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8-4
MEASURING INSULATION RESISTANCE
Use a
"Dr.
Robin"
generator
tester
in
megger tester
mode
or
use
a megger tester to check
the
insula-
tion resistance. Remove the control panel,
and
disconnect
the
connector of
GREEN
lead
for
ground. Connect a megger
tester
to one of
re-
ceptacle
output
terminals and the ground termi-
nal, 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.
NOTE
:
Turn
on
the no-fuse breaker before
mea-
surement.
Fig.
8-10
STATOR
(1)
Measure
the
insulation resistance between
(2)
Measure the insulation resistance
between
(3)
Measure
the
insulation resistance between
BLUE
lead and the core.
WHITE
lead and the core.
BROWN
lead and the core.
I
Fig.
8-
11
ROTOR
Measure
the
insulation across one of
the
soldered
terminals of the rotor and
the
core.
Fig.
8-12
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27-