Measurement of the average viscometric degree of polymerization of new and aged cellulosic electrically insulating materials

Amandma A1:2008 je dodatek k standardu SIST EN 60450:2005
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.

Messung des durchschnittlichen viskosimetrischen Polymerisationsgrades von neuen und gealterten cellulosehaltigen Elektroisolierstoffen

Mesure du degré de polymérisation moyen viscosimétrique des matériaux isolants cellulosiques neufs et vieillis à usage électrique

Merjenje povprečne viskozimetrične stopnje polimerizacije novih in staranih celuloznih elektroizolacijskih materialov (IEC 60450:2004/A1:2007)

General Information

Status
Published
Publication Date
05-Nov-2007
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
24-Oct-2007
Due Date
29-Dec-2007
Completion Date
06-Nov-2007

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SLOVENSKI STANDARD
SIST EN 60450:2005/A1:2008
01-januar-2008
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Measurement of the average viscometric degree of polymerization of new and aged
cellulosic electrically insulating materials (IEC 60450:2004/A1:2007)
Messung des durchschnittlichen viskosimetrischen Polymerisationsgrades von neuen
und gealterten cellulosehaltigen Elektroisolierstoffen (IEC 60450:2004/A1:2007)
Mesure du degré de polymérisation moyen viscosimétrique des matériaux isolants
cellulosiques neufs et vieillis a usage électrique (IEC 60450:2004/A1:2007)
Ta slovenski standard je istoveten z: EN 60450:2004/A1:2007
ICS:
17.220.99 Drugi standardi v zvezi z Other standards related to
elektriko in magnetizmom electricity and magnetism
29.035.01 Izolacijski materiali na Insulating materials in
splošno general
SIST EN 60450:2005/A1:2008 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
EN 60450/A1
NORME EUROPÉENNE
June 2007
EUROPÄISCHE NORM
ICS 17.220.99; 29.035.01
English version
Measurement of the average viscometric degree of polymerization
of new and aged cellulosic electrically insulating materials
(IEC 60450:2004/A1:2007)
Mesure du degré de polymérisation Messung des durchschnittlichen
moyen viscosimétrique des matériaux viskosimetrischen Polymerisationsgrades
isolants cellulosiques neufs von neuen und gealterten
et vieillis à usage électrique cellulosehaltigen Elektroisolierstoffen
(CEI 60450:2004/A1:2007) (IEC 60450:2004/A1:2007)

This amendment A1 modifies the European Standard EN 60450:2004; it was approved by CENELEC on

2007-06-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which

stipulate the conditions for giving this amendment the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on

application to the Central Secretariat or to any CENELEC member.

This amendment exists in three official versions (English, French, German). A version in any other language

made by translation under the responsibility of a CENELEC member into its own language and notified to the

Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the

Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,

Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60450:2004/A1:2007 E
---------------------- Page: 2 ----------------------
EN 60450:2004/A1:2007 - 2 -
Foreword

The text of document 112/49/CDV, future amendment 1 to IEC 60450:2004, prepared by IEC TC 112,

Evaluation and qualification of electrical insulating materials and systems, was submitted to the

IEC-CENELEC Parallel Unique Acceptance Procedure and was approved by CENELEC as
amendment A1 to EN 60450:2004 on 2007-06-01.
The following dates were fixed:
– latest date by which the amendment has to be
implemented at national level by publication of
an identical national standard or by endorsement (dop) 2008-03-01
– latest date by which the national standards confli
...

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