Fimer PVS-175-TL - Behaviour of a System with Leakage

FIMER_PVS-175-TL A.1 Version_Product manual_EN_RevC-
F
180
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.
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 can be located between the 4th and 5th PV module.
(+)
(-)
50 V 50 V 50 V 50 V
V
a
50 V 50 V
1 2 3 4 7 85 6 9 10
Vb
50 V 50 V 50 V 50 V
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.