Download smart string box

INSTALLATION GUIDE
11.7.
SMART STRING BOX
Revision of String with Inverted Polarity
Correct connection of the strings to the JUNCTION BOX must be checked in the presence of live voltage,
hence in the daytime.
DANGER
Correct connection of the strings to the JUNCTION BOX must be checked by expert
personnel only using all the necessary safety devices and precautions.
•
Make sure that the inverter connected to the SMART STRING BOX is NOT running, i.e. that it is
STOPPED.
•
Open the switch on the DC side of the converter.
•
Make sure that the disconnecting switch on the DC-SWITCH BOX is open.
•
Remove the cover from the JUNCTION BOX. The Lexan safety panel must be left in its seat.
•
With the aid of a multimeter check the polarity of the strings (between the positive pole input
terminal of each individual string and a negative pole input terminal).
If a string connection error is found:
•
Disconnect the inverted string from the JUNCTION BOX connector.
•
Correct the wiring of the inverted string (invert the connectors of the positive and negative poles
from the panels).
Once the strings have been correctly wired restore all the conditions for plant operation.
•
Replace the cover on the JUNCTION BOX.
•
Connect the strings to the quick-fit connectors.
•
Close the disconnecting switch on the DC-SWITCH BOX.
•
Close the switch on the DC side of the inverter.
Rev. 02 - 29/04/2013
83/106