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Wednesday, June 10, 2009
Reliabiliy of Curtis 1231 Controllers
After selling 1231C-8601 and 1231C-7701 Curtis controllers for more than 15 years, we have found the failure rate to be about 1-2% when using two contactors. The failure rate increases if only a single contactors is used per the Curtis schematic. (http://www.evamerica.com/page13.html)