When installing an electric motor, the ideal is that a protective system is followed which aims to protect the electric motor.
The power network where the electric motor is installed must be against occasional short circuit in the electric motor, as this will ensure that in case of short circuit, the electric motor does not suffer from this problem.
The electric motor can not also suffer from excessive heat, as this may cause the electric motor to burn or premature shortening the life of the electric motor.
To protect the short circuit electric motor is important to make use of fuses that are delayed action because they protect the electric motor efficiently and cost is very low.
The magnetic circuit breakers also protect the electric motor short circuit, but they have a higher cost, they are resettable and need not be replaced.