STB PDF
Measuring relays and protection equipment - Functional requirements for frequency protection. Original standard UNE-EN IEC 60255-181-2019 in PDF full version. Additional info + preview on request
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Scales and sizes for plotting frequency characteristics and polar diagrams. Original standard UNE-EN IEC 60263-2020 in PDF full version. Additional info + preview on request
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Sound system equipment - Objective rating of speech intelligibility by speech transmission index. Original standard UNE-EN IEC 60268-16-2020 in PDF full version. Additional info + preview on request
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Sound system equipment - Electrical and mechanical measurements on transducers. Original standard UNE-EN IEC 60268-22-2020 in PDF full version. Additional info + preview on request
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Mechanical structures for electrical and electronic equipment. Dimensions of mechanical structures of the 482,6 mm (19 in) series - Residential racks and cabinets for smart houses. Original standard UNE-EN IEC 60297-3-110-2018 in PDF full version. Additional info + preview on request
Document status: Active
Plugs, socket-outlets and couplers for industrial purposes - Part 5- Dimensional compatibility and interchangeability requirements for plugs, socket-outlets, ship connectors and ship inlets for low-voltage shore connection systems (LVSC). Original standard UNE-EN IEC 60309-5-2020 in PDF full version. Additional info + preview on request
Document status: Active