Maintenance
SMA America, LLC
90
SB50US-80US-IA-en-36
Installation Manual
– Insert the new DC varistor into the terminal.
– Pull the insertion tool out of the rectangular
opening of the terminal.
7. Ensure that all DC varistors in the terminals are securely in place.
8. Re-insert all string fuses into the DC disconnect:
– Remove the four fuse extractors without string fuses from the fuse holders (B) of the DC
disconnect.
– Equip the four fuse extractors with functional string fuses.
– Insert the four fuse extractors with the string fuses in the fuse holders (B) of the DC
disconnect.
9. Close the DC disconnect as described in Section 6.9 ”Closing the DC Disconnect” (page 57).
10. Re-connect the string connectors of all ungrounded DC cables to the PV array.
☑ Testing and replacement of the DC varistors is completed.
