1、BRITISH STANDARD BS EN 50171:2001 Central power supply systems The European Standard EN 50171:2001 has the status of a British Standard ICS 29.200; 91.160.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 50171:2001 This British Standard, having been prepared under the d
2、irection of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 23 August 2001 BSI 23 August 2001 ISBN 0 580 38394 6 National foreword This British Standard is the official English language version of EN 50171
3、:2001, including corrigendum August 2001. For guidance in the application of this standard, attention is drawn to the following British Standards: BS 5266-1:1999, Emergency lighting Part 1: Code of practice for the emergency lighting of premises other than cinemas and certain other specified premise
4、s used for entertainment; BS 5266-7:1999, Emergency lighting Part 7: Lighting applications Emergency lighting. Emergency lighting systems are normally used in conjunction with luminaires conforming to the following British Standard: BS EN 60598-2-22:1999, Luminaires Part 2-22: Particular requirement
5、s Luminaires for emergency lighting. The UK participation in its preparation was entrusted by Technical Committee CPL/34, Lamps and related equipment, to Subcommittee CPL/34/9, Emergency lighting, which has the responsibility to: A list of organizations represented on this subcommittee can be obtain
6、ed on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” fac
7、ility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal oblig
8、ations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This d
9、ocument comprises a front cover, an inside front cover, the EN title page, pages 2 to 20, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD
10、EN 50171 NORME EUROPENNE EUROPISCHE NORM May 2001 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2001 CENELEC - All rights of e
11、xploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50171:2001 E ICS 29.240.00 Incorporating corrigendum August 2001 English version Central power supply systems Systmes dalimentation source centrale Zentrale Stromversorgungssysteme This European Standard was
12、 approved by CENELEC on 2000-08-01. 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
13、 national standards may be obtained on application to the Central Secretariat 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 la
14、nguage and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal
15、, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 50171:2001 BSI 08-2001 Foreword This European Standard was prepared by the CENELEC BTTF 62-8, Emergency lighting systems. The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50171 on 2000-08-01. This Europ
16、ean Standard is intended to replace, in part, national standards relating to central power supply systems. For emergency lighting systems it should be read in conjunction with the standards being produced by CENELEC BTTF 62-8 and EN 1838, Emergency lighting. The following dates were fixed: latest da
17、te by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2001-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2003-08-01Page 3 EN 50171:2001 BSI 08-2001 Contents Page 1 Sco
18、pe. 4 2 Normative references. 4 3 Definitions 5 4 Types of central power supply systems 7 5 Operating conditions and requirements 10 6 Construction. 11 7 Information for installation and operation of central power supply systems 19 Annex A (informative) System testing. 20Page 4 EN 50171:2001 BSI 08-
19、2001 1 Scope This European Standard specifies the general requirements for central power supply systems for an independent energy supply to essential safety equipment. This standard covers systems permanently connected to AC supply voltages not exceeding 1 000 V and that use batteries as the alterna
20、tive power source. The central power supplies are intended to energize emergency escape lighting in the case of failure of the normal supply, and may be suitable for energizing other essential safety equipment, for example: - electrical circuits of automatic fire extinguishing installations; - pagin
21、g systems and signalling safety installations; - smoke extraction equipment; - carbon monoxide warning systems; - specific safety installations related to specific buildings, e.g. high-risk areas. Schematic representations of typical central power supply equipment are depicted in clause 4. When a UP
22、S system is used to feed these essential safety systems, it must comply with EN 50091-1 and its relevant parts, and the additional requirements of this standard. The power supply system for fire alarms covered by EN 54 are excluded. 2 Normative references This European Standard incorporates by dated
23、 or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard on
24、ly when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 1838 Lighting applications Emergency lighting. EN 50091-1-1 Uninterruptible power systems (UPS) Part 1-1: General and safety requirements for UPS used in operator
25、 access areas. EN 50091-1-2 Uninterruptible power systems (UPS) Part 1-2: General and safety requirements for UPS used in restricted access locations. EN 50272-2 Safety requirements for secondary batteries and battery installations Part 2: Stationary batteries. EN 60051 (series) Direct acting indica
26、ting analogue electrical measuring instruments and their accessories. EN 60146-1-1 Semiconductor convertors General requirements and line commutated convertors Part 1-1: Specifications of basic requirements. EN 60285 Alkaline secondary cells and batteries Sealed nickel-cadmium cylindrical rechargeab
27、le single cells. EN 60417 (series) Graphical symbols for use on equipment.Page 5 EN 50171:2001 BSI 08-2001 EN 60598-1 Luminaires Part 1: General requirements and tests. (IEC 60598-1, mod.) EN 60598-2-22 Luminaires Part 2-22: Particular requirements Luminaires for emergency lighting. (IEC 60598-2-22,
28、 mod.) EN 60622 Sealed nickel-cadmium prismatic rechargeable cells. EN 60623 Vented nickel-cadmium prismatic rechargeable single cells. EN 60896-1 Stationary lead-acid batteries General requirements and methods of test Part 1: Vented types. EN 60896-2 Stationary lead-acid batteries General requireme
29、nts and methods of test Part 2: Valve regulated types. EN 60898 Circuit breakers for overcurrent protection for household and similar protection. (IEC 60898, mod.) EN 60947-2 Low-voltage switchgear and controlgear Part 2: Circuit-breakers. EN 60947-4-1 Low-voltage switchgear and controlgear Part 4-1
