TM 11-6625-298-14
b. Measure the high- and low-voltage windings
considerably lower. Extremely low readings in-
dicate the presence of moisture in the oil and
separately. Connect a test lead from the LINE
indicate that the oil should be changed.
terminal of the ohmmeter, first to the low-voltage
windings and then to the high-voltage windings.
c. Measure between windings by connecting the
WARNING
GROUND lead from the ohmmeter to one winding
Discharge the capacitor after an insulation
of the transformer, and another test lead from the
resistance test has been made, or
LINE terminal of the ohmmeter to the other
disconnect the leads one at a time. Short
winding.
out the capacitor. Contact with a fully
charged capacitor can cause a dangerous
speed. Indications for all measurements should be
shock.
100 megohms or more on air core transformer.
Indications on oil-filled transformer will be
