6 Apr
2013
6 Apr
'13
12:17 a.m.
On Fri, Apr 5, 2013 at 6:36 PM, Dave McGuire <mcguire at neurotica.com> wrote:
I'm suggesting that they might be three-phase,
as they are in many other
large VAXen. (I've never worked on the innards of an 11/780 myself) As
you're likely aware, in some VAXen the ONLY three-phase component(s) is/are
the blowers.
When I installed a VAX 8530 in our small shop in the early 1990s (when it was
still a multi-thousand-dollar machine), it was our our only 3-phase box. ISTR
it was as you mention - the blower was 3 phase but each PSU ran from its
own leg with the load approximately balanced among them.
-ethan