1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationGeneral requirements for Homeand Building Electronic Systems(HBES)and Building Automationand Control Systems (BACS)Part 3: Electrical safety requirementsBS EN 50491-3:2009Nationa
2、l forewordThis British Standard is the UK implementation of EN 50491-3:2009. Togetherwith BS EN 50491-5-1:2010, BS EN 50491-5-2:2010 and BS EN 50491-5-3:2010, it partially supersedes BS EN 50090-2-2:1996+A2:2007.The UK participation in its preparation was entrusted to Technical CommitteeIST/6, Data
3、communications.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2010ISBN 978 0 580 64027 8ICS 97.120Complianc
4、e with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 July 2010.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 50491-3:2009EUROPEAN STANDA
5、RD EN 50491-3 NORME EUROPENNE EUROPISCHE NORM July 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: Avenue Marnix 17, B - 1000 Brussels 2009 CENELEC - All rights
6、of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50491-3:2009 E ICS 97.120 Supersedes EN 50090-2-2:1996 + A1:2002 + A2:2007 (partially)English version General requirements for Home and Building Electronic Systems (HBES) and Building Automation and Cont
7、rol Systems (BACS) - Part 3: Electrical safety requirements Exigences gnrales relatives aux systmes lectroniques pour les foyers domestiques et les btiments (HBES) et aux Systmes de Gestion Technique du Btiment (SGTB) - Partie 3: Exigences de scurit lectriqueAllgemeine Anforderungen an die Elektrisc
8、he Systemtechnik fr Heim und Gebude (ESHG) und an Systeme der Gebudeautomation (GA) - Teil 3: Anforderungen an die elektrische Sicherheit This European Standard was approved by CENELEC on 2009-03-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the co
9、nditions 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 Central Secretariat or to any CENELEC member. This European Standard exists in
10、 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 Secretariat has the same status as the official versions. CENELEC members are the national electrotec
11、hnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland
12、and the United Kingdom. EN 50491-3:2009 2 Foreword This European Standard was prepared by a joint working group of Technical Committee CENELEC TC 205, Home and Building Electronic Systems (HBES), and Technical Committee CEN TC 247, Building Automation, Controls and Building Management. The text of t
13、he draft was submitted to the formal vote and was approved by CENELEC as EN 50491-3 on 2009-03-01. This European Standard partially supersedes EN 50090-2-2:1996 + corrigendum March 1997 + A1:2002 + A2:2007. The following dates were fixed: latest date by which the EN has to be implemented at national
14、 level by publication of an identical national standard or by endorsement (dop) 2010-03-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2012-03-01 _ BS EN 50491-3:2009 3 EN 50491-3:2009 Contents Introduction. 4 1 Scope . 5 2 Normative references . 5
15、3 Definitions and abbreviations 6 3.1 Definitions . 6 3.2 Abbreviations 8 4 Classification of HBES/BACS network interfaces 9 4.1 Telecommunication network 9 4.2 Dedicated network . 9 5 Safety requirements and compliance criteria 9 5.1 General . 9 5.2 Classification requirements of installation areas
16、 9 5.3 Electrical safety requirements . 9 5.4 Installation 15 Annex A (normative) Special national conditions 16 Bibliography 17 Tables Table 1 - List of standards for electrical safety (informative) . 10 Table 2 - Requirements for connection of devices to a dedicated HBES/BACS network 11 BS EN 5049
17、1-3:2009EN 50491-3:2009 4 Introduction This European Standard shall be used for products connected to a home and building automation and control system (HBES/BACS). The expression HBES/BACS covers any combination of HBES and/or BACS products including their separate connected/detachable devices link
18、ed together via one or more networks. This European Standard shall be used in conjunction with relevant product safety standards. Introductory note The joint working group CLC/TC 205 CEN/TC 247 has decided to include this introductory note for a better understanding of the document. The background f
19、or this European Standard is based on the philosophy that a device considered electrically safe according to an appropriate product safety standard harmonised under the LVD Directive also should remain safe when connected to a network. This European Standard specifies in addition to the specific pro
