Centralsafetypowersupplysystems
Nationalforeword
This British Standard is the UK implementation of EN 50171:2021.It supersedes BS EN 50171:2001 which will be withdrawn on 15November 2024.
Committee PEL/22 Power electronics. The UKparticipationinits preparation was entrusted toTechnical
Alist of organizationsrepresented on thismitteecanbeobtained onrequest to its mittee manager.
Contractual and legal considerations
This publicationhasbeen preparedin goodfaith howevernoimpliedisorwillbemadeandnoresponsibility orliabilityisorwillbeaccepted by BSIinrelation to the adequacyaccuracy pleteness or reasonableness of this publication.All and any suchresponsibility andliability is expressly disclaimed to the full extent permittedby the law.
This publication is provided as is and is tobe used at the recipient's own risk.
The recipient is advised to consider seeking professional guidance withrespect to its use of this publication.
This publicationisnot intended to constitute a contract.Usersareresponsible for its correct application.
Published by BSI Standards Limited 2022 The British Standards Institution 2022
ISBN 978 0 539 22019 3
ICS 29.240; 29.240.01; 91.140.50
Compliance with a BritishStandard cannot confer immunityfromlegal obligations.
Standards Policy and Strategy Committee on 31 December 2021. This BritishStandard was published under the authority of the
Amendments/corrigenda issued since publication
Date Textaffected31 May 2022 Correction to supersession details in national foreword
EN50171
Supersedes EN 50171:2001 and allofits amendmentsand corrigenda (if any)
EnglishVersion
Central safetypower supplysystems
Systemes d'alimentatien de stcurite a source centrale
Zentrale Sicherheitsstromversorgungssysteme
This EuropeanStandard was approved by CENELEC on2021-11-15.CENELECmembers are bound to ply withthe CEN/CENELEC
Up-l-datelistsand bibliographicalreferencesconceing suchnational sandardsmayb obtalned onapplicationto theCE-CENELEC Management Centre or to any CENELEC member.
same status as the oficial versions.
CENELECmembers areth national electrotechical cmmitees ofAustriaBelgumBulgariaCroatiaCyprusteCzechReplicDeaEFrnul Nlnli
European Commitee for Elestrotechnical StandardizationComite EuropeendeNormalisation ElectrotechniqueEuroplisches Komitee fuir Elektrotecnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23 B-1040 Brussels
Contents
Page
European foreword. 41 doos 52 Normative references. 53 Terms and definitions. Operating modes of central safety power supply systems. .74 4.1 General provisions 6” 94.2 Changeover mode. 94.3 Mode without interuption..4.4 Changeovermode withan additional control switching device for central switching of the4.5 Changeovermode with anadditional control switching device for partial switching of the load..load. 104.6 Mode without interruption with anadditional control switching device for central switching of Non-maintained changeovermode. 114.7 the load.. 115 Operating conditions and requirements. 115.1 Normal operating conditions andrequirements forcentralsafetypower supply systems. Requirements to be specified by the user... 115.2 6 Constructional design. 12 .126.1 General requirements. .126.2 Structure of enclosures .126.3 Battery chargers and rectifiers .136.4 Transformers. .146.5 6.6 Switchgear and controlgear. Central inverters/group inverters/converters. 14 .156.7 Deep discharge protection 166.8 Monitoring and display equipment .166.9 Fuses protective devices and measuring instruments. 176.10 Intermal wiring.. Electric strength. .186.11 6.12 Test systems .18 .186.13 Batteries 196.14 Equipment marking .206.15 Warning labels. .227 Required information forsafe installation and operation of central safety power supply systems .227.1 Documentation 22
7.2 Additional Information. 237.3 Information on Recurring Test. 237.4 Battery installation and provisionsformaintenance. 248 Tests. .248.2 8.1 Verification required before missioning General. .24Bibliography- .24 .27
