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INSULATING OIL - DETERMINATION OF FIBRE CONTAMINATION BY THE COUNTING METHOD USING A MICROSCOPE

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

01-01-2001

Publisher

National Standards Authority of Ireland

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Only cited Standards give presumption of conformance to New Approach Directives/Regulations.

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Cleaning procedure
8 Sampling
9 Filtration procedure
10 Microscope calibration
11 Fibre counting and expression of results
12 Calculation and expression of results
13 Precision
14 Test report
Figure 1 - Schematic representation of a suitable
           filtration apparatus
Annex A (normative) - Method for low fibre concentrations
  A.1 Reagents
  A.2 Apparatus
  A.3 Initial set-up and cleaning
  A.4 Sampling, and filtration of oil sample
  A.5 Blank tests
  A.6 Counting method
  A.7 Calculation and expression of results
  A.8 Precision
  A.9 Test report
Figure A.1 - Schematic representation of a suitable
             filtration apparatus for low fibre
             concentrations

Describes two methods for determining the fibre contamination of mineral insulating oil used in electrotechnical equipment, based on filtering a sample of oil and examining and counting the number of fibres on the surface of the filter using an optical microscope.

DocumentType	Standard
Pages	17
PublisherName	National Standards Authority of Ireland
Status	Current

Standards	Relationship
DIN EN 50353 : 2002	Identical
UNE-EN 50353:2002	Identical
NBN EN 50353 : 2001	Identical
NEN EN 50353 : 2001	Identical
SN EN 50353 : 2001	Identical
EN 50353:2001	Identical
NF EN 50353 : 2003	Identical
BS EN 50353:2001	Identical