20、duct standard the electrical safety requirements necessary when a HBES/BACS device connected to a network shall remain safe under normal and single fault condition of the HBES/BACS network and in the same time under normal and single fault condition of one or more HBES/BACS devices connected to the
21、HBES/BACS network. This includes protection from over voltages on the network, protection from hazards caused by connection of different type of circuits, the limitation of the touch current to a network and protection of the communication wiring from overheating. The HBES/BACS network is any interc
22、onnection between HBES/BACS products. The HBES/BACS networks can be either a telecommunication network with interfaces classified according to IEC/TR 62102 or a dedicated network classified as a Mains, ELV, FELV, SELV or PELV circuit. For HBES/BACS products connected to a telecommunication network t
23、he requirements in EN 41003 apply. For HBES/BACS products connected to a dedicated HBES/BACS network the requirements for the electrical separation between the device and the network circuit are specified (see Table 2). These specifications of the electrical separations follow the principle in the b
24、asic safety publications EN 60664-1 and EN 61140 together with the installation requirements of HD 60364-4-41. The following compromises are used: Impulse overvoltages considerations: According to the principles of EN 60664-1 the rated impulse voltage for the separation shall be the highest of eithe
25、r the impulse voltage on the network or the rated impulse voltage of the device circuit to be connected to the network. The overvoltages categories considered by EN 60664-1 refer to overvoltages derived directly from the mains through the power supply The overvoltages coming from other sources (eg.
26、capacitive couplings) are not specified in EN 60664-1. EN 60664-1 recommends that technical committees specify overvoltage categories or rated impulse voltages as appropriate. For the purpose of this standard, the following impulse voltages have been specified: For networks galvanic electrical separ
27、ated from mains (FELV, SELV or PELV circuit) the impulse overvoltage coming from the network side of the separation has been limited to 2,5 kV for fixed installed networks and 1,5 kV for detachable networks. For telecommunication networks, particular requirements apply (see 5.3.2.1). BS EN 50491-3:2
28、009 5 EN 50491-3:2009 1 Scope This European Standard provides the electrical safety requirements for all devices connected to HBES/BACS. This European Standard is applicable to operator stations and other human system interface devices, devices for management functions, control devices, automation s
29、tations and application specific controllers, field devices, cabling and interconnection of devices. This European Standard covers the following requirements and compliance criteria: protection from hazards in the device; protection from overvoltages on the network; protection from touch current; pr
30、otection from hazards caused by different type of circuits; protection of the communication wiring from overheating caused by excessive current. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition ci
31、ted applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 41003 Particular safety requirements for equipment to be connected to telecommunication networks and/or a cable distribution system EN 60664-1:2007 Insulation coordination for eq
32、uipment within low-voltage systems - Part 1: Principles, requirements and tests (IEC 60664-1:2007) EN 60950-1:2006 Information technology equipment - Safety - Part 1: General requirements(IEC 60950-1:2005, mod) EN 60990 Methods of measurement of touch current and protective conductor current(IEC 609
33、90) EN 61140:2002 Protection against electric shock - Common aspects for installation and equipment (IEC 61140:2001) EN 61180-1 High-voltage test techniques for low-voltage equipment - Part 1: Definitions, test and procedure requirements (IEC 61180-1) EN 61180-2 High-voltage test techniques for low-
34、voltage equipment - Part 2: Test equipment (IEC 61180-2) CLC/TR 62102 Electrical safety - Classification of interfaces for equipment to be connected to information and communications technology networks (IEC/TR 62102) HD 60364-4-41:2007 Low-voltage electrical installations - Part 4-41: Protection fo
