Improve the short circuit making current of the Load Break Switch

Message from Jimmy Wong K.M.

Hi, we are involved in designing of M.V, switchgear. We frequently use silver-plated copper contacts, silver plated chromium-copper contacts, tungsten-copper contacts, etc for the contacts of the Load Break Switch. I wish to know what is the best combination of different alloys with copper that will produce the following results:

1. Increase its making current capacity tremendous, instead of passing through the making current test of 50kA one time, it could pass through 3 times.

2. Increase its mechanical durability, e.g. instead of passing through its 1000 times mechanical switching test without affecting its electrical performance, it could pass through 5,000 times.