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  • BSI
    BS 4542:1970 Method for determination of loss tangent and permittivity of electrical insulating materials in sheet form (Lynch method)
    Edition: 1970
    $304.06
    / user per year

Description of BS 4542:1970 1970

This British Standard describes the Lynch method for the determination of the loss tangent and the permittivity of insulating materials at frequencies of 1 kHz to 100 kHz at normal room temperatures. It gives details of the apparatus and of the procedure to be followed.

The frequency range can be extended downward to 50 Hz unless the surface resistivity of the specimen is low (e.g. 1010 Ω). It can be extended upward to 1 MHz by taking the precautions suggested in Clause 6 and in Appendix A.



Accuracy and range, description of the apparatus, the form of specimen, procedures to be followed and the necessary calculation for determination over a frequency range of 1 kHz to 100 kHz. Precautions are given for extending the range to 1 MHz. Supplements the Hartshorn and Ward method of BS 2067.

Standard NumberBS 4542:1970
TitleMethod for determination of loss tangent and permittivity of electrical insulating materials in sheet form (Lynch method)
StatusConfirmed
Publication Date1970-01-30
Related National Standard OfIEC 60250:1969
DescriptorsSheet materials, Test equipment, Electrical insulating materials, Dielectric measurement, Solid electrical insulating materials, Test specimens, Permittivity measurement, Electrical testing
ICS29.035.01 Insulating materials in general
CommitteeGEL/15
ISBN0 580 05985 5
PublisherBSI
Pages12



About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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