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Specialty fluid · test-method registry

Transformer / Insulating Oil standards

Each published test is connected to its cited method and relevant international, Indian and industry companion protocols.

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Every referenced test and method.

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Transformer / Insulating Oil tests, cited methods and companion protocols
Test / parameterMethods cited on product pageRelevant protocols in registryWhy the test matters
Breakdown voltageIEC 60156 / ASTM D1816IEC 60156 · ASTM D1816 · ASTM D877 · IEC 60599 · IEEE C57.104 · IEC 60422Assesses dielectric strength and sensitivity to moisture and particles.
WaterIEC 60814 / ASTM D1533ASTM D6304 · ASTM D1533 · IEC 60814 · ISO 3733 · ASTM D2709 · IS 1448 Part 182 · DIN 51777Moisture strongly affects dielectric performance and paper insulation.
Acid numberIEC 62021 / ASTM D974 or D664ASTM D664 · ASTM D974 · IEC 62021 · IS 1448 Part 2 · DIN 51558 · ASTM D97Trends oxidation and acidic ageing products.
Dissolved gasesIEC 60567 / ASTM D3612IEC 60567 · ASTM D3612 · IEC 60599 · IEEE C57.104 · IEC 60422Supports diagnosis of electrical and thermal activity.
Interfacial tension / dissipation factorASTM D971 / IEC 60247ASTM D97 · ASTM D971 · ISO 6295 · IEC 60247Responds to polar contaminants and ageing products.
Dielectric breakdown voltageIEC 60156; ASTM D1816IEC 60156 · ASTM D1816 · ASTM D877 · IEC 60599 · IEEE C57.104 · IEC 60422Assesses insulating-fluid sensitivity to moisture, particles and fibres under the specified electrode system.
Dissolved gas analysisIEC 60567; ASTM D3612IEC 60567 · ASTM D3612 · IEC 60599 · IEEE C57.104 · IEC 60422Quantifies fault gases used with equipment history and interpretation guides to assess electrical and thermal activity.
Interfacial tensionASTM D971; ISO 6295ASTM D97 · ASTM D971 · ISO 6295 · IEC 60247Responds to polar contaminants and oxidation products in mineral insulating and turbine-type oils.
Particle count / cleanlinessISO 11500; reporting to ISO 4406ISO 11500 · ASTM D7647 · ISO 4406 · ISO 11171 · ISO 21018-4Quantifies solid-particle cleanliness where component clearances and servo reliability are sensitive.
28 applicable records

Method scope, role and issuing body.

Use the official link to verify status and edition. The summaries below explain diagnostic relevance without reproducing controlled method text.

ASTM · Test method

ASTM D664

Acid number and neutralisation number

Determines acidic or basic constituents by a defined titration system; results from different titration methods are not automatically interchangeable.

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ASTM · Test method

ASTM D974

Acid number and neutralisation number

Determines acidic or basic constituents by a defined titration system; results from different titration methods are not automatically interchangeable.

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IEC · Test method

IEC 62021

Acid number and neutralisation number

Determines acidic or basic constituents by a defined titration system; results from different titration methods are not automatically interchangeable.

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IS/BIS · Test method

IS 1448 Part 2

Acid number and neutralisation number

Determines acidic or basic constituents by a defined titration system; results from different titration methods are not automatically interchangeable.

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DIN · Test method

DIN 51558

Acid number and neutralisation number

Determines acidic or basic constituents by a defined titration system; results from different titration methods are not automatically interchangeable.

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ASTM · Test method

ASTM D6304

Water by Karl Fischer and product-specific methods

Quantifies water by coulometric or volumetric Karl Fischer titration, or by the product-specific separation method named in the governing specification.

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ASTM · Test method

ASTM D1533

Water by Karl Fischer and product-specific methods

Quantifies water by coulometric or volumetric Karl Fischer titration, or by the product-specific separation method named in the governing specification.

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IEC · Test method

IEC 60814

Water by Karl Fischer and product-specific methods

Quantifies water by coulometric or volumetric Karl Fischer titration, or by the product-specific separation method named in the governing specification.

