Protect from heavy load

Protect against high voltage

Allow for continuous over loading

Protect against dead short circuit

Universal motor

Permanent capacitor motor

3 Phase slip ring induction motor

3 Phase single squirrel cage induction motor

Slip increases torque decreases

Slip increases torque increases

Slip decreases torque increases

Slip decreases torque decreases

Vibration of shaft

Motor will not start

Runs in slow speed

Over heating of motor

Super enamelled copper wire

PVC covered copper winding wire

Single cotton covered copper wire

Double cotton covered copper wire