7.5.15 I/V Curve
This function is used to scan the I/V characteristic curves of each PV strings.
Figure 7.49 I/V Curve
Set I/V Curve
I/V Curve Scan
7.5.15.1 Set I/V Curve
This setting can set the scanning voltage start point and the voltage interval.
Figure 7.50 Set I/V Curve
100V
010V
7.5.15.2 I/V Curve Scan
Press “ENT” to start the I/V curve scan.
Figure 7.51 I/V Curve Scan (1)
Scanning...01
After it is completed, the screen will display “Scan OK” and then enter the following section.
Figure 7.52 I/V Curve Scan (2)
Select String No.: 01
Figure 7.53 I/V Curve Scan (3)
9.56A
9.44A
Start_V: The start voltage of the I/V scan. (Adjustable from 100V-1400V)
Interval_V: The scanning voltage interval.(Adjustable from 001V-100V)
In total, 60 data points can be scanned.
The max scanning range is from 100-1450V.
7. Normal operation
.57.
.56.
7.6 AFCI function
Canadian Solar inverters have the built-in Type 1 Photovoltaic DC Arc-Fault Circuit-Protection
which can detect the arc fault on the DC circuit and shut down the inverter to prevent a fire
disaster.
7.6
.
1 Enable the AFCI function
The AFCI function can be enabled in the following.
Path: Advanced Setting -> Password: 0010 ->Special Settings -> AFCI Set ->
AFCI ON/OFF -> ON
Figure 7.54 Set AFCI
AFCI ON/OFF
AFCI Level
ON
OFF
WARNING:
The "AFCI Level" is reserved for Canadian Solar technicians ONLY.
Do not change the sensitivity otherwise it will lead to frequent false alarms or
malfunctions.
Canadian Solar is not responsible for any further damages caused by
unauthorized modifications.
NOTE:
The setting corresponds to the current status as well which can be used to
inspect the ON/OFF state of the AFCI function.
7.6
.
2 Arc Fault
During the normal operation, if an DC arc is detected, the inverter will shut down
and give out the following alarm:
Installer needs to thoroughly inspect the DC circuit to ensure all the cables are
correctly fastened.
Once the DC circuit issue has been fixed or it is confirmed to be OK, press “ESC” for
3s and wait for the inverter to restart.
ARC-FAULT
Restart Press ESC 3s
Figure 7.55 Arc Fault
7. Normal operation
