8 Sep
2021
8 Sep
'21
8:25 a.m.
As long as you don't need the full blower capacity, you can probably do
the 3-phase-to-single-phase trick by using a capacitor from the third
lead to either (which one will determine rotation direction) of the two
other leads and feeding those leads with single-phase. It's done very
often here with 3-phase shop equipment acquired by residential
hobbyists. For motors, it's not critical, but it's not something that
you'd want to do for electronics--the phase distortion rules that out.
--Chuck
On 9/7/21 11:31 PM, Curious Marc wrote:
Yes, we are hoping that we can power the ?blower with
3 phase and the
rest directly from the 240V electric car circuit? Not sure if that can
be rewired for that.
Marc
> On Sep 6, 2021, at 6:50 AM, Patrick Finnegan <pat at vax11.net> wrote:
>
> ?
> On Mon, Sep 6, 2021, 06:36 Curious Marc via cctalk
> <cctalk at classiccmp.org <mailto: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
>
>
--
--Chuck
Sent from my digital computer