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BS EN 50171:2021 – TC:2022 Edition

BS EN 50171:2021 – TC:2022 Edition

$186.33

Tracked Changes. Central safety power supply systems

Published By Publication Date Number of Pages
BSI 2022 70
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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.

PDF Catalog

PDF Pages PDF Title
1 30451180
41 A-30386323
42 undefined
47 1 Scope
2 Normative references
49 3 Terms and definitions
51 4 Operating modes of central safety power supply systems
4.1 General provisions
4.2 Changeover mode
52 4.3 Mode without interruption
4.4 Changeover mode with an additional control switching device for central switching of the load
4.5 Changeover mode with an additional control switching device for partial switching of the load
53 4.6 Non-maintained changeover mode
4.7 Mode without interruption with an additional control switching device for central switching of the load
5 Operating conditions and requirements
5.1 Normal operating conditions and requirements for central safety power supply systems
54 5.2 Requirements to be specified by the user
6 Constructional design
6.1 General requirements
6.2 Structure of enclosures
55 6.3 Battery chargers and rectifiers
56 6.4 Transformers
6.5 Switchgear and controlgear
57 6.6 Central inverters/group inverters/converters
58 6.7 Deep discharge protection
6.8 Monitoring and display equipment
59 6.9 Fuses, protective devices and measuring instruments
60 6.10 Internal wiring
6.11 Electric strength
6.12 Test systems
61 6.13 Batteries
62 6.14 Equipment marking
64 6.15 Warning labels
7 Required information for safe installation and operation of central safety power supply systems
7.1 Documentation
65 7.2 Additional Information
7.3 Information on Recurring Test
66 7.4 Battery installation and provisions for maintenance
8 Tests
8.1 General
8.2 Verification required before commissioning

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BS EN 50171:2021 - TC
$186.33