starters are the most common starters used widely to start AC motor in these starters the starting current is controlled by applying reduced voltage, achieved by connecting motor winding in "Star" mode. Theoratically the current is reduced by a factor of times and once th emotor attains it's normal running stage, full voltage is applied to the motor by changing the connection to "Delta" mode and remains in the same stage till the motor is stopped.
Over Voltage
Under Voltage
Over Load
Short Circuit
Phase Failure
Contractor
Pump Protective Relay
CT Coil
Timer
On/Off Push Button
MCB/Load breaking switch
Ammeter
Voltmeter
Run-Hour meter (optional)
Selector switch
Indicator Lamp
Powder Coated MS Box with lock & Key
Hand Selector Switch
The Operation of the start-delta method is simple and rugged
It is relatively cheap compared to other reduced voltage methods.
Good Torque/Current Performance.
It draws 2 times the starting current of the full load ampere of the motor connected
Manual/Auto Operation
Optional Control Circuit Voltages