PV-ISOTEST
EN - 26
6. Use the arrow keys
or
and select the position “
Lim.
”.
The display shows the screen to the side.
7. Use the arrow keys (
,
) to set the
minimum
limit
threshold for insulation measurement, which can be
selected between
0.05 M
and
0.10M
.
GFL
15/10 – 18:04
R p
- - -
M
V P N V P E V N E
0 V 0 V 0 V
10 1500V 0.10M
NMOD Vtest.
Lim.
8. Connect the instrument to the PV string to be tested as shown in Fig. 8.
Remember
that any surge arresters connected to the string cables must be disconnected and that
it is advisable to measure upstream of any blocking diodes
Fig. 8: Instrument connection for insulation measurement in GFL mode
CAUTION
Upon pressing the
GO/STOP
key, different error messages can be displayed
by the instrument (see § 6.2.3) and, therefore, the test cannot be started.
Check and eliminate, if possible, the problem causing the error message
before going on with the test.
9.
Press and hold the GO/STOP key for 2s
in order to
start the test (insulation measurement in DUAL mode). In
case no error conditions occur, the instrument displays
the message “
Measuring…
” as shown in the screen to
the side.
GFL
15/10 – 18:04
R p
- - -
M
V P N V P E V N E
0 V 0 V 0 V
Measuring…
10 1500V 0.10M
NMOD
Vtest. Lim.