Z200 PV Analyzer
User Manual
6.5
Disconnect
APPLICATION.
The disconnect test is used to measure the position of a
disconnect in a string solar PV modules. The instrument will
measure the low frequency impedance of the PV string con-
nected. The condition for a PV system disconnect is a string
impedance at low frequencies, with a value higher than 10 k
Ω
.
The
number
of
PV
modules
is
ad-
justed
using
the
+
and
-
buttons
Then enter cable length [m] to the posi-
tive and the negative string terminal point.
Last enter the cable capacitance.
Use
the default value of 80 pF/m for normal
dry weather conditions.
Set the value at
120 pF/m in wet and moist environments.
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