Installation guide

10 PV Clinics Installation Manual 21/07/11 01.00 01/12
2.4 Power Board Connections
2.4.1 PV Array wiring (X1, X2, X4 and Busbars)
There must be a switch or disconnection device to disconnect the PV Array in accordance with local regula-
tions. This must be operated during installation to prevent electric shock (since PV Arrays typically operate at
dangerous voltages). Additional hazards arise because circuits carrying DC currents arc when broken (unlike
AC circuits).
String current measurement Inputs (X1 and X4)
Connect the negative pole from the PV Module string to the X1 and X4 (Transclinic 8xi+ and 14xi+ only) ter-
minals.
For the Transclinic 8xi+and 14xi+ connect the same number of PV strings to X1 and X4. At least one PV
string must be connected to each.
The maximum current for each string connection is:
• 20A for Transclinic 7xi+ and 14xi+
• 30A for Transclinic 4xi+ and 8xi+
Physical connection specifications:
• Cross sectional Area:
With ferrules from 0.5 to 10 mm²
Without ferrules from 0.5 to 16 mm²
• Tightening torque: 1.2-1.5 Nm
• Stripping length/blade size: 12mm/1.0 x 5.5
String current measurement common output (Busbar)
Connect the common connection for the output currents to the busbar(s) on the circuit board. When you
connect the common negative poles, be sure to use the proper torque on each stud (regardless of whether a
cable is connected or not). Always wire the output busbar whose input terminals are connected.
Physical connection specifications:
• Cable with M6 ring cable connector
• Tightening torque: 4-4.5 Nm