Correct option is C
· The diagram indicates the relationship between the resistances and reactance of the main and auxiliary windings, typically showing ) Ra/Xa > Rm/Xm
· This means that the auxiliary winding has a higher resistance-to-reactance ratio compared to the main winding, contributing to the phase shift necessary for starting torque.
Motor characteristics:
· The starting torque of a resistance-start induction motor is about 1.5 times -full load torque.
· The maximum or pull-out torque is about 2.5 times full-load torque at about 75 percent of synchronous speed.
· The split-phase motor has a High starting current which is usually 7 to 8 times the full-load value.
Applications:
· Split-phase motors are cheap and they are most suitable for easily started loads where frequency of starting is limited.
· The common applications are washing machines, air-conditioning fans, food mixers, grinders, floor polishers, blowers, centrifugal pumps, small drills, lathes, office machinery, dairy machinery, etc.
· because of low starting torques, they are seldom used for drives requiring more than 1 kW.
