Fimer PVS-175-TL - ?Registration Website” and “Admin Plus Token”; Verification of Ground Leakage; Behaviour of a System Without Leakage

FIMER_PVS-175-TL A.1 Version_Product manual_EN_RevC-
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Verification of ground leakage
In the presence of anomalies or report of ground fault (where provided), there may be a ground
leakage from the PV generator (DC side).
To check this, measure the voltage between the positive pole and ground and between the negative
pole (of the PV generator) and ground using a voltmeter whose input accepts a voltage sufficient for
the dimensions of the photovoltaic generator.
Behaviour of a system without leakage
Due to the capacitive effect of the PV generator, during the first moments that the voltmeter is
connected between one of the two poles and ground, it will measure a voltage of about Voc/2, which
will tend to stabilize to around 0V if there is no ground leakage, as shown in the graph below:
Voc
V
t
+Vs
-Vs
NOTE – D The internal resistance of the voltmeter tends to zero the voltage present on the
PV generator due to the capacitive effect.
How to make the measurement:
Volt
(+)
(-)