Ac/ Dc Voltage Measurement - Benning PV 1-1 Bedienungsanleitung

8.3 Automatic measurement of the open-circuit voltage, short-circuit current and insulat-
ing resistance of the PV generator
The PV module/ PV string must not exceed the maximum opencircuit voltage
of 1000 V DC, the maximum short-circuit current of 15 A and the maximum DC
power (P = U x I) of 10 kW.
c
According to DIN EN 62446, the measurements have to be made for each PV string.
Measurements made at PV strings which are connected in parallel might in-
volve an overload of the BENNING PV 1-1.
During the insulating resistance measurement, the PV generator is shorted.
m
Measurement is made between the red 4 mm test socket and the shorted PV
test sockets.
In case DC polarity is wrong or DC voltage is within the range of < 5 V or
m
> 1000 V, it is not possible to make an automatic PV measurement.
- Connect the BENNING PV 1-1 to the PV module or the PV string by means of the enclosed
PV safety measuring leads.
- For insulating resistance measurement, connect the red safety measuring lead of the 4 mm
test socket L to a metal part (frame or mounting system) of the PV generator.
- If the PV generator is properly earthed by means of an earthing conductor, the red safety
measuring lead of the 4 mm test socket L can be connected alternatively to a safe earth
connection (equipotential busbar).
- Measurement of the PV open-circuit voltage is made automatically, if a DC voltage is applied
to the PV safety measuring leads (test sockets 9 and J ).
- In case of reversed polarity of the DC voltage, the polarity indication is flashing and the
symbol E is displayed. Automatic measurement will be blocked until the polarity of the DC
voltage is correct.
- As soon as a voltage of > 30 V is applied to the PV safety measuring leads, the
symbol F (Attention, dangerous voltage) is flashing.
- In order to set the testing voltage for measuring the insulating resistance , press the
5 and select the desired testing voltage (250 V, 500 V or 1000 V DC).
- Press the -key 3 to start the automatic PV measurement. The following measurements
Auto
will be made:
- measurement of the PV open-circuit voltage
- measurement of the PV short-circuit current
- measurement of the insulating resistance
- The measured values will be shown on the display 1 for approx. 20 seconds or until a key
is pressed.
- If the measured insulating resistance is higher than the preset limiting values, the
bol will be displayed next to the insulating resistance value. If the insulating resistance value
is lower than the limiting values, the
See figure 6: Automatic solar panel measurement, ISO measurement via earthing conductor
Preset limiting values:

8.4 AC/ DC voltage measurement

- Disconnect the PV safety measuring leads from the PV test sockets 9 and J .
- Connect the red and black safety measuring lead to the corresponding 4 mm test sockets K
and L.
- Connect the measuring probes to the voltage source to be measured.
- The BENNING PV 1-1 automatically measures the voltage at the measuring probes.
- The polarity of the DC voltage is displayed by "+ / –" A. In case of AC voltage, "+ / –" A will
be displayed alternately.
See figure 7: Voltage measurement via 4 mm test sockets
8.5 Current measurement by means of optional AC/ DC current clamp adapter
BENNING CC 3 (part no. 044038)
By means of the optional AC/ DC current clamp adapter BENNING CC 3, the BENNING PV 1-1
can be used to measure the operating current of a PV system. The determined current values
can be stored in the internal memory of the BENNING PV 1-1 and can be recalled.
- Disconnect all measuring leads from the BENNING PV 1-1.
- Connect the BENNING CC 3 current clamp adapter to the 4 mm test sockets K and L of
09/ 2012
V
ISO
250 V
500 V
1000 V
BENNING PV 1-1
symbol will be displayed.
Limiting value of insulating resistance
c
0.5 MΩ
1.0 MΩ
1.0 MΩ

warning
-key
V
ISO
sym-
18