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Page
56
of
76 MICRO-0.25/0.3-I-OUTD-US-208-240 BCG.00612_AB
Part
5 Troubleshooting Guide
5.2.2 B
EHAVIOR OF A
S
YSTEM WITH
L
EAKAGE
If the voltage measured between one of the two poles and ground does not tend to 0V and stabilizes
on a value, there is a ground leakage from the photovoltaic module.
Example: When the measurement is made between positive pole and ground, on a photovoltaic
module with Voc=37V, a voltage of 7V is measured.
5.3 MEASURING THE INSULATION RESISTANCE OF PHOTOVOLTAIC
MODULE
To measure the insulation resistance of the photovoltaic module compared to ground, the two poles
of the PV generator must be short-circuited (using a suitably sized selector), and verify that the
chassis of the module itself is referred to ground (of the inverter).