If you are repeatedly tripping breakers, you really need to monitor the current of the supply the breakers are protecting, this can be done with a simple clamp-on ammeter that can attach to an ordinary DMM.
If they will not reset even before the contactor is energized, it implies thermal overloads, rather than electronic type.
If the current is normal, then you may want to consider modern contactors and O/L's if these are of the older type.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.