1、 IEC 61557-15 Edition 1.0 2014-02 INTERNATIONAL STANDARD NORME INTERNATIONALE Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. Equipment for testing, measuring or monitoring of protective measures Part 15: Functional safety requirements for insulation monitor
2、ing devices in IT systems and equipment for insulation fault location in IT systems Scurit lectrique dans les rseaux de distribution basse tension de 1 000 V c.a. et 1 500 V c.c. Dispositifs de contrle, de mesure ou de surveillance de mesures de protection Partie 15: Exigences de scurit fonctionnell
3、e pour les contrleurs disolement de rseaux IT et les dispositifs de localisation de dfauts disolement pour rseaux IT IEC 61557-15:2014-02(EN-FR) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2014 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publicatio
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21、INTERNATIONAL STANDARD NORME INTERNATIONALE Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. Equipment for testing, measuring or monitoring of protective measures Part 15: Functional safety requirements for insulation monitoring devices in IT systems and equi
22、pment for insulation fault location in IT systems Scurit lectrique dans les rseaux de distribution basse tension de 1 000 V c.a. et 1 500 V c.c. Dispositifs de contrle, de mesure ou de surveillance de mesures de protection Partie 15: Exigences de scurit fonctionnelle pour les contrleurs disolement d
23、e rseaux IT et les dispositifs de localisation de dfauts disolement pour rseaux IT INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XC ICS 17.220.20, 29.080.01, 29.240.01 PRICE CODE CODE PRIX ISBN 978-2-8322-1406-0 Registered trademark of the International Electro
24、technical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 61557-15 IEC:2014 CONTENTS FOREW
25、ORD . 6 INTRODUCTION . 8 1 Scope 10 2 Normative references 10 3 Terms, definitions and abbreviations . 11 3.1 Terms and definitions . 11 3.2 Abbreviations . 22 4 Definition of safety functions embedded in IMDs and IFLSs . 23 4.1 General 23 4.2 Definition of safety functions 23 4.2.1 Local insulation
26、 warning (LIW) 23 4.2.2 Remote insulation warning (RIW) 24 4.2.3 Local location warning (LLW) 24 4.2.4 Remote location warning (RLW) 24 4.2.5 Remote enabling / disabling command (REDC) . 25 4.2.6 Local transformer monitoring warning (LTMW) 25 5 Requirements on products implementing safety-related fu
27、nctions 25 5.1 Requirement on non-safety-related functions . 25 5.2 Additional performance requirements for products implementing safety functions 26 5.2.1 General 26 5.2.2 Additional performance requirements for IMDs complying with SIL 1 or SIL 2 . 26 5.2.3 Additional performance requirements for I
28、FLSs complying with SIL 1 or SIL 2 . 26 6 Management of functional safety during the development lifecycle 26 6.1 Management of functional safety for the IT system . 26 6.2 Use of IMDs and IFLSs in IT systems. 27 6.3 Safety lifecycle of IMDs and IFLSs in the realisation phase 27 7 Management of func
29、tional safety during the realisation lifecycle of IMDs and IFLSs. 28 7.1 General 28 7.2 IMD and IFL design requirement specification (phase 10.1) . 29 7.2.1 Specification of functional safety requirements . 29 7.2.2 Provisions for the development of safety functions . 29 7.2.3 Verification plan for
30、the development of safety functions . 30 7.2.4 Validation plan for the development of safety functions . 30 7.2.5 Planning of commissioning, installation and setting into operation 30 7.2.6 Planning of user documentation 31 7.3 IMD and IFLS safety validation planning (phase 10.2) 31 7.3.1 General 31
31、 7.3.2 Functional safety plan . 31 7.4 IMD and IFLS design and development (phase 10.3) . 32 7.4.1 General 32 7.4.2 Design standards 32 7.4.3 Realization . 32 61557-15 IEC:2014 3 7.4.4 Safety integrity and fault detection 32 7.4.5 Safety integrity level (SIL) assignment 33 7.4.6 Hardware requirement
32、s 33 7.4.7 Software requirements 33 7.4.8 Review of requirements 33 7.4.9 Requirements for the probability of dangerous failure on demand (PFD) 34 7.4.10 Failure rate data . 35 7.4.11 Diagnostic test interval . 35 7.4.12 Architectural constraints . 35 7.4.13 Estimation of safe failure fraction (SFF)
33、 37 7.4.14 Requirements for systematic safety integrity . 37 7.5 IMD and IFLS integration (phase 10.4) . 40 7.5.1 Hardware integration 40 7.5.2 Software integration 40 7.5.3 Modifications during integration 40 7.5.4 Integration tests 40 7.6 IMD and IFLS documentation related to installation, commiss
34、ioning, operation and maintenance procedures (phase 10.5) . 41 7.6.1 General 41 7.6.2 Functional specification 41 7.6.3 Compliance information 41 7.6.4 Information for commissioning, installation, setting into operation, operation and maintenance 41 7.7 IMD and IFLS safety validation (phase 10.6) 42
