Abstract:

The welding technology of electric contacts of Emax series air circuit breakers welded with BAg15CuP brazing filler metal is studied,and the welding performance is compared with that of BAg40CuZnCd brazing filler metal.By the metallographic analysis,the optimal welding technology of BAg15CuP brazing filler metal in the electric contacts of high current air circuit breakers is obtained,and the appropriate high-frequency induction welding coil is researched.The technology improvement of high-frequency induction brazing of high current air circuit breaker electric contacts is successfully completed.

Key words: contacts, pure copper terminal, brazing filler metal, technology parameters, high frequency, induction welding