Robin America RGX305, RGX305D, RGX405, RGX405D, RGX505, RGX505D Service Manual page 38

. STATOR
Measure the insulation resistance between the red or white
coupler from the stator and the core.
Fig. 8- 70
. ROTOR
Measure the insulation resistance between the core and
one of the slip rings of the rotor.
Fig. 8- 11
. CONTROL BOX
Measure the insulation between the live parts and the
casing or grounded part. Close the no-fuse breaker first,
then measure it.
Any part which has an insulation resistance of less than 1
megohm has a faulty insulation, which can cause electric
shock or leakage. Replace such parts.
Fig. 8- 12
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