Connecting Sunny Central - Negative Grounding - SMA SUNNY CENTRAL STRING-MONITOR US Technical Description

SMA Solar Technology AG
7.5 Connecting Sunny Central - negative grounding
The Sunny Central may not be connected until the communication and the PV modules have been
connected (see section 6 "Communication connector" (page 29), section 7.2 "Connecting ground"
(page 38) and 7.4 "Connecting the PV modules - positive grounding" (page 44)).
DANGER
Risk of electric shock through reverse voltage from Sunny Central.
Death or serious injuries.
• Disconnect the AC side from the Sunny Central as described in the installation guide
of the Sunny Central.
Technical Data for the Connection to the Sunny Central
Max. number of output
lines per potential
DC Short Circuit Current
DC Max Continuous
Current
Technical Data for the Cables to the Sunny Central
Use 90 °C (194 °F), copper wire for all DC wiring connections to the Sunny Central String-Monitor.
Cables to the Sunny Central
DC+
DC–
Technical Description
Version 24
2
480 A
308 A
Cable Size
350 kcmil
350 kcmil
Version 32
2
480 A
308 A
SSMUS-TUS094511
Electrical Connection
Version 64
2
512 A
328 A
Torque
325 in-lb
325 in-lb
47