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



Reference FprEN 62271-202:2013
Title High-voltage switchgear and controlgear - Part 202: High-voltage/low-voltage prefabricated substation
Project Number 24201
Abstract/Scope IEC 62271-202:2014 specifies the service conditions, rated characteristics, general structural requirements and test methods of high voltage/low voltage or low voltage/high voltage prefabricated substations, which are cable-connected, to be operated from inside (walk-in type) or outside (non-walk-in type) for alternating current of rated voltages above 1 kV and up to and including 52 kV on the high voltage side, and for one or more transformers for service frequencies up to and including 60 Hz for outdoor installation at locations with public accessibility and where protection of personnel is provided. This second edition cancels and replaces the first edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) regarding temperature-rise test an alternative method for liquid filled transformers is (re)introduced and the temperature-rise test method for dry-type transformers is specified more precisely; b) testing procedure for short time and peak withstand current tests are specified more precisely; c) assessment of electromagnetic fields is considered including a type test (optional) according IEC/TR 62271-208:2009; d) influence of the product on the environment is considered (Clause 12); e) internal arc test requirements have been adapted to IEC 62271-200:2011 and requirements for the assessment of pressure relief volumes below the floor / ground has been assigned; f) the method for defining the load factor in an enclosure for liquid filled transformers is extended with different temperature rises for the transformer outside the enclosure (Annex DD); g) for the calculation of the load factor of dry-type transformers in an enclosure the insulation systems according to IEC 60076-1:2011, Tables B.1 and B.2 are worked out in detail.
Approval stage


Current Stage code 5060
Current Stage code date 2014-02-17
Current Stage code deadline 2014-03-10
Deadline date for vote  


Order Voucher  


IEC Technical Body IEC/SC 17C
Reference Document IEC 62271-202:2014 (EQV)
ICS 29.130.10 - High voltage switchgear and controlgear
Keywords Substation; HV; LV; Prefabricated
Note Will supersede EN 62271-202:2007*2014-04-03: Publication allocated to
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
5060 2014-02-17 2014-03-10 export to doc file  EN
5020 2013-12-13 2014-02-14  
3090 2013-12-10 2013-12-13  
5060 2012-10-16 2012-11-06 export to doc file  EN
5020 2012-05-11 2012-10-12  
1090 2012-05-08 2012-05-11  

Implementation Dates

date of Ratification (DOR) (1)  
date of Availability (DAV) (2)  
date of Announcement (DOA) (3) dor + 3 months
date of Publication (DOP) (4) dor + 9 months
date of Withdrawal (DOW) (5) dor + 36 months


Supersedes EN 62271-202:2007
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.