DS DS/EN 60947-5-3/A1
DS DSEN 60947-5-3A1 2005-JUN-23 Low-voltage swtchgear and controlgear - Part 5-3 Control crcut devces and swtchng elements - Requrements for proxmty devces wth defned behavour under fault condtons PDF
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This part of IEC 60947 applies to proximity devices with an enhanced resistance to failure (PDF). It specifies requirements for four different types of PDF.