tis 2015-12-22 klockan 16:45 +1300 skrev Mike Ross:

Finagle's law says 90% of my 3-phase big iron was acquired in the USA
and expects 3-phase 60Hz 208V... :-(
Many machines which did NOT have a ferroresonant transformer could be run from 50 or 60 Hz with no problem. The one place it was a problem would be getting the disk spindles turning at the right speed. Matching the available voltage would be the other detail, but a standard voltage adjusting transformer would do it fairly simply.

But, the ferroresonant transformers needed the right frequency.

Jon

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