UNE-EN 60947-5-4:2005 Low-voltage switchgear and controlgear -- Part 5-4: Control circuit devices and switching elements - Method of assessing the performance of low-energy contacts - Special tests
2020UNE-EN 60947-5-4:2005/A1:2020 Low-voltage switchgear and controlgear - Part 5-4: Control circuit devices and switching elements - Method of assessing the performance of low-energy contacts - Special tests
2005UNE-EN 60947-5-4:2005 Low-voltage switchgear and controlgear -- Part 5-4: Control circuit devices and switching elements - Method of assessing the performance of low-energy contacts - Special tests