prEN 50171:2019

Central safety power supply systems

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 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 may be suitable for energising 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 should be dedicated only to the essential safety equipment, and not for other typeof loads such as general purpose IT or industrial systems etc. Combinations of the aforementioned safety equipment types and / or non-safety equipment loads are permitted 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 should not cause the interruption in any other circuit used to supply 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

Centralni varnostni napajalni sistemi

Standards Content (sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Centralni varnostni napajalni sistemiZentrale SicherheitsstromversorgungssystemeSystèmes d'alimentation de sécurité à source centraleCentral safety power supply systems29.200QDSDMDQMHRectifiers. Convertors. Stabilized power supplyICS:Ta slovenski standard je istoveten z:prEN 50171:2019oSIST prEN 50171:2019en,fr,de01-april-2019oSIST prEN 50171:2019SLOVENSKI

STANDARD
oSIST prEN 50171:2019
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
DRAFT prEN 50171
February 2019 ICS 29.240
Will supersede
EN 50171:2001English Version
Central safety power supply systems
Systèmes d'alimentation à source centrale

Zentrale Sicherheitsstromversorgungssysteme This draft European Standard is submitted to CENELEC members for enquiry.

Deadline for CENELEC: 2019-04-26.
It has been drawn up by CLC/TC 22X.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CENELEC 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and shall not be referred to as a European Standard. 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 © 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Project: 67775

Ref. No. prEN 50171:2019 EoSIST prEN 50171:2019
prEN 50171:2019 (E) 2 Contents page 1

2 European foreword ............................................................................................................................................. 4 3 1 Scope ..................................................................................................................................................... 5 4 2 Normative references ............................................................................................................................. 5 5 3 Terms and definitions ............................................................................................................................. 7 6 4 Operating modes of central safety power supply systems ..................................................................... 9 7 4.1 General provisions ................................................................................................................................. 9 8 4.2 Changeover mode .................................................................................................................................. 9 9 4.3 Mode without interruption ....................................................................................................................... 9 10 4.4 Changeover mode with an additional control switching device for central switching of the 11 load ....................................................................................................................................................... 10 12 4.5 Changeover mode with additional control switching device for partial switching of the load ............... 10 13 4.6 Non-maintained changeover mode ...................................................................................................... 11 14 4.7 Mode without interruption with an additional control switching device for central switching of 15 the load ................................................................................................................................................. 11 16 5 Operating conditions and requirements ............................................................................................... 11 17 5.1 Normal operating conditions and requirements for central safety power supply systems ................... 11 18 5.2 Requirements to be specified by the user ............................................................................................ 12 19 6 Constructional design ........................................................................................................................... 12 20 6.1 Structure of enclosures ........................................................................................................................ 12 21 6.2 Battery chargers and rectifiers ............................................................................................................. 13 22 6.3 Transformers ........................................................................................................................................ 14 23 6.4 Switchgear and controlgear .................................................................................................................. 14 24 6.5 Central inverters/group inverters/converters ........................................................................................ 14 25 6.6 Deep discharge protection ................................................................................................................... 15 26 6.7 Monitoring and display equipment ....................................................................................................... 16 27 6.8 Fuses, protective devices and measuring instruments ........................................................................ 17 28 6.9 Internal wiring ....................................................................................................................................... 17 29 6.10 Electric strength .................................................................................................................................... 18 30 6.11 Test systems ........................................................................................................................................ 18 31 6.12 Batteries ............................................................................................................................................... 19 32 6.13 Equipment marking .............................................................................................................................. 20 33 6.14 Warning labels ...................................................................................................................................... 21 34 7 Required Information for safe installation and operation of central safety power supply 35 Systems ................................................................................................................................................ 22 36 7.1 Documentation ..................................................................................................................................... 22 37 7.2 Additional Information ........................................................................................................................... 22 38 7.3 Information on Recurring Test .............................................................................................................. 22 39 7.4 Battery installation and provisions for maintenance ............................................................................. 23 40 8 Tests ..................................................................................................................................................... 23 41 oSIST 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prEN 50171:2019 (E)

3 8.1 General ................................................................................................................................................. 23 42 8.2 Verification required before commissioning ......................................................................................... 24 43 Annex A (informative)

System testing ............................................................................................................. 26 44 Annex ZZ

(informative)

Relationship between this European Standard and the safety objectives of 45 Directive 2014/35/EU [2014 OJ L96] aimed to be covered .................................................................. 27 46 Bibliography ...................................................................................................................................................... 28 47

