I have been buying tips for the obsolete Cutler Hammer contactors that we have and now I'm starting to question the tips I am buying.

What kind of contactor tips are better? The solid copper tips or the silver coated tips?

As for the silver coated tips, are they pure silver or some kind of silvery mixture of metals?

We seem to go through alot of these and I'm not sure it is the high current or if the wrong tip has something to do with it.

Thanks!

Does anyone have experience troubleshooting vintage Shepard Niles Cranes. When I say vintage, I'm talking 1960's and 1970's with Cutler Hammer contactors and controls. The crane in question is fed by DC so the entire system is good ol' direct current.

I'm getting excessive arcing on the main contactors but I haven't found anything obvious. We are going through contactor tips like crazy. I think they are 100 or 200 amp contact tips.

It seems like I endure a never-ending battle of Shepard Niles Crane electrical problems. Incidently, it looks like the whole cabinet is Cutler Hammer controls.