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Fibre optic interconnecting devices and passive components. Fibre optic connector interfaces - Type URM connector family. Original standard UNE-EN 61754-34-2016 in PDF full version. Additional info + preview on request

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Superconductivity - Superconducting electronic devices. Generic specification for sensors and detectors. Original standard UNE-EN 61788-22-1-2017 in PDF full version. Additional info + preview on request

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Electromechanical elementary relays - Reliability. Original standard UNE-EN 61810-2-2017 in PDF full version. Additional info + preview on request

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Electrical insulation systems. Procedures for thermal evaluation - Applications with a designed life of 5 000 h or less. Original standard UNE-EN 61857-31-2017 in PDF full version. Additional info + preview on request

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Hazard and operability studies (HAZOP studies). Application guide. Original standard UNE-EN 61882-2017 in PDF full version. Additional info + preview on request

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Amendment 1 - Secondary cells and batteries containing alkaline or other non-acid electrolytes - Secondary sealed cells and batteries for portable applications - Part 1- Nickel-cadmium. Original standard UNE-EN 61951-1-2017 A1-2023 in PDF full version. Additional info + preview on request

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