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BS EN 61203:1995

Current
Current

The latest, up-to-date edition.

Synthetic organic esters for electrical purposes. Guide for maintenance of transformer esters in equipment
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

15-06-1995

Committees responsible
National foreword
Foreword
1. Scope
2. Normative references
3. Tests and their significance
3.1 Colour and appearance
3.2 Density
3.3 Kinematic viscosity
3.4 Flash point - Fire point
3.5 Water content
3.6 Neutralization value
3.7 Breakdown voltage
3.8 D.C. resistivity
3.9 Dielectric dissipation factor
3.10 Diagnosis by gas analysis (IEC 567 and IEC 599)
4. Frequency of examination of liquids in service
5. Sampling
6. Testing procedures
6.1 Field screening tests
6.2 Laboratory tests
7. Classification of esters in service
8. Treatment of ester liquids in group 2
8.1 Vacuum treatment and filtration
8.2 Molecular sieve and filtration
9. Materials used for maintenance equipment
Annex ZA (normative) Other international publications
quoted in this standard with the references of the
relevant European publications

Applicable to esters orginally complying with the requirements of BS EN 61099

This International Standard is a guide to the maintenance of synthetic organic esters, originally complying with the requirements of IEC 1099, in transformers with rated voltages up to 35 kV. It is intended to assist the equipment operator in assessing the quality of the liquid during use in the equipment and maintaining it in a serviceable condition.

Methods for reconditioning ester transformer liquid are outlined.

This standard deals only with ester liquid used in equipment where liquid sampling is practicable and which has not previously been filled with any other liquid.

Committee
GEL/10
DevelopmentNote
Also numbered as IEC 61203 Supersedes 86/20278 DC (11/2005)
DocumentType
Standard
Pages
12
PublisherName
British Standards Institution
Status
Current

Standards Relationship
EN 61203:1994 Identical
NBN EN 61203 : 1995 Identical
SN EN 61203 : 1994 Identical
DIN EN 61203 : 1995 Identical
UNE-EN 61203:1996 Identical
NF EN 61203 : 1994 Identical
I.S. EN 61203:1995 Identical

HD 397 : 200S1 INTERPRETATION OF THE ANALYSIS OF GASES IN TRANSFORMERS AND OTHER OIL-FILLED ELECTRICAL EQUIPMENT IN SERVICE
BS EN 60567:2011 Oil-filled electrical equipment. Sampling of gases and analysis of free and dissolved gases. Guidance
BS 5800:1979 Guide for the interpretation of the analysis of gases in transformers and other oil-filled electrical equipment in service
BS EN 61099:2010 Insulating liquids. Specifications for unused synthetic organic esters for electrical purposes

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