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Publication detail

 
Reference IEC 60450 ed2.1 Consol. with am1 withdrawn corrigendum
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Title Measurement of the average viscometric degree of polymerization of new and aged cellulosic electrically insulating materials
Publication date 2007-07-25
Format, price
(Swiss francs)
and language
165.- 45 pages
165.- 1328 Kb
 
Abstract 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. This consolidated version consists of the second edition (2004), and its amendment 1 (2007). Therefore, no need to order amendment in addition to this publication.
Technical Committee 112 - Evaluation and qualification of electrical insulating materials and systems  RSS
ICS Codes
17.220.99 Other standards related to electricity and magnetism

29.035.01 Insulating materials in general
 
Replaced by
Stability date 2018
 
Work in progress
ProjectStage codeForecast publication date
No project under development--


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