SMA SI 3324 Errata - Manual (Page 11)

SMA Solar Technology AG Electrical Connection
Installation Guide 11/16 SI3324_4248-E-IEN094410
1.4.3 Connecting the AC Input
Connect, with three wires via the distribution, the generator or the public grid to the Sunny Island's AC
input (D).
Wire the AC input as described in section 1.4.2 "Connecting the AC Output" (page 10).
DANGER!
Danger to life due to residual currents and ungrounded neutral conductor.
• Ground the grid-side PEN conductor within the system (before or at the point of
separation into N and PE conductors e.g., the connection from the house's junction
box to the equipotential bonding rail).
NOTICE!
Device damage due to high currents.
A maximum of 56 A should flow through the Sunny Island's AC input.
• Install a line circuit breaker on the grid side to protect the Sunny Island against
overcurrents.
• For maintenance work, the Sunny Island can be switched off via the line circuit
breaker on the grid side.
Transfer relay in the Sunny Island
The transfer relay in the Sunny Island connects the phase L-AC input with the L-AC output.
The transfer relay is interconnected for a switched off device and attached grid voltage. It
functions like a break contact.
No RCD circuit breaker with 30 mA in grid-side supply
Do not install an RCD circuit breaker with 30 mA in the grid-side supply, as this could
erroneously trip the supply due to the discharge currents of the Sunny Island against earth.