🚀 go-pugleaf

      Synchronous motor-generators are very effective in blocking noise,
sags, spikes, lightning, and such.  They are widely used in mainframe
computer installations; some IBM and Cray machines run all the power
supplies on 400Hz, and use a M-G set to convert 60Hz to 400Hz.  

      My own experience with an M-G set was very satisfactory; we had
one in a UNIVAC installation in a heavy industrial R&D facility, and
experienced no power problems, even during electrical storms.  The
M-G set was a vertical-axis unit about 2.5' in diameter and 3' high.
It was a bit noisy, and was located in a nearby electrical switchgear
room, rather than in the computer room itself.  This unit provided
excellent isolation from such nearby sources of interference as arc welders,
magnetic-pulse presses, and locomotive-transmission test stands.

      Small M-G sets (a few KW) do exist; contact your local GE or
Westinghouse distributor.  It's quite reasonable to have one in any
installation large enough to have a real computer room.  They are much
cheaper than UPSs, and are very reliable; the technology of rotating
electrical machinery is well-developed.

					John Nagle