84 MEASURING INSULATION RESISTANCE
Use a “Dr. Robin”generator tester in megger tester
;
mode or use a megger tester to check the insu-
lation resistance. Connect a megger tester to one
of receptacle output terminals and the ground ter-
minal, then measure the insulation resistance. An
insulation resistance of 1 megohm or more is
normal. (The original insulation resistance at the
time of shipment from the factory is 10 megohm
or more.)
If it is less than 1 megohm, disassemble the I
generator and measure the insulation resistance of
the stator, rotor and control panel individually.
Fig. 8-10
l
STATOR
(1) Measure the insulation resistance between
BROWN lead and the core.
(2) Measure the insulation resistance between
YELLOW lead and the core.
(3) Measure the insulation resistance between
BLACK lead and the core.
l
ROTOR
Measure the insulation across one of the soldered
terminals of the rotor and the core.
Fig. 8-i 1
Fig. 8-12
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