Comply with a (yet to be developed) authoritative NZ specific set of Power Coordination hazard voltage limits, calculated from IEC on a similar. IEC publication updated in defines four zones of current- magnitude /time-duration, in each of which the pathophysiological. IEC TS Effects of current on human beings and livestock -. Part 1: General aspects. • IEC TS Effects of current on.
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The relationship between current 604791 voltage is not linear because the impedance of the human body varies with the touch voltage, and data on this relationship is therefore required.
File:IEC TS electric shock – Wikimedia Commons
The protection of persons against electric shock in LV installations must be provided in conformity with appropriate national standards, statutory regulations, codes of practice, official ief and circulars etc. How to contribute Play with sandbox Recent changes Help. This refers to a person coming into contact with a conductor which is live in normal circumstances see Fig.
Electrical fires are caused by overloads, short circuits and earth leakage currents, but also by electric arcs in cables and connections. The degree of danger for the victim is a function of the magnitude of the current, the parts of the body through which the current passes, and the duration of current flow.
Protection against electric shocks and electrical fires. This file contains additional information iev as Exif metadata which may have been added by the eic camera, scanner, or software program used to create or digitize it.
I, the copyright holder of this work, hereby iiec it under the following licenses:. Our prices are in Swiss francs CHF. An electric shock is the pathophysiological effect of an electric current through the human body.
The different parts of the humanbody such as the skin, blood, muscles, other tissues and joints present to the electric current a certain impedance composed of resistive and capacitive components. Contact with parts in fault conditions Indirect contact.
Threshold of muscular reactions C 1 curve: From Electrical Installation Guide. Personal tools Create account Log in. The contents of the corrigenda of October and June have been included in this copy.
File:IEC TS 60479-1 electric shock graph.svg
Basic protection Fault protection. Preview Abstract IEC Retrieved from ” http: Log-log graph of the effect of alternating current I of duration T passing from left hand to feet as defined in IEC publicationredrawn by CMG Lee based on http: Sizing and protection of conductors.
This page was last edited on 14 Octoberat Threshold of perception of current B curve: Standards and regulations distinguish two kinds of dangerous contact: This refers to a person coming into contact with an exposed conductive-part which is not normally live, but has become live accidentally due to insulation failure or some other cause.
Relevant IEC standards include: 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. Connection to the LV utility distribution network.
TC 64 – Electrical installations and protection against electric shock rss. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. Views Page Talk View source History. Protection measures are described in Protection against electrical fire risks. The values of body impedance depend on a number of factors and, in particular, on current path, on touch voltage, duration of current flow, frequency, degree of moisture of the skin, surface area of contact, pressure exerted and temperature.
The following page uses this file: Contents 1 – Introduction 1. When a current exceeding 30 mA passes near the heart of a human body, the person concerned is in serious danger if the current is not interrupted in a very short time. Ventricular fibrillation unlikely to happen C 2 curve: The following test report forms are related: The following other wikis use this file: Contact with live part Direct contact.
MV and LV architecture selection guide for buildings. Energy Efficiency in electrical distribution. Its passage affects essentially the muscular, circulatory and respiratory functions and sometimes results in serious burns. Possibility of irreversible effects AC zone: Main page How to browse and search Random page. The fault current raises the exposed-conductive-part to a voltage liable to be hazardous as it generates a touch current through a person coming into contact with this exposed-conductive-part see Fig.
Hazardous-live-parts shall not be accessible, and accessible conductive parts shall not be hazardous. Views View Edit History.
Retrieved from ” https: Characteristics of particular sources and loads. We accept all major credit cards American Express, Mastercard and 600479-1PayPal and bank transfers as form of payment. The necessary criterion is the admissible limit of touch voltage i.