NF C63-154*NF EN 60947-5-4:2004 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.
1997NF C63-154:1997 Low-voltage switchgear and controlgear. Part 5 : control circuit devices and switching elements. Section 4 : methods of assessing the performance of low energy contacts. Special tests.