About Photovoltaic inverter resistance measurement
Method: Use megohm-meter to measure the PV string’s insulation resistance of the positive or negative pole to the ground one by one. The impedance must be greater than 150KΩ.
Method: Use megohm-meter to measure the PV string’s insulation resistance of the positive or negative pole to the ground one by one. The impedance must be greater than 150KΩ.
To measure the insulation resistance between the positive electrode and earth, connect the measuring ends of an insulation tester to the positive electrode and earth.
The measurement is usually done before the turning on of the PV inverter or at least once or twice per day. For a 1000 Vdc system, normal practice requires insulation resistance to be more than 1 MΩ.
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