[Kevin Sevcik]

I assume this is for a shooter. How big and heavy of a wheel are you using, and what gearing are you using?

Also, it only working for a throw or two makes perfect sense. The breakers are thermal buildup sort of devices. If you look at the spec sheet, they're only guaranteed to trip at 135% overload. If you're operating between 54 and 40 amps, then the possible trip time is 6 seconds to infinity. So you might be drawing enough amps to make it trip after 15 seconds or more. Or you might be spiking it with 70 amps or something for a few tenths of a second, but the heat isn't dissipating, so it'll trip after a few of those spikes. It sounds to me like you're trying to drive too large a load with too much voltage, really. I know my team is planning on adjusting our maximum commanded PWM based on the RPMs of the CIM to keep from tripping the breaker.