Page 83 - CITS - Electrician - Trade Practical
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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













                                                           66

                                    CITS : Power - Electrician & Wireman - Exercise 33
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