低压开关设备和控制设备.第5-4部分:控制电路器件和切换元件.低能量触头性能的评估方法.特殊试验

[中文适用范围]： IEC 60947 的这一部分适用于所考虑的使用领域中使用的可分离触点，例如控制电路的开关元件。本标准考虑了两个额定电压区域： a) 高于（含）10 V（通常为 24 V） [外文原描述]： IEC 60947-5-4:2002 applies to separable contacts used in the utilization area considered, such as switching elements for control circuits. This standard takes into consideration two rated voltage areas: a) above (and including) 10 V (typically 24 V) where contacts are used for switching loads with possible electrical erosion, such as programmable controller inputs; b) below 10 V (typically 5 V) with negligible electrical erosion, such as electronic circuits. This second edition cancels and replaces the first edition which was issued as a technical report in 1996. It now has the status of an International Standard.