Summary

Very low frequency (VLF) AC voltage testing in the frequency range from 0.01 to 1 Hz is increasingly being used for both high voltage (Hi-Pot) acceptance and condition assessment of installed large capacitance power components, mainly due to the low amount of reactive power needed, allowing more compact test equipment compared to that at power frequency.

The main purpose of the CIGRE WG D1.48 was to review the present knowledge regarding the effects of VLF voltage testing on electrical properties and ageing mechanisms of high voltage insulation systems, aiming at facilitating development of valid methods and useful evaluation criteria for both acceptance and maintenance VLF-tests.

Additional informations

Publication type Electra
Reference ELT_302_6
Publication year 2019
Publisher CIGRE
Study committees Materials and emerging test techniques (D1)
Working groups WG D1.48
File size 4 MB
Pages number 6
Price for non member 20 €
Price for member Free

Authors

COTTON, RAHIMPOUR

Keywords

materials, emerging test techniques

Electrical properties of insulating materials under VLF voltage
Electrical properties of insulating materials under VLF voltage