John, these are all good suggestions for what might be causing the failures (coil snubber, operating contacts under load, etc.) But have you done any post-mortem on the failed contactors to see how they actually failed?
Perhaps I missed it; but was it the coil or the contacts that failed? Are the contacts welded closed, or burned open? You may have to cut it open to see. Lee -- Excellence does not require perfection. -- Henry James -- Lee A. Hart https://www.sunrise-ev.com _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
