15 Jul
2021
15 Jul
'21
1:22 p.m.
On Jul 15, 2021, at 4:19 PM, Michael Thompson via
cctech <cctech at classiccmp.org> wrote:
Interesting. I distinctly remember a disk drive installation manual that warned about
phase order. Perhaps that was for the RP04 and not the RP05/6 ?
paul
From: Paul Koning <paulkoning at comcast.net>
To: Chris Zach <cz at alembic.crystel.com>, "cctalk at classiccmp.org"
<cctalk at classiccmp.org>
Subject: Re: Looking for VAX6000 items
A number of the large disk drives use 3 phase motors; RP04/5/6 are
examples as well.
Three phase motors won't run on single phase power without help from run
capacitors. (There is no such thing as "two phase power" -- 220 volts is
single phase, balanced.)
paul
The RP06 uses 220VAC single phase motors for the spindle and blower.