EN 50171:2021
(Main)Central safety power supply systems
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
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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
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 operating conditions and requirements for central safety power supply systems . 11
5.2 Requirements to be specified by the user . 12
6 Constructional design . 12
6.1 General requirements . 12
6.2 Structure of enclosures . 12
6.3 Battery chargers and rectifiers . 13
6.4 Transformers . 14
6.5 Switchgear and controlgear . 14
6.6 Central inverters/group inverters/converters . 15
6.7 Deep discharge protection . 16
6.8 Monitoring and display equipment . 16
6.9 Fuses, protective devices and measuring instruments . 17
6.10 Internal wiring . 18
6.11 Electric strength . 18
6.12 Test systems . 18
6.13 Batteries . 19
6.14 Equipment marking . 20
6.15 Warning labels . 22
7 Required information for safe installation and operation of central safety power supply
systems . 22
7.1 Documentation . 22
Additional Information . 23
7.2
7.3 Information on Recurring Test . 23
7.4 Battery installation and provisions for maintenance . 24
8 Tests . 24
8.1 General . 24
8.2 Verification required before commissioning . 24
Bibliography . 27
European foreword
This document (EN 50171:2021) has been prepared by CLC/TC 22X “Power electronics”.
The following dates are fixed:
• latest date by which this document has (dop) 2022-11-15
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2024-11-15
standards conflicting with this document
have to be withdrawn
This document supersedes EN 50171:2001 and all of its amendments and corrigenda (if any).
— The scope and the normative references have been updated.
— A new clause, with general safety requirements, has been added.
— A new operation mode "Mode without interruption with an additional control switching device for central
switching of the load" has been added.
— EMC requirements have been added.
— Maximum superimposed alternating currents of the battery charger have been defined.
— Further requirements on inverters and converters have been added.
— A new clause "Test systems" has been added.
— A new chapter "Required Information for safe installation and operation of central safety power supply
Systems” has been added.
— A new chapter "Tests" has been added.
— A new subclause regarding requirements on parallel battery strings has been added.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a Standardization Request given to CENELEC by the European
Commission and the European Free Trade Association.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
1 Scope
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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
EN 1838, Lighting applications - Emergency lighting
EN 50274, Low-voltage switchgear and controlgear assemblies - Protection against electric shock -
Protection against unintentional direct contact with hazardous live parts
EN 50525-2-31, Electric cables - Low voltage energy cables of rated voltages up to and including 450/750 V
(U0/U) - Part 2-31: Cables for general applications - Single core non-sheathed cables with thermoplastic
PVC insulation
EN 60038:2011, CENELEC standard voltages (IEC 60038:2009)
EN 60051 (series), Direct acting indicating analogue electrical measuring instruments and their accessories
(IEC 60051 series)
EN 60146-1-1, Semiconductor converters - General requirements and line commutated converters - Part 1-1:
Specification of basic requirements (IEC 60146-1-1)
EN 60269 (series), Low-voltage fuses (IEC 60269 series)
HD 60364-6:2016, Low-voltage electrical installations - Part 6: Verification (IEC 60364-6:2016)
HD 60364-5-557, Low-voltage electrical installations - Part 5-557: Selection and erection of electrical
equipment - Auxiliary circuits (IEC 60364-5-55)
EN 60445, Basic and safety principles for man-machine interface, marking and identification - Identification
of equipment terminals, conductor terminations and conductors (IEC 60445)
EN 60598-1:2015, Luminaires - Part 1: General requirements and tests (IEC 60598-1:2014)
EN 60622, Secondary cells and batteries containing alkaline or other non-acid electrolytes - Sealed nickel-
cadmium prismatic rechargeable single cells (IEC 60622)
EN 60623, Secondary cells and batteries containing alkaline or other non-acid electrolytes - Vented nickel-
cadmium
...
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