CENELEC
Project
| 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. |
| Status |
Published
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Status
| Current Stage code | 6060 |
|---|---|
| Current Stage code date | 2004-06-18 |
| Current Stage code deadline | 2005-03-01 |
| Deadline date for vote |
Legal
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Details
| IEC Technical Body | IEC/TC 112 |
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| 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 |
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Environment
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Product Life Cycle
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Information
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History
Implementation Dates
| date of Ratification (DOR) (1) | 2004-06-01 |
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| 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 |
Relations
| Supersedes | |
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| 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.
