International Standards and Conformity Assessment for all electrical, electronic and related technologies



Reference EN 61557-15:201X
Title Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC - Equipment for testing, measuring or monitoring of protective measures - Part 15: functional safety requirements for insulation monitoring devices in IT systems and equipment for insulation fault location in IT systems
Project Number 24524
Abstract/Scope IEC 61557-15:2014 specifies requirements related to functional safety and is based on the IEC 61508 standard series for the realization of Insulation Monitoring Devices (IMD) as specified in IEC 61557-8 and for Insulation Fault Location Systems (IFLS) according to IEC 61557-9, according to phase 10 of the IEC 61508-1 lifecycle. These devices provide safety related functions for IT systems. This part of IEC 61557 is - concerned only with functional safety requirements intended to reduce the functional risk during the use of IMDs and IFLSs; - restricted to risks arising directly from the device itself or from several IMDs or IFLSs working together in a system; and - intended to define the basic safety functions provided by the devices. This part of IEC 61557 does not - deal with electrical safety according to IEC 61010-1 and the requirements of IEC 61557-8 and IEC 61557-9; - cover the hazard and risk analysis of a particular use of the IMD or IFLS; - identify all the safety functions for the application in which the IMD or IFLS is used; and - cover the IMD or IFLS manufacturing process. This part of IEC 61557 is to be used in conjunction with Part 8 and Part 9. Functional safety requirements depend on the application and should be considered as part of the overall risk assessment of the specific application. The supplier of IMDs and IFLSs is not responsible for the application. The application designer is responsible for the risk assessment and for specifying the overall functional safety requirements of the complete IT system and he should select the functional safety level (SIL) of the IMD and/or IFLS when their safety function is part of the functional safety assessment in the IT system.


Current Stage code 5099
Current Stage code date 2014-03-19
Current Stage code deadline 2014-04-16
Deadline date for vote  


Directive(s) LVD (2006/95/EC)
Order Voucher  


IEC Technical Body IEC/TC 85
Reference Document IEC 61557-15:2014 (EQV)
ICS 17.220.20 - Measurement of electrical and magnetic quantities
29.080.01 - Electrical insulation in general
29.240.01 - Power transmission and distribution networks in general
Note Work started in CLC/SR 85 then transferred into CLC/TC 85X after disbandment of SR (D145/087)*2014-02-20: Publication allocated to
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
5099 2014-03-19 2014-04-16  
5060 2014-01-20 2014-02-10 export to doc file  EN
5020 2013-11-15 2014-01-17  
3090 2013-11-12 2013-11-15  
5060 2013-02-25 2013-03-18 export to doc file  EN
5020 2012-11-16 2013-02-22  
1090 2012-11-14 2012-11-16  

Implementation Dates

date of Ratification (DOR) (1) 2014-03-19
date of Availability (DAV) (2)  
date of Announcement (DOA) (3) 2014-06-19
date of Publication (DOP) (4) 2014-12-19
date of Withdrawal (DOW) (5) 2017-03-19


(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved

(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat

(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level

(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement

(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn

(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.