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. IEC/TR Edition TECHNICAL. REPORT. RAPPORT. TECHNIQUE. Effects of current on human beings and livestock –. Part 5: Touch.
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Characteristics of particular sources and loads.
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. Protection against electric shocks and electrical fires.
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. Views Page Talk View source History.
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The relationship between current and voltage is not linear because the impedance of the human body varies with the touch voltage, and data on this relationship is therefore required.
Hazardous-live-parts shall not be accessible, and accessible conductive parts shall not be hazardous.
Possibility of irreversible effects AC zone: The necessary criterion is the admissible limit of touch voltage i. It has the status of a horizontal standard in accordance with IEC Guide The fundamental rule of protection against electric shock is provided by the document IEC “Protection against electric shock — Common aspects for installations and equipment” which covers both electrical installations and electrical equipment. Electrical fires are caused by overloads, short circuits and earth leakage currents, but also by electric arcs in cables and connections.
How to contribute Play with sandbox Recent changes Help. This page was last modified on 23 Aprilat Basic protection Fault protection. The contents of the corrigenda of October and June have been included in this copy.
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. Personal tools Create account Log in.
This refers to a person coming into contact with a conductor which is live in normal circumstances see Fig. From Electrical Installation Guide. This page has been accessed 21, times. Main page How to browse and search Random page. Isc Abstract IEC The impedance values indicated in this technical specification result from a close examination of the experimental 6047 available from measurements carried out principally on corpses and on some living persons.
Standards and regulations distinguish two kinds of dangerous contact: Connection to the MV utility distribution network. 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.
Contact with live part Direct contact. Contents 1 – Introduction 1. MV and LV architecture selection guide for buildings. TC 64 – Electrical installations and protection against electric shock rss.
The following test report forms are related: Chapter – Protection against electric shocks and electric fires. Retrieved from ” http: Relevant IEC standards include: 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.
Threshold of perception of current B curve: The protection of persons against electric shock in LV installations must be 6079 in conformity with appropriate national standards, statutory regulations, codes of practice, official guides and circulars etc. Our prices are in Swiss francs CHF. Its passage affects essentially the muscular, circulatory and respiratory functions and sometimes results in serious burns.
Connection to the LV utility distribution network. Contact with parts in fault conditions Indirect contact.
Do you need a multi-user copy? Ventricular fibrillation unlikely to happen C 2 curve: Protection measures are described in Ic against electrical fire risks.
Sizing and protection of conductors. We accept all major credit cards American Express, Mastercard and VisaPayPal and bank transfers as form of payment. 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. Energy Efficiency in electrical distribution. Threshold of muscular reactions C 1 curve: An electric shock is the pathophysiological effect jec an electric current through the human body.
Residential premises and other special locations.