Benning PV 1-1+ - Automatic PV measurement - Procedure

Operation
5.5 Automatic PV measurement
5290 / 06/2023 en BENNING PV 1-1+ 31
Procedure
1. Connect the PVsafety measuring lines to the device [}page25].
2. Bring the PVsafety measuring lines into contact with the individual PVmodule or the
individual PVstring.
Make sure that the respective safety measuring lines are contacted properly and safely with
the PVgenerator.
If DCvoltage is applied to the PVsafety measuring lines, the PVopen-circuit voltage will be
measured automatically.
3. Connect the red 4mm safety measuring line to the device [}page25].
4. Bring the red 4mm safety measuring line into contact with a metal part (frame or mounting
system) of the PVgenerator.
If the PVgenerator is properly earthed, you can alternatively measure the insulating
resistance against a safe earth connection (e.g. equipotential busbar).
If the PVgenerator is not earthed, first measure the insulating resistance against a metal
part (frame or mounting system) of the PVgenerator and then against a safe earth
connection (e.g. equipotential busbar).
5. Select the desired insulation test voltage of 250V‑DC, 500V‑DC or 1 000V‑DC. To do this,
press the “V
ISO
“key until the desired insulation test voltage is shown on the digital display.
6. Start the automatic PVmeasurement. To do this, press the “Auto”key.
When the measurement is completed, the measured values will be shown on the digital
display for approx. 20seconds or until a key is pressed.
If the measured insulating resistance is higher than the preset limits, the “ ”symbol will be
shown next to the measured value on the digital display. If the measured value is lower than
the limits, the “ ”symbol will be displayed.
7. Press the “Save”key to store the measured value to the next free storage location available.