1、BRITISH STANDARD Central power supply systems The European Standard EN 50171:2001 has the status of a British Standard ICs 29.200; 91.160.10 BS EN 50171:2001 liaEws5- U- FiEs?% -=iZ3EE$ NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW - BS EN 50171:2001 Amd. No. ISBN O 580 3839
2、4 6 National foreword Date Comments This British Standard is the official English language version of EN 50171:2001, 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
3、: Code of practice for the emergency lighting of prcniises other than cinemas und certain oth,er specified premises used for entertainment; BS 5266-7: 1999. Emergency lighting - Part 7: Lighting opplications - Emergency lighting. Emergency lighting systems are normaliy used in conjunction with lumin
4、aires conforming to the following British Standard BS EN 60598-2-Yl: 1999, Luminaires - Part 2-22: Purticdur requirements - Luminaires for emergency lighting. The UK participation in its preparation was entrusted by Technical Committee CPU34, Lamps and related equipment, to Subcommittee CPW349, Emer
5、gency lighting, which has the responsibility to: - - 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 them in the UK. and European deve
6、lopments and promulgate A list of organizations represented on this subcoin inittee can be obtained 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 BST Standards Catalogue unde
7、r the section entitled “International Standards Correspondence Index”, or by using the “Find facility 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 app
8、lication. Compliance with a British Standard does not of itself confer immunity from legal obligations. This British Standard, having been prepared under the direction of the Elertiotechnical Sector policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy
9、 Committee on 23 August 2001 Summary of pages This document 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. 1! BSI 23 August 2001 EU
10、ROPEAN STANDARD EN 50171 NORME EUROPENNE EUROPISCHE NORM May 2001 ICs 29.240.00 Incorporating corrigendum August 2001 English version Central power supply systems Systmes dalimentation source centrale Zentrale Stromversorgungssysteme This European Standard was approved by CENELEC on 2000-08-01. CENE
11、LEC members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Upto-date lists and bibliographical references concerning such national standards may be obtained on app
12、lication 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 language and notified to the Central Secreta
13、riat 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, Spain, Sweden, Switzerland and United Ki
14、ngdom. 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 O 2001 CENELEC - All rights of exploitation in any form and by any means
15、reserved worldwide for CENELEC members. Ref. No. EN 50171:2001 E Page 2 EN 50171:2001 Foreword This European Standard was prepared by the CENELEC BlTF 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
16、European 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: . la
17、test date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement latest date by which the national standards conflicting with the EN have to be withdrawn (dop) 2001 -1 2-01 (dow) 2003-08-01 o BSI oa2001 Page 3 EN 50171:2001 Contents
18、 Page 1 Scope . 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 Information for installation and operation of central power supply systems 19 7 Annex A (informative) System testing O BSI 08-20
19、01 Page 4 EN 50171:2001 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 O00 V and that use batte
20、ries as the alternative 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 ins
21、tallations; - paging 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
22、clause 4. When a UPS 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 in
23、corporates by dated 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 E
24、uropean Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. . EN 1838 EN 50091-1-1 EN 50091-1-2 EN 50272-2 EN 60051 (series) EN 60146-1-1 EN 60285 EN 60417 (series) Lighting applications - Emergency lightin
25、g. Uninterruptible power systems (UPS) - Part 1-1: General and safety requirements for UPS used in operator access areas. Uninterruptible power systems (UPS) - Part 1-2: General and safety requirements for UPS used in restricted access locations. Safety requirements for secondary batteries and batte
26、ry installations - Part 2: Stationary batteries. Direct acting indicating analogue electrical measuring instruments and their accessories. Semiconductor convertors - General requirements and line commutated convertors - Part 1-1: Specifications of basic requirements. Alkaline secondary cells and bat
27、teries - Sealed nickel-cadmium cylindrical rechargeable single cells. Graphical symbols for use on equipment. o BSI oa2001 EN 60598-1 EN 60598-2-22 EN 60622 EN 60623 EN 60896-1 EN 60896-2 EN 60898 EN 60947-2 EN 60947-4-1 EN 61 032: 1998 EN 61558-2-6 HD 21 (series) HD 472 SI 3 Definitions Page 5 EN 5
28、0171:2001 Luminaires - Part 7; General requirements and tests. (IEC 60598-1, mod.) Luminaires - Part 2-22: Particular requirements - Luminaires for emergency lighting. (IEC 60598-2-22, mod .) Sealed nickel-cadmium prismatic rechargeable cells. Vented nickel-cadmium prismatic rechargeable single cell
29、s. Stationary lead-acid batteries - General requirements and methods of test - Part 1: Vented types. Stationary lead-acid batteries - General requirements and methods of test - Part 2: Valve regulated types. Circuit breakers for overcurrent protection for household and similar protection. (IEC 60898
30、, mod.) Low-voltage switchgear and controlgear - Part 2: Circuit-breakers. Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters. Protection of persons and equipment by enclosures - Probes for verification. Safety of power
31、transformers, power supply units and similar - Part 2-6: Particular requirements for safety isolating transformers for general use. Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V. Nominal voltages for low-voltage public electricity supply systems. (IEC 60238:1983
32、, mod.) For the purposes of this standard, the following definitions 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 norma
33、l supply to the battery 3.2 battery charger part of the equipment 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) O BSI 08-2001 Page 6 EN 50171:2001 3.4 changeover mode mode in which the emergenc
34、y power supply source is kept on standby where in cases of failure 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 e
35、mergency power supply source operates in parallel to the normal supply, 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 failur
36、e of the normal supply This device may be manually controlled as required 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 manufact
37、urer for the specified operating condition of the equipment 3.10 rated 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 tim
38、e during which the load can be supplied whilst the system stays within 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
39、cells 3.14 nominal system voltage declared output voltage of a centrally supplied emergency power system 3.15 minimum voltage voltage of the supply at the end of rated duration O BSI 08-2001 Page 7 EN 50171:2001 3.1 6 earth leakage indication device to indicate a leakage to earth from either pole of
40、 the battery or load circuit only when connected to the battery 3.1 7 mains failure indication device to indicate a failure of the normal supply 3.1 8 phase or final circuit failure detector device which monitors the normal supply to separate circuits or phases providing normal power supply and whic
41、h automatically initiates the emergency power supply on failure of the normal supply to any of the monitored circuits 3.19 central power supply system (CPSSystem) central power supply system which supplies the required emergency power to essential safety equipment without any restriction in power ou
42、tput 3.20 low power supply system (LPSSystem) central power supply system 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
43、 devices required by the relevant authority to protect people in the event 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 desc
44、ribes the basic types and their essential characteristics, In general two different modes of power supply are defined, .e. the changeover mode and the mode without interruption. In the changeover mode, the response time shall be no more than 0,5 s whilst in the mode without interruption the supply i
45、s permanent so, by its nature, there is no response time. The main difference is the response (changeover) 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
46、in the circuit. Where a DC supply is required a converter circuit is included. O BSI 08-2001 Page 8 EN 50171:2001 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
47、transformer is used for supply matching. In the event of power failure, the 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. 1 nvenen converter Battery output inp
48、ut Rectifier Figure 1 4.2 Mode without interruption In this case the charger supplies the essential safety equipment and the controlled charging and/or float charging of the battery (see Figure 2). inverter! conve der Battery ZAC or OC LAC -f charger - output input and power 1- 3 Figure 2 In the eve
49、nt of a power failure, the battery connected in parallel takes over the power supply to the load without interruption. O BSI 08-2001 Page 9 EN 501 71 :2001 4.3 the load Changeover mode with additional control switching device for central switching of 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
