Insulating liquids. Oil-impregnated paper and pressboard. Determination of water by automatic coulometric Karl Fischer titration

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

15-02-1998

Publisher

British Standards Institution

1 General
    1.1 Scope
    1.2 Normative references
2 Direct titration for low viscosity liquids
    2.1 Field of application
    2.2 Chemistry
    2.3 Apparatus
    2.4 Reagents and auxiliary materials
    2.5 Preparation of the apparatus
    2.6 Sampling methods
    2.7 Procedure
    2.8 Calculation of the result
    2.9 Report
    2.10 Precision
3 Evaporative stripping method for high viscosity liquids
    3.1 Field of application
    3.2 Outline of the method
    3.3 Apparatus and reagents
    3.4 Procedure
    3.5 Calculation of water content
    3.6 Report
4 Determination of water in oil-impregnated paper and
    pressboard
    4.1 Field of application
    4.2 Determination of water after previous extraction
          with methanol
    4.3 Determination by direct titration
    4.4 Evaporative stripping method
Figures
1 Block diagram of automatic titrator
2 Suitable titration vessel assembly
3 Block diagram of automatic titrator and evaporation
    stripping unit
4 Evaporator glass vessel with heater
5 Methanol container and extraction tube
Annexes
A Method for sampling of oil-impregnated paper and
    pressboard
ZA (normative) Normative references to international
    publications with their corresponding European
    publications

Covers procedures for determining water content of insulating liquids and in oil-impregnated cellulosic insulation with coulometrically generated Karl Fischer reagent.

This International Standard describes methods for the determination of water in insulating liquids and in oil-impregnated cellulosic insulation with coulometrically generated Karl Fischer reagent.

The method in clause 2 is applicable to water concentrations above 2 mg/kg in liquids having viscosity of less than 100 mm²/s at 40 °C.

The test method in clause 3, where water is extracted by means of a nitrogen stream, is the preferred method for insulating liquids of viscosity higher than 100 mm²/s.

Clause 4 describes methods for the determination of water content in oil-impregnated paper and pressboard over the range 0,1 % to 20 % by mass.

Committee	GEL/10
DevelopmentNote	Also numbered as IEC 60814 Supersedes BS 6725(1986) and 93/215953 DC (11/2005)
DocumentType	Standard
Pages	24
PublisherName	British Standards Institution
Status	Current
Supersedes	BS 6725:1986 93/215953 DC : DEC 93

Standards	Relationship
EN 60814:1997	Identical
I.S. EN 60814:1998	Identical
NF EN 60814 : 1998	Identical
DIN EN 60814 : 1999	Identical
NBN EN 60814 : 1998	Identical
SN EN 60814 : 1997	Identical
UNE-EN 60814:1999	Identical

BS 5730:2001	Monitoring and maintenance guide for mineral insulating oils in electrical equipment
08/30167496 DC : DRAFT FEB 2008	BS 148 - RECLAIMED MINERAL INSULATING OIL FOR TRANSFORMERS AND SWITCHGEAR - SPECIFICATION
BS 148:2009	Reclaimed mineral insulating oil for transformers and switchgear. Specification

ISO 595-2:1987	Reusable all-glass or metal-and-glass syringes for medical use Part 2: Design, performance requirements and tests
IEC 60475:2011	Method of sampling insulating liquids
IEC 60567:2011	Oil-filled electrical equipment - Sampling of gases and analysis of free and dissolved gases - Guidance
ISO 595-1:1986	Reusable all-glass or metal-and-glass syringes for medical use Part 1: Dimensions
EN 60567:2011	OIL-FILLED ELECTRICAL EQUIPMENT - SAMPLING OF GASES AND ANALYSIS OF FREE AND DISSOLVED GASES - GUIDANCE (IEC 60567:2011)
EN ISO 595-2:1994	REUSABLE ALL-GLASS OR METAL-AND-GLASS SYRINGES FOR MEDICAL USE - PART 2: DESIGN, PERFORMANCE REQUIREMENTS AND TESTS

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BS EN 60814:1998

Current

Table of Contents

Abstract

Scope

General Product Information

International Equivalents

Standards Referenced By This Book

Standards Referencing This Book

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