DS DS/EN 50011
DS DSEN 50011 1994-AUG-23 Low voltage swtchgear and controlgear for ndustral use - Termnal markng dstnctve number and dstnctve letter for partcular contactor relays
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This standard applies to contactor relays according to IEC standard 337, having specific relative positions of the contact elements and an associated terminal numbering sequence.