IEC TS 60479-1:2005 PDF Download

IEC TS 60479-1:2005 is a standard that deals with the hazards and effects of electrical currents on humans and animals. The standard focuses on the magnitude and duration of current flow as the main factors determining the danger posed to individuals. However, it acknowledges that the specified time/current zones may not be directly applicable in practical situations when designing measures of protection against electrical shock.

The standard introduces the concept of touch voltage, which is the product of the current through the body (touch current) and the body impedance. The values of touch voltage that are considered safe depend on various factors, such as the current path, duration of current flow, frequency, moisture of the skin, surface area of contact, pressure exerted, and temperature. The relationship between current and voltage is not linear due to the variation in body impedance with touch voltage.

The standard provides information on the impedance of different parts of the human body, including the skin, blood, muscles, tissues, and joints. These impedance values are determined based on experimental measurements conducted on both corpses and living persons. The standard has the status of a horizontal standard in accordance with IEC Guide 104, indicating its wide applicability across various industries and sectors.

It is worth noting that the standard incorporates the contents of corrigenda released in October 2006 and June 2013. These corrigenda likely address any errors or updates that were identified after the initial publication.