Based on some of the responses, I wanted to provide a more thorough description of the circuit. The circuit operates a chilled water pump motor with a Size 2 starter. The circuit originates in a MCC, it is tapped off the 480 VAC power feed, the control circuit then leaves the MCC to a rheostat, then to a pushbutton station to start and stop the pump. There are no fuses for the 480 VAC control circuit voltage, so the only protection is the power conductor fuses for the motor. The motor coil failed and began smoking and did not blow the power fuses. The MCC was de-energized to stop any further damage. The motor starter will have to be replaced, so the addition of a control transformer to lower the control voltage would not be that more work. In addition, we as a facility were not aware that the control circuit was 480 VAC. At this facility we require an arc flash analysis to be performed for all 480 VAC applications, otherwise we are not allowed to operate the equipment. I would appreciate any additional comments on this based on the additional information. If there is any other questions please let me know. Thanks.