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



Reference EN 50209:1998
Title Test of insulation of bars and coils of high-voltage machines
Project Number 5919
Abstract/Scope This specification applies to rotating electrical machines with rated voltages (Un) from 5 kV to 24 kV inclusive and with rated output from 5 MVA upwards and from 5 MW upwards for motors Requirements for machines with rated voltage above 24 kV should remain the subject of individual agreement This specification is also applicable to machines with rated outputs between 1MVA( 1MW) and 5 MVA(5MW) and with rated voltages of 5 kV and above, provided its use has been agreed beforehand In the case of machines whose windings are cured in the stator, tests on the separate winding elements are not possible; for these machines the requirements in Part B apply. The test of the conductor lamination insulation must however be carried out in accordance with 23 of Part A of this standard


Current Stage code 6060
Current Stage code date 1998-03-25
Current Stage code deadline 1998-10-01
Deadline date for vote  


Order Voucher  


IEC Technical Body IEC/TC 2
Reference Document  
ICS 29.080 - Insulation
29.160.10 - Components for rotating machines
Keywords Insulation; Bar and coil; Machine; HV
Note Former HD 345 S1
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 1998-03-25 1998-10-01 export to doc file  EN
6020 1995-12-28 1996-03-28  
5099 1995-09-20 1995-10-20  
5062 1995-08-10 1995-09-20  
5020 1995-03-16 1995-06-15  
1090 1993-05-12 1994-09-30  

Implementation Dates

date of Ratification (DOR) (1) 1995-09-20
date of Availability (DAV) (2) 1998-03-25
date of Announcement (DOA) (3) 1996-04-01
date of Publication (DOP) (4) 1998-10-01
date of Withdrawal (DOW) (5) dor + 36 months


Superseded by  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.