IEC 61620:1998 PDF

Scope: This standard introduces a method for measuring the dielectric loss factor tanδ of insulating liquids. This method obtains tanδ by synchronously measuring the conductance G and capacitance C and then converting it. This standard is applicable to unused insulating liquids and operating transformers or other Insulating liquid used in electrical equipment. Although this standard applies to all liquids mentioned in GB/T 5654-2007, even high-insulating liquids, this standard does not replace GB/T 5654-2007. This method can accurately measure dielectric loss factors as small as 10 under power frequency. Its measurement range is between 10 and 1, and can reach 200 under special conditions.

IEC 61620:1998 Referenced Document

GB/T 5654-2007 Insulating liquids.Measurement of relative permittivity,dielectric dissipation factor and d.c.resistivity*， 2007-12-03 Update
GB/T 6379.1-2004 Accuracy(trueness and precision)of measurement methods and results Part 1:General principles and definitions*， 2004-06-02 Update
GB/T 6379.2-2004 Accuracy(trueness and precision)of measurement methods and results-Part 2:Basic method for the determination of repeatability and reproducibility of a standard measurement method*， 2004-06-02 Update
ISO 5725-3:1994 Accuracy (trueness and precision) of measurement methods and results - Part 3: Intermediate measures of the precision of a standard measurement method
ISO 5725-4:1994 Accuracy (trueness and precision) of measurement methods and results - Part 4: Basic methods for the determination of the trueness of a standard measurement method

1998 IEC 61620:1998 Insulating liquids - Determination of dielectric dissipation factor by measurement of the conductance and capacitance - Test method