TM 9-6115-668-13
f. Adjust undervoltage:
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 VOLTAGE ADJUST potentiometer (R3) all the way counterclockwise (0). Lock control knob
with lever.
Use Volt. adj. potentiometer (figure 5-28) to set voltage on multimeter to 175 V.
Turn VOLTAGE ADJUST potentiometer (R3) five turns clockwise. Lock control knob with lever.
Turn Umin potentiometer clockwise until UNDER/OVER VOLTAGE indicator (H9) lights up.
Turn VOLTAGE ADJUST potentiometer (R3) five turns clockwise. Lock control knob with lever.
Press UNDER/OVER VOLTAGE illuminated pushbutton switch (S5); UNDER/OVER VOLTAGE
indicator (H9) goes out.
Shut down Generator Set 150 kW as instructed in paragraph 2.5.2.
On relay K5, connect cable to terminal 1.
Start up Generator Set 150 kW as instructed in paragraph 2.5.1.
Turn VOLTAGE ADJUST potentiometer (R3) counterclockwise and check that UNDER/OVER
VOLTAGE indicator (H9) lights up and Generator Set 150 kW shuts down.
g. Adjust setpoint:
Start up Generator Set 150 kW as instructed in paragraph 2.5.1.
Turn VOLTAGE ADJUST potentiometer (R3) all the way clockwise (10). Lock control knob with
lever.
Use Volt. adj. potentiometer (figure 5-28) to set voltage on multimeter to 230 V.
Turn VOLTAGE ADJUST potentiometer (R3) counterclockwise and set voltage to 208 V.
Lock control knob with lever.
Shut down Generator Set 150 kW as instructed in paragraph 2.5.2.
Disconnect connectors of multimeter from terminals of VOLTAGE meter (P6).
h. Adjust over-frequency:
On relay K5 (34, figure 5-19), disconnect cable from terminal 1.
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 knob
with lever. Use SPD IN potentiometer of speed governor assembly N1 (figure 5-28) to set a fre-
quency of 435 Hz on
FREQUENCY meter (P5).
Use FREQUENCY ADJUST potentiometer (R4) to set a frequency of 430 Hz on FREQUENCY
meter (P5).
Lock control knob with lever.
Turn fmax potentiometer (figure 5-30) counterclockwise until UNDER/OVER FREQUENCY (H8)
indicator lights up.
Shut down Generator Set 150 kW as instructed in paragraph 2.5.2.
On relay K5, disconnect cable from terminal 1.
Turn FREQUENCY ADJUST potentiometer (R4) five turns counterclockwise. Lock control knob
with lever.
i. Press UNDER/OVER FREQUENCY illuminated pushbutton switch (S4): UNDER/OVER FRE-
QUENCY indicator (H8) goes out.
Start up Generator Set 150 kW as instructed in paragraph 2.5.1.
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