Hobart 9OC24S Operation Manual page 89

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HOBART BROTHERS COMPANY
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OPERATION, MAINTENANCE, AND OVERHAUL MANUAL, TM-240A
SELF-PROPELLED GENERATOR SET, SPEC. NO. 5381A
D .
112-V DC Power De livery
(1)
(2)
(3)
(4)
(5)
(6)
Be sure T-R (transformer-rectifier) contactor control switch (7, Fig. 7) is in
OFF position.
Connect DC output cable plug to aircraft receptacle connector. Be sure a good
connection is made.
WARNING: DO NOT CLOSE THE 400-HZ OUTPUT LOAD CONTACTOR.
If illumination is required, turn instrument light ON with switch (10, Fig. 7).
Close the load contactor to deliver power to output cables by momentarily
holding contactor control switch (7) in top ON position until green light (6)
glows. Release switch and allow it to return to center ON position.
Check to be certain fans are running.
Observe voltmeter (3) and ammeter (5). Under loaded conditions the voltmeter
should indicate approximately 100 V DC. The T-R should be loaded to no
more than 400 A for continuous operation. The 112-V DC T-R does not have
current-limiting, nor line-drop capability.
Remember that an overload, overvoltage, or overheating will cause the load
contactor to disconnect the load and turn OFF the green indicating light
(6, Fig. 7).
If "shut-down" occurs, check for condition that caused "shut-down"
and remedy before restarting the T-R.
E:
Stop 112-V DC Power Delivery
(1) Place contactor control switch (7, Fig. 7) in OFF position.
(2) Disconnect output cable at aircraft.
Stow cable and place plug connector in
plug box.
WARNING: DO NOT DISCONNECT CABLE WHILE POWER IS ON.
5. Operating the Test Box
The test box is useful and convenient in testing the generator set after repair or overhaul
and also in trouble shooting. To operate the test box proceed as follows:
A. Remove test connector cover. Connect the test box plug connector (Ref. l-l,
Fig. 11, item 3) to the test receptacle connector, Figure 9.