ARMY TM 9-6115-672-14
AIR FORCE TO 35C2-3-444-32
MARINE CORPS TM 09244A/09245A-14
5-34
(12) Connect negative battery cable to battery, and close BATTERY ACCESS door.
5.8.4
Current Transformer CT1, CT2, CT3.
a. Removal.
(1)
Shut down generator set, paragraph 2.11.2.
(2)
Open BATTERY ACCESS door (Figure 1-2), and disconnect negative battery cable.
(3)
Remove DCS control box assembly, paragraph 4.8.1.
(4)
Remove output box top panel, paragraph 5.8.1.
(5)
Open output box and right side engine compartment access doors (Figure 1-2).
(6)
Tag and disconnect electrical leads from current transformer (4, Figure 5-4).
(7)
Tag and disconnect main generator cables T2 and T8 from voltage reconnection board (34).
NOTE
Record number and direction of wraps when removing main generator cables
from transformer for installation later.
(8)
Unwrap main generator cables from droop current transformer (7) and current transformer (4).
(9)
Remove locknuts (1), screws (2), washers (3), and current transformer (4) from rear panel (33).
b. Testing.
(1)
Remove current transformer, refer to paragraph 5.8.4.a.
(2)
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.
(3)
Set up a test circuit using 10 gauge wire as shown in Figure 5-5. Make 10 passes with wire
through phase A window.
(4)
Turn on power source and load bank. Adjust load bank until 27.7 amps is indicated on ammeter.
(5)
Set multimeter for amperes, and connect to secondary terminals A1 and A2. Multimeter
indication must be 0.9 to 1.1 amps.
(6)
Repeat steps (3) through (5) using phase B window and secondary terminals B1 and B2.
(7)
Repeat steps (3) through (5) using phase C window and secondary terminals C1 and C2.
