EN 50171:2021

Central safety power supply systems

This document specifies the general requirements for central power supply systems for an independent energy supply to essential safety equipment. This document covers systems that are permanently connected to AC supply voltages not exceeding 1 000 V and use batteries as an alternative power source. Central safety power supply systems are intended to ensure energy supply to emergency escape lighting in the event of normal supply failure and could be suitable for energizing other essential safety equipment, for example: - electric circuits of automatic fire extinguishing installations; - paging systems and signalling safety installations; - smoke extraction equipment; - carbon monoxide warning systems; - special safety installations related to specific buildings, e.g. high-risk areas. The power supply of CPS systems is expected to be dedicated only to the essential safety equipment, and not for other type of loads such as general purpose IT or industrial systems etc. Combinations of the aforementioned safety equipment types can be used together on the same central safety power supply system providing the availability for safety equipment loads is not impaired. A fault occurring in a circuit is expected to not cause the interruption in any other circuit used to supply essential safety equipment. Schematic representations of typical central safety power supply equipment are depicted in Clause 4. Power supply systems for fire alarm equipment that are covered by EN 54 (series) are excluded.

Zentrale Sicherheitsstromversorgungssysteme

Systèmes d'alimentation de sécurité à source centrale

Le présent document définit les exigences générales relatives aux systèmes d'alimentation à source centrale des équipements spécifiques de sécurité. Le présent document couvre les systèmes connectés en permanence aux sources de courant alternatif dont la tension ne dépasse pas 1 000 V et qui utilisent comme source d’alimentation alternative des batteries. Les systèmes d'alimentation de sécurité à source centrale sont destinés à alimenter l'éclairage de sécurité en cas de défaillance de l'alimentation normale et peuvent être adaptés à l'alimentation d'autres équipements spécifiques de sécurité, par exemple: — circuits électriques des installations automatiques pour l'extinction des incendies; — systèmes de messagerie et installations de signalisation de sécurité; — matériel de désenfumage; — systèmes de détection du monoxyde de carbone; — installations de sécurité spécifiques à certains bâtiments, par exemple zones à haut risque. Il est prévu de réserver l’alimentation des systèmes ASC uniquement aux équipements spécifiques de sécurité, et non aux autres types de charges tels que les technologies TI à usage général ou les systèmes industriels, etc. Les types d’équipements de sécurité susmentionnés peuvent être combinés sur le même système d’alimentation de sécurité à source centrale à condition de ne pas compromettre la disponibilité des charges d’équipements de sécurité. Il est prévu qu’un défaut constaté dans un circuit ne provoque pas l’interruption de tout autre circuit utilisé pour alimenter des équipements spécifiques de sécurité. Des représentations, sous forme de schémas, d’équipements typiques d'alimentation de sécurité à source centrale figurent à l’Article 4. Les systèmes d’alimentation des systèmes d’alarme incendie couverts par l’EN 54 (série) sont exclus.

Centralni varnostni napajalni sistemi

Ta evropski standard določa splošne zahteve za centralne napajalne sisteme, ki zagotavljajo neodvisno oskrbo z energijo za nujno potrebno varnostno opremo. Ta standard zajema sisteme, ki so trajno priključeni na izmenično napajalno napetost do največ 1000 V in kot alternativni vir energije uporabljajo baterije.
Centralni varnostni napajalni sistemi so namenjeni za zagotavljanje oskrbe z energijo za razsvetljavo zasilnega izhoda v primeru običajnega izpada napajanja in so lahko primerni za napajanje druge nujno potrebne varnostne opreme, na primer:
– električnih tokokrogov samodejnih naprav za gašenje požara;
– sistemov za osebni klic in signalnih varnostnih naprav;
– opreme za odvod dima;
– sistemov za zaznavanje ogljikovega monoksida;
– posebnih varnostnih naprav, povezanih s posameznimi stavbami (npr. območja z visokim tveganjem).
Centralni napajalni sistemi (CPS) naj bodo namenjeni zgolj za napajanje nujno potrebne varnostne opreme in ne za napajanje drugih vrst opreme (npr. IT za splošne namene, industrijski sistemi itd.).
Omenjene vrste varnostne opreme in/ali opreme, ki ni varnostna, se lahko v okviru istega centralnega varnostnega napajalnega sistema uporabljajo skupaj pod pogojem, da to ne vpliva na razpoložljivost varnostne opreme. Zaradi okvare tokokroga ne sme biti prekinjeno delovanje nobenega drugega tokokroga, ki se uporablja za napajanje varnostne opreme.
Shematski prikaz tipične centralne varnostne napajalne opreme je na voljo v točki 4.
Na področje uporabe ne spadajo napajalni sistemi opreme za požarni alarm, ki so zajeti v skupini standardov EN 54.

General Information

• Status: Published
• Publication Date: 16-Dec-2021
• ICS: 29.240 - Power transmission and distribution networks
• Technical Committee: CLC/TC 22X - Power electronics
• Drafting Committee: CLC/TC 22X - Power electronics
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 17-Dec-2021
• Due Date: 24-Feb-2021
• Completion Date: 17-Dec-2021
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Ref Project: SIST EN 50171:2022 - Central safety power supply systems

Relations

• Replaces: EN 50171:2001 - Central power supply systems
• Effective Date: 23-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 50171:2022
01-marec-2022
Nadomešča:
SIST EN 50171:2002
Centralni varnostni napajalni sistemi
Central safety power supply systems
Zentrale Sicherheitsstromversorgungssysteme
Systèmes d'alimentation de sécurité à source centrale
Ta slovenski standard je istoveten z: EN 50171:2021
ICS:
29.200 Usmerniki. Pretvorniki. Rectifiers. Convertors.
Stabilizirano električno Stabilized power supply
napajanje
SIST EN 50171:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50171:2022

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SIST EN 50171:2022


EUROPEAN STANDARD EN 50171

NORME EUROPÉENNE

EUROPÄISCHE NORM December 2021
ICS 29.240 Supersedes EN 50171:2001 and all of its amendments
and corrigenda (if any)
English Version
Central safety power supply systems
Systèmes d'alimentation de sécurité à source centrale Zentrale Sicherheitsstromversorgungssysteme
This European Standard was approved by CENELEC on 2021-11-15. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.



European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 50171:2021 E

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SIST EN 50171:2022
EN 50171:2021 (E)
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 7
4 Operating modes of central safety power supply systems . 9
4.1 General provisions . 9
4.2 Changeover mode . 9
4.3 Mode without interruption . 10
4.4 Changeover mode with an additional control switching device for central switching of the
load . 10
4.5 Changeover mode with an additional control switching device for partial switching of the
load . 10
4.6 Non-maintained changeover mode . 11
4.7 Mode without interruption with an additional control switching device for central switching of

the load . 11
5 Operating conditions and requirements . 11
5.1 Normal oper
...