CENELEC
Project
| Reference | EN 60970:2007 |
|---|---|
| Title | Insulating liquids - Methods for counting and sizing particles |
| Project Number | 20683 |
| Abstract/Scope | Describes the sampling procedures and methods for the determination of particle concentration and size distribution. Three methods are specified. One uses an automatic particle size analyser, working on the light interruption principle. The other two use an optical microscope, in either the transmitted light or incident light mode, to count particles collected on the surface of a membrane filter. The optical microscope methods are described in ISO 4407. All three methods are applicable to both used and unused insulating liquids. Annex A contains an alternative sampling procedure using a syringe and Annex B reports a reference for the calibration of automatic particle counters. The significant technical changes with respect to the previous edition are as follows: - new calibration procedures for automated laser particle; - three figures contamination code; - new procedure of sample pre-treatment when automated laser counter method are used. |
| Status |
Published
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Status
| Current Stage code | 6060 |
|---|---|
| Current Stage code date | 2007-08-31 |
| Current Stage code deadline | 2008-05-01 |
| Deadline date for vote |
Legal
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Details
| IEC Technical Body | IEC/TC 10 |
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| Reference Document | IEC 60970:2007 (EQV) |
| ICS | 17.220.99 - Other standards related to electricity and magnetism 29.040.10 - Insulating oils |
| Keywords | Insulating liquid; Liquid; Particles; Counting; Sizing |
| Note | Corrigendum to EN issued January 2008 |
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Environment
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Clause
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Categories - Aspects
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Product Life Cycle
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Information
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History
Implementation Dates
| date of Ratification (DOR) (1) | 2007-08-01 |
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| date of Availability (DAV) (2) | 2007-08-31 |
| date of Announcement (DOA) (3) | 2007-11-01 |
| date of Publication (DOP) (4) | 2008-05-01 |
| date of Withdrawal (DOW) (5) | 2010-08-01 |
Relations
| Supersedes | |
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| Superseded by | |
| Normative reference (6) | ISO 4406:1999 ISO 4407:2002 ISO 5884:1987 EN 50353:2001 IEC 60475:1974 |
(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.
