Thanks everyone! I understood the Ir settings of the breaker but I am still confused about the Im. When a motor is first energized there is a very large inrush current that last for a very short time. This inrush current is very large compared to the FLC of the motor. I think 6x or around there. Am I correct to say that if you are using an adjustable thermal/magnetic breaker for protection of a motor you should set the Im to at least 6X the FLC of the motor?
