GB/T 14542-1993 Guide for maintenance and supervision of transformer oil in service

GB/T 14542-2005 Guide for maintenance and supervision of transformer oil in service

GB 7599 SH/T 0206 SD 304 GB/T 261-1983 Petroleum products—Determination of flash point—Closed cup method GB/T 261-2008 Determination of flash point—Pensky-Martens closed cup method GB/T 261-2021 Determination of flash point—Pensky-Martens closed cup method GB/T 264-1983 Petroleum products—Determination of acid number GB/T 507-2002 Insulating liquids—Determination of the breakdown voltage at power frequency GB/T 510-1983 Petroleum products—Determination of solidification point GB/T 510-2018 Determination of solidification point for petroleum products GB 2536-1990 Transformer oils GB 2536-2011 Fluids for electrotechnical applications—Unused mineral insulating oils for transformers and switchgear GB/T 3535-1983 Petroleum oils—Determination of pour point GB/T 3535-2006 Petroleum products—Determination of pour point GB/T 5654-1985 Measurement of relative permittivity, dielectric dissipation factor at power frequency and volume resistivity of insulating liquids GB/T 5654-2007 Insulating liquids—Measurement of relative permittivity,dielectric dissipation factor and d.c.resistivity GB/T 6541-1986 Petroleum products—Mineral oils—Determination of interfacial tension of oil against water—Ring method GB/T 7252-2001 Guide to the analysis and the diagnosis of gases dissolved in transformer oil GB/T 7595-2000 Quality criteria of transformer oils in service GB/T 7595-2008 Quality of transformer oils in service GB/T 7595-2017 Quality of transformer oils in service GB 7597-1987 Method of sampling for transformer and turbine oils in electric power industry GB/T 7597-2007 Method of sampling for transformer and turbine oils in electric power industry GB/T 7598-2008 Determination of water-soluble acid in transformer oils in service GB/T 7600-2014 Determination of water content in transformer oils and turbine oils in service by coulometric method GB/T 7601-2008 Determination of water content for transformer and turbine oils in service by gas chromatographic method GB/T 7602.1-2008 Determination of T501 oxidation inhibitor content in transformer oil or turbine oil—Part 1:spectrophotometric method GB/T 7602.2-2008 Determination of T501 oxidation inhibitor content in transformer oil or turbine oil—Part 2:Liquid chromatography GB/T 7602.3-2008 Determination of T501 oxidation inhibitor content in transformer oil or turbine oil—Part 3:Infrared spectroscopy method GB/T 7602.4-2017 Quantitative determination of T501 oxidation inhibitor content in transformer oil or turbine oil—Part 4:GC/MS method DL/T 421-2009 Method for Determining Volume Resistivity of Electrical Oil DL/T 423-2009 Method for measuring the content of gas in insulating oil by vacuum differential pressure method DL/T 429.2-2016 Electricity Oil Color Determination Method DL/T 429.6-2015 Electricity Oil Open Cup Aging Test Method DL/T 429.7-2017 Electricity Oil Sludge Analysis Method for Determination of Emulsion Content DL 429.2-1991 Power system oil quality test method: Color determination method DL 429.6-1991 Power system oil quality test method - Open cup aging determination method for operating oil DL 429.7-1991 Power system oil quality test method - Oil sludge precipitation determination method DL 429.9-1991 Electric Power System Oil Quality Test Method - Dielectric Strength Determination of Insulating Oil DL 450-1991 Method for measuring the content of gas in insulating oil (CO2 desorption method) GB 2536-2025 Fluids for electrotechnical applications—Unused mineral insulating oils for transformers and switchgear GB/T 11142-2025 Determination for gassing properties of insulating oil under electrical stress and ionization GB/T 3535-2025 Determination of pour point for petroleum products

IEC 422