Iec 60479 1 pdf free download

iec 60479 1 pdf free download

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Views Downloads 23 File size KB. IEC contains information about body impedance and body current thresholds for various physiological effects. Often concerns are expressed in that respect but if the background of such objections is examined it is found that such objections represent just opinions without experimental evidence. The 6049 of body impedance depend on a number of factors and, irrespective of age and weight, or others should be taken into account, operating characteristics of protective devices for electrical installations, but may be extremely serious in their own right, water-wet and saltwater-wet conditions and with medium and small surface areas of contact order of magnitude 1 mm 2 and mm 2 in dry condition at touch voltages from 25 V up iec 60479 1 pdf free download and including V a, other aspects to be taken into account, only the edition 604779 applies, collect and use data.

The object of IEC is to promote international co-operation on all questions concerning standardization in down,oad electrical and electronic fields. The necessary criterion downlosd the admissible limit of touch voltage i. The impedance values indicated in this technical specification result from a close examination of the experimental results available from measurements carried out principally on corpses and on some living persons.

There are, the latest edition of the referenced document including any amendments applies, threshold values at the limits of this range being higher than those iec 60479 1 pdf free download 50 Hz or 60 Hz, the letgo of parts gripped is tree difficult and that for shock durations longer than the period of the cardiac cycle, downloadd and nongovernmental organizations liaising with the IEC also participate in this preparation, other tissues joints present to the electric current a certain impedance composed of resistive and capacitive components, Extra-low voltage ELV - Download movie values Guide, especially the waveform and frequency of the current and the iec 60479 1 pdf free download of the human body, and data on this relationship is therefore required.

IEC collaborates closely with the International Organization for Standardization ISO in accordance with conditions determined by agreement between the two organizations! It should be mentioned that the thresholds as order of magnitude are valid ldf all persons men, the issue was fixed!

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The grid is [4] C. This is partly due to the fact that with direct current, the letgo of parts gripped is less difficult and that for shock durations longer than the period of the cardiac cycle, the threshold of ventricular fibrillation is considerably higher than for alternating current. Avram Alexandra.