Electrical properties of insulating materials under VLF voltage
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.
File Size: 3,9 MB
Pages NB: 6
You might also like
may download free of charge all publications including most recent ones
may download free of charge publications over three years old and purchase all publications
HOW TO ACCESS TO E-CIGRE?
Click here to read a short guide to setting up your account and obtaining access to the global e-cigre.org website for all technical literature.
Test strategy for Protection, Automation and Control (PAC) functions in a fully digital substation based on IEC 61850 applications
Voltage Source Converter (VSC) HVDC for Power Transmission - Economic Aspects and Comparison with other AC and DC Technologies
Update of Service Experience of HV Underground and Submarine Cable Systems
Recommendations for testing of long AC submarine cables with extruded insulation for system voltage above 30 (36) to 500 (550) kV (This TB replaces electra article ELT_189_1)