Oversized overcurrent doesn't burn out motors and overcurrent protection doesn't protect against overload. Overcurrent protection on a motor (or compressor) protects the wires if there is a failure on the circuit. The overcurrent will trip if the motor is locked but the motor has to be locked first.
I call bs on the oversized overcurrent burning out the motor. I say the locked compressor tripped the breaker. It's the A/C guy's fault.
