It sounds an alarm in no load conditions
It detects the overloading condition of motor
It reduce motor current during transient operation
It maintain the torque at low voltage conditions
Keep the stator flux maximum
Maintain the rotor current minimum
Maintain the speed of motor constant
Maintain the rated torque at all speeds
Cyclo converters
Frequency multiplier
Phase sequence indicator
Servo controlled voltage stabilizer
Opto coupler
Speed sensing
Photo voltaic cell
Resistance temperature detector
Rolling machine
Air Compressor
Shearing machine
Heavy duty electric drilling machine