I am looking at an application with MV motors that do not have overload relays and only have fues located in the contactor for protection of the motor. It looks like 430.32 requires seperate overload protection for the motor for all continuous duty motors. However 430.33 states that for any non-continuous duty motors the short circuit protective device per 430.52 is allowed to be used for the motor overload protection.
This particular application is for MV compressor motors. Would compressor motors be considered non-continuous such that they would not require seperate overload protection per 430.33 thus allowing the fuses to be used as the motor overload protection?
This particular application is for MV compressor motors. Would compressor motors be considered non-continuous such that they would not require seperate overload protection per 430.33 thus allowing the fuses to be used as the motor overload protection?