20
3.3.5
Connection of PV panels cables
For the models 6K and 8K it is possible to connect one string for each MPPT entry.
For the model 10K it is possible to connect one string for the entry MPPT “1” and two strings for the entry MPPT
“2”.
ATTENTION
Electrocution risk. Use insulating gloves and carpet foreseen for works done on hazardous
electrical components.
Before starting with the connection procedure, do the following checks on the electrical cables that come down
from the PV panels:
•
Check with a tester that on each line (string) is available a current lower than 950 Vdc.
•
Check with a tester the right polarity of the cables (red cable = pole “+”; black cable = pole “-“).
•
Insulate the cable tract that will be connected to the connector type MC4 (Picture 13).
•
Before starting the installation of the connector MC4, check with a tester that the potential difference
between the cable that is going to be connected and the Pe protective conductor of the electrical
installation is equal to 0 V.
Picture 13 – Secure the derivation cables from the string panel before the connection with MC4 connectors
OFF: 0 Vdc
