By Topic

New very low frequency methods for testing extruded cables

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Kruger, M. ; BAUR Pruf und Messtech., Sulz, Austria ; Feurstein, R. ; Filz, A.

A novel digital instrument has been developed for loss-factor measurement. It is program controlled, easy to operate, and has a measurement resolution of tan δ-0.1 Hz=0.01%. The loss angle is determined by a range measurement of crossovers of current and voltage. At 0.1 Hz tan δ has a considerably larger dynamic than at 50 Hz; for this reason tan δ-0.1 Hz is especially suitable for diagnostics of the operational efficiency of plastic cables. Measurements on naturally aged cables showed that there is a definite correlation between increased tan δ-0.1 Hz and reduced breakdown voltage. The tan δ-0.1 Hz measurement carried out at a nominal voltage U0 allows nondestructive evaluation if the cable has been damaged by long water trees. With a 0.1-Hz test at 3U 0 for approximately 1 h, serious weak points can be detected in the plastic insulation

Published in:

Electrical Insulation, 1990., Conference Record of the 1990 IEEE International Symposium on

Date of Conference:

3-6 Jun 1990