DS/ETSI EN 300 132-3 V2.2.1:2021

Environmental Engineering (EE); Power supply interface at the input of Information and Communication Technology (ICT) equipment; Part 3: Up to 400 V Direct Current (DC)

The present document contains requirements and measurements methods for the physical interface A3 that is situated*between the power supply system(s) and the power consuming ICT equipment:*• the nominal voltage at power interface A3 of ICT equipment defined in the present document is DC voltage up*to 400 V;*• the output performance of the power equipment including the cable network at the interface A3;*• the input of the ICT equipment connected to interface A3.*The DC power can be supplied by a DC output power system e.g. via on-grid AC rectifiers, from DC/DC converters in*solar systems, fuel cells, standby generators including a battery backup.*The present document aims at providing compatibility at interface A3 between the power supply equipment and different*ICT equipment (including/monitoring, cooling system, etc.) connected to the same power supply.*The requirements are defined for the purpose of the present document:*• to identify a power supply system with the same characteristics for all ICT equipment defined in the area of*application; the area of application may be any location where the interface A3 is used i.e.*telecommunication centres, Radio Base Stations, datacentres and customer premises;*• to facilitate interworking of different loads;*• to facilitate the standardization of power supply systems for ICT equipment;*• to facilitate the installation, operation and maintenance in the same network of ICT equipment and systems*from different origins.*• to secure robustness against temporary voltage deviations and transients during abnormal conditions*General requirements for safety and EMC are out of the scope of the present document series unless specific*requirement not defined in existing safety or EMC standards.