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



Reference EN 60450:2004
Title Measurement of the average viscometric degree of polymerization of new and aged cellulosic electrically insulating materials
Project Number 15552
Abstract/Scope Describes a standardized method for the determination of the average viscometric degree of polymerization (DPv) of new and aged cellulosic electrically insulating materials. It may be applied to all cellulosic insulating materials such as those used in transformer, cable or capacitor manufacturing. The methods described can also be used for the determination of the intrinsic viscosity of solutions of chemically modified kraft papers, provided that these dissolve completely in the selected solvent. Caution should be taken if the method is applied to loaded kraft papers. Note: Within a sample of material, all the cellulose molecules do not have the same degree of polymerization so that the mean value measured by viscometric methods is not necessarily the same as that which may be obtained by, for instance, osmotic or ultra centrifuging methods. Experience has indicated the need for improved description of the experimental method. It describes a revised procedure that overcomes the limitations of the first edition.


Current Stage code 6060
Current Stage code date 2004-06-18
Current Stage code deadline 2005-03-01
Deadline date for vote  


Order Voucher  


IEC Technical Body IEC/TC 112
Reference Document IEC 60450:2004 (EQV)
ICS 17.220.99 - Other standards related to electricity and magnetism
29.035.01 - Insulating materials in general
Keywords Viscometry; Polymerisation; Insulation; Cellulosic
Note IEC 60450:2004 prepared by IEC/SC 15E
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2004-06-18 2005-03-01 export to doc file  EN
5099 2004-06-01 2004-10-01  
5061 2004-04-27 2004-06-01  
5020 2004-01-30 2004-04-02  
4099 2003-10-10 2003-11-30  
4020 2002-12-20 2003-05-23  
3099 2002-11-05 2002-11-08  

Implementation Dates

date of Ratification (DOR) (1) 2004-06-01
date of Availability (DAV) (2) 2004-06-18
date of Announcement (DOA) (3) 2004-09-01
date of Publication (DOP) (4) 2005-03-01
date of Withdrawal (DOW) (5) 2007-06-01


Superseded by  
Normative reference (6) ISO 287:1985
ISO 3105:1994
EN 60814:1997

(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.