ARMY TM 9-6115-641-24
AIR FORCE TO 35C2-3-456-12
4-5-2. Testing.
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
Remove current transformer, paragraph 4-5-1.
Set multimeter for ohms and check for continuity between secondary terminals A1 and A2, B1 and B2, and
C1 and C2.
If continuity is present, continue with test. If continuity is not present, current transformer is defective and must
be replaced.
Set up a test circuit using 10 gauge wire as shown in Figure 4-12. Make ten passes with wire through phase
A window.
Turn on power source and load bank. Adjust load bank until 18.4 amps is indicated on ammeter.
Set multimeter for amperes, and connect to secondary terminals A1 and A2. Multimeter indication must be 0.9
to 1.1 amps.
Repeat steps d, e, and f using phase window B and secondary terminals B1 and B2.
Repeat steps d, e, and f using phase C window and secondary terminals C1 and C2.
Replace current transformer if multimeter indication in any phase is other than stated in step f.
Install current transformer, paragraph 4–5–3.
Figure 4-12. Testing Current Transformer
CAUTION
When installing current transformer use extreme care not to drop attaching hard-
ware onto generator unit. Serious damage to equipment could result.
4-5-3.
InstaIlation.
a.
Install current transformer (20, Figure 4–11) with screws (17), washers (18), and nuts (19).
b. Wrap main power cables around current transformer (20) as noted on removal.
c.
Connect main power cables to front side of terminal board (16) and remove tags.
d.
Connect electrical leads to current transformer (20) secondary terminals and remove tags.
e.
Install control box assembly, paragraph 2-21–4.
f.
Connect negative battery cable. Close left side engine access door.
4-15
