IEC 60337-1A:1973
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
First supplement - Control switches (low-voltage switching devices for control and auxiliary circuits, including contactor relays) - Part 1: General requirements
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
01-12-1990
English - French, Russian
01-01-1973
Gives additional requirements for control switches having a positive opening operation and control switches with positive opening operation and isolating properties.
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