IEC TS 61201-2007 Use of conventional touch voltage limits - Application guide《常规接触电压限制的使用.应用指南》.pdf

1、 IEC/TS 61201 Edition 2.0 2007-08 TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE Use of conventional touch voltage limits Application guide Utilisation des tensions limites conventionnelles de contact Guide dapplication IEC/TS 61201:2007 BASIC SAFETY PUBLICATION PUBLICATION FONDAMENTALE DE SCURIT TH

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16、s ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC/TS 61201 Edition 2.0 2007-08 TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE Use of conventional touch voltage limits Application guide Utilisation des tensions limites conventionnelles de contact Guide dapplication

17、 INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE Q ICS 13.260; 29.020; 91.140.50 PRICE CODE CODE PRIX ISBN 2-8318-9291-0 BASIC SAFETY PUBLICATION PUBLICATION FONDAMENTALE DE SCURIT 2 TS 61201 IEC:2007 CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Normative refer

18、ences .6 3 Use of this technical specification.7 4 Conditions and values of thresholds .7 4.1 Physiological effects of body current .7 4.2 Body impedance7 5 Voltage thresholds and limits8 5.1 Voltage threshold as a function of contact area .8 5.2 Conventional voltage limits11 6 Limits of applicabili

19、ty 14 6.1 Higher frequency alternating voltages and currents .14 6.2 Immersion .14 6.3 Medical applications14 Annex A (informative) Voltage thresholds - charged capacitors15 Bibliography17 Figure 1 Minimum touch voltage threshold corresponding to a.c. and dry conditions for current startle reaction

20、a), muscular reaction (b) and ventricular fibrillation (c 1 )8 Figure 2 Minimum touch voltage threshold corresponding to a.c. and water-wet conditions for current startle reaction (a), muscular reaction (b) and ventricular fibrillation (c 1 ) .9 Figure 3 Minimum touch voltage threshold correspondin

21、g to a.c. and saltwater-wet conditions for current startle reaction (a), muscular reaction (b) and ventricular fibrillation (c 1 ) .9 Figure 4 Minimum touch voltage threshold corresponding to d.c. and dry conditions for current startle reaction (a), muscular reaction (b) and ventricular fibrillation

22、 (c 1 )10 Figure 5 Minimum touch voltage threshold corresponding to d.c. and water-wet conditions for current startle reaction (a), muscular reaction (b) and ventricular fibrillation (c 1 ) .10 Figure 6 Minimum touch voltage threshold corresponding to d.c. and saltwater-wet condition for current sta

23、rtle reaction (a), muscular reaction (b) and ventricular fibrillation (c 1 ) .11 Figure A.1 Values of charged capacitances .16 Table 1 Examples of maximum contact areas corresponding to given a.c. touch voltages .12 Table 2 Examples of maximum contact areas corresponding to given d.c. touch voltages

24、13 Table A.1 Limits for steady state voltage15 Table A.2 Limit values of accessible capacitances (threshold of pain)16 TS 61201 IEC:2007 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ USE OF CONVENTIONAL TOUCH VOLTAGE LIMITS APPLICATION GUIDE FOREWORD 1) The International Electrotechnical Commission

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37、can be transformed into International Standards. IEC/TS 61201, which is a technical specification, has been prepared by IEC technical committee 64: Electrical installations and protection against electrical shock. This second edition cancels and replaces the first edition which was issued as a techn

38、ical report in 1992. It constitutes a technical revision and now has the status of a technical specification. 4 TS 61201 IEC:2007 The main changes with respect to the previous edition are listed below: proposal of maximum contact areas for various conventional touch voltage limit; introduction of di

39、fferent current pathways through the human body for the selection of conventional touch voltage limit; introduction of conventional touch voltage limit corresponding to the startle reaction current threshold, the inability of let-go current threshold and the ventricular fibrillation current threshol

40、d; possibility of interpolation on contact area for other conventional touch voltage limits. It has the status of a basic safety publication in accordance with IEC Guide 104 and ISO/IEC Guide 51. The text of this technical specification is based on the following documents: Enquiry draft Report on vo

41、ting 64/1584/DTS 64/1605/RVC Full information on the voting for the approval of this technical specification can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the cont

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43、aced by a revised edition, or amended. TS 61201 IEC:2007 5 INTRODUCTION This technical specification replaces the first edition of IEC/TR 61201 and provides voltage limits which are intended to be used by IEC technical committees as conventional touch voltage limits with regard to protection against

44、 electric shock. Its purpose is to facilitate harmonization and consistency among different IEC publications. The values proposed in this specification are derived from IEC/TS 60479-5. IEC 60479-5 gives the methodology used for the determination of touch voltage from the application of the Ohms law

45、between different current thresholds corresponding to different physiological effects and body impedances corresponding to various current paths through the human body, contact areas, skin moisture at this contact area and on the type of current. Current thresholds and body impedances are provided b

46、y IEC/TS 60479-1. This specification discusses 50/60 Hz sinusoidal alternating voltage and pure direct voltage having no significant alternating component. Higher frequency alternating voltage is not included in this type of analysis as this would require a more complex body impedance model and woul

47、d require the use of frequency factors for the current thresholds for the unwanted physiological effects. As this technical specification does not cover frequencies higher than 50/60 Hz, technical committees are requested to inform IEC/TC 64 about experience gained on this subject. Suggestions for m

48、odifications and additions to the technical specification should be submitted to IEC/TC 64. 6 TS 61201 IEC:2007 USE OF CONVENTIONAL TOUCH VOLTAGE LIMITS APPLICATION GUIDE 1 Scope IEC/TS 61201, which is a technical specification, provides guidance on the use of conventional touch voltage limits with

49、reference to thresholds given in IEC 60479-5. Consideration is given to different physiological effects, environmental conditions, contact conditions, etc. This specification only discusses voltages for sinusoidal a.c. at 50/60 Hz and pure d.c. having no significant a.c. component. This specification does not consider immersion of body parts or medical applications. Touch voltage limits are for use