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4-4) MEASURING INSULATION RESISTANCE
Use a “Dr. Robin” generator tester in megger tester
mode or use a megger tester to check the insulation
resistance. Connect a megger tester to one of
receptacle output terminals and the ground terminal,
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 generator and measure the
insulation resistance of the stator, rotor and control
panel individually.
NOTE : Connect across the two output terminals of a
receptacle using a wire as shown in the figure
right before checking.
Wire
(2) STATOR
Check the insulation resistance between red lead
and core, blue lead and core, and white lead and
core respectively. Should any reading is less than 1
megohm, the stator is faulty.
(3) CONTROL PANEL
Measure the insulation resistances between the live
parts and the grounded parts.
NOTE : Connect across the two output terminals of a
receptacle using a wire as shown in the figure
right should the inverter unit is still connected to
the control panel.
Wire
Any part where the insulation resistance is less than 1M has faulty insulation, and may cause electric leakage
and electric shock.
Replace the faulty part.