6 Sep
2021
6 Sep
'21
6:50 a.m.
On Mon, Sep 6, 2021, 06:36 Curious Marc via cctalk <cctalk at classiccmp.org 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