TM5-6115-634-14&P
NAVFAC P-8-647-14&P
T0-35C2-3-445-14
TM-6115-14&P/1
5-23.
MAINTENANCE OF CURRENT TRANSFORMER ASSEMBLIES (cont)
TESTING
TEST TRANSFORMER ASSEMBLIES.
a.
Test current boost transformer
as follows:
(1) Use an ohmmeter to test
for 0.19 ohms between A1
and A2, B1 and B2, C1 and
C2.
(2) Apply 7 Vac 60 Hz to sec-
ondary winding.
Exciter
current should be 75
milliamperes maximum.
(3) Replace the transformer if
test steps (1) or (2)
above failed.
b.
Test instrumentation trans-
former as follows:
(1) Use an ohmmeter to test
for 0.11 ohms between
terminals A1 and A3, B1
and B2, C1 and C2.
(2) Apply 10 Vac 60 Hz to sec-
ondary winding.
Exciter
current should be 50
milliamperes maximum.
(3) Replace transformer if
test steps b. (1) or (2)
failed.
c.
Test cross-current compensation
transformer as follows:
(1) Use an ohmmeter to test
for 0.3 ohms between ter-
minals A1 and A2.
(2) Apply 10 Vac 60 Hz to
secondary winding.
Exci-
ter current should be 50
milliamperes maximum.
5-39
