ZGR SOLAR STR 250
Operation manual
www.zigor.com
31
4.4.6.3
Installing the PV Connectors
1)
Rotate all the DC switches to "OFF" position (Fig. 4-40).
Fig. 4-40 Rotate all the DC switches
NOTE:
Skip performing step1 when the actual device is not equipped with DC switches.
2)
Check the cable connection of the PV string for polarity correctness and ensure that the open circuit
voltage in any case does not exceed the inverter input limit of 1500V (Fig. 4-41).
Fig. 4-41 Check the cable connection
3)
Connect the PV connectors to corresponding terminals until there is an audible click.
4)
Follow the foregoing steps to connect PV connectors of other PV strings.
5)
Seal the unused PV terminals with the terminal caps.
RS 485 communications connections
4.5
The following figure shows the position of the communication wiring board in the inverter as well as the terminals
equipped for the wiring board (Fig. 4-42).
NOTICE
Check the positive and negative polarity of the PV strings, and connect the PV connectors to corresponding
terminals only after ensuring polarity correctness.
Arc or contactor over temperature may occur if the PV connectors are not firmly in place, and ZIGOR shall not
be held liable for any damage caused.