12 Oct
2024
12 Oct
'24
9:03 p.m.
Hmm, I think the 40 years has expired, so I can tell the story of the MG
at NATO HQ... It had a two-ton flywheel, and a standby generator off a
side shaft that kicked in if commercial AC failed. Problem was, the
building was wired with incorrect phase colouring, so when they
installed it all the motors went backwards! U-Thant got in an elevator
for an upper floor and went down and hit the stops!
On 2024-10-12 15:47, Chuck Guzis via cctalk wrote:
On 10/12/24 11:54, Brent Hilpert via cctalk wrote:
.
--
Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU
Amateur Radio, the origin of the open-source concept!
Skype: TILBURY2591
> Another approach would be to substitute the
old psu by modern ones, possibly by DC-DC converters or switching powersupplies.
>
> Does someone have experience in the substitution of psus in the multiple KW range or
did this in the past?
I recall that one of the benefits of using an MG set (probably better
referred to as a rotary converter, or motor-alternator set) is the
ability to float though short term power glitches.
I remember summer employment at a drive-in movie theater during my
summers working as a projectionist. Power supply for the DC carbon arc
lamps was supplied by a 40 Hp MG set located in its own building. Such
things do generate a fair amount of noise.
Does this date me?
--Chuck