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000040DG
Behaviour of a system with leakage
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 PV generator.
Example: When the measurement is made between positive pole and
ground, a voltage of 200V is measured.
This means that if the system is made up of 10 modules in series and
each one supplies 50V, the leakage can be located between the 4th and
5th PV module.
Va = voltage measured between + pole and
= 200V
Vb = voltage measured between - pole and = 300V
In all measurements with , the ground of the inverter is indicated.
V
200 V
300 V
t
(+)
(-)
50 V 50 V 50 V 50 V
a
50 V 50 V
1 2 3 4 7 85 6 9 10
50 V 50 V 50 V 50 V
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