IEC 337-1A被替代
Control Switches (low-voltage Switching Devices For Control And Auxiliary Circuits, Including Contactor Relays) - General Requirements - First Supplement
出版：International Electrotechnical Committee
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基本信息
标准编号： IEC 337-1A
标准类别：Standard
出版单位：International Electrotechnical Committee
标准页数：0
标准简介
Gives additional requirements for control switches having a positive opening operation and control switches with positive opening operation and isolating properties.
等同采用的国际标准
HD 420:1988 - Identical
NFC 63 142:1985 - Equivalent
NFC 63 140:1985 - Equivalent
BS 4794-1:1979 - Identical