35、r safety - Protection against electric shock (IEC 60364-4-41:2005, mod.) BS EN 50491-3:2009EN 50491-3:2009 6 HD 384.5.523 S2:2001 Electrical installations of buildings - Part 5: Selection and erection of electrical equipment - Section 523: Current-carrying capacities in wiring systems (IEC 60364-5-5
36、23:1999, mod.) IEC 60050-195 International Electrotechnical Vocabulary - Part 195: Earthing and protection against electric shock IEC 60050-826 International Electrotechnical Vocabulary - Part 826: Electrical installationsIEC 62151:2000 Safety of equipment electrically connected to a telecommunicati
37、on network 3 Definitions and abbreviations 3.1 Definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 Home and Building Automation and Control (HBES/BACS) products HBES/BACS products are devices intended to be used for control, monitoring, operation or manage
38、ment of building services and/or home electronic systems which can interact via a communication network 3.1.2 HBES/BACS network any interconnection between HBES/BACS products used for communication An HBES/BACS network can carry digital data as well as analogue signals 3.1.3 HBES/BACS system the exp
39、ression HBES/BACS covers any combination of HBES/BACS products (including their separate connected/detachable devices) linked together via one or more HBES/BACS networks. Other names used such as “home control network“, “home control systems“, “home and building electronic systems“, “building system
40、s“, “building automation system“ etc. describes types of HBES/BACS system 3.1.4 telecommunication network metallically terminated transmission medium intended for communication between equipments that may be located in separate buildings, excluding the mains systems for supply, transmission and dist
41、ribution of electrical power, if used as a telecommunication transmission medium, cable distribution systems, SELV circuits connecting units of information technology equipment NOTE 1 The term TELECOMMUNICATION NETWORK is defined in terms of its functionality, not its electrical characteristics. A t
42、elecommunication network is not itself defined as being either a SELV circuit or a TNV circuit. Only the circuits in the equipment are so classified. NOTE 2 A TELECOMMUNICATION NETWORK may be - publicly or privately owned, - subject to transient overvoltages due to atmospheric discharges and faults
43、in power distribution systems, - subject to longitudinal (common mode) voltages induced from nearby power lines or electric traction lines. NOTE 3 Examples of TELECOMMUNICATION NETWORKS are - a public switched telephone network, - a public data network, - an Integrated Services Digital Network (ISDN
44、), - a private network with electrical interface characteristics similar to the above. EN 60950-1 BS EN 50491-3:2009 7 EN 50491-3:2009 3.1.5 electric shock physiological effect resulting from an electric current through a human or animal body IEV 195-01-04 3.1.6 basic protection protection against e
45、lectric shock under fault-free conditions IEV 195-06-01 3.1.7 fault protection protection against electric shock under single-fault conditions IEV 195-06-02 3.1.8 mains nominal voltage up to 230/400 V a.c. for a three-phase system or 230 V a.c. for a single-phase system, or voltage up to 400 V d.c.
46、3.1.9 mains circuit electrical circuit in which the nominal voltage cannot exceed mains voltage under normal conditions 3.1.10 Extra Low Voltage (ELV) nominal voltage in the electrical installation of buildings according to the voltage band I specified in IEC 60449 NOTE Voltage band I according to I
47、EC 60449 is a voltage below or equal to 50 V a.c. or 120 V d.c. 3.1.11 Extra Low Voltage (ELV) circuit electrical circuit in which the nominal voltage cannot exceed ELV under normal conditions NOTE An ELV circuit is not safe to touch. 3.1.12 Functional Extra Low Voltage (FELV) circuit electrical cir
48、cuit in which the nominal voltage cannot exceed ELV under normal conditions NOTE 1 FELV has simple separation from LV. NOTE 2 A FELV circuit is not safe to touch and may be connected to protective earth. 3.1.13 Safety Extra Low Voltage (SELV) circuit electrical circuit in which the nominal voltage c
49、annot exceed ELV under normal conditions, under single fault conditions, including earth fault in other circuits NOTE 1 SELV has simple separation from PELV, other SELV systems and earth and protective separation from all other circuits. NOTE 2 Under normal conditions and single fault conditions in dry location inside a building a SELV circuit with a voltage not higher than 25 V a.c. or 60 V d.c. is safe to touch. BS EN 50491-3:2009EN 50491-3:2009 8
