GB/T 21221-2007 (English Version) PDF

Standard No.: GB/T 21221-2007
Language: Chinese, Available in English version
Release Date: 2007
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Status: Be replaced 2023-02
Replace By: GB/T 21221-2022
Latest: GB/T 21221-2022

Scope: This standard specifies the specifications and test methods for several unused synthetic aromatic hydrocarbon insulating liquids used as insulating liquid medium for electrical equipment.

GB/T 21221-2007 Referenced Document

GB/T 10065-2007 Gassing of insulating liquids under electrical stress and ionization
GB/T 11133-1989 Liquid petroleum products--Determination of water--Karl Fischer reagent method
GB/T 11142-1989 Insulating oils--Determination of gassing under electrical stress and ionization
GB/T 1884 Crude petroleum and liquid petroleum products--Laboratory determination of density--Hydrometer method
GB/T 261-1983 Petroleum products--Determination of flash point--Closed cup method
GB/T 265-1988 Petroleum products--Determination of kinematic viscosity and calculation of dynamic viscosity
GB/T 3535-1983 Petroleum oils--Determination of pour point
GB/T 5654-2007 Insulating liquids.Measurement of relative permittivity,dielectric dissipation factor and d.c.resistivity
IEC 60156:1995 Insulating liquids - Determination of the breakdown voltage at power frequency - Test method
IEC 60475:1974 Method of sampling liquid dielectrics
IEC 61039:1990 General classification of insulating liquids
ISO 5662:1978 Petroleum products; Electrical insulating oils; Detection of corrosive sulphur
SH/T 0205-1992 Methods of measurement for the refractive index and specific dispersion of electrical insulating fluid

2022 GB/T 21221-2022 Insulating liquids—Specifications for unused liquids based on synthetic aromatic hydrocarbons
2007 GB/T 21221-2007 Insulating liquids.Specifications for unused insulating liquids based on synthetic aromatic hydrocarbons