ARMY TM 9-6115-644-10
AIR FORCE TO 35C2-3-446-11
MARINE CORPS TM 09249A/09246A-10/1
Rotate both FREQUENCY adjust potentiometers to
obtain the same frequency indication on both sets.
Ensure load contactor at load is open.
Position and hold AC CIRCUIT INTERRUPTER
switch, on generator set No. 1, to CLOSED until
Place the UNIT-PARALLEL switch on both units in
If synchronizing lights on generator set No. 2
do not glow bright and dark in unison, the
phasing is wrong. Shut down generator sets
and check that load cables are connected prop-
erly. Failure to observe this caution can result
in damage to generator sets.
Observe synchronizing lights on generator set No.
2. The lights should be glowing bright and dark in
Adjust frequency of generator set No. 2 until syn-
chronizing lights glow bright and dark in unison at
2 to 3 second intervals.
Check that load contactor at load is open before
attempting to place generators on the line.
Failure to observe this caution can result in
damage to generator sets.
When both synchronizing lights are dark, position
and hold AC CIRCUIT INTERRUPTER switch of
generator set No. 2 to the CLOSED position until
The generator sets are now operating in parallel
with no load.
Rotate FREQUENCY adjust potentiometer of gen-
erator set No. 1 until kilowattmeter (PERCENT
POWER) indicates approximately O.
2-26 Change 1