Page 83 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

Tabular column:

Load current Terminal
Sl.No Field current (I ) Induced EMF (E ) Speed (RPM)
F 0 (I ) voltage (V )
L T

TASK 4 : Study the characteristics of DC compound Generator
1 Make the connections of Prime mover AC motor and DC compound Generator with voltmeter Ammeter as per
circuit diagram.
2 Check the connections, start the prime mover AC motor coupled to DC compound Generator and check
residual voltage recorded in the voltmeter.
3 Increase the field current in shunt field and build up the voltage in the 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.

Tabular column:

Load current Terminal
Sl.No Field current (I ) Induced EMF (E ) (I ) voltage (V ) Speed (RPM)
F
0
L
T

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CITS : Power - Electrician & Wireman - Exercise 33