Delta RPI Series, Operation And Installation Manual

Page: 19 / 154

4.3. DC Connection (from PV Array)
WARNING ！
• When undertaking DC wiring, please ensure the correct polarities are
connected.
• When undertaking DC wiring please ensures that the power switch on
the PV array is OFF.
CAUTION ！
• The connection number of PV Array, open circuit voltage and power of
all strings in DC1 must be coherent.
• The maximum open circuit voltage of PV Array cannot exceed 1000V.
• Any device installed between PV Array and inverter must meet the
following specifications:
Rated voltage > open-circuit voltage of PV Array.
Rated current > short-circuit current of PV Array.
• The input power to the inverter should not higher than the rated power
shown in table 4-3.
Model Current Rating Wire size
M15A / M20A DC 22A 4 - 6mm 2 / 12 - 10 AWG
Table 4-3 Maximum rating of input power
Table 4-4 Cable size
Figure 4-5 DC Wiring illustration
DC wiring polarities are divided into positive and negative, which is shown
in
Figure 4-5.
The connection shall be coherent with the indication marked
on inverter.
Type of limit RPI-M15A
Total input power 16.5 kW
DC1 or DC2 11.1 kW
RPI-M20A
22 kW
14.8 kW
PV-KST 4/6 Ⅱ PV-KBT 4/6 Ⅱ
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Wiring