IEC TS Effects of current on human beings and livestock -. Part 1: General aspects. • IEC TS Effects of current on. Protection measures are described in sections 1 to 8. IEC publication updated in defines four zones of current-magnitude. Comply with a (yet to be developed) authoritative NZ specific set of Power Coordination hazard voltage limits, calculated from IEC on a similar.
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Views Page Talk View source History. This page was last edited on 14 Octoberat Connection to the MV utility distribution network. Sizing and protection of conductors. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
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. The necessary criterion is the admissible limit of touch voltage i. Protection against electric shocks and electrical fires.
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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. 60497 protection Fault protection. Do you need a multi-user copy? We accept all major credit cards American Express, Mastercard and VisaPayPal and bank transfers as form of payment. 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.
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.
The impedance values indicated in this technical specification result from a close examination of the experimental results available from measurements carried out ied on corpses and on some living persons.
An electric shock is the pathophysiological effect of an electric current through the human body. This refers to a person coming into contact with a conductor which is live in normal circumstances see Fig.
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. The contents of the corrigenda of October and June have been included in this copy. Connection to the LV utility distribution network. Standards and regulations distinguish two kinds of dangerous contact: Electrical fires are caused by overloads, short circuits and earth leakage currents, but also by electric arcs in cables and connections.
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 guides and circulars etc.
Personal tools Create account Log in. The following test report forms are related: MV and LV architecture selection guide for buildings. Its passage affects essentially the muscular, circulatory and respiratory functions and sometimes results in serious burns.
The values of body impedance depend on a 6479 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 parts in fault conditions Indirect contact.
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.
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: This page was last modified on 23 Aprilat From Electrical Installation Guide. Chapter – Protection against electric shocks and electric fires.
Ventricular fibrillation unlikely to happen C 2 curve: Threshold of perception of current B curve: This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. Preview Abstract IEC Characteristics of particular sources and loads. Energy Efficiency in electrical distribution.
Main page How to browse and search Random page. 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.