By Topic

Effects of Cr content on the interruption ability of CuCr contact materials

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)
Wangpei Li ; Cutler-Hammer Inc., Horseheads, NY, USA ; Thomas, R.L. ; Smith, R.K.

The effects of Cr content in CuCr contact materials, especially on high current interruption, have mostly been examined in experimental chambers rather than in actual vacuum interrupters (VIs). Possible interactions of the contacts with their surroundings, both electromechanical and gaseous, may require commercial VIs for a more realistic test determination of the effects of Cr content on the overall performance. In this work, the Cr content in CuCr contacts is varied from 5 wt% to 75 wt% and tested in our 38-kV axial magnetic field (AMF) type VIs. The material properties of electrical conductivity, hardness and total VI resistance are measured as a function of the Cr content. AC and impulse voltage withstand capabilities are tested before and after short-circuit current interruption tests. Contact erosion behavior is examined with VIs subjected to only a half cycle arcing duty. Results show that for this particular AMF VI design, a 30 wt% Cr content gives the best current interruption performance

Published in:

Plasma Science, IEEE Transactions on  (Volume:29 ,  Issue: 5 )