1、BSI Standards PublicationBS EN 50156-2:2015Electrical equipment forfurnaces and ancillaryequipmentPart 2: Requirements for design,development and type approval of safetydevices and subsystemsBS EN 50156-2:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 5015
2、6-2:2015.The UK participation in its preparation was entrusted to TechnicalCommittee PEL/27, Electroheating.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users a
3、re responsible for its correctapplication. The British Standards Institution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 80042 9ICS 27.060.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theSt
4、andards Policy and Strategy Committee on 31 July 2015.Amendments issued since publicationDate Text affectedBS EN 50156-2:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50156-2 July 2015 ICS 27.060.01 English Version Electrical equipment for furnaces and ancillary equipment - Part 2: Requir
5、ements for design, development and type approval of safety devices and subsystems Equipements lectriques dinstallation de chaudire - Partie 2: Rgles pour la dessin, dveloppement et essai de type d lment scurit et sous-systme Elektrische Ausrstung von Feuerungsanlagen - Teil 2: Bestimmungen fr den En
6、twurf, die Entwicklung und die Baumusterprfung von Sicherheitsbauteilen und Teilsystemen This European Standard was approved by CENELEC on 2015-01-26. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the st
7、atus 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 CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, Fren
8、ch, 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,
9、 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, Slovakia, Slovenia, Spain, S
10、weden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CENELEC All rights of expl
11、oitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 50156-2:2015 E BS EN 50156-2:2015EN 50156-2:2015 (E) 2 Contents Page European foreword . 3 Introduction . 4 1 Scope 5 2 Normative references 5 3 Terms and definitions . 6 4 Requirements for safety devices and s
12、ubsystems of safety-related systems . 6 4.1 General . 6 4.2 Requirements for safety devices and subsystems in electrical/electronic/ programmable electronic systems 7 4.2.1 General . 7 4.2.2 Type approval in accordance with product standards 7 4.2.3 Type approval following the requirements of EN 615
13、08 . 7 4.3 Requirements for safety devices and subsystems of other technologies 8 4.3.1 General . 8 4.3.2 Type approval by product standards 8 4.3.3 Type approval by fault assessment . 8 4.3.4 Quality assurance 9 4.3.5 Quantification 9 4.3.6 Recurring functional testing 9 4.3.7 Operating instruction
14、s 10 Annex A (normative) Proven in use for subsystems and devices of other technologies .11 Annex B (informative) Aspects with influence on functional safety 13 Annex C (informative) Summary of the characteristic data for use of a subsystem or device in safety-related systems .14 C.1 Classification
15、of the product 14 C.2 Characteristic data according to EN 61508, Parts 1 to 7:14 C.2.1 Data for use of the product as a subsystem or device in safety functions .14 C.2.2 Additional data for use of the product as a component in safety functions .14 Bibliography 16 BS EN 50156-2:2015EN 50156-2:2015 (E
16、) 3 European foreword This document (EN 50156-2:2015) has been prepared by CLC/BTTF 132-2 “Revision of EN 50156 Electrical equipment for furnaces and ancillary equipment”. The following dates are fixed: latest date by which this document has to be implemented at national level by publication of an i
17、dentical national standard or by endorsement (dop) 2016-01-26 latest date by which the national standards conflicting with this document have to be withdrawn (dow) 2018-01-26 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC
18、 and/or CEN shall not be held responsible for identifying any or all such patent rights. This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC). This European Standard is the second part of a ser
19、ies of European Standards that specify the requirements for equipment of safety functions for furnaces, especially safety related systems to protect personnel, the furnace with ancillary equipment against hazards related to heat generation, the heated system and to operate reliably during normal con
