NP EN 60947-5-1-2000 Low-voltage swicthgear and controlgear Part 5-1:Control circuit devices and switching elements-Electromechanical control circuit devices(IEC 60947-5-1:1997)
2001NP EN 60947-5-1-2000 Low-voltage swicthgear and controlgear Part 5-1:Control circuit devices and switching elements-Electromechanical control circuit devices(IEC 60947-5-1:1997)