GB/T 7970.4-2002
Replaced
GB/T 21216-2007
Active
National standards
GB/T 21216-2007 Insulating liquids—Determination of the dielectric dissipation factor by measurement of the conductance and capacitance—Test method
GB/T 21216-2007 Insulating liquids—Determination of the dielectric dissipation factor by measurement of the conductance and capacitance—Test method
Basic Information
Standard Code:
GB/T 21216-2007
Standard Type:
National standards
Standard Status:
Active
is_force_gb:
no
CCS Name:
Electrician's insulating materials and their products
ICS Name:
Paper and cardboard insulation materials
Publish Date:
2007-12-03
Implement Date:
2008-05-20
Pages:
15 pages
Scope
This standard introduces a method for measuring the dielectric loss factor tanδ of insulating liquids. This method obtains tanδ by simultaneously measuring the electrical conductivity G and capacitance C and then converting the results. This standard is applicable to unused insulating liquids and insulating liquids used in operating transformers or other electrical equipment. Although this standard is applicable to all liquids mentioned in GB/T 5654—2007, even high-insulation performance liquids, it does not replace GB/T 5654—2007. This method can accurately measure dielectric loss factors as small as 10-6 under power frequency, with a measurement range of 10-6 to 1. Under special conditions, it can reach 200.
Development Information
Referenced Standards
GB/T 5654-2007 Insulating liquids—Measurement of relative permittivity,dielectric dissipation factor and d.c.resistivity
GB/T 6379.1-2004 Accuracy(trueness and precision)of measurement methods and results—Part 1:General principles and definitions
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
ISO 5725-3:1994
ISO 5725-4:1994
Adopt standards
IEC 61620:1998
Related Standards
GB/T 19264.3-2003
Replaced
GB/T 19264.3-2003 Specification for pressboard and press paper for electrical purposes—Part 3:Specifications for individual materials—Sheet 1:Requirements for pressboard, types B.0.1,B.2.1,B.2.3,B.3.1,B.3.3,B.4.1,B.4.3,B.5.1,B.6.1 and B.7.1
GB/T 7969-2003
Replaced
GB/T 7969-2003 Electric power cable paper
GB/T 20628.1-2006
Active
GB/T 20628.1-2006 Specification for cellulosic papers for electrical purposes—Part 1:Definitions and general requirements
GB/T 20628.2-2006
Active
GB/T 20628.2-2006 Cellulosic papers for electrical purposes—Part 2:Methods of test
GB/T 20629.1-2006
Active