Worldwide Energy and Manufacturing USA Co., Limited
14
3.5.3 DC Input (PV) Connection
When installation, it must use the equipped DC terminals to avoid inverter damage.
It is recommended to use independent breaker for each PV input, and before connecting,
the breakers must be off. We suggest to use the special DC breaker (rated voltage is 600V,
rated current is more than 20A).
Switch off the DC switch and external DC breakers before connecting the PV array.
Ensure that the connection between PV array and the inverter at positive pole and
negative pole is correctly.
The DC input voltage should be less than the max. input voltage of the inverter.
It's forbidden to connect the grounding wire with positive pole or negative pole of PV array,
or it will lead to inverter damage.
Use the equipped PV connector and metal terminal to connect the PV input. The PV
connecter includes positive connecter and negative connector, they match the corresponding
positive metal terminal and negative terminal, corresponding procedure as follows.
Step 1 Strip the insulation layer ofpositive wire and negative wire for about 7mm, as shown
in Figure3-16.
Figure3-16 Stripping diagram of DC input (unit: mm)
NOTE:It is recommended to use red wire as the positive wire, use black wire as negative wire
to avoid wrong connection. If using the wires of other colour, please confirm the
corresponding connection relationship.
Step 2 Unscrew the lock nut of positive and negative connection, lead the positive and
negative wires go through corresponding lock nut, and then insert the positive wire and
negative wire into the positive metal terminal and negative metal terminal respectively. Crimp
the metal terminals firmly by crimping pliers, as shown in Figure3-17.
Figure3-17 Crimp the metal terminal