Page 204 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

TASK 2: Run the synchronous motor as a constant speed motor

1 Vary the mechanical load from zero to rated load
2 Measure the speed at various loads
3 Tabulate the speeds and check for constant speeds

Sl. No Load current (A) Speed (rpm)

TASK 3: Run the synchronous motor as a synchronous condenser
1 Start and run the synchronous motor
2 Apply constant mechanical load

3 Apply a constant voltage
4 Vary the filed current
5 Note the power factor at various excitation currents
6 Tabulate the field current and power factor

7 plot inverted v curve
Sl.No Power factor Armature current

187

CITS : Power - Electrician & Wireman - Exercise 84