Historical
IEC 60947-5-1 Ed. 3.1 b:2009
Low-voltage switchgear and controlgear - Part 5-1: Control circuit devices and switching elements - Electromechanical control circuit devices
"IEC 60947-5-1:2003+A1:2009 applies to control circuit devices and switching elements intended for controlling, signalling, interlocking, etc., of switchgear and controlgear. It applies to control circuit devices having a rated voltage not exceeding 1 000 V a.c. (at a frequency not exceeding 1 000 Hz) or 600 V d.c. The technical content is therefore identical to the base edition and its amendment and has been prepared for user convenience. It bears the edition number 3.1. This International Standard should be used in conjunction with IEC 60947-1. This consolidated version consists of the third edition (2003) and its amendment 1 (2009). Therefore, no need to order amendment in addition to this publication. "
International Electrotechnical Commission [iec]