International Standards and Conformity Assessment for all electrical, electronic and related technologies

 

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

Status

Current Stage code 6060
Current Stage code date 2007-08-31
Current Stage code deadline 2008-05-01
Deadline date for vote  

Legal

Directive(s)  
Mandate(s)  
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Details

IEC Technical Body IEC/TC 10
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
A-Deviation(s)  
Special National Condition(s)  

Environment

Clause
Categories - Aspects
Product Life Cycle
Information

History

Stage
Date
Deadline Date
Documents
6060 2007-08-31 2008-05-01 export to doc file  EN  FR  DE
5099 2007-08-01 2007-10-01  
5060 2007-07-03 2007-07-16 export to doc file  EN
5020 2007-04-27 2007-06-29  
3090 2007-01-05 2007-02-28  
5060 2006-10-23 2006-11-06 export to doc file  EN
5020 2006-05-19 2006-10-20  
1090 2006-05-16 2006-05-19  

Implementation Dates

date of Ratification (DOR) (1) 2007-08-01
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  
Superseded by  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.