United power system and isolated power systems. Relay protection and automation. Automatic emergency control of electric power systems. Device for unloading automation during short circuits. Short circuit severity fixation device. Norms and requirements
Occupational safety standards system. Clothing for protection against high temperature of radiant, convective heat, molten splashes of metal, contact heat, limited flame spread. Technical requirements and test methods
Information technology. Telecommunications and information exchange between systems. High-level data link control (HDLC) procedures. General purpose XID frame information field content and format
€10
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