Just to add some more information.....
At another well site, 1 well motor same size as above, along with 2 " booster pumps", are backed up via the same type of system. Same brand transfer switch, same programming on the plc.
BUT...the starters are VERY old, Clark Controllers. ( i'd say about 50 years old) And when they retransfer, none of the motors, even the 200hp motor gets bumped offline. I think the starters on the old system are not sensitive to the voltage fluctuation.
Im in the process of trying to dig up info on the soft start Westinghouse controllers, to see what can be done.
HP
