TM 9-6115-668-13Turn FREQUENCY ADJUST potentiometer (R3) counterclockwise and press UNDER/OVERVOLTAGEilluminated pushbutton switch (S4): UNDER/OVER VOLTAGE indicator (H8) goes out.j. Adjust underfrequency:On relay K5 (41, figure 5-19), disconnect cable from terminal 1.Start up Generator Set 150 kW as instructed in paragraph 2.51.Turn FREQUENCY ADJUST potentiometer (R4) all the way counterclockwise (0). Lock controlknob with lever.Use SPD IN potentiometer of speed governor assembly N1 (figure 5-28) to set a frequency of365 Hz onFREQUENCY meter (P5).Use FREQUENCY ADJUST potentiometer (R4) to set a frequency of 370 Hz on FREQUENCYmeter (P5).Lock control knob with lever.Turn fmin potentiometer clockwise until UNDER/OVER FREQUENCY indicator (H8) lights up.Shut down Generator Set 150 kW as instructed in paragraph 2.5.2.On relay K5, connect cable to terminal 1.Turn FREQUENCY ADJUST potentiometer (R4) five turns clockwise. Lock control knob withlever.Press UNDER/OVER FREQUENCY illuminated pushbutton switch (S4): UNDER/OVER FRE-QUENCY indicator (S4) goes out.Start up Generator Set 150 kW as instructed in paragraph 2.5.1.Turn FREQUENCY ADJUST potentiometer (R4) counterclockwise and check that UNDER/OVER FREQUENCY (H8) indicator lights up and Generator Set 150 kW shuts down.Turn FREQUENCY ADJUST potentiometer (R4) clockwise and press UNDER/OVER FRE-QUENCY illuminated pushbutton switch (H8): UNDER/OVER FREQUENCY indicator (H8) goesout.k. Adjust setpoint:Start up Generator Set 150 kW as instructed in paragraph 2.5.1.Turn FREQUENCY ADJUST potentiometer (R4) all the way clockwise (10). Lock control knobwith lever.Use SPD IN potentiometer of speed governor assembly N1 (figure 5-28) to set a frequency of416 Hz on FREQUENCY meter (P5).Use FREQUENCY ADJUST potentiometer (R3) to set a frequency of 400 Hz on FREQUENCYmeter (P5).Lock control knob with lever.Shut down Generator Set 150 kW as instructed in paragraph 2.5.2.5-133
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