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000813BG
5 - Installation
Behavior of a system with leakage
All the following activities must be performed wearing the PPE and using appropriate measuring
devices.
If the voltage measured between one of the two terminals and ground
does not discharge to 0V, but stabilizes on a non-zero value, there is
ground leakage from the PV array.
Example: If the measurement is made between positive terminal and
ground, and a voltage of 200V is measured....
V
200 V
300 V
t
This means that if the system is made up of 10 modules in series and
each one supplies 50V, the leakage is located between the 4th and 5th
PV module.
(+)
(-)
50 V
50 V
50 V
50 V
Va
50 V
50 V
1
2
3
4
7
8
5
6
9
10
Vb
50 V
50 V
50 V
50 V
Va = voltage measured b terminal and = 200V
Vb = voltage measured between - terminal and = 300V
In all measurements with , the ground of the inverter is indicated.
