[rescue] 3-phase power, was: argh, what did I do? (Onyx)
mcguire at neurotica.com
Wed Jan 15 22:04:14 CST 2003
On Wednesday, January 15, 2003, at 03:34 PM, vance at neurotica.com wrote:
>> Yes, that is possible. The VAX 6k has a 320 V DC power rail that is
>> from a three phase rectifier. This makes a rather smooth DC voltage
>> AC even without smothing capacitors. The actual PSUs are feed from
>> DC rail. It is easy to rewire the machine to work with 230 V single
>> phase. You loose the nice three phase rectifier factor, but it still
>> works. AFAIK you have to do a litle bit to fool the AC-OK detection.
> I just fed split-phase to two of the lives (and neutral to the
> neutral) to
> my DECsystem 5840, and it worked without any monkey-business.
Really? I wonder if this approach would work with the VAX 7000. It
rectifies 3-phase AC to a 300V rail too, does it not? I think I recall
Bob Keys having said that on port-vax at one point. Can anyone confirm?
Dave McGuire "She's a cheek pincher. I have scars."
St. Petersburg, FL -Gary Nichols
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