Scheduled System Maintenance:
On Monday, April 27th, IEEE Xplore will undergo scheduled maintenance from 1:00 PM - 3:00 PM ET (17:00 - 19:00 UTC). No interruption in service is anticipated.
By Topic

Investigation on Erosion of Cu/W Contacts in High-Voltage Circuit Breakers

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

5 Author(s)
Tepper, J. ; High-Voltage Syst. Group, ABB Corp. Res., Baden-Dattwil ; Seeger, M. ; Votteler, T. ; Behrens, V.
more authors

The prediction and understanding of the erosion process of the Cu/W arcing contacts in high-voltage circuit breakers is important for the improvement of the breaker lifetime. The change of the contact geometry due to erosion is a main factor, which influences the lifetime. It is known that the ablation of contact material depends at least on parameters like the arcing current-amplitude, arcing time, total charge, and contact material properties. Based on experimental results, a method for an improved prediction of the erosion was derived. The experiments have been carried out in a SF6 self-blast circuit breaker test device with commercial high-voltage circuit breaker contacts at a current amplitude up to 45kA RMS and arcing time up to 17ms. From the power balance at the electrodes, the material erosion due to evaporation is calculated. The resulting erosion rates are in good agreement to the experimental results and explain that the specific erosion scales with current, polarity, and the arcing time. This indicates that erosion in this range of arcing stress occurs mainly due to evaporation of contact material and less to emission of droplets

Published in:

Components and Packaging Technologies, IEEE Transactions on  (Volume:29 ,  Issue: 3 )