ARMY TM 9-6115-645-24
AIR FORCE TO 35C2-3-444-12
MARINE CORPS TM 09244A/09245A-24/2
d.
Remove output box top panel, paragraph 4-8.1, step I-
e.
Open output box and right side engine access doors.
f.
Tag and disconnect current transformer (31, FIGURE 4-5) electrical leads.
g.
Tag and disconnect main generator cables T2 and T8 from voltage reconnection board (18).
h.
Unwrap main generator cables from droop current transformer (34) and current transformer (31). Note
number and direction of wraps.
i.
Remove screws (29), flat washers (30), nuts (28), and current transformer (31) from output box.
FIGURE 4-6. Testing Current Transformer
4-11.2
Testing.
a.
Remove current transformer, paragraph 4-11.1.
b.
Set multimeter for ohms and check for continuity between secondary terminals Al and A2, B1 and B2, and C1
and C2.
c.
If continuity is present, continue with test. If continuity is not present, current transformer is defective and
must be replaced.
d.
Set up a test circuit using 10 gauge wire as shown in FIGURE 4-6. Make ten passes with wire through phase
A window.
e.
Turn on power source and load bank Adjust load bank until 27.7 amps is indicated on ammeter.
f.
Set multimeter for amperes, and connect to secondary terminals Al and A2. Multimeter indication must be
0.9 to 1.1 amps.
g.
Repeat steps d., e., and f. using phase window B and secondary terminals B1 and B2.
h.
Repeat steps d., e., and f. using phase C window and secondary terminals C1 and C2.
i.
Replace current transformer if multimeter indication in any phase is other than stated in step f
j.
Remove current transformer from test circuit.
k.
Install current transformer, paragraph 4-11.3.
4-11.3
Installation.
a.
Install current transformer (31, FIGURE 4-5) with screws (29), flat washers (30), and nuts (28).
b.
Wrap main generator cables around current transformer (31) and droop current transformer (34) using same
number of wraps noted during removal.
c.
Connect main generator cables to voltage reconnection board (18) and remove tags.
d.
Connect electrical leads to current transformer (31) and remove tags.
e.
Close output box and right side engine access doors.
4-18 Change 2
