TM 9-4940-549-14&P
Speed Adjustment for 60-Hertz AC Output. Adjust throttle control
c.
to give tachometer reading of 1,800 rpm.
NOTE
Engine governor will maintain adjusted
speed under various load conditions.
STOPPING THE ENGINE.
Refer to figure 2-7 and stop the engine.
OPERATION OF EQUIPMENT.
a.
Operation on Internal Power (Shop Set Equipment).
(1)
Place all circuit breakers and switches on the control panels in
the OFF position.
Start the engine (fig. 2-6).
(2)
(3)
Adjust the engine speed to the desired rpm (para. 2-3). The
engine should be operated at 1,800 rpm for 60-hertz current.
(4)
switch to 60 hertz.
Place the control circuit breaker (fig. 2-4) to ON position, and
(5)
press the dynamotor start switch, momentarily, to energize the
AC generator portion of the dynamotor-welder.
NOTE
With selector switch in GENERATOR po-
sition, the welder is driven in the
proper rotation. All sequences of
operation duplicate CITY position ex
cept 240-V EXTERNAL power receptacle
which is now output rather than input.
NOTE
AC output voltage adjustments may be
made with the AC voltage adjusting
rheostat (fig. 2-4). DC output ad-
justments may be made with the DC
ampere selector switch and DC ampere
adjusting rheostat (fig. 2-4).
(6)
After the operator performs steps 1 through 5, the synchronous
motor becomes an AC generator. Power is available at all ter-
minals and receptacles. The dynamotor-welder provides power
for welding.
