BS EN 62226-3-1:2007+A1:2017
$198.66
Exposure to electric or magnetic fields in the low and intermediate frequency range. Methods for calculating the current density and internal electric field induced in the human body – Exposure to electric fields. Analytical and 2D numerical models
| Published By | Publication Date | Number of Pages |
| BSI | 2017 | 58 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 5 | English CONTENTS |
| 8 | INTRODUCTION |
| 9 | 1 Scope 2 Exposure to electric field |
| 11 | Figures Figure 1 – Illustration of the phenomenon of currents induced by an electric field in a human body standing on the ground Figure 2 – Potential lines of the electric field generated by an energised wire in the absence of any objects (all distances in metres) |
| 12 | 3 General procedure 3.1 Shape factor 3.2 Procedure |
| 13 | 4 Human body models 4.1 General 4.2 Surface area Figure 3 – A realistic body model |
| 14 | 4.3 Semi-spheroidal model Figure 4 – Scheme of the semi-spheroid simulating a human being standing on a zero potential plane Tables Table 1 – Data for reference man and reference woman |
| 15 | Table 2 – Values of arcsin(e) / e for different values of L/R |
| 16 | 4.4 Axisymmetrical body model Figure 5 – Equivalent spheroid radius, R, versus height, L, and for different mass, M Figure 6 – The axisymmetrical body model for the reference man (left) and woman (right) |
| 17 | 5 Calculation of induced current 5.1 General 5.2 Semi-spheroid Figure 7 – Conductive spheroid exposed to electric field |
| 18 | Figure 8 – Calculation of the shape factor for electric field KE for an spheroid exposed to an unperturbed electric field |
| 19 | Figure 9 – Current density JS induced by an unperturbed electric field (1 kV/m, 50 Hz) in a spheroid versus parameter L/R (values in µA/m²) |
| 20 | Figure 10 – Dimensions and mesh of the semi-spheroid Figure 11 – Distortion of power frequency electric field lines close to the conductive semi-spheroid |
| 21 | 5.3 Axisymmetrical models Table 3 – Derived data using spheroid model at 50 Hz |
| 22 | Figure 12 – Calculated induced current density JA(h) in the body standing in a vertical 50 Hz electric field of 1 kV/m |
| 23 | Table 4 – Electric field EBR required to produce basic restrictions JBR in the neck at 50 Hz |
| 24 | Figure 13 – Computation domain Figure 14 – Mesh of the man body model and distortion of power frequency electric field lines close to model |
| 25 | Figure 15 – Distribution of potential lines and 50 Hz electric field magnitude (man model) Figure 16 – Computation of induced currents JA along a vertical axis, and distribution of induced currents in the man model at 50 Hz |
| 26 | Figure 17 – Mesh of the woman body model and distortion of power frequency electric field lines close to model |
| 27 | Figure 18 – Distribution of potential lines and 50 Hz electric field magnitude (woman model) Figure 19 – Computation of induced currents JA along a vertical axis, and distribution of induced currents in the woman model at 50 Hz |
| 28 | 5.4 Comparison of the analytical and numerical models 6 Influence of electrical parameters 6.1 General 6.2 Influence of permittivity Table 5 – Comparison of values of the shape factor for electric field KE and corresponding current densities for an unperturbed 50 Hz electric field of 1 kV/m |
| 29 | 6.3 Influence of conductivity 6.4 Non-homogeneous conductivity 7 Measurement of currents induced by electric fields 7.1 General 7.2 Current flowing to the ground |
| 31 | Annex A (normative) Analytical solutions for a spheroid in a uniform electric field Figure A.1 – Conductive spheroid exposed to electric field |
| 34 | Annex B (normative) Human body axisymmetrical model |
| 35 | Table B.1 – Measures from antropomorphic survey used to construct vertical dimensions of axisymmetrical model [56] Table B.2 – Measures from antropomorphic survey used to construct the radial dimensions of axisymmetrical model [56] |
| 36 | Figure B.1 – Normalised axisymmetrical models. |
| 37 | Table B.3 – Normalised model dimensions |
| 38 | Table B.4 – Axisymmetric model dimensions for reference man and reference woman whose mass and height are defined by ICRP [38] and are given in Table 1 |
| 39 | Annex C (informative) Child body model Table C.1 – Reference values provided by ICRP for male and female children Table C.2 – Dimensions of the reference children (in m except SBR in m²) |
| 40 | Figure C.1 – Computation of induced currents JZ along a vertical axis, and distribution of induced currents in the 10 years reference child model Table C.3 – Results of analytical method for the reference children |
| 41 | Annex D (informative) Example of use of this standard |
| 42 | Table D.1 – Normalised dimensions of the women model |
| 43 | Table D.2 – Calculation of the dimensions for a specific person |
| 45 | Annex E (informative) Numerical calculation methods |
| 46 | Figure E.1 – Spheroid model |
| 47 | Figure E.2 – Space potential model |
| 48 | Figure E.3 – Example of charge simulation method using rings |
| 49 | Figure E.4 – Superficial charges integral equation method, cutting of the body into N elements |
| 50 | Figure E.5 – Mesh of the body using finite element method |
| 51 | Figure E.6 – Impedance method |
| 53 | Bibliography |