48 oSIST prEN 50171:2019

prEN 50171:2019 (E) 4 European foreword 49 This document (prEN 50171:2019) has been prepared by CLC/TC 22X “Power electronics”. 50 This document is currently submitted to the Enquiry. 51 The following dates are proposed: 52 • latest date by which the existence of this document has to be announced at national level (doa) dor + 6 months • latest date by which this document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) dor + 12 months • latest date by which the national standards conflicting with this document have to be withdrawn (dow) dor + 36 months (to be confirmed or modified when voting) This document will supersede EN 50171:2001. 53 This document has been prepared under a mandate given to CENELEC by the European Commission and 54 the European Free Trade Association, and supports essential requirements of EU Directive(s). 55 For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this 56 document. 57 oSIST prEN 50171:2019

prEN 50171:2019 (E)

5 1 Scope 58 This document specifies the general requirements for central power supply systems for an independent 59 energy supply to essential safety equipment. This standard covers systems that are permanently connected 60 to AC supply voltages not exceeding 1 000 V and use batteries as an alternative power source. 61 Central safety power supply systems are intended to ensure energy supply to emergency escape lighting in 62 the event of normal supply failure and may be suitable for energizing other essential safety equipment, for 63 example: 64 – electric circuits of automatic fire extinguishing installations; 65 – paging systems and signalling safety installations; 66 – smoke extraction equipment; 67 – carbon monoxide warning systems; 68 – special safety installations related to specific buildings, e.g. high-risk areas. 69 The power supply of CPS systems should be dedicated only to the essential safety equipment, and not for 70 other type of loads such as general purpose IT or industrial systems etc. 71 Combinations of the aforementioned safety equipment types are permitted together on the same central 72 safety power supply system providing the availability for safety equipment loads is not impaired. A fault 73 occurring in a circuit should not cause the interruption in any other circuit used to supply essential safety 74 equipment. 75 Schematic representations of typical central safety power supply equipment are depicted in Clause 4. 76 Power supply systems for fire alarm equipment that are covered by EN 54 (series) are excluded. 77 2 Normative references 78 The following documents are referred to in the text in such a way that some or all of their content constitutes 79 requirements of this document. For dated references, only the edition cited applies. For undated references, 80 the latest edition of the referenced document (including any amendments) applies. 81 EN 1838, Lighting applications - Emergency lighting 82 EN 50272-2:2001, Safety requirements for secondary batteries and battery installations - Part 2: Stationary 83 batteries 84 EN 50274, Low-voltage switchgear and controlgear assemblies - Protection against electric shock - 85 Protection against unintentional direct contact with hazardous live parts 86 EN 50525-2-31, Electric cables - Low voltage energy cables of rated voltages up to and including 450/750 V 87 (U0/U) - Part 2-31: Cables for general applications - Single core non-sheathed cables with thermoplastic 88 PVC insulation 89 EN 60038:2011, CENELEC standard voltages 90 EN 60051 (series), Direct acting indicating analogue electrical measuring instruments and their accessories 91 (IEC 60051, series) 92 EN 60146-1-1, Semiconductor converters - General requirements and line commutated converters - Part 1-1: 93 Specification of basic requirements 94 HD 60364-6:2007, Low voltage electrical installations - Part 6: Verification 95 oSIST prEN 50171:2019

