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 1MΩ has faulty insulation, and may cause electric leakage and electric shock.
Replace the faulty part.
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