SMA SC 500CP-US Maintenance Manual - Manual (Page 17)

SMA America, LLC 3 Product Description
Maintenance Manual SCCP-US-WH-US_en-30 17
Inverter with External AC Disconnect and External DC Disconnect
As an option, the internal AC circuit breaker of the inverter can be mounted externally.
Figure 3: Principle of a grid-tie PV plant with an inverter without integrated AC Disconnect
Position Designation
A PV modules
B String-Combiner
C Inverter with integrated AC Disconnect
D DC Disconnect Unit
E External transformer
F Utility grid
Circuit breaker
The unit is provided with a UL listed circuit breaker on the output rated 1,600 A for branch circuit protection. If the
circuit breaker shall be located externally to secure the AC path, you have to use the same type of circuit breaker
(ABB Emax E2B-A with 42 kA rated short-circuit current, ABB Emax E2N-A with 65 kA rated short-circuit current or
ABB Emax E2H-A with 85 kA rated short-circuit current and and 1,600 A continuous current rating each).
Position Designation
A PV modules
B String-Combiner
C Inverter without integrated AC Disconnect and without integrated DC switch
D AC / DC Disconnect Unit
E External transformer
F Utility grid