Gary: > ...Does anyone know of suitable DC rated switches (say 300+ VDC and 300A)? ...
I don't know of any switches that will take 330 V and 300A that are light. We use the Kilovac Bubba's for our Formula Lightning. The Czonka's were giving some of the teams problems by exploding at these currents a few years ago. The only problems that we have had with the Bubbas have been related to too many too fast pre-charge cycles (student accidents aren't always accidents :-)) burning the contacts and causing sometime sticks in the on. Even with that, it still is the safest disconnect that we could come up with. It is the only ne used by the teams that I am aware of although some may still be using czonkas. We do use anderson connectors at these voltages and currents. We have had no problems with them. The anderson connectors seem to add about 0.002 or less ohms per single connection. (We use a version by SMH.) The electric bus we have also uses anderson type connectors at 330 V and 600 Amps at no apparent problem. I would be a little concerned about the switches used in the S-10 although I have never measured it, I do have some concerns. It just feels rough :-) ...Roy Nutter
