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



Reference EN 50438:2013
Title Requirements for micro-generating plants to be connected in parallel with public low-voltage distribution networks
Project Number 22109
Abstract/Scope This European Standard specifies technical requirements for the protection functions and the operational capabilities of micro-generating plants, designed for operation in parallel with public low-voltage distribution networks. This European Standard applies irrespectively of the micro-generating plants’ primary source of energy, where micro-generation refers to equipment with nominal currents up to and including 16 A per phase, single or multi phase 230/400 V or multi phase 230 V (phase-to-phase nominal voltage). For practical reasons, this European Standard refers to the distribution system operator in case settings have to be defined and/or provided, even when these settings are to be defined and/or provided by another actor according to national and European legal framework. NOTE 1 This includes European network codes and their national implementation, as well as further national regulations. NOTE 2 Further national requirements especially for the connection to the grid and the operation of the micro-generator can apply as long as they are not in conflict with this EN. In some countries, this document may be applied to generators with higher nominal currents used mostly in domestic and small commercial installations. These countries are listed in Annex G. The provisions of this European Standard are not intended to ensure by themselves the safety of DSO personnel or their contracted parties. The following aspects are included in the scope: • all micro-generation technologies are applicable. The following aspects are excluded from the scope: • multiple units that for one installation, in aggregate, exceed 16 A; • issues of revenue rebalancing, metering or other commercial matters; • requirements related to the primary energy source e.g. matters related to gas fired generator units; • island operation of generating plants, both intentional and unintentional, where no part of the public distribution network is involved; • active front ends of drives feeding energy back into the distribution network for short duration.


Current Stage code 6060
Current Stage code date 2013-12-06
Current Stage code deadline 2014-11-04
Deadline date for vote 2013-03-01


Mandate(s) M/490
Order Voucher  


IEC Technical Body IEC/TC 8
Reference Document  
ICS 29.160.20 - Generators
Keywords Generator; Micro-generator; Connection; Public; Low-voltage
Note Supersedes EN 50438:2007 * 2010-10 TC decision: To begin shortly the voting procedure and immediately after the vote, to start a new maintenance work in order to amend clause 4.2.2 and Annex H (jointly with WG 1) * 2013-09-30: Publication allocated to
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2013-12-06 2014-11-04 export to doc file  EN  FR  DE
5099 2013-11-04 2013-12-02  
5060 2013-09-30 2013-10-21 export to doc file  EN
5020 2013-07-26 2013-09-27 export to doc file  EN  FR
4099 2013-05-03    
4060 2013-01-16 2013-02-06 export to doc file  EN
4020 2012-08-10 2013-01-11 export to doc file  EN  FR
3099 2012-07-12    
1099 2009-02-01 2009-08-01  
1000 2008-10-22 2009-01-31  

Implementation Dates

date of Ratification (DOR) (1) 2013-11-04
date of Availability (DAV) (2) 2013-12-06
date of Announcement (DOA) (3) 2014-05-04
date of Publication (DOP) (4) 2014-11-04
date of Withdrawal (DOW) (5) 2016-11-04


Supersedes EN 50438:2007
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.