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Is there a data bulletin or manual available for the 8808 Econopak Wound Rotor Controllers?

See attachment. This device was a variable speed controller used on wound rotor motors from 50 to 2250hp and 240 to 4160vac.  A small fixed resistance was installed in the secondary of the motor (typically for starting characteristics) but then SCRs where used to change the motor`s secondary characteristics (i.e., vary the secondary impedance).  Also, the secondary was tied back to the line (via SCRs and a transformer) to provide regenerative breaking.  

These devices are obsolete and there is no support for them.  The application and customer requirements should be reviewed to determine if either a current production low or medium voltage adjustable speed drive or reduced voltage starter may be a suitable replacement.



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