35、 7.7.1 General 42 7.7.2 Test 42 7.7.3 Verification . 42 7.7.4 Validation . 43 7.7.5 EMC requirements 43 8 Requirements for modifications 44 8.1 General 44 8.2 Modification request . 44 8.3 Impact analysis 44 8.4 Authorization 44 9 Proven in use approach . 44 Annex A (informative) Risk analysis and S
36、IL assignment for IMDs and IFLSs 45 A.1 General 45 A.2 SIL assignment for IMDs and IFLSs . 47 A.3 Example of risk graph 48 A.4 Alternative method of SIL assignment quantitative method 49 Annex B (informative) Examples for the determination of PFD, DC and SFF 50 B.1 General 50 B.2 Examples of IMD and
37、 IFLS architectures . 51 Annex C (informative) Failure rate databases 52 C.1 General 52 C.2 Failure rate references in current standards . 52 Annex D (informative) Guide to embedded software design and development 53 D.1 General 53 4 61557-15 IEC:2014 D.2 Software element guidelines 53 D.2.1 General
38、 53 D.2.2 Interface with system architecture. 53 D.2.3 Software specifications . 53 D.2.4 Pre-existent software 54 D.2.5 Software design 55 D.2.6 Coding 55 D.3 Software development process guidelines 55 D.3.1 Development process: software lifecycle 55 D.3.2 Documentation: documentation management 55
39、 D.3.3 Configuration and software modification management 56 D.3.4 Configuration and archiving management . 56 D.3.5 Software modifications management . 57 D.4 Development tools . 57 D.5 Reproduction of executable code production 57 D.6 Software verification and validation 57 D.7 General verificatio
40、n and validation guidelines 57 D.8 Verification and validation review . 58 D.9 Software testing . 58 D.9.1 General validation 58 D.9.2 Software specification verification: validation tests . 59 D.9.3 Software design verification: software integration tests . 59 D.9.4 Detailed design verification: mo
41、dule tests . 60 Annex E (informative) Information for the assessment of safety functions 61 E.1 General 61 E.2 Documentation management 61 E.3 Documentation provided for conformity assessment . 61 E.4 Documentation of the development lifecycle. 63 E.5 Design documentation . 63 E.6 Documentation of v
42、erification and validation 63 E.7 Test documentation . 63 E.8 Documentation of modifications . 63 E.9 Information for use . 63 Annex F (informative) Example of applications . 64 F.1 Overview 64 F.2 Limitation in applications 64 F.3 Typical applications covered by IEC 61557-15 . 64 F.3.1 General 64 F
43、3.2 Local alarming 64 F.3.3 Local transformer monitoring warning . 65 F.3.4 Alarming and processing of remote insulation warning and/or remote location warning 66 F.3.5 Automatic disconnection of the complete IT system in case of a first insulation fault 67 F.3.6 Automatic disconnection of an IT sy
44、stem sub-network 69 F.3.7 Management of multiple source system (two incomers or of incomer plus generator) 71 F.3.8 Management of multiple source systems (two incomers or of incomer plus generator with a load shedder) 72 Bibliography 74 61557-15 IEC:2014 5 Figure 1 Relationship between IEC 61557-15
45、and related standards 8 Figure 2 Overall safety lifecycle applicable to an IT system . 27 Figure 3 IMD and IFLS safety lifecycle (in realisation phase) . 28 Figure A.1 Functional elements of an IT system and their relationship to the definitions and abbreviations of the IEC 61508 series . 45 Figure
46、A.2 SIL assignment for IMDs and IFLSs 47 Figure A.2 Example of risk graph . 48 Figure B.1 Flowchart for PFD, DC, SFF determination . 51 Figure F.1 Local alarming, based on the systematic presence of one person and based on a well-defined alarming management process 65 Figure F.2 Local transformer mo
47、nitoring warning, based on the systematic presence of a skilled person, and based on a well-defined alarming management process 66 Figure F.3 Alarming and processing of the remote insulation warning and/or the remote location warning in a supervisory control system . 67 Figure F.4 Disconnection of t
48、he complete IT system in case of insulation fault detection . 68 Figure F.5 Threshold 1 warning information and threshold 2 disconnection of the complete IT system in case of an insulation fault detection . 69 Figure F.6 Automatic disconnection of a faulty feeder via direct signal from the IFLS . 70
49、 Figure F.7 Automatic disconnection of a faulty feeder via a PLC 71 Figure F.8 Management of multiple source systems (two incomers or of one incomer plus generator) . 72 Figure F.9 Management of multiple source system (two incomers or of one incomer plus generator, with a load shedder) . 73 Table 1 Abbreviations with reference . 22 Table 2 Safety integrity levels (SIL) and probability of a dangerous f