prEN 50171:2019 (E) 6 HD 60364-5-557, Low-voltage electrical installations - Part 5-557: Selection and erection of electrical 96 equipment - Auxiliary circuits 97 EN 60445, Basic and safety principles for man-machine interface, marking and identification - Identification 98 of equipment terminals, conductor terminations and conductors (IEC 60445) 99 EN 60598-1:2015, Luminaires - Part 1: General requirements and tests (IEC 60598-1:2014) 100 EN 60622, Secondary cells and batteries containing alkaline or other non-acid electrolytes - Sealed nickel-101 cadmium prismatic rechargeable single cells 102 EN 60623, Secondary cells and batteries containing alkaline or other non-acid electrolytes - Vented nickel-103 cadmium prismatic rechargeable single cells (IEC 60623) 104 EN 60721-3-3, Classification of environmental conditions - Part 3: Classification of groups of environmental 105 parameters and their severities - Section 3: Stationary use at weatherprotected locations 106 EN 60896-11, Stationary lead-acid batteries - Part 11: Vented types - General requirements and methods of 107 tests 108 EN 60896-21:2004, Stationary lead-acid batteries - Part 21: Valve regulated types - Methods of test 109 EN 60896-22, Stationary lead-acid batteries - Part 22: Valve regulated types - Requirements 110 EN 60947-2, Low-voltage switchgear and controlgear - Part 2: Circuit-breakers (IEC 60947-2) 111 EN 60947-3, Low-voltage switchgear and controlgear - Part 3: Switches, disconnectors, switch-112 disconnectors and fuse-combination units 113 EN 60947-4-1, Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - 114 Electromechanical contactors and motor-starters 115 EN 61000-6-2, Electromagnetic compatibility (EMC) - Part 6-2: Generic standards - Immunity for industrial 116 environments 117 EN 61000-6-3, Electromagnetic compatibility (EMC) - Part 6-3: Generic standards - Emission standard for 118 residential, commercial and light-industrial environments 119 EN 61000-6-4, Electromagnetic compatibility (EMC) - Part 6-4: Generic standards - Emission standard for 120 industrial environments 121 EN 61032:1998, Protection of persons and equipment by enclosures - Probes for verification 122 EN 61558-2-4, Safety of transformers, reactors, power supply units and similar products for supply voltages 123 up to 1 100 V - Part 2-4: Particular requirements and tests for isolating transformers and power supply units 124 incorporating isolating transformers 125 EN 61558-2-6, Safety of transformers, reactors, power supply units and similar products for supply voltages 126 up to 1 100 V - Part 2-6: Particular requirements and tests for safety isolating transformers and power supply 127 units incorporating safety isolating transformers 128 EN 61558-2-16, Safety of transformers, reactors, power supply units and similar products for supply voltages 129 up to 1 100 V - Part 2-16: Particular requirements and tests for switch mode power supply units and 130 transformers for switch mode power supply units 131 EN 61951-1, Secondary cells and batteries containing alkaline or other non-acid electrolytes - Portable 132 sealed rechargeable single cells – Part 1: Nickel-cadmium (IEC 61951-1) 133 EN 62034:2012, Automatic test systems for battery powered emergency escape lighting 134 oSIST prEN 50171:2019

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7 EN 62040-1, Uninterruptible power systems (UPS) - Part 1: General and safety requirements for UPS 135 (IEC 62040-1) 136 EN 62310-1, Static transfer systems (STS) - Part 1: General and safety requirements 137 EN 82079-1, Preparation of instructions for use - Structuring, content and presentation - Part 1: General 138 principles and detailed requirements 139 3 Terms and definitions 140 For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain 141 terminological databases for use in standardization at the following addresses:

142 • IbC blectropedia: available at http://www.electropedia.org/

143 • Ipl lnline browsing platform: available at http://www.iso.org/obp 144 3.1 145 automatic transfer switching device (ATSD) 146 device arranged to connect the emergency supply automatically to the essential safety equipment circuit(s) 147 on failure of the normal supply or to transfer the load from the normal supply to the battery 148 3.2 149 battery charger 150 part of the equipment that provides the charge to the battery from the normal supply 151 3.3 152 inverter 153 device for the conversion of direct current (DC) to alternating current (AC) 154 3.4 155 changeover mode 156 mode in which the emergency power supply source is kept on standby and will, in the event of a failure of the 157 normal supply, automatically be transferred to the essential safety equipment 158 3.5 159 converter 160 device for changing the voltage of a direct current supply 161 3.6 162 mode without interruption 163 mode in which the emergency power supply source operates in parallel to the normal supply, is connected to 164 the load and supplies power without interruption when the normal supply fails 165 3.7 166 control switch device (CSD) 167 device intended to automatically supply one or several circuits from the emergency power source on failure 168 of the normal supply. This device may be manually controlled as required by the application standard 169 Note 1 to entry: A CSD can be located inside or outside of the CPS 170 3.8 171 deep discharge protection device 172 device to protect the battery against deep discharge 173 3.9 174 rated supply voltage (mains input) 175 supply voltage or supply voltages assigned to the equipment by the manufacturer for the specified operating 176 conditions of the equipment 177 oSIST prEN 50171:2019

