標準號：IEC/TR 60479-5-2007
中文標準名稱：電流對人和家畜的影響.第5部分:生理影響的接觸電壓閾值
英文標準名稱：Effects of current on human beings and livestock - Part 5: Touch voltage threshold values for physiological effects
標準類型：K09
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：K09
引用標準：IEC 60050-195;IEC/TS 60479-1-2005;IEC 60990
適用范圍：IEC/TR 60479-5, which is a technical report, provides touch voltage-duration combinationthresholds based on analysis of information concerning body impedances and currentthresholds of physiological effects, as given in IEC/TS 60479-1. Such threshold combinationsrelate to specific environmental and contact conditions that determine body impedance forparticular current pathways.This technical report considers only(i) 50/60 Hz sinusoidal alternating voltage having no other frequency components and nosignificant direct voltage component, and(ii) direct voltage with no significant alternating component.This technical report provides thresholds as a result of calculations based on values fromIEC/TS 60479-1, with uncertainties. Therefore thresholds proposed in this report alsocorrespond to values with uncertainties.This technical report does not consider immersion of body parts and medical application.Touch voltage-duration combination thresholds are for use by technical committees asguidance for the determination of limits for touch voltage and touch voltage durations invarious environmental situations.Determination of limits needs to be based on risk assessment. Factors that are part of riskassessment include voltage threshold values (taking into account contact area, skin moisturecondition, body current pathway) provided by this technical report, as well as other factors notcovered such as:– reduction of the likelihood of contact (by obstacles, barriers, warnings, placing out ofreach, training, etc.); or– reduction of touch voltage compared to the fault voltage (such as by equipotentialbonding); or– additional resistance in series with the human body (such as gloves, shoes, carpet, etc.).