[BC] 25 Hz AC in New Orleans

[DHultsman5@aol.com]

In a message dated 12/7/2006 3:30:50 PM Central Standard Time,  
rondcole at gmail.com writes:

The  large floodwater pumping stations in New Orleans still operate
on 25 Hz AC  power, and the city is debating whether to repair the
25 Hz equipment  damaged by Katrina, or to replace it with modern
60 Hz equipment.   This is a big undertaking, because the 25 Hz
stations provide nearly  two-thirds of New Orleans' floodwater
pumping  capacity.



9999999999999999999999999999
 
Some of these pumping stations go back to the later 1890's and early  1900's. 
  Do they use motor generators to covert the AC or Solid state  inverters to 
convert the frequency??
 
I saw some photographs of large motors on the screw pumps used down  there.  
I also saw  photo of something that looked like two motors  connected 
together, which may have been a motor-generator combination.
 
Dave