prEN 50171:2019 (E) 8 3.10 178 rated output current (of a system) 179 current, in amperes, supplied by a system at nominal voltage 180 3.11 181 normal supply 182 source of electrical energy that is intended to provide normal power supply 183 3.12 184 rated operating time 185 design period of time during which the load can be supplied whilst the system stays within specified voltage 186 limits during mains failure 187 3.13 188 nominal battery voltage 189 suitable approximate voltage value of a system calculated using 2 V per cell for lead acid cells and 1,2 V per 190 cell for nickel cadmium cells 191 3.14 192 nominal system voltage 193 specified output voltage of a central safety power supply system 194 3.15 195 minimum voltage 196 voltage of the central safety power supply system at the end of the rated operating time 197 3.16 198 earth fault indication 199 device to indicate earth faults from either pole of the battery or from a load circuit if connected to the battery 200 3.17 201 mains failure indication 202 device to indicate failure of the normal supply 203 3.18 204 central safety power supply system (CPS system) 205 central power supply system which supplies the required power to essential safety equipment without any 206 restriction in power output 207 3.19 208 low power safety supply system (LPS system) 209 central power supply system where the power output is limited to 500 W for a duration of 3 h or to 1 500 W 210 for a duration of 1 h 211 3.20 212 essential safety equipment 213 devices required by the relevant authority to protect people in the event of a hazard 214 3.21 215 central inverter 216 inverter which supplies the total number of essential safety equipment circuit(s) 217 3.22 218 group inverter 219 inverter which supplies a part of the essential safety equipment installation, where the load connected to the 220 inverter is limited to a single 221 oSIST prEN 50171:2019

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9 3.23 222 expert for safety power supply systems 223 electrically skilled person with the relevant education to enable him or her, to install and to test a safety 224 power supply system and to ensure the functional capability of it, by consideration of the relevant standards, 225 building codes and manufacturer documentation 226 4 Operating modes of central safety power supply systems 227 4.1 General provisions 228 In order to comply with the different operating requirements of the essential safety equipment, various types 229 of central safety power supply systems are necessary. 230 This clause describes the basic modes of operation of central safety power supply systems and their 231 essential characteristics. 232 In general, two different modes of power supply are defined, the changeover mode and the mode without 233 interruption. The main difference is the response (changeover) time. In changeover mode, the response time 234 shall be no more than 0,5 s whereas, in the mode without interruption, the supply is permanent so, naturally, 235 there is no response time. 236 The load, the level of discharge and the capacity of the battery determine the rated operating time in the 237 case of a power failure. For application cases where the load requires an AC supply, an inverter shall be 238 used. For application cases where a DC supply is required, a direct current adjusted to the load shall be 239 supplied. 240 4.2 Changeover mode 241 In the changeover mode, the essential safety equipment shall be fed directly by normal supply (see 242 Figure 1). When the load voltage differs from the normal supply voltage, an isolating transformer shall be 243 used for supply matching. In the event of a mains power failure, the voltage monitor in the automatic transfer 244 switching device (ATSD) shall transfer the supply to the battery. A controlled battery charger shall be 245 provided for charging and float charging of the battery. 246

247 Figure 1 248 4.3 Mode without interruption 249 When in the mode without interruption, the battery charger shall be able to energize the essential safety 250 equipment and to ensure the charging and/or float charging of the battery (see Figure 2 and Figure 3). 251 oSIST prEN 50171:2019

prEN 50171:2019 (E) 10
252 Figure 2 253

254 Figure 3 255 In the event of mains failure the battery shall take over the power supply to load without interruption, and the 256 battery shall be adequately rated to maintain the output voltage within limits compatible with the safety 257 equipment connected to the load. 258 4.4 Changeover mode with an additional control switching device for central switching of 259 the load 260 In addition to the devices detailed in 4.2, the equipment includes a control switch device(s) (CSD) which is 261 (are) activated automatically or manually and is (are) dependent upon normal supply being available. For 262 this, it shall be ensured that the emergency power supply is effective throughout the time required for 263 operation. (See Figure 4.) 264 A number of control switch devices may be used to switch sections of the load. 265

266 Figure 4 267 4.5 Changeover mode with additional control switching device for partial switching of the 268 load 269 In addition to the devices detailed in 4.2, the equipment includes a control switching device for the section-270 wise switching of the loads which is activated by the normal supply (see 4.4). 271 However, deviating from the design specified in 4.4, part of the load is energised continuously (see Figure 5). 272 oSIST prEN 50171:2019

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273 Figure 5 274 4.6 Non-maintained changeover mode 275 In this case, the essential safety equipment is energised only in the event of normal supply failure. Differing 276 from the system defined in 4.3, a control switch device or several control switch devices is (are) used 277 additionally (see Figure 6) 278

