Pleas ID this IBM system....

William Donzelli wdonzelli at
Wed Apr 17 10:18:29 CDT 2019

> Does the 3125 use a motor-generator set, like the larger
> models?  Do you have the right power to run the MG?  I know
> the MGs on the 3145 were oversized, so maybe the same unit
> could also run nthe 3158, and demanded an INSANE current
> surge when spinning up.  Also, the running current, even at
> idle, was pretty crazy, somewhere around 60 A at 208 V 3-phase.

No, the 3125 does not. Power consumption for a model 125 system is
actually not bad for a mainframe of the era.

Generally, big iron collectors are not to concerned about big copper.


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