20、ditions, and abnormal conditions that can be foreseen. EN 50156, Electrical equipment for furnaces and ancillary equipment, consists of the following parts: Part 1: Requirements for application design and installation; Part 2: Requirements for design, development and type approval of safety devices
21、and subsystems; Part 3: Requirements for plant-specific tests of safety-related equipment 1). This European Standard is based on EN 61508:2010, Functional safety Safety-related systems, Parts 1 to 7 as a basic safety standard. 1) In preparation. BS EN 50156-2:2015EN 50156-2:2015 (E) 4 Introduction T
22、his part of EN 50156 sets out the requirements and recommendations for design, development and type approval of safety devices and subsystems to be applied to protect personnel, property and environment against the hazards of furnaces with ancillary equipment and the systems heated by the thermal en
23、ergy released in the furnace. The operating conditions of the furnace, the hazards of combustion and the safety of the heated system are considered. The safety requirements for all stages of the life-cycle of a particular plant, proof of fulfilment of the plant-specific safety-requirements, are defi
24、ned in Part 1 of EN 50156. The requirements for plant specific tests during implementation, operation and maintenance are defined in Part 3 of EN 50156. The requirements for the application of safety-related systems are specified in EN 50156-1:2015, Clause 10. The rating of necessary safety integrit
25、y levels, as specified in EN 50156-1:2015, 10.4, is based on EN 61508-1. For the plant-specific implementation of safety-related systems, it is necessary to organize management of functional safety and to satisfy safety life-cycle requirements. BS EN 50156-2:2015EN 50156-2:2015 (E) 5 1 Scope This pa
26、rt of EN 50156 applies to the requirements for design, development and approval of safety-relevant equipment for the safety related system for furnaces that are operated with solid, liquid or gaseous fuels and their ancillary equipment. This part of EN 50156 specifies the requirements for safety-rel
27、ated equipment that is necessary to meet the safety conditions of furnaces, to reduce the hazards of combustion and to protect the heated systems from damage e.g. by overheating. Subsystems and devices of other technologies, which are part of the safety-related system (see EN 50156-1:2015, 3.38), ar
28、e covered by this part of EN 50156. This part of EN 50156 sets out special requirements for design, development and approval of safety devices and subsystems to satisfy the requirements of EN 50156-1:2015, Clause 10 “Additional requirements for the application of a safety-related system”. 2 Normativ
29、e references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) app
30、lies. EN 161:2011+A3:2013, Automatic shut-off valves for gas burners and gas appliances EN 267:2009+A1:2011, Automatic forced draught burners for liquid fuels EN 298:2012, Automatic burner control systems for burners and appliances burning gaseous or liquid fuels EN 676:2003+A2:2008, Automatic force
31、d draught burners for gaseous fuels EN 1643:2014, Safety and control devices for gas burners and gas burning appliances - Valve proving systems for automatic shut-off valves EN 1854:2010, Pressure sensing devices for gas burners and gas burning appliances EN 12067-2:2004, Gas/air ratio controls for
32、gas burners and gas burning appliances - Part 2: Electronic types EN 12952-11:2007, Water-tube boilers and auxiliary installations - Part 11: Requirements for limiting devices of the boiler and accessories EN 12953-9:2007, Shell boilers - Part 9: Requirements for limiting devices of the boiler and a
33、ccessories EN 13611:2007+A2:2011, Safety and control devices for gas burners and gas burning appliances - General requirements EN 16340:2014, Safety and control devices for burners and appliances burning gaseous or liquid fuels - Combustion product sensing devices EN 50156-1:2015, Electrical equipme
34、nt for furnaces and ancillary equipment Part 1: Requirements for application design and installation EN 60730-1:2011, Automatic electrical controls for household and similar use - Part 1: General requirements (IEC 60730-1:2010) BS EN 50156-2:2015EN 50156-2:2015 (E) 6 EN 60812:2006, Analysis techniqu
35、es for system reliability - Procedure for failure mode and effects analysis (FMEA) (IEC 60812:2006) EN 60947-2:2006, Low-voltage switchgear and controlgear - Part 2: Circuit-breakers (IEC 60947-2:2006) EN 61010-1:2010, Safety requirements for electrical equipment for measurement, control, and labora