279 Figure 6 280 4.7 Mode without interruption with an additional control switching device for central 281 switching of the load 282 In addition to the devices detailed in 4.3 the equipment includes a control switch device(s) (CSD) which is 283 manually activated or by the normal supply, in order to divide the loads on one part continuously energized 284 and a another part which can be disconnected. 285

286 Figure 7 287 5 Operating conditions and requirements 288 5.1 Normal operating conditions and requirements for central safety power supply 289 systems 290 Systems shall be suitable for use under at least the following conditions. Deviations from these conditions 291 shall be agreed on between user and manufacturer. 292 a) The system shall be designed for a rated supply voltage as specified in Table 1 of EN 60038:2011 and 293 for a maximum static voltage deviation of ± 10 %. 294 b) The system shall be designed for a maximum frequency deviation of the supply voltage of ± 4 %. 295 oSIST prEN 50171:2019

prEN 50171:2019 (E) 12 c) The temperature range in which the system can be operated shall be declared and the equipment shall 296 be capable of operating without condensation in a relative humidity of 85 %. 297 NOTE 1 Working life and attainable capacity of the batteries are strongly dependent upon battery temperature. 298 d) The system shall be capable of operating without a reduction of efficiency at altitudes of up to 1 000 m 299 above sea level. 300 NOTE 2

For altitudes above 1 000 m the supplier has to provide on request derating factors 301 e) The battery shall be protected against deep discharge. 302 f) With regard to immunity to electromagnetic disturbance, the system shall comply with requirements for 303 the industry areas as specified in EN 61000-6-2, and for emitted electromagnetic interferences it shall 304 comply with the requirements for residential, business and commercial areas as well as small 305 enterprises as specified in EN 61000-6-3 or where the essential safety equipment is intended for 306 installation within an industrial environment, with the requirements as specified in EN 61000-6-4. 307 5.2 Requirements to be specified by the user 308 At least the following information shall be supplied to the manufacturer: 309 a) type and value of the rated supply voltage (mains input) and output voltage; 310 b) load profile over the rated operating time; 311 c) division of the load (continuous and stand-by operation), as far as required; 312 d) permissible changeover time in case of failure of the mains supply; 313 e) the rated operating time required; 314 f) type and intended position of the battery; 315 g) intended system configuration (type of system in accordance with Clause 4); 316 h) ambient temperature range and relative humidity if different from Class 3K3 (moderate climate) as 317 specified in EN 60721-3-3. 318 Additional load specific delay times may have to be taken into account at the design stage. 319 NOTE For standard CPS/LPS from the suppliers catalogue, these information can be predefined by the supplier, so 320 that the user can choose the suitable system for his needs. 321 6 Constructional design 322 6.1 Structure of enclosures 323 6.1.1 Enclosures shall have sufficient mechanical strength. 324 Compliance is checked by inspection and the following test: 325 A straight and un-jointed test finger is used with the same dimensions as the standard test finger specified in 326 EN 61032:1998, Figure 7, Test probe 11. The finger is pressed against the surface with a force of 30 N. 327 During the test, metal parts shall not touch live parts. After the test, covers shall not be excessively deformed 328 and the enclosure shall continue to meet the requirements of EN 60598-1:2014, Clause 11. 329 6.1.2 Enclosures of the system shall have a degree of protection of at least IP 20. 330 6.1.3 Enclosures shall be resistant to heat and fire. 331 oSIST prEN 50171:2019

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13 Plastic enclosures shall comply with the regulation EN 60598-1:2014, Clause 13 and withstand the test 332 (glow-wire test) specified in EN 60598-1:2014, 13.3.2, however at a test temperature of 850 °C. 333 NOTE Metal enclosures are deemed to comply with this requirement. 334 6.1.4 Doors and detachable covers shall be fastened so that access to dangerous live parts is not possible 335 without the use of a tool or key. 336 6.1.5 Devices within the enclosure shall be arranged so as to allow for maintenance and functional tests. 337 6.1.6 The wiring between component parts and equipment components shall be permanently marked. 338 6.1.7 According to EN 60598-1:2014, 5.3.2, wireways shall be smooth and free from sharp edges, burrs, 339 flashes, etc., in order to prevent damage to the insulation of the wiring parts. Metal screws shall not protrude 340 into wireways. 341 6.1.8 Enclosures housing batteries shall comply with the requirements of EN 50272-2. 342 Compliance with the requirements of 6.1.4 to 6.1.8 is checked by i

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