Hobart 9OC24S Operation Manual page 85

GENERATOR DIVISION
HOBART BROTHERS COMPANY
OPERATION, MAINTENANCE , AND OVERHAUL MAN UAL, TM-240A
SELF-PROPELLED GENERATOR SET, SPEC. NO. 5381A
(2) Set the manual voltage control rheostat (31) near its mid-range position.
H. Power Delivery (Manual Voltage Control)
Power delivery using manual voltage control is the same as automatic delivery
(Para. F, 1 thru 6, above) except:
t (1) Control generator output voltage by adjusting the rheostat (31) to maintain
a steady 115-V AC reading on the voltmeter (30). Turn the rheostat (31)
knob CLOCKWISE to INCREASE voltage and COUNTERCLOCKWISE to
DECREASE voltage.
(2) Adjust voltage to 115 V AC.
(3) During manual power delivery the operator must remain with the generator
set to adjust output voltage for varying loads and conditions.
I.
Discontinue Power Delivery
(1) Place the load contactor switch (17) in OFF position. Green light (12) should
go OFF immediately to indicate that the load contactor has opened and power
is no longer being de livered to the aircraft.
(2) Disconnect output cable at aircraft. Stow cable and place plug connector
in plug box.
WARNING: NEVER DISCONNECT THE OUTPUT CABLE WHILE
POWER IS BEING DELIVERED.
(3) Place operating mode switch (20) in DRIVE position to allow engine to
idle.
NOTE: If the engine is stopped without first placing switch (20) in DRIVE
position, an underfrequency fault may be indicated at the next
"start-up".
J. Stopping the Engine
(1) Allow the engine to idle a few minutes before stopping, to permit cooling .
(2) To stop the engine, place engine control switch (2) in STOP position.
4. Operating Transformer-Rectifiers (Optional Equipment) (See Fig. 4)
Refer to Chapter 8 for detailed information and instructions for Transformer-Rectifiers.
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