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ISO · Test method

ISO 3733

Water by Karl Fischer and product-specific methods

Quantifies water by coulometric or volumetric Karl Fischer titration, or by the product-specific separation method named in the governing specification.

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ASTM · Test method

ASTM D2709

Water by Karl Fischer and product-specific methods

Quantifies water by coulometric or volumetric Karl Fischer titration, or by the product-specific separation method named in the governing specification.

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IS/BIS · Test method

IS 1448 Part 182

Water by Karl Fischer and product-specific methods

Quantifies water by coulometric or volumetric Karl Fischer titration, or by the product-specific separation method named in the governing specification.

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DIN · Test method

DIN 51777

Water by Karl Fischer and product-specific methods

Quantifies water by coulometric or volumetric Karl Fischer titration, or by the product-specific separation method named in the governing specification.

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ISO · Test method

ISO 11500

Particle count and cleanliness coding

Counts particles by a defined optical technique and reports concentration or a cleanliness code at stated size thresholds.

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ASTM · Test method

ASTM D7647

Particle count and cleanliness coding

Counts particles by a defined optical technique and reports concentration or a cleanliness code at stated size thresholds.

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ISO · Classification / guidance

ISO 4406

Particle count and cleanliness coding

Counts particles by a defined optical technique and reports concentration or a cleanliness code at stated size thresholds.

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ISO · Classification / guidance

ISO 11171

Particle count and cleanliness coding

Counts particles by a defined optical technique and reports concentration or a cleanliness code at stated size thresholds.

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ISO · Test method

ISO 21018-4

Particle count and cleanliness coding

Counts particles by a defined optical technique and reports concentration or a cleanliness code at stated size thresholds.

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IEC · Test method

IEC 60156

Insulating-liquid breakdown voltage

Determines dielectric breakdown voltage under the electrode system, gap and preparation specified by the selected method.

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ASTM · Test method

ASTM D1816

Insulating-liquid breakdown voltage

Determines dielectric breakdown voltage under the electrode system, gap and preparation specified by the selected method.

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ASTM · Test method

ASTM D877

Insulating-liquid breakdown voltage

Determines dielectric breakdown voltage under the electrode system, gap and preparation specified by the selected method.

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IEC · Test method

IEC 60567

Dissolved gas analysis

Extracts and quantifies gases dissolved in insulating liquids for transformer thermal and electrical fault assessment.

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ASTM · Test method

ASTM D3612

Dissolved gas analysis

Extracts and quantifies gases dissolved in insulating liquids for transformer thermal and electrical fault assessment.

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IEC · Classification / guidance

IEC 60599

Dissolved gas analysis

Extracts and quantifies gases dissolved in insulating liquids for transformer thermal and electrical fault assessment. Provides condition-supervision, maintenance and dissolved-gas interpretation guidance for mineral insulating liquids in electrical equipment.

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Industry / OEM · Classification / guidance

IEEE C57.104

Dissolved gas analysis

Extracts and quantifies gases dissolved in insulating liquids for transformer thermal and electrical fault assessment. Provides condition-supervision, maintenance and dissolved-gas interpretation guidance for mineral insulating liquids in electrical equipment.

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ASTM · Test method

ASTM D971

Interfacial tension and dielectric dissipation factor

Assesses polar contaminants, ageing products and dielectric losses in insulating or turbine-type fluids.

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ISO · Test method

ISO 6295

Interfacial tension and dielectric dissipation factor

Assesses polar contaminants, ageing products and dielectric losses in insulating or turbine-type fluids.

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IEC · Test method

IEC 60247

Interfacial tension and dielectric dissipation factor

Assesses polar contaminants, ageing products and dielectric losses in insulating or turbine-type fluids.

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IEC · Classification / guidance

IEC 60422

Transformer insulating-oil supervision and interpretation

Provides condition-supervision, maintenance and dissolved-gas interpretation guidance for mineral insulating liquids in electrical equipment.

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