• IEC 62770:2013

    Current The latest, up-to-date edition.

    Fluids for electrotechnical applications - Unused natural esters for transformers and similar electrical equipment

    Available format(s):  Hardcopy, PDF, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s):  English - French, Spanish, Castilian

    Published date:  19-11-2013

    Publisher:  International Electrotechnical Committee

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    Table of Contents - (Show below) - (Hide below)

    FOREWORD
    INTRODUCTION
    1 Scope
    2 Normative references
    3 Terms and definitions
    4 Properties, their significance and
      test methods
    5 Classification, identification, general delivery
      requirements and sampling
    Annex A (normative) - Summary of the test method
            for evaluating oxidation stability of unused
            natural esters
    Annex B (informative) - Specifications of low-viscosity
            insulating fluids derived from natural esters
    Bibliography

    Abstract - (Show below) - (Hide below)

    IEC 62770:2013 describes specifications and test methods for unused natural esters in transformers and similar oil-impregnated electrical equipment in which a liquid is required as an insulating and heat transfer medium. Natural esters with additives are within the scope of this standard. Because of their different chemical composition, natural esters differ from insulating mineral oils and other insulating fluids that have high fire points, such as synthetic esters or silicone fluids. Natural, ester-derived insulating fluids with low viscosity have been introduced but are not covered by this standard. Pertinent properties of such fluids are given in Annex B. This standard is applicable only to unused natural esters. Reclaimed natural esters and natural esters blended with non-natural esters fluids are beyond the scope of this standard.

    General Product Information - (Show below) - (Hide below)

    Committee TC 10
    Development Note Stability date: 2019. (11/2013)
    Document Type Standard
    Publisher International Electrotechnical Committee
    Status Current

    Standards Referenced By This Book - (Show below) - (Hide below)

    I.S. EN IEC 61125:2018 INSULATING LIQUIDS - TEST METHODS FOR OXIDATION STABILITY - TEST METHOD FOR EVALUATING THE OXIDATION STABILITY OF INSULATING LIQUIDS IN THE DELIVERED STATE
    IEC 60076-7:2018 Power transformers - Part 7: Loading guide for mineral-oil-immersed power transformers
    IEC 61125:2018 Insulating liquids - Test methods for oxidation stability - Test method for evaluating the oxidation stability of insulating liquids in the delivered state
    EN IEC 61125 : 2018 INSULATING LIQUIDS - TEST METHODS FOR OXIDATION STABILITY - TEST METHOD FOR EVALUATING THE OXIDATION STABILITY OF INSULATING LIQUIDS IN THE DELIVERED STATE (IEC 61125:2018)
    I.S. EN 60079-6:2015 EXPLOSIVE ATMOSPHERES - PART 6: EQUIPMENT PROTECTION BY LIQUID IMMERSION 'O'
    IEC 60079-6:2015 Explosive atmospheres - Part 6: Equipment protection by liquid immersion "o"
    UNE-EN 60079-6:2016 Explosive atmospheres - Part 6: Equipment protection by liquid immersion "o"
    BS EN IEC 61125:2018 Insulating liquids. Test methods for oxidation stability. Test method for evaluating the oxidation stability of insulating liquids in the delivered state
    BS EN 60079-6:2007 EXPLOSIVE ATMOSPHERES - PART 6: EQUIPMENT PROTECTION BY BY LIQUID IMMERSION 'O'
    IEEE C57.155 : 2014 GUIDE FOR INTERPRETATION OF GASES GENERATED IN NATURAL ESTER AND SYNTHETIC ESTER-IMMERSED TRANSFORMERS
    EN 60079-6:2015 Explosive atmospheres - Part 6: Equipment protection by liquid immersion "o"

    Standards Referencing This Book - (Show below) - (Hide below)

    ISO 3016:1994 Petroleum products Determination of pour point
    ISO 2719:2016 Determination of flash point Pensky-Martens closed cup method
    IEC 61125:1992 Unused hydrocarbon based insulating liquids - Test methods for evaluating the oxidation stability
    ISO 3675:1998 Crude petroleum and liquid petroleum products Laboratory determination of density Hydrometer method
    IEC 61039:2008 Classification of insulating liquids
    IEC 60422:2013 Mineral insulating oils in electrical equipment - Supervision and maintenance guidance
    IEC 60156:1995 Insulating liquids - Determination of the breakdown voltage at power frequency - Test method
    IEC 60050-212:2010 International Electrotechnical Vocabulary (IEV) - Part 212: Electrical insulating solids, liquids and gases
    IEC 60076-14:2013 Power transformers - Part 14: Liquid-immersed power transformers using high-temperature insulation materials
    IEC 62535:2008 Insulating liquids - Test method for detection of potentially corrosive sulphur in used and unused insulating oil
    IEC 60475:2011 Method of sampling insulating liquids
    IEC 61100:1992 Classification of insulating liquids according to fire-point and net calorific value
    IEC 61099:2010 Insulating liquids - Specifications for unused synthetic organic esters for electrical purposes
    IEC 61868:1998 Mineral insulating oils - Determination of kinematic viscosity at very low temperatures
    ASTM D 1275 : 2015 Standard Test Method for Corrosive Sulfur in Electrical Insulating Liquids
    IEC 60296:2012 RLV Fluids for electrotechnical applications - Unused mineral insulating oils for transformers and switchgear
    ISO 12185:1996 Crude petroleum and petroleum products Determination of density Oscillating U-tube method
    IEC 60050-421:1990 International Electrotechnical Vocabulary (IEV) - Part 421: Power transformers and reactors
    IEC 62697-1:2012 Test methods for quantitative determination of corrosive sulfur compounds in unused and used insulating liquids - Part 1: Test method for quantitative determination of dibenzyldisulfide (DBDS)
    IEC 60666:2010 Detection and determination of specified additives in mineral insulating oils
    IEC 61620:1998 Insulating liquids - Determination of the dielectric dissipation factor by measurement of the conductance and capacitance - Test method
    IEC 60814:1997 Insulating liquids - Oil-impregnated paper and pressboard - Determination of water by automatic coulometric Karl Fischer titration
    IEC 60247:2004 Insulating liquids - Measurement of relative permittivity, dielectric dissipation factor (tan d) and d.c. resistivity
    IEC 61619:1997 Insulating liquids - Contamination by polychlorinated biphenyls (PCBs) - Method of determination by capillary column gas chromatography
    IEC 61198:1993 Mineral insulating oils - Methods for the determination of 2-furfural and related compounds
    IEEE C57.147 : 2008 ACCEPTANCE AND MAINTENANCE OF NATURAL ESTER FLUIDS IN TRANSFORMERS
    IEC 62021-3:2014 Insulating liquids - Determination of acidity - Part 3: Test methods for non-mineral insulating oils
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