Copper or silver? How to choose reliable wind-turbine brushes

By Michelle Froese Written by: Chris Richards
Sales and Marketing Director, BGB
This wind-turbine slip ring suffered irreparable damage because of excessive copper brush wear.
Brushes are a small but integral part of a wind turbine. A brush is an electrical conductor that works with slip rings and brush holders, protecting vital components from parasitic currents and static electricity. Worn or low-quality brushes can wear on a slip ring, causing it to degrade prematurely or force early component replacement.
Although copper brushes are widely used in the wind industry, turbine manufacturers and operators are reconsidering the use of silver brushes. Copper has typically been the metal of

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