84
MEASURING INSULATION RESISTANCE
Use
a
"Dr.
Robinngenerator tester in megger tester
mode
or
use
a
megger tester to check the insula-
tion 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 nor-
mal. (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 generator and measure the insulation resis-
tance of the stator, rotor and control panel indi-
vidually.
*
STATOR
(1)
Measure the insulation resistance between
BLUE
lead and the core.
(2)
Measure the insulation resistance between
WHITE
lead and the core.
(3)
Measure the insulation resistance between
YELLOW lead and the core.
(4)
Measure the insulation resistance between
BROWN lead and the core.
ROTOR
Measure the insulation across one
of
the soldered
terminals
of
the rotor andthe
core.
I
I
i
U'
i
Fig.
8-11
~
Fig.
8-12
-
22-
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