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



Reference EN 50550:2011/AC:2012
Title Power frequency overvoltage protective device for household and similar applications (POP)
Project Number 24027
Abstract/Scope This European Standard applies to power frequency overvoltage protection devices (hereafter referred to as “POP”) for household and similar uses, with a rated frequency of 50 Hz, a rated voltage 230 V a.c. (between phase and neutral), intended to be used in combination with a main protective device being either a CB in compliance with EN 60898 1 or EN 60898 2, a RCCB in compliance with EN 61008 1 or a RCBO in compliance with EN 61009 1. NOTE 1 Requirements for POPs in combination with switching devices other than a main protective device, or a POP integrated in a MPD, are under consideration. NOTE 2 Requirements for POP with functional earth connection regarding temporary overvoltage withstand are under consideration. NOTE 3 A POP is not a protective device to be used for automatic disconnection of the supply in the meaning of HD 60364 4 41. They are intended for use in an environment with pollution degree 2 and overvoltage category III. They can be designed for factory assembly or for assembly on site. These devices are intended to mitigate the effects of power frequency overvoltages between phase and neutral conductor (e.g. caused by loss of neutral conductor in the three phase supply upstream the POP) for downstream equipment by actuating the main protective device when an overvoltage between phase and neutral is detected. NOTE 4 To mitigate means in this context that the POP will provide protection in most cases of power frequency overvoltages. NOTE 5 Protection in case of overvoltage between phases is under consideration. In case of phase to phase electrical supply system with rated voltage between phases 230 V a.c. and no neutral conductor, one line monitored POP in compliance to this standard can be used according to manufacturer’s instruction. The POP does not impair the protective function of the main protective device. This European Standard does not apply for protection against common mode over voltages. This European Standard does not apply to surge protective devices. This European Standard states: – the definitions of terms used for POP (Clause 3); – the classification of POP (Clause 4); – the characteristics of POP (Clause 5); – the preferred values of the operating and influencing quantities (Clause 5); – the marking and information to be provided for POP (Clause 6); – the standard conditions for installation and operation in service (Clause 7); – the requirements for construction and operation (Clause 8); – the list of minimum requirements to be tested (Clause 9).


Current Stage code 6060
Current Stage code date 2012-03-30
Current Stage code deadline  
Deadline date for vote  


Directive(s) LVD (2006/95/EC), EMC (2004/108/EC)
Order Voucher  


IEC Technical Body  
Reference Document  
Keywords Overvoltage;Protection;Household
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2012-03-30   export to doc file  EN  FR
1099 2012-02-08    

Implementation Dates

date of Ratification (DOR) (1)  
date of Availability (DAV) (2) 2012-03-30
date of Announcement (DOA) (3) -
date of Publication (DOP) (4) -
date of Withdrawal (DOW) (5) -


Superseded by  
Normative reference (6)  

(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.