1、BSI Standards PublicationBS ISO 13577-4:2014Industrial furnace andassociated processingequipment SafetyPart 4: Protective systemsBS ISO 13577-4:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 13577-4:2014.The UK participation in its preparation was entrust
2、ed to TechnicalCommittee RHE/13, Oil burning equipment.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 are responsible for its correctapplication. The Britis
3、h Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 87031 6ICS 13.100; 25.180.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 A
4、ugust 2014.Amendments issued since publicationDate Text affectedBS ISO 13577-4:2014 ISO 2014Industrial furnace and associated processing equipment Safety Part 4: Protective systemsFours industriels et quipements associs Scurit Partie 4: Systmes de protectionINTERNATIONAL STANDARDISO13577-4First edit
5、ion2014-09-01Reference numberISO 13577-4:2014(E)BS ISO 13577-4:2014ISO 13577-4:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means,
6、electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel
7、. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 13577-4:2014ISO 13577-4:2014(E) ISO 2014 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Design requirements for e
8、quipment in a protective system 44.1 General . 44.2 Requirements for protective systems 54.3 Fault assessment for the hardwired section of protective systems154.4 Failure of utilities . 154.5 Reset 15Annex A (informative) Explanation of techniques and measures for avoiding systematic faults 16Annex
9、B (informative) Examples of techniques for avoiding failures from external wiring .18Annex C (informative) Examples for the determination of safety integrity level SIL using the risk graph method 22Annex D (informative) Example of an extended risk assessment for one safety instrumented function usin
10、g the IEC 61511 method .39Annex E (informative) Sample schematic diagrams of protective system 46Annex F (normative) Hardwiring protective systems 61Bibliography .71BS ISO 13577-4:2014ISO 13577-4:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of nat
11、ional standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. Interna
12、tional organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intend
13、ed for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.i
14、so.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document wil
15、l be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressi
16、ons related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 244, Industrial furnaces and associated pr
17、ocessing equipment.ISO 13577 consists of the following parts, under the general title Industrial furnaces and associated processing equipment Safety: Part 1: General requirements Part 2: Combustion and fuel handling systems Part 3: Generation and use of protective and reactive atmosphere gases Part
18、4: Protective systemsThe following part is under preparation: Part 11: Requirements for arc furnacesiv ISO 2014 All rights reservedBS ISO 13577-4:2014ISO 13577-4:2014(E)IntroductionThis part of ISO 13577 was developed to specify the requirements of a protective system, which is a safety-related elec
19、trical control system (SRECS) of industrial furnaces and associated processing equipment (TPE).Mandatory safety-related control functions of TPE are specified in ISO 13577-1, ISO 13577-2, and ISO 13577-3.It is intended that in designing the protective system of TPE, manufacturers of TPE choose from
20、the four methods provided in this part of ISO 13577.This part of ISO 13577 is to be used together with the other parts of ISO 13577. Since ISO 13577 is a type-C standard of ISO 12100, TPE are required to be designed in accordance with the principles of ISO 12100. However, there are cases in which a
21、risk assessment according to IEC 61511 (all parts) is more suitable for the design of a TPE protective system.This document is a type-C standard as stated in ISO 12100.The machinery concerned and the extent to which hazards, hazardous situations, or hazardous events are covered are indicated in the
22、scope of this part of ISO 13577.When requirements of this type-C standard are different from those which are stated in type-A or -B standards, the requirements of this type-C standard take precedence over the requirements of the other standards for machines that have been designed and built accordin
23、g to the requirements of this type-C standard.IEC 61511 (all parts) provides the option of a low-demand rate on the protective system. IEC 62061 or ISO 13849-1 always assume high-demand applications.Therefore, this part of ISO 13577 permits extended risk assessment for SRECS in which risk assessment
24、 based on IEC 61511 (all parts) can be chosen as an alternative. ISO 2014 All rights reserved vBS ISO 13577-4:2014BS ISO 13577-4:2014Industrial furnace and associated processing equipment Safety Part 4: Protective systems1 ScopeThis part of ISO 13577 specifies the requirements for protective systems
25、 used in industrial furnaces and associated processing equipment (TPE).The functional requirements to which the protective systems apply are specified in the other parts of ISO 13577.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and a
26、re indispensable to its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 13574:1), Industrial furnaces and associated processing equipment VocabularyISO 13849-1:2006, Safety
27、 of machinery Safety-related parts of control systems Part 1: General principles for designIEC 60947-4-1, Low-voltage switchgear and controlgear Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-startersIEC 60947-5-1, Low-voltage switchgear and controlgear Part 5-1: Co
28、ntrol circuit devices and switching elements - Electromechanical control circuit devicesIEC 60204-1, Safety of machinery Electrical equipment of machines Part 1: General requirementsIEC 60730-2-5, Automatic electrical controls for household and similar use Part 2-5: Particular requirements for autom
29、atic electrical burner control systemsIEC 61508 (all parts):2010, Functional safety of electrical/electronic/programmable electronic safety-related systemsIEC 61131-3, Programmable controllers Part 3: Programming languagesIEC 61511 (all parts), Functional safety Safety instrumented systems for the p
