Publication details
| Publication CODE |
Title |
| IEC 60450:2004 (2004-04) |
MEASUREMENT OF THE AVERAGE VISCOMETRIC DEGREE OF POLYMERIZATION OF NEW AND AGED CELLULOSIC ELECTRICALLY INSULATING MATERIALS |
| |
| Price Excl. VAT |
Total number of pages, tables and drawings |
|
159.00 €
|
45. |
Description
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.
|
| Class |
C990
(IEC PUBLICATIONS IEC PUBLICATIONS)
|
Status
| Status |
IEC PUBLICATION |
| Situation |
Currently active
Replaces
IEC 60450:1974
|
|
Origin
| Committee |
TC 112
Evaluation and qualification of electrical insulating materials and systems
|
| Responsible |
Monsieur DE LEEUW Thierry, Technical Officer
Diamant Building
Bd Auguste Reyers, 80
1030
BRUXELLES
Phone: +32 2 706 85 72
E-mail: thierry.deleeuw@ceb-bec.be
|
Approval
| BEC Approval |
2004-04-19 |
| ICS-Code (International Standards Classification) |
17.220.99
, 29.035.01
|
| NBN Status |
New |
|
| IEC publication date |
2004-04-19 |
| IEC stability date |
2023-12-31 |
| IEC last modification date |
2009-09-30 |
|
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