36、tory use - Part 1: General requirements (IEC 61010-1:2010+corr 2011) EN 61131-2:2007, Programmable controllers - Part 2: Equipment requirements and tests (IEC 61131-2:2007) EN 61508-1:2010, Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 1: General re
37、quirements (IEC 61508-1:2010) EN 61508-2:2010, Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 2: Requirements for electrical/electronic/programmable electronic safety-related systems (IEC 61508-2:2010) EN 61508-3:2010, Functional safety of electrical
38、/electronic/programmable electronic safety-related systems - Part 3: Software requirements (IEC 61508-3:2010) EN 61508-4:2010, Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 4: Definitions and abbreviations (IEC 61508-4:2010) EN 61508-5:2010, Functio
39、nal safety of electrical/electronic/programmable electronic safety-related systems - Part 5: Examples of methods for the determination of safety integrity levels (IEC 61508-5:2010) EN 61508-6:2010, Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 6: Gu
40、idelines on the application of IEC 61508-2 and IEC 61508-3 (IEC 61508-6:2010) EN 61508-7:2010, Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 7: Overview of techniques and measures (IEC 61508-7:2010) EN 61800-5-2:2007, Adjustable speed electrical pow
41、er drive systems - Part 5-2: Safety requirements - Functional (IEC 61800-5-2:2007) EN ISO 23553-1:2014, Safety and control devices for oil burners and oil-burning appliances - Particular requirements - Part 1: Automatic and semi-automatic valves (ISO 23553-1:2014) 3 Terms and definitions For the pur
42、poses of this document, the terms and definitions given in EN 50156-1:2015 apply. 4 Requirements for safety devices and subsystems of safety-related systems 4.1 General The qualification and conformity for subsystems or devices as E/E/PES is defined in 4.2 and for subsystems and devices of other tec
43、hnology in 4.3 Safety functions of the safety related system, such as flame monitoring, pre-purge, air-gas ratio control, fuel safety shut-off-valves etc. shall fulfil the requirements of the relevant product standards (see 4.2.2 and 4.3.2). When thereof are deviations (e.g. concerning process techn
44、ical reasons, BS EN 50156-2:2015EN 50156-2:2015 (E) 7 operational reasons), the safety and reliability levels shall not be reduced. The deviations have to be described in the safety manual according to EN 61508-4:2010. For subsystems and devices in accordance to the relevant product standards a quan
45、titative determination of SIL is not required. 4.2 Requirements for safety devices and subsystems in electrical/electronic/ programmable electronic systems 4.2.1 General If product standard exists for subsystems and devices continue according 4.2.2, if no applicable standard exists continue 4.2.3. 4
46、.2.2 Type approval in accordance with product standards Safety devices or subsystems shall be used which have been tested in accordance with a product standard as per the following list, if they are in the scope of these standards: EN 298:2012, EN 1643:2014, EN 1854:2010, EN 12952-11:2007, EN 12953-
47、9:2007, EN 12067-2:2004, EN 13611:2007+A2:2011, EN 16340:2014 and EN 61800-5-2:2007, EN ISO 23552-1:2014. Products that combine several functions shall satisfy all the standards relevant for the functions. The product standards allow a range of subsystems with different level of functional safety. T
48、he requirements of the safety relevant systems according to the application standards have to be taken in account (e.g. EN 12952-8:2002, 6.3.3) NOTE Some of the product standards are based on fault-exclusion models similar to the approach in EN 501561:2015, Figures 11 to 13 and Table 2. By using the
49、se safety devices or subsystems in safety-related systems this may require special measures during the design and safety validation. 4.2.3 Type approval following the requirements of EN 61508 4.2.3.1 General Functional safety in accordance to EN 61508 (all parts) shall be proven for electrical/electronic/ programmable electronic systems within the safety function. Additionally the following requirements shall be fulfilled. 4.2.3.2 Safety requirement and functional specification: A specification describing the desired function of the device ha
