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Corrigendum - Alarm systems - Social alarm systems - Part 3: Local unit and controller. Original standard UNE-EN 50134-3-2012 AC-2015 in PDF full version. Additional info + preview on request

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Amendment 1 - Alarm systems - Alarm transmission systems and equipment Part 1: General requirements for alarm transmission systems. Original standard UNE-EN 50136-1-2012 A1-2019 in PDF full version. Additional info + preview on request

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Alarm systems. Alarm transmission systems and equipment - Requirements for Supervised Premises Transceiver (SPT). Original standard UNE-EN 50136-2-2013 in PDF full version. Additional info + preview on request

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Alarm systems - Alarm transmission systems and equipment - Part 3: Requirements for Receiving Centre Transceiver (RCT). Original standard UNE-EN 50136-3-2014 in PDF full version. Additional info + preview on request

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Railway applications. Fixed installations. Electric traction. Copper and copper alloy grooved contact wires. Original standard UNE-EN 50149-2012 in PDF full version. Additional info + preview on request

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Railway applications. Fixed installations. Particular requirements for a.c. switchgear - Measurement, control and protection devices for specific use in a.c. traction systems. Current transformers. Original standard UNE-EN 50152-3-2-2016 in PDF full version. Additional info + preview on request

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