bursts of current separated by 1 second or more.18 9.2 Ventricular fibrillation threshold of multiple bursts of current separated by less than 1 second.18 9.2.1 Example 1.19 9.2.2 Example 2.20 10 Effects of Electric Current through the Immersed Human Body.20 10.1 Resistivity of Water Solutions and of the Human Body.20 10.2 Impedance Characteristics of the of Electrical Source in the Water.21 10.3 Physiological