Page 82 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

Tabular column:

Terminal voltage
Sl.No Induced EMF (E0) I = I = I Speed (RPM)
A F L (V )
T

TASK 3 : Study the characteristics of DC Shunt Generator
1 Make the connections of Prime mover AC motor and DC shunt Generator with voltmeter Ammeter as per
circuit diagram.
2 Check the connections, start the prime mover AC motor coupled to DC shunt Generator and check residual
voltage recorded in the voltmeter.
3 Increase the field current in shunt field and build up the voltage in DC shunt generator. Record the rated
induced voltage and field current.
4 Now, connect the lamp load across the generator terminals through DPST switch, and increase the load
gradually up to rated current of Generator.
5 Record the full load current and terminal voltage.
6 Reduce the load gradually, switch OFF the load switch and stop the prime mover motor.
7 Plot the characteristics graph of generator.

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CITS : Power - Electrician & Wireman - Exercise 33