ARMY TM 9-6115-666-13&P
AIR FORCE TO 35C2-3-505-1
(2) Increase frequency until SYNCHRONIZING LIGHTS (11) blink together one or more times per
(3) Decrease frequency until SYNCHRONIZING LIGHTS (11) blink together as slow as possible.
Lights should remain OFF for at least 5 to 6 seconds.
Check that load contactor at load is open before attempting to place generators on line.
Failure to observe this caution can result in damage to generator sets.
(4) When both SYNCHRONIZING LIGHTS (11) are dark, position and hold AC CIRCUIT
INTERRUPTER switch (4) of generator set in the CLOSED position until indicator light comes on.
SYNCHRONIZING LIGHTS (11) should go out indicating both generators are now operating in
h. Rotate VOLTAGE adjust potentiometer (2) of generator set until AC AMPERES meter (13) reads
j. Place OUTPUT circuit breaker(s) (CB1 through CB4) (9) to the ON (up) position. Corresponding
light(s) DS3 through DS6 should light. Generator is now supplying power to load.
If the REVERSE POWER indicator on the FAULT INDICATOR PANEL of either generator
set lights, and the AC circuit interrupter relay opens, open the load contactor at load and
resynchronize the generator sets (Repeat the necessary steps c through i).
k. Compare AC AMPERES meter (13) readings of both generator sets. Compare PERCENT POWER
meter (12) readings of both generator sets. If readings are not within 10 percent, proceed to step 1.
If readings are good proceed to step m.
l. Rotate FREQUENCY adjust potentiometer (3) of either generator set until readings are as close as
possible. If readings are not within 10 percent, notify next higher level of maintenance.
m. Close control panel access cover and secure with clamping catch.
n. Perform the PMCS listed as DURING in table 2-2.