SMA SC 500U Installation - Manual (Page 46)

SMA Solar Technology AG
46 SC500U-IUS093411 Installation Guide
8.3 Connection Options
There are various options for connecting the Sunny Central to the public grid and the PV modules.
When placing your order these options will enable you to adapt the Sunny Central connection area
to the characteristics of the PV modules and the grid. This section demonstrates the various connection
options.
8.3.1 Grid Types
The Sunny Central can be connected to the following grids:
• 480 Delta:277 WYE (preset)
• 480 Delta
The figure below illustrates the grid types.
8.3.2 DC Fuses
The Sunny Central can be delivered with 6, 7, 8 or 9 DC fuses. Every fuse has a separate rail to which
1 or 2 DC strings can be connected.
8.3.3 Grounding the PV modules
Depending on the configuration option, you can connect positive or negative grounded PV modules
to the Sunny Central.
DANGER
During operation, high voltages are present in the Sunny Central.
Death resulting from burning and electric shock.
• The cofiguration of the Sunny Central for another grid may only be maintained by
SMA service personnel. Contact the SMA Serviceline for support (see section
14 "Contact" (page 72)).
480 V
480 V 480 V
480 V
480 V 480 V 277 V
277 V
277 V
N
A A
C B C B