ARMY TM 9-6115-645-24
AIR FORCE TO 35C2-3-444-12
MARINE CORPS TM 09244A/09245A-24/2
f.
Install output box top panel, paragraph 4-8.2, step j
g.
Install control box assembly, paragraph 2-19.4.
h.
Connect negative battery cable. Close battery access door.
4-12
DROOP CURRENT TRANSFORMER.
4-12.1
Removal.
a.
Shut down generator set.
b.
Open battery access door and disconnect negative battery cable.
c.
Open output box and right side engine access doors.
d.
Tag and disconnect main generator cables T2 and T8 from voltage reconnection board (18, FIGURE 4-5).
e.
Unwrap main generator cables T2 and T8 from droop current transformer (34). Note number and direction of
wraps.
f.
Tag and disconnect droop current transformer (34) electrical leads from terminal board (25).
g.
Remove screws (33), nuts (32) and droop current transformer (34) from output box.
4-12.2
Testing.
a.
Remove droop current transformer, paragraph 4-12.1.
b.
Set multimeter for ohms and check for continuity between secondary leads 1 and 2.
c.
If continuity is present, continue with test. If continuity is not present, droop current transformer is defective
and must be replaced.
d.
Set up a test circuit using 10 gauge wire as shown in FIGURE 4-7. Make ten passes with wire through
window of droop current transformer.
e.
Turn on power supply and load bank. Adjust load bank until 20.8 amps is indicated on AC ammeter.
f.
Set multimeter for AC amperes and connect to secondary leads 1 and 2. Multimeter indication must be
between 0.9 and 1.1 amps.
g.
Replace droop current transformer if multimeter indication is other than above.
h.
Remove droop current transformer from test circuit.
i.
Install droop current transformer, paragraph 4-12.3.
FIGURE 4-7. Testing Droop Current Transformer
4-12.3
Installation.
a.
Install droop current transformer (34, FIGURE 4-5) in output box with screws (33) and nuts (34).
b.
Wrap main generator cables around droop current transformer (34) using the same number of wraps noted
during removal.
c.
Connect main generator cables to voltage reconnection board (18) and remove tags.
d.
Connect droop current transformer (34) electrical leads to terminal board (25) and remove tags.
e.
Close output box and engine access doors.
Change 2 4-19
