has no low voltage protection and the motor may be damaged if the voltage drops below a certain level

incorporates low voltage release because the motor will stop when voltage falls below a certain value and automatically start when normal voltage resumes

incorporates low voltage protection because the motor will stop when voltage falls below a certain value but must be manually restarted when normal voltage resumes

incorporates low voltage protection because the motor will stop when voltage falls below a certain value and automatically start when normal voltage resumes