On Mon, Sep 6, 2021, 06:36 Curious Marc via cctalk <[email protected]> wrote:
> I got both the 3420s and the 3808 from Sellam. On the restoration docket, > now with a better chance thanks to the ALDs which I recently got from > Gabriel himself. I scanned my 3420 ALDs and gave them to Gabriel in return. > Biggest annoyance, besides humongous size and weight, is the amount of 3 > phase power required. > >From what I remember, the only thing that requires 3 phase in the whole system is the blower motor in the 3420 drives. The rest are powered off of single phase 200-240VAC. The large 3 phase input on it 3803 is likely overkill for even a controller and full string of 8 drives. It's easier to oversize things and have a 3x safety margin, then deal with running close to the limits and risk any problems from poorly installed site wiring. Pat >