30、rocess industry sectorIEC 62061, Safety of machinery Functional safety of safety-related electrical, electronic and programmable electronic control systems3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 13574:2)and the following apply.1) To be publish
31、ed.2) To be published.INTERNATIONAL STANDARD ISO 13577-4:2014(E) ISO 2014 All rights reserved 1BS ISO 13577-4:2014ISO 13577-4:2014(E)3.1final elementpart of a protective system which implements the physical action necessary to achieve a safe stateNote 1 to entry: Examples are valves, switch gear, mo
32、tors including their auxiliary elements, for example, a solenoid valve and actuator if involved in the safety function.SOURCE: IEC 61511-1:2003, 3.2.24 modified: “instrumented system” had been changed to read “protective system” in the definition.3.2flame detector devicedevice by which the presence
33、of a flame is detected and signaledNote 1 to entry: It can consist of a flame sensor, an amplifier, and a relay for signal transmission.SOURCE: ISO 13574:2), 2.65, modified: The second sentence in the original definition had been presented as in the Note.3.3functional safetycapability of a protectiv
34、e system or other means to reduce risk, to execute the actions required for achieving or maintaining a safe state for the process and its related equipmentSOURCE: ISO 13574:2), 2.733.4logic functionfunction that performs the transformations between input information (provided by one or more input fu
35、nctions or sensors) and output information (used by one or more output functions or final elements)Note 1 to entry: Logic functions are executed by the logic solver of a protective system.SOURCE: IEC 61511-1:2003, 3.2.39, modified “input functions” had been changed to read “input functions or sensor
36、s” and “output function” had been changed to read “output function or final elements” in the definition, and the second sentence in the original definition had been deleted; Note has been added.3.5logic solverportion of a protective system that performs one or more logic function(s)Note 1 to entry:
37、Examples are electrical systems, electronic systems, programmable electronic systems, pneumatic systems, and hydraulic systems. Sensors and final elements are not part of the logic solver.SOURCE: IEC 61511-1:2003, 3.2.40 modified: “either a BPCS or SIS” had been changed to read “a protective system”
38、 in the definition; Note 1 in the original definition had been deleted.3.6manual resetaction after a lockout of a safety device (e.g. automatic burner control) carried out manually by the supervising operatorSOURCE: ISO 13574:3), 2.1073) To be published.2 ISO 2014 All rights reservedBS ISO 13577-4:2
39、014ISO 13577-4:2014(E)3.7performance levelPLdiscrete level used to specify the ability of safety-related parts of control systems to perform a safety function under foreseeable conditionsSOURCE: ISO 13849-1:2006, 3.1.233.8product standardstandard for products and devices which are listed in ISO 1357
40、7 (all parts) except this part of ISO 13577SOURCE: ISO 13574:3), 2.135 modified: “ISO 13577-4” has been changed to read “this part of ISO 13577” in the definition.3.9programmable logic controlPLCelectronic device designed for control of the logical sequence of eventsSOURCE: ISO 13574:, 2.1253.10prot
41、ective systeminstrumented system used to implement one or more safety-related instrumented functions which is composed of any combination of sensor(s), logic solver(s), and final elements (for example, see Figure 2)Note 1 to entry: This can include safety-related instrumented control functions or sa
42、fety-related instrumented protection functions or both.SOURCE: ISO 13574:, 2.1383.11safety busbus system and/or protocol for digital network communication between safety devices, which is designed to achieve and/or maintain a safe state of the protective system in compliance with IEC 61508 (all part
43、s):2010 or IEC 60730-2-5SOURCE: ISO 13574:, 2.1643.12safety devicedevice that is used to perform protective functions, either on its own or as a part of a protective system Note 1 to entry: Examples are sensors, limiters, flame monitors, burner control systems, logic systems, final elements, and aut
44、omatic shut-off valves.3.13safety integrity levelSILdiscrete level (one out of a possible four), corresponding to a range of safety integrity values, where safety integrity level 4 has the highest level of safety integrity and safety integrity level 1 has the lowestNote 1 to entry: The target failur
45、e measures for the four safety integrity levels are specified in IEC 61508-1:2010, Tables 2 and 3.Note 2 to entry: Safety integrity levels are used for specifying the safety integrity requirements of the safety functions to be allocated to the E/E/PE safety-related systems.Note 3 to entry: A safety
46、integrity level (SIL) is not a property of a system, subsystem, element, or device. The correct interpretation of the phrase “SIL n safety-related system” (where n is 1, 2, 3, or 4) is that the system is potentially capable of supporting safety functions with a safety integrity level up to n. ISO 20
47、14 All rights reserved 3BS ISO 13577-4:2014ISO 13577-4:2014(E)SOURCE: IEC 61508-4:2010, 3.5.83.14sensordevice that produces a signal based on a process variableEXAMPLE Transmitters, transducers, process switches, and position switches.3.15system for permanent operationsystem, which is intended to re
48、main in the running position for longer than 24 h without interruptionSOURCE: IEC 60730-2-5:2009, 2.5.1013.16system for non-permanent operationsystem, which is intended to remain in the running position for less than 24 hSOURCE: IEC 60730-2-5:2009, 2.5.1023.17systematic capabilitymeasure (expressed
49、on a scale of SC 1 to SC 4) of the confidence that the systematic safety integrity of an element meets the requirements of the specified SIL, in respect of the specified element safety function, when the element is applied in accordance with the instructions specified in the compliant item safety manual for the elementNote 1 to entry: Systematic capability is determined with reference to the requirements for the avoidance and control of systematic faults (see IEC 61508-2 and IEC
