IEC 60947-5-4

This section of IEC 60947 is applicable to separable contacts employed within the specific utilization area under consideration, including switching elements for control circuits. The standard addresses two categories of rated voltage areas: a) Above (and including) 10 V (usually 24 V), where contacts are utilized for switching loads that may experience electrical erosion, such […]

This part of IEC 60947 applies to separable contacts used in the uiization area considered,such as switching elements for control circuits. This standard takes into consideration two typical 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