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Electromechanical elementary relays - General and safety requirements for reed relays. Original standard BS EN IEC 61810-4-2020 in PDF full version. Additional info + preview on request

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Time relays and coupling relays for industrial and residential use - Requirements and tests. Original standard BS EN IEC 61812-1-2024 in PDF full version. Additional info + preview on request

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Electrical installations for lighting and beaconing of aerodromes - Fundamental principles. Particular requirements for series circuits. Original standard BS EN IEC 61820-1-2-2024 in PDF full version. Additional info + preview on request

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Electrical installations for aeronautical ground lighting at aerodromes - Fundamental principles. Original standard BS EN IEC 61820-1-2019 in PDF full version. Additional info + preview on request

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Electrical installations for lighting and beaconing of aerodromes - Requirements for power supplies. Particular requirements for series circuits. Original standard BS EN IEC 61820-3-2-2023 in PDF full version. Additional info + preview on request

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Electrical installations for lighting and beaconing of aerodromes - Safety secondary circuits in series circuits. General safety requirements. Original standard BS EN IEC 61820-3-4-2023 in PDF full version. Additional info + preview on request

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