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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Main page Kec to browse and search Random page. Threshold of muscular reactions C 1 curve: Chapter – Protection against electric shocks and electric fires. 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.
Characteristics of particular sources and loads. Protection against electric shocks and electrical fires. Contents 6479 – Introduction 1. Energy Efficiency in electrical distribution. Views Page Talk View source History. Basic protection Fault protection.
An electric shock is the pathophysiological effect of an electric current through the human body. Contact with parts in fault conditions Indirect contact. 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.
Personal tools Create account Log in. The degree of danger for the victim is a function of 60497 magnitude of the current, the parts of the body through which the current passes, and the duration of current flow.
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. Our prices are in Swiss francs CHF. This page was last modified on 23 Aprilat 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.
From Electrical Installation Guide. Hazardous-live-parts shall not be accessible, and accessible conductive parts shall not be hazardous. TC 64 – Electrical installations and protection against electric shock rss. Its passage affects essentially the muscular, circulatory and respiratory functions and sometimes results in serious burns.
Possibility of irreversible effects AC zone: The different parts of the humanbody such as the skin, blood, muscles, 06479 tissues and joints present to the electric current a certain impedance composed of resistive and capacitive components. Residential premises and other special locations. This page has been accessed 21, times.
Protection against electric shock – Electrical Installation Guide
This refers to a person coming into contact with a conductor which is live in normal circumstances see Fig. The contents of the corrigenda of October and June have been included in this ifc. Electrical fires are caused by overloads, short circuits and earth leakage currents, but also by electric arcs in cables and connections. Retrieved from ” http: 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.
Preview Abstract IEC Kec to the MV utility distribution network. The necessary criterion is the admissible limit of touch voltage i. It has the status of a horizontal standard in accordance with IEC Guide 660479 We accept all major credit cards American Express, Mastercard and VisaIwc and bank transfers as form of payment.
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. Relevant IEC standards include: The protection of persons against electric shock in LV installations must be provided in 06479 with appropriate national standards, statutory regulations, codes of practice, official guides and circulars etc.
Threshold of perception of current B curve: Sizing and protection of conductors. Standards and regulations distinguish two kinds of dangerous contact: The following test report forms are related: MV and LV architecture selection guide for buildings.
When a current exceeding 30 mA passes near the heart of a human body, the 60497 concerned is in serious danger if the current is not interrupted in a very short time. Connection to the LV utility distribution network. Ventricular fibrillation unlikely to happen C 2 curve: Do you need a multi-user copy?