30、: Contactors and motor-starters Electromechanical contactors and motor-starters. EN 61032:1998 Protection of persons and equipment by enclosures Probes for verification. EN 61558-2-6 Safety of power transformers, power supply units and similar Part 2-6: Particular requirements for safety isolating t
31、ransformers for general use. HD 21 (series) Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V. HD 472 S1 Nominal voltages for low-voltage public electricity supply systems. (IEC 60238:1983, mod.) 3 Definitions For the purposes of this standard, the following definit
32、ions apply. 3.1 automatic transfer switching device (ATSD) device arranged to connect the emergency supply automatically to the essential safety equipment circuit(s) on failure of the normal supply or to transfer the load from the normal supply to the battery 3.2 battery charger part of the equipmen
33、t that provides the charge to the battery from the normal supply 3.3 inverter device for the conversion of direct current (DC) to alternating current (AC)Page 6 EN 50171:2001 BSI 08-2001 3.4 changeover mode mode in which the emergency power supply source is kept on standby where in cases of failure
34、of the normal supply the emergency power supply is automatically transferred to the essential safety equipment 3.5 converter device for changing the voltage of a direct current supply 3.6 mode without interruption mode in which the emergency power supply source operates in parallel to the normal sup
35、ply, connected to the load and supplies power without interruption when the normal supply fails 3.7 control switch device (CSD) device arranged to automatically supply one or several circuits from the emergency power source on failure of the normal supply This device may be manually controlled as re
36、quired by the application standard. 3.8 deep discharge protection device device to protect the battery against deep discharge 3.9 rated supply voltage (mains input) supply voltage or voltages assigned to the equipment by the manufacturer for the specified operating condition of the equipment 3.10 ra
37、ted output current (of a system) current, in amperes, of a system supplied at nominal voltage 3.11 normal supply source of electrical energy used to provide normal power supply 3.12 rated duration of the system designed period of time during which the load can be supplied whilst the system stays wit
38、hin specified voltage limits 3.13 nominal battery voltage suitable approximate value of voltage used to designate or identify a system calculated on the basis of 2 V per cell for lead acid cells and 1,2 V per cell for nickel cadmium cells 3.14 nominal system voltage declared output voltage of a cent
39、rally supplied emergency power system 3.15 minimum voltage voltage of the supply at the end of rated durationPage 7 EN 50171:2001 BSI 08-2001 3.16 earth leakage indication device to indicate a leakage to earth from either pole of the battery or load circuit only when connected to the battery 3.17 ma
40、ins failure indication device to indicate a failure of the normal supply 3.18 phase or final circuit failure detector device which monitors the normal supply to separate circuits or phases providing normal power supply and which automatically initiates the emergency power supply on failure of the no
41、rmal supply to any of the monitored circuits 3.19 central power supply system (CPS-System) central power supply system which supplies the required emergency power to essential safety equipment without any restriction in power output 3.20 low power supply system (LPS-System) central power supply syst
42、em with a limitation of the power output of the system at 500 W for 3 h or 1 500 W for 1 h duration 3.21 equipment input power power rating of the power supply equipment for connection to the mains 3.22 essential safety equipment devices required by the relevant authority to protect people in the ev
43、ent of a hazard 4 Types of central power supply systems In order to comply with the different operating requirements of the essential safety equipment, various types of central power supply systems are necessary. This clause describes the basic types and their essential characteristics. In general t
44、wo different modes of power supply are defined, i.e. the changeover mode and the mode without interruption. The main difference is the response (changeover) time. In the changeover mode, the response time shall be no more than 0,5 s whilst in the mode without interruption the supply is permanent so,
45、 by its nature, there is no response time. The load, the level of discharge and the capacity of the battery determine the rated duration in the case of a power failure. Where the load requires an AC supply an inverter is included in the circuit. Where a DC supply is required a converter circuit is i
46、ncluded.Page 8 EN 50171:2001 BSI 08-2001 4.1 Changeover mode In this case the essential safety equipment is supplied directly from the system (see Figure 1). Where the load voltage differs from the system voltage, an isolating transformer is used for supply matching. In the event of power failure, t
47、he voltage monitor in the automatic transfer-switching device (ATSD) switches over the supply to the battery. Controlled battery chargers provide charging and float charging of the battery. Figure 1 4.2 Mode without interruption In this case the charger supplies the essential safety equipment and th
48、e controlled charging and/or float charging of the battery (see Figure 2). Figure 2 In the event of a power failure, the battery connected in parallel takes over the power supply to the load without interruption.Page 9 EN 50171:2001 BSI 08-2001 4.3 Changeover mode with additional control switching d
49、evice for central switching of the load In addition to the devices detailed in 4.1, the equipment includes a control switch device(s) (CSD) which is automatically or manually activated and is dependent upon normal supply being available. This device ensures the emergency power supply is not isolated at any material time (see Figure 3). NOTE A number of control switch devices may by used to switch sections of the load. Figure 3 4.4 Changeover mode with additional control switching device for partial switc
