158-1C THIRD SUPPLEMENT 1982 S/SApplies to contactors intended for closing and opening electric circuits with the voltage not higher than 1000V a.c. or 1200V d.c. and, if combined with suitable relays for protecting these circuits against overload which may occur therein. States the characteristics of the contactors, the conditions with which they shall comply, the tests and the data to be marked on apparatus.

IEC 60947-4-1 Ed. 2.1

BS 5424-1:1977 - Similar

NFC 63 110:1981 - Equivalent

HD 419.1:1981 - Identical

SS 428 06 00:1984 - Identical

NEN EN 50012:1978 - Identical

UNE 20109-1:1989 - Identical