UR E - Electrical and Electronic Installations

UR E21 Requirements for uninterruptible power system (UPS) units as alternative and/or transitional power - Rev.1 Feb 2021 Clean

UR E22 On board use and application of computer based systems - Rev.2 June 2016

UR E23 Deleted

UR E23 Selection of low voltage circuit breakers on the basis of their short circuit capacity and co-ordination in service - Deleted Mar 2011

UR E24 Harmonic Distortion for Ship Electrical Distribution System including Harmonic Filters Rev.1 Dec 2018 Clean

UR E25 Failure detection and response of all types of steering control system - Rev.1 Dec 2019 Clean

Note: UR E25 Rev.2 will come into force on 1 July 2023 and can be found in "Revision History"

UR E26 New

UR E26 Cyber resilience of ships - New Apr 2022

Note: UR E26 will come into force on 1 January 2024

UR E27 New

UR E27 Cyber resilience of on-board systems and equipment - New Apr 2022

Note: UR E27 will come into force on 1